Information to ATEX for use in hazardous areas · 2015. 1. 22. · Information to ATEX for use in hazardous areas 2 A5E03312404-01, 09/2010 The following table provides an overview

© Siemens, All rights reserved Ⓟ 2010 A5E03312404-01, 09/2010 1

Continuous gas analysis Field devices of Series 6 Information to ATEX for use in hazardous areas Compact Operating Instructions

1 Introduction 1.1 Purpose of this documentation These instructions are a brief summary of important features, functions and safety information, and contain all information required for safe use of the device. It is your responsibility to read the instructions carefully prior to installation and commissioning. In order to use the device correctly, first review its principle of operation.

The instructions are aimed at persons who mechanically assemble the device, connect it electrically, and start it up.

To achieve optimum usage of the device, read the detailed version of the manual on the electronic data medium.

1.2 Notes on warranty The contents of this manual shall not become part of or modify any prior or existing agreement, commitment or legal relationship. The sales contract contains all obligations on the part of Siemens as well as the complete and solely applicable warranty conditions. Any statements regarding device versions described in the manual do not create new warranties or modify the existing warranty.

The content reflects the technical status at the time of publishing. Siemens reserves the right to make technical changes in the course of further development.

1.3 Intended use ● This analyzer is used to quantitatively determine components in a gaseous sample.

● This analyzer may only be used for the purposes specified in these instructions and in the associated detailed Operating Instructions.

● Modifications to the analyzer which are not expressly referred to in these instructions and in the associated detailed Operating Instructions therefore result in an application which is not in accordance with the intended use. Such modifications are then the exclusive responsibility of the user.

1.4 Field of application

Notes

These Operating Instructions only describe the field device versions of Series 6 (CALOMAT 6F/CALOMAT 62F, OXYMAT 6F, and ULTRAMAT 6F) which are approved for operation in hazardous areas in accordance with EU Directive 94/9/EC (ATEX). All other analyzer versions are not considered in these Operating Instructions.

Information to ATEX for use in hazardous areas 2 A5E03312404-01, 09/2010

The following table provides an overview of the associated analyzers.

Table 1-1 Field devices of Series 6 approved for operation in hazardous areas

Certificate Ex type of protection Device MLFB No. OXYMAT 6F 7MB201x-xxxxx-2

7MB201x-xxxxx-3 ULTRAMAT 6F 7MB211x-xxxxx-2

7MB211x-xxxxx-3 CALOMAT 6F 7MB251x-xxx0x-xAEx

PTB 00 ATEX 2022 X Pressurized enclosure with leakage compensation for Zone 1

II 2 G Ex px [ia] ia IIC T4

CALOMAT 62F 7MB253x-xxx0x-xAEx OXYMAT 6F 7MB201x-xxxxx-6

7MB201x-xxxxx-7 ULTRAMAT 6F 7MB211x-xxxxx-6

7MB211x-xxxxx-7 CALOMAT 6F 7MB251x-xxx0x-xAFx

TÜV 01 AT EX 1708 X Pressurized enclosure with continuous purging for Zone 1

II 2 G Ex px [ia] ia IIC T6/T4/T3

CALOMAT 62F 7MB253x-xxx0x-xAFx OXYMAT 6F 7MB201x-xxxxx-0xxx-ZE12

7MB201x-xxxxx-1xxx-ZE12 ULTRAMAT 6F 7MB211x-xxxxx-0xxx-ZE12

7MB211x-xxxxx-1xxx-ZE12 CALOMAT 6F 7MB251x-xxx0x-xACx

TÜV 01 ATEX 1697 X Simplified pressurized enclosure with continuous purging for Zone 2

II 2/3 G Ex pz [ia] IIC T6/T4 Gc and

II 2/3 G Ex nR [ia] IIC T6/T4 Gc

CALOMAT 62F 7MB253x-xxx0x-xACx OXYMAT 6F 7MB201x-xxxxx-0xxx-ZE11


7MB211x-xxxxx-1xxx-ZE11 CALOMAT 6F 7MB251x-xxx0x-xABx

TÜV 01 ATEX 1686 X Restricted breathing enclosure for Zone 2

II 3 G Ex nR IIC T4/T6 Gc

CALOMAT 62F 7MB253x-xxx0x-xABx OXYMAT 6F 7MB201x-xxxxx-0xxx-ZE40


7MB211x-xxxxx-1xxx-ZE40 CALOMAT 6F 7MB251x-xxx0x-xAGx

TÜV 03 ATEX 2278 X Dust protection by enclosure for Zone 22

II 3 D Ex tc IIIC T60°C/T65°C/T82°C/T130°C Dc

CALOMAT 62F 7MB253x-xxx0x-xAGx OXYMAT 6F 7MB201x-xxxxx-0xxx-ZE41


7MB211x-xxxxx-1xxx-ZE41 CALOMAT 6F 7MB251x-xxx0x-xAHx

TÜV 03 ATEX 2278 X Dust protection by enclosure for Zone 22 and TÜV 01 ATEX 1686 X restricted breathing enclosure for Zone 2

II 3 D Ex tc IIIC T60°C/T65°C/T82°C/T130°C Dc and

II 3 G Ex nR II T4/T6 Gc CALOMAT 62F 7MB253x-xxx0x-xAHx OXYMAT 6F 7MB201x-xxxxx-0xxx-ZE42


7MB211x-xxxxx-1xxx-ZE42 CALOMAT 6F 7MB251x-xxx0x-xAJx

TÜV 03 ATEX 2278 X Dust protection by enclosure for Zone 22 and TÜV 01 ATEX 1697 X pressurized enclosure for Zone 2

II 3 D Ex tc IIIC T60°C/T65°C/T82°C/T130°C Dc and

II 2/3 G Ex pz [ia] IIC T6/T4 Gc or

II 2/3 G Ex pz nR [ia] IIC T6/T4 Gc

CALOMAT 62F 7MB253x-xxx0x-xAJx

Information to ATEX for use in hazardous areas A5E03312404-01, 09/2010 3

It is essential that you also observe the respective "Special conditions" of the certificates referred to in the table.

These describe

● the fields of application,

● the requirements for operation in hazardous areas,

● other precautionary measures which are important for operation.

The technical specifications in these Operating Instructions may be different to those in the associated Operating Instructions for the analyzers and additional equipment under some circumstances. The technical specifications listed in these Operating Instructions are valid in such cases.

1.5 Checking the consignment 1. Check the packaging and the device for visible damage caused by inappropriate handling during shipping.

2. Report any claims for damages immediately to the shipping company.

3. Retain damaged parts for clarification.

4. Check the scope of delivery by comparing the shipping documents with your order for correctness and completeness.

WARNING

Using a damaged or incomplete device Danger of explosion in hazardous areas. ● Do not use any damaged or incomplete devices.

2 Safety instructions This device left the factory in good working condition. In order to maintain this status and to ensure safe operation of the device, observe these instructions and all the specifications relevant to safety.

Observe the information and symbols on the device. Do not remove any information or symbols from the device. Always keep the information and symbols in a completely legible state.

Qualified personnel for hazardous area applications

Persons who install, assemble, commission, operate and service the device in a hazardous area must have the following specific qualifications:

● They are authorized, trained or instructed in operating and maintaining devices and systems according to the safety regulations for electrical circuits, high pressures and aggressive as well as hazardous media.

● They are authorized, trained, or instructed in carrying out work on electrical circuits for hazardous systems.

● They are trained or instructed in maintenance and use of appropriate safety equipment according to the pertinent safety regulations.

WARNING Improper device modifications Danger to personnel, system and environment can result from modifications to the device, particularly in hazardous areas. ● Only carry out modifications that are described in the instructions for the device. Failure to observe this requirement

cancels the manufacturer's warranty and the product approvals.

Due to the large number of possible applications, each detail of the described device versions for each possible scenario during commissioning, operation, maintenance or operation in systems cannot be considered in the instructions. If you need additional information not covered by these instructions, contact your local Siemens office or company representative.


Note Operation under special ambient conditions We highly recommend that you contact your Siemens representative or our application department before you operate the device under special ambient conditions as can be encountered in nuclear power plants or when the device is used for research and development purposes.

Symbol Explanation of the symbols on the device

Consult operating instructions

Warning of hot surface

Warning of dangerous voltage

2.1 Laws and directives Observe the test certification, provisions and laws applicable in your country during connection, assembly and operation. These include, for example:

● National Electrical Code (NEC - NFPA 70) (USA)

● Canadian Electrical Code (CEC) (Canada)

Further provisions for hazardous area applications are for example:

● IEC 60079-14 (international)

● EN 60079-14 (EC)

2.2 Conformity with European directives The CE marking on the device shows the agreement with the regulations of the following European guidelines:

EMC 2004/108/EC

Directive of the European Parliament and of the Council on the approximation of the laws of the Member States relating to electromagnetic compatibility and repealing Directive 89/336/EEC.

Low-voltage directive 2006/95/EC

Directive of the European Parliament and of the Council on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits.

ATEX 94/9/EC

Directive of the European Parliament and the Council on the approximation of the laws of the Member States concerning equipment and protective systems intended for use in potentially explosive atmospheres.

The applied standards and associated versions can be found in the corresponding EC declaration of conformity.


2.3 General directives for explosion protection

WARNING Use of an unsuitable device for the hazardous area Danger of explosion if incorrect device for the hazardous area. ● Only use the device within the characteristics specified on the nameplate and in Section Technical specifications

(Page 28) for the hazardous area.

You must connect an appropriate purging unit in the case of analyzers with type of protection "Pressurized enclosure Ex px or Ex pz". This purging unit ensures that the overpressure is monitored reliably and that the volume flow is monitored fail-safe (redundant).

If an analyzer is used with type of protection "Pressurized enclosure Ex pz" in Zone 2, you must provide a purging unit with type of protection "Ex px" when connecting combustible or occasionally explosive sample gases.

2.3.1 External explosion protection

Overview

The external explosion protection serves to prevent penetration of explosive gas mixtures (gas damp) into the enclosure or ignition on the surface. For this reason, the analyzer is purged with protective gas and - with category 2 devices (Ex zone 1) - the control panel additionally operated via an intrinsically-safe isolating component.

2.3.1.1 Pre-purging phase The pre-purging phase serves to displace any combustible gases present prior to switching on the analyzer. During this time (5 min), the enclosure is purged with 5 times its own volume.

2.3.1.2 Operating phase The pre-purging phase is followed by the operating phase:

● In Ex px mode with leakage compensation, only that volume of protective gas required to hold an overpressure of ≥ 50 Pa compared to atmospheric and the sample gas is added.

● In Ex px or Ex pz mode with continuous purging, the protective gas flows through the enclosure at ≥ 1 l/min. An overpressure of ≥ 50 Pa compared to atmospheric is built up at the same time.

Either inert gas (e.g. nitrogen) or air must be used as the protective gas depending on the sample gas composition. Dissipation of the protective gas into the Ex zone is only permissible with spark protection and a particle barrier.

2.3.2 Internal explosion protection Internal explosion protection refers to the sample gas path (containment system CS) in the analyzer and to the ignition protection of the process gas. A differentiation must be made between the following cases:

● Non-combustible sample gases and gas mixtures below the LEL: Flame inhibitors can be omitted. However, it must be guaranteed that the sample gas in the CS always remains below the lower explosive limit!

● Occasionally explosive sample gases: These may only be connected to the CALOMAT 6F/CALOMAT 62F and OXYMAT 6F gas analyzers if the inlets and outlets for sample gas and reference gas have each been provided with a flame inhibitor. The flame inhibitors must meet the safety requirements for the combustible medium. The following applies to the reference gas path of the OXYMAT 6F: A flame inhibitor can be omitted at the reference gas inlet if it is guaranteed that the reference gas is connected before the analyzer is switched on and that the reference gas pressure is permanently monitored. The ULTRAMAT 6F analyzer may also be used without flame inhibitors.

● Gas mixtures which are frequently or permanently explosive: These must not be connected!

● Sample gases above the other explosive limit: These must be individually assessed in accordance with the separate certificate with application of inert gas as the protective gas.


2.3.3 Further safety measures The exhaust lines for the sample and reference gases must terminate outside the hazardous area at a harmless position. The sample gas exhaust line can also be returned to the sampling point.

When connecting combustible or non-combustible sample gases into the hazardous area, both the sample gas inlet and outlet must be provided with a flame inhibitor.

When connecting combustible media, you must interrupt the sample gas supply after switching off the analyzer and the pressurized enclosure or when the pressurization is actuated in the event of a fault.

The maximum permissible sample gas pressure in the analyzer depends on the type of connected gas, and is described in the technical specifications under the point "Sample gas input conditions".

See also

Technical specifications (Page 28)

2.3.3.1 Analyzer versions Ex px with leakage compensation The containment system (sample gas path in the analyzer) is rated as without release if

● the gaseous medium is not combustible,

● the gaseous medium is combustible, but the gas concentration is always below the lower explosion limit which must be guaranteed by a safety level of at least Category 4 to EN ISO 13849-1,

● the gaseous medium is combustible, and the differential pressure between the enclosure and the containment system is monitored. The pressure in the enclosure must always be at least 50 Pa above the pressure in the containment system. This monitoring of the differential pressure between the enclosure and the containment system must be carried out at the following safety level:

– the pressure monitoring of the containment system by the system itself is at least Category 1 to EN ISO 13849-1 (operational reliability) and the differential pressure monitoring between the containment system and the protective gas is at least Category 1 to EN ISO 13849-1, or

– the differential pressure monitoring between the containment system and the protective gas is at least Category 3 to EN ISO 13849-1 (fault tolerance, 1-fail-safety) without consideration of any plant-based safety function. A comparable international standard can also be applied instead of EN ISO 13849-1.

The assessment of the safety level of the monitoring devices also includes faults in the pressure and gas lines. When assessing the safety level of the monitoring devices it is assumed that the monitoring devices are independent of one another. When linking the monitoring device into a total function, this must be guaranteed with a safety level of at least Category 3 to EN ISO 13849-1.

2.3.3.2 Analyzer versions Ex px with continuous purging or Ex pz with use of the containment system With gas/air mixtures above the LEL, fault tolerance of the containment system is not guaranteed in the sense of EN 60079-2 since sample gas can be released into the pressurized enclosure as a result of leaks (e.g. O-rings). However, this release can be assessed as limited. The maximum quantity released is below 200 µl/min, and is guaranteed by the quality assurance measures of the analyzer manufacturer when the analyzer is delivered.

Continuous purging of the Ex p enclosure must therefore be carried out following the pre-purging phase. This guarantees that sample gas released by a leak is diluted to such an extent that an explosive gas mixture cannot occur. The volume flow of the protective gas has therefore been set to 1 l/min; this is more than 100 times the maximum quantity of sample gas released.


2.3.3.3 Analyzer versions Ex nR with restricted breathing enclosure In analyzers with a restricted breathing enclosure (type of protection Ex nR), only sample gases may be connected whose composition is below the lower explosion limit (LEL).

The connection of combustible to occasionally explosive gas mixtures is not permissible with this type of explosion protection!

The connections for the protective gas (purging gas) must be closed gas-tight!

2.3.3.4 Pressurized analyzers Ex pz for use in hazardous Zone 2 Combustible gases or gas/air mixtures whose composition is also occasionally above the lower explosion limit (LEL) may not be connected to analyzers with simplified pressurized enclosures (protection rating Ex pz). Gases may only be connected to the sample gas path pursuant to the hazardous Zone 1 definition if the analyzer is fitted with a px purging unit.

The connection of frequently or permanently explosive gas mixtures is not permissible with this type of explosion protection!

The connections for the protective gas must be closed gas-tight if protective gas is not used for the corresponding part of the analyzer.

2.3.3.5 Ex tc analyzer versions with dust protection by enclosure Only sample gases whose composition is below the lower explosion limit (LEL) may be connected to analyzers with dust protection by enclosure (protection rating Ex tc).

The connection of combustible to occasionally explosive gas mixtures is not permissible with this type of explosion protection!

The connections for the protective gas must be closed gas-tight!

3 Assembly/installation/mounting 3.1 Assembly guidelines

Installing the devices

Install the explosion-proof analyzer and - if required - the Ex px safety equipment at a location free from vibrations. Protect the devices from direct sunlight.

● Secure the analyzer and the Ex px safety equipment (if applicable) in accordance with your dimensional drawings, and connect them as shown in the diagrams in Section Connecting (Page 10). A dimensional drawing of the analyzer can be found in Section Dimensions for preparing installation (Page 8), the dimensional drawing of the Ex p safety equipment in the associated description.

Exhaust lines

Make sure that the minimum internal diameter and the length of the protective gas exhaust lines are dimensioned such that a pressure of 165 hPa is not exceeded inside the enclosure and that the volume flow of the protective gas is at least 1 l/min.

Protection from impact energy

Make sure that the device has sufficient protection from impact energy of over 2 Joules in the area of the windows.

See also

Technical specifications (Page 28)


3.2 Further assembly instructions for devices with Ex nR or Ex tc protection ● Note that all cables must be secured in place!

● Close the protective gas (purging gas) nozzles gas-tight!

3.3 Dimensions for preparing installation

14,0

Nameplate- external -

Nameplate;on inside of left housing panel

External equipotential terminal(M5 terminal link)

438,0

328,0

311,0

20,026,5

444,

0

480,

0

Figure 3-1 CALOMAT 6F, CALOMAT 62F, OXYMAT 6F, and ULTRAMAT 6F:

dimensions for preparing installation, front view and side view


3.4 Further safety instructions

WARNING Exceeded maximum permissible operating pressure Danger of injury or poisoning. The maximum permissible operating pressure depends on the device version. The device can be damaged if the operating pressure is exceeded. Hot, toxic and corrosive process media could be released. ● Make sure that the device is suitable for the maximum permissible operating pressure of your system. Refer to the

information on the nameplate and/or in "Rated operating conditions".

WARNING Wetted parts unsuitable for the process media Danger of injury or damage to device. Hot, toxic and corrosive media could be released if the process medium is unsuitable for the wetted parts. ● Ensure that the material of the device parts wetted by the process medium is suitable for the medium. Refer to the

information in "Technical data".

3.4.1 Installation location requirements

CAUTION Direct sunlight Device damage. The device can overheat or materials become brittle due to UV exposure. ● Protect the device from direct sunlight. ● Make sure that the maximum permissible ambient temperature is not exceeded. Refer to the information in "Technical

data".

WARNING Insufficient air circulation Risk of fire. The device may overheat or start burning in case of insufficient air circulation. ● Ensure sufficient air circulation in the room. Refer to the information in Chapter Technical specifications (Page 28).

3.4.2 Proper mounting

WARNING Open cable inlet or incorrect cable gland Danger of explosion in hazardous areas. ● Close the cable inlets for the electrical connections. Only use cable glands or plugs which are approved for the relevant

type of protection.

CAUTION Incorrect mounting The device can be damaged, destroyed or its functionality impaired through improper mounting. ● Before installing ensure there is no visible damage present on the device. ● Make sure that process connectors are clean, and suitable gaskets and glands are used. ● Mount the device using suitable tools. Refer to the information in "Technical data" , for example installation torques

requirements.


4 Connecting

① Electronics unit ④ Sample gas inlet ② Terminal block for electric connections ⑤ Analyzer section ③ Cable glands ⑥ Spring bolts (example; total of 8 for the two parts of the

enclosure) Figure 4-1 ULTRAMAT 6F, enclosure open

For all field devices, the left half of the enclosure contains the electronics unit ①, the right half the analyzer section ⑤. To make the connections, you must open the enclosure of the field device. To do this, unscrew the spring bolts ⑥ until you feel the spring pressure. You can then remove the screws by hand.


4.1 Connection of sample gas and protective gas (purging gas) Devices used in hazardous areas must be be purged with air or inert gas. The gas discharged by purging must be routed via an exhaust gas line for environmentally-friendly disposal.

When measuring toxic or corrosive gases, it could occur that sample gas accumulates in the analyzer because of leaks in the gas path. No gases containing potentially hazardous concentrations of toxic, corrosive or combustible components may therefore be connected to restricted breathing devices (Ex nR).

Analyzers provided with heating must always be purged when using with corrosive gases.

Secure the analyzer and the Ex px safety equipment in accordance with your dimensional drawings in Section Connection diagrams (Page 15), and connect them as shown in the assembly diagrams 4-2 and 4-3. The following information applies to use of the Ex px safety equipment recommended by us in accordance with our current catalog PA01. This information applies accordingly to all other purging units.

It is essential that you observe the following conditions for trouble-free operation:

● When tightening union nuts on the gas couplings, use a suitable open-ended spanner to achieve correct counterlocking; otherwise the danger exists that the gas path will leak.

● The operator must ensure the minimum pressure of the protective gases at the installation site. A pressure of 0.2 ... 0.4 MPa (2 ... 4 bar) must be applied at the pressure regulator of the Ex px safety equipment.

● When the protective gas is tapped, the pressure drop over the line must not amount to more than 5 hPa (5 mbar) at a flow of 50 /min. To achieve this, the exhaust air line must be dimensioned accordingly (e.g. the length of the exhaust air line may be about 20 m with an internal diameter of G 1").

● The pre-purging time which can be set on the Ex px safety equipment (5 min with a protective gas flow of 50 l/min) must not be changed (this is the minimum!).

● The Ex px safety equipment is delivered with fixed basic parameters. The protective gas pressure is preset to 105 hPa (rel.). Useful modifications of these parameters such as reduction of the maximum protective gas pressure can be made in accordance with the information in the manual enclosed with the Ex px safety equipment.

● Sample gas must not be supplied to the analyzer until the pre-purging phase has ended.

● A key switch can be connected to the Ex px safety equipment (see Section 4.3 (Page 25) for details).

● OXYMAT 6F: Before supplying sample gas, make absolutely sure that the microflow sensor is purged by reference gas. Therefore the reference gas must also be connected (pre-purging period = 5 min) when the Ex px safety equipment is switched on. The reference gas pressure must always be 0.2 ... 0.4 MPa (2 ... 4 bar) above the sample gas pressure.

4.1.1 Analyzer versions with leakage compensation When operating with combustible sample gases, the difference in pressure between the protective gas and sample gas must be permanently and reliably kept at over 50 hPa. Differential pressure monitoring must be provided for fail-safety. This should ensure that the Ex px safety equipment switches off the analyzer and goes into the pre-purging phase when a set pressure difference is fallen below. It is up to the user to select a suitable differential pressure monitoring device (e.g. differential pressure switch).

OXYMAT 6F: The sample gas inlet contains a restrictor which creates a dynamic pressure to damp pulsating flows. It may therefore be recommendable to remove this restrictor if the differential pressure is to be monitored (in versions with leakage compensation). The damping measure (restrictor) should then be fitted upstream of the pressure measuring point when required.


4.2 Electric connections

4.2.1 Safety instructions

WARNING Missing PE/ground connection Danger of electric shock. Depending on the device version, connect the power supply as follows: ● Power plug: Ensure that the used socket has a PE/ground conductor connection. Check that the PE/ground conductor

connection of the socket and power plug match each other. ● Connecting terminals: Connect the terminals according to the terminal connection diagram. First connect the PE/ground

conductor.

WARNING Improper laying of shielded cables Danger of explosion through compensating currents between hazardous area and the non-hazardous area. ● Only ground shielded cables that run into the hazardous area at one end. ● If grounding is required at both ends, use an equipotential bonding conductor

WARNING Improper power supply Danger of explosion in hazardous areas as result of incorrect power supply, e.g. using direct current instead of alternating current. ● Connect the device in accordance with the specified power supply and signal circuits. The relevant specifications can

be found in the certificates, in Chapter "Laws and directives (Page 4)" or on the nameplate.

WARNING Lack of equipotential bonding Danger of explosion through compensating currents or ignition currents through lack of equipotential bonding. ● Ensure that the device is potentially equalized. Exception: It may be permissible to omit connection of the equipotential bonding for devices with type of protection "Intrinsic safety Ex i".

WARNING Incorrect selection of type of protection Danger of explosion in areas subject to explosion hazard. This device is approved for several types of protection. 1. Decide in favor of one type of protection. 2. Connect the device in accordance with the selected type of protection. 3. In order to avoid incorrect use at a later point, make the types of protection that are not used permanently

unrecognizable on the nameplate.

WARNING Unsuitable cables and/or cable glands Danger of explosion in hazardous areas. ● Only use suitable cables and cable glands complying with the requirements specified in "Technical data". ● Tighten the cable glands in accordance with the torques specified in "Technical data". ● When replacing cable glands use only cable glands of the same type. ● After installation check that the cables are seated firmly.


WARNING Dangerous contact voltage Danger of electric shock in case of incorrect connection. ● For the electrical connection specifications, refer to the information in Chapter "Electric connections (Page 13)". ● At the mounting location of the device observe the applicable directives and laws for installation of electrical power

installations with rated voltages below 1000 V.

WARNING Unsuitable devices Only devices which do not generate sparks during operation may be connected to non-energy-limited circuits in Zone 2 or 22, and these must be suitable for operation in hazardous areas of Zone 2 or 22 and the conditions present at the location of use.

4.2.2 Electric connections Please observe the following for correct operation:

● A mains circuit-breaker must be provided in the building installation.

● Connect the analyzer's enclosure to the equipotential bonding (see also associated Operating Instructions).

● Use solid or stranded cables with a cross-section of not more than 2.5 mm² for wiring the terminals.

● Provide all stranded conductors with end sleeves.

● Keep all connection cables within the analyzer short.

● Identify the intrinsically-safe lines and route them separately from the non-intrinsically-safe lines. Observe the minimum distances required when doing this.

● Connect the power supply and signal lines according to the terminal wiring plans of the devices to be connected (see the appropriate Operating Instructions).

● Be particularly careful with the cable inlets (cable glands). Use sealing rings corresponding to the cable diameters for the cable glands. Cable diameter ranges and torques M for the screwed glands:

– M 20: cable diameter: 6 ... 12 mm; M = 3.8 ± 0.2 Nm

– M 25: cable diameter: 10 ... 14 mm; M = 5.0 ± 0.2 Nm

4.2.3 Inputs and outputs The analog inputs and outputs of the analyzers are not intrinsically-safe in the basic version.

For use in hazardous areas, all non-intrinsically safe inputs and outputs must be wired via Ex-coupling relays so that no external voltages are present should the protective gas supply in the device fail.

You can mount additional Ex isolating components on the rail present in the analyzer.

You must agree on these additional devices with the Ex specialist responsible prior to startup.

See also

Additional equipment (Page 27)


4.2.4 Additional equipment It is possible to add additional equipment/components to a mounting rail in the left hand part of the analyzer. The following points must be observed:

● The mounting rail is approx. 250 mm long which limits the number of components which can be installed.

● The max. installation height incl. mounting rail is 115 mm, but is shorter in the vicinity of the display (approx. 88 mm). The width of the additional equipment must not exceed 100 mm.

● The additional equipment must be licensed for an ambient temperature up to 60 °C; this temperature can be reached under extreme ambient conditions.

● You must also specify the Ex protection types of the retrofitted components on the analyzer.

● Installation of additional equipment must always be agreed upon with the Ex specialist responsible.


4.3 Connection diagrams

4.3.1 Connection diagram for the versions Ex px with leakage compensation

Figure 4-2 Connection diagram for the analyzer versions Ex px with leakage compensation


4.3.2 Connection diagram for the analyzer versions Ex px and Ex pz with continuous purging

Figure 4-3 Connection diagram for the analyzer versions Ex px and Ex pz with continuous purging


4.3.3 Terminal connection diagrams

12345678910111213141516171819202122232425M

33343536

26272829303132

373839

M

M

M

M

1

2

3

4

59

8

7

6

Figure 4-4 Terminal connection diagram for motherboard of field devices


M

M

21

37

1234

33343536

567891011121314151617181920212223242526272829303132

37

Figure 4-5 Terminal connection diagram for AUTOCAL board of field devices


4.3.4 Gas connections to the field devices

5

For M 20: 6 ... 12 mm

e.g. RS485/Profibus-PA-Ex

Power supply cord

0 20,0

42,0

77,0

112,

0

148,

0

184,

0

250,

0

259,

0

394,

0

418,

0

0

58,0

65,0

127,0

201,0

237,0

253,0

271,0

OXYMAT 6F CALOMAT 6FULTRAMAT 6F

Figure 4-6 Connections of the BR 6 field devices ULTRAMAT 6F, OXYMAT 6F and CALOMAT 6F


11

7

221221 3

4

5

6

11 Sample gas inlet 11; 12; 21; 2212 Sample gas outlet Gas connections:21 Reference gas inlet female thread 1/8"-27 NPT22 Reference gas outlet acc. to ANSI B 1.20.13; 4 not used 5-8 Purging gas couplings 10 mm or 3/8" diameter PA Equipotential bonding

Figure 4-7 Connections of the CALOMAT 62F analyzer


5 Startup Commissioning can only be performed properly when the person doing the commissioning is familiar with the contents of the manuals and operating instructions provided. The safety and warning information included there must be observed in particular.

The sample gas path of the analyzer must be checked for leaks each time it is started up. This is described in the Section Leak testing (Page 22).

The following safety information applies in addition to operation in hazardous areas.

WARNING Improper commissioning in hazardous areas Device failure or danger of explosion in hazardous areas. ● Do not commission the device until it has been mounted completely and connected in accordance with the information

in Chapter "Connecting (Page 10)". ● Before commissioning take the effect on other devices in the system into account.

WARNING Dangerous contact voltage Danger of injury through dangerous contact voltage when the device is open or not completely closed. The degree of protection specified on the nameplate or in Chapter "Technical specifications (Page 28)" is no longer guaranteed if the device is open or not properly closed. ● Make sure that the device is securely closed.

WARNING Loss of explosion protection Danger of explosion in hazardous areas if the device is open or not properly closed. ● Close the device as described in Chapter "Connecting (Page 10)".

WARNING Opening device in energized state Danger of explosion in areas subject to explosion hazard. ● Only open the device in a de-energized state. ● Check prior to commissioning that the cover, cover locks, and cable inlets are assembled in accordance with the

directives. Exception: Devices having the type of protection "Intrinsic safety Ex i" may also be opened in energized state in hazardous areas.

WARNING Absence of pre-purging Danger of explosion in areas subject to explosion hazard. Explosive atmosphere existing in a device with pressurized enclosure (type of protection Ex p) can result in an explosion during commissioning. ● Ensure that the device is pre-purged before it is commissioned. ● Ensure that purging time, quantity and medium are correctly observed. Refer to the information in Chapter Technical

specifications (Page 28).


5.1 Leak testing of containment system

Pressurized enclosure Ex px and Ex pz

The analyzers may only be used in hazardous areas if all required gas inlet and outlet lines have been connected prior to startup and tested for leaks and tightness with 1.5 times the respective maximum permissible operating pressure.

The operator is responsible for the required gas inlet and outlet lines. These must also correspond to "Pressurized enclosure" protection requirements and must be tested separately in accordance with the EN 609079-2 standard.

5.1.1 Recommended test setup for CALOMAT 6F, CALOMAT 62F and OXYMAT 6F

2, 4 11, 12

Connections of sample gas path M Manometer (gauge pressure)

3 21

Connection of reference gas (if present) PR Pressure regulator

BI Blanking plug V1 Shut-off valve (leak rate < 10-6 kPa*l/s) Figure 5-1 Recommended test setup for CALOMAT 6F, CALOMAT 62F and OXYMAT 6F

Install the test setup as follows:

1. Close the sample gas outlet ② using a blanking plug. 2. If the analyzer has a reference gas connection, also close its inlet ③ using a blanking plug. 3. Install a suitable shutoff valve (e.g. needle valve V1) of sufficient tightness into the sample gas line upstream of the

sample gas inlet ①. 4. Connect a pressure regulator with a measuring range of 200 kPa (OXYMAT 6F) or 50 kPa (CALOMAT 6F) and a

resolution of 0.1 kPa upstream of the shutoff valve V1.


5.1.2 Recommended test setup for ULTRAMAT 6F

BI Blanking plug M Manometer (gauge pressure) 2 Outlet of sample gas path DR Pressure regulator 4 Outlet of reference gas path V1 Shut-off valve (leak rate < 10-6 kPa*l/s) Figure 5-2 Test setup for the leak test of the sample gas path and the flow-type reference gas path (dashed line) of the

ULTRAMAT 6F

Install the test setup as follows:

1. Close the sample gas inlet ① using a blanking plug. 2. Install a suitable shutoff valve (e.g. needle valve V1) of sufficient tightness into the sample gas line downstream of the

sample gas outlet ②. 3. Connect a pressure regulator with a measuring range of 50 kPa and a resolution of 0.1 kPa downstream of shutoff valve

V1.

4. Proceed accordingly if the analyzer has a flow-type reference gas connection (③, ④, dashed line). Close the reference gas inlet ③ and install the test setup downstream of the reference gas outlet ④.

5.1.3 Carrying out the leak test Proceed as follows:

1. Carefully open the needle valve. A pressure is then built up in the containment system.

2. Once the test pressure has been reached (see following table), close the needle valve again.

3. Wait approx. 5 minutes. Thermal compensation is carried out in the analyzer during this time. The temperature of the sample gas path must not change during the test!

4. Now determine the pressure change Δp during a period of a further 5 minutes.

The gas path is sufficiently tight if the pressure change Δp in 5 minutes is less than the test value listed in the following table.

OXYMAT 6F Test pressure 2.0 bar (rel.) Test value *) Δp = 3 mbar (hPa) CALOMAT 6F Test pressure 0.5 bar (rel.) Test value *) Δp = 6 mbar (hPa) CALOMAT 62F Test pressure 0.1 bar (rel.) Test value *) Δp = 9.5 mbar (hPa)

Test pressure 0.5 bar (rel.) With a chamber length in mm 0,2 ... 6 20 60 90 180

ULTRAMAT 6F

Test value *) Δp in mbar (hPa) 12 8,5 4,6 3,4 2

*) The test values have been defined under the assumption that the volume between the shutoff units (valves) and the containment system is a maximum of 10 ml. This corresponds to a pipeline with an internal diameter of 4 mm and a length of approx. 80 cm.


5.2 Ex px safety equipment

Prerequisite

● You operate the analyzer in one of the following Ex protection types:

– Pressurized enclosure with leakage compensation for Zone 1 II 2 G Ex px [ia] ia IIC T4 in accordance with certificate PTB 00 ATEX 2022X

– Pressurized enclosure with continuous purging for Zone 1 II 2 G Ex px [ia] ia IIC T4 in accordance with certificate TÜV 01 ATEX 1708 X

● You have connected the analyzer to the Ex px safety equipment according to the connection diagrams in Section Connection diagrams (Page 15).

Prior to startup, you must still:

● Check the power supply

● Seal all unnecessary cable glands using the supplied plugs.

● Screw in the occupied screw cable glands carefully.

● Close the doors. You must tighten the screws evenly until the door frame touches the enclosure surface.

● Set the protective gas to the required pressure (0.2 ... 0.4 MPa upstream of pressure regulator).

● Set the pressure regulator of the Ex px safety equipment to at least 0.2 MPa.

When measuring combustible gases with Ex px protection rating with leakage compensation, you must ensure that the sample gas pressure applied to the analyzer is not more than 160 hPa (160 mbar) above the ambient pressure and is always more than 5 hPa below the protective gas pressure. If this condition cannot be guaranteed at all times, you must fit a differential pressure monitor between the sample gas and purging gas as additional protection.

After carrying out the measures described above, you can

● open the ignition gas path and

● switch on the power supply

to start up the analyzer.

5.3 Pressure correction There is an internal pressure sensor in the ULTRAMAT 6F for correcting the influence of atmospheric pressure. This is connected to the ambient air by a pipe. To avoid explosive atmosphere diffusing into the pressure sensor, this pipe must be connected to a hose which ends in the non-hazardous area.

A higher sample gas pressure up to 1 500 hPa can only be measured with an external pressure sensor. Its signal must be fed intrinsically-safe into the analyzer. Its parts wetted by the sample gas must meet the requirements of the measurement. Connection and parameterization of an external pressure sensor are described in the associated Operating Instructions.

In the OXYMAT 6F the influence of the sample gas pressure can be corrected by the internal pressure sensor in a range up to 2 000 hPa. A higher pressure up to approx. 3 000 hPa can only be measured with an external absolute pressure sensor.

The CALOMAT 6F/CALOMAT 62F is largely independent of the input pressure as a result of its measuring procedure (thermal conductivity). It may nevertheless be necessary to compensate the influence of pressure using an external pressure sensor. An external pressure sensor is also required if the input pressure is greater than 1 100 hPa absolute.

Note Using external pressure sensors If an external pressure sensor is used, the internal pressure sensor must be sealed if it is not connected to the non-hazardous area.


5.4 Key switch The Ex protection of the Ex p safety equipment can be deactivated (key inserted in the lock) using a key switch (bypass switch). In this manner, the analyzer can also be connected electrically without protective gas purging, e.g. for maintenance work. Some Ex p safety equipment offers the possibility of effecting the key switch function with an operating function (key code).

Commissioning with the key switch always requires permission of the owner or a person authorized by him. It may only be granted if it is certain that there is no explosive atmosphere for the duration of the planned work or if the necessary precautions against the risk of explosion have been taken (fire permission certificate).

At the end of maintenance work, make absolutely sure that the key switch is turned off again through removal of the key.

6 Service and maintenance 6.1 Safety Instructions

WARNING Impermissible accessories and spare parts Danger of explosion in areas subject to explosion hazard. ● Only use original accessories or original spare parts. ● Observe all relevant installation and safety instructions described in the instructions for the device or enclosed with the

accessory or spare part.

WARNING Commissioning and operation with pending error If an error message appears, correct operation in the process is no longer guaranteed. ● Check the gravity of the error ● Correct the error ● If the device is faulty:

– Take the device out of operation. – Prevent renewed commissioning.

WARNING Improper connection after maintenance Danger of explosion in areas subject to explosion hazard. ● Connect the device correctly after maintenance. ● Close the device after maintenance work. Refer to Chapter "Analyzer (Page 27)".

See also

Ex px safety equipment (Page 27)


CAUTION Dangerous voltage at open device Danger of electric shock when the enclosure is opened or enclosure parts are removed. ● Before you open the enclosure or remove enclosure parts, de-energize the device. ● If maintenance measures in an energized state are necessary, observe the particular precautionary measures. Have

maintenance work carried out by qualified personnel.

CAUTION Hot parts in the device Temperatures that can burn unprotected skin may be present for some time after the device has been switched off. ● Observe the waiting time specified in the technical data or on the device before starting with maintenance work.

WARNING Enclosure open Danger of explosion in hazardous areas as a result of hot components and/or charged capacitors inside the device. Proceed as follows to open the device in a hazardous area: 1. Isolate the device from power. 2. Observe the wait time specified in Chapter "Technical specifications (Page 28)" or on the warning sign before opening

the device. Exception: Devices having the type of protection "Intrinsic safety Ex i" may also be opened in an energized state in hazardous areas.

WARNING Dust layers above 5 mm Danger of explosion in hazardous areas. Device may overheat du to dust build up. ● Remove any dust layers in excess of 5 mm.

WARNING Maintenance during continued operation in a hazardous area There is a danger of explosion when carrying out repairs and maintenance on the device in a hazardous area. ● Isolate the device from power. - or - ● Ensure that the atmosphere is explosion-free (hot work permit).

6.1.1 Notes on operation

WARNING Faulty adjustment and reassembly Only carry out adjustments using appropriate tools in order to avoid short-circuits on the electronic PCBs. If the assembly or adjustment is faulty, dangerous gas may escape in certain cases, resulting in a danger to health (poisoning, burns) and corrosion on the analyzer.

Types of protection Ex pz', 'Ex nR', and 'Ex tc'

● The control panel (window + keyboard) must only be cleaned using a moist cloth.

● The keyboard must only be used for servicing purposes (diagnostics, calibration/adjustment).


6.2 Analyzer Following maintenance or the retrofitting of parts associated with explosion protection, the analyzer may only be started when an Ex specialist has ensured that the analyzer has the essential features and meets the requirements for explosion protection and issues a certificate to this effect and/or has attached a test symbol to the equipment.

When restarting, make sure that the device has sufficient protection from impact energy of over 2 Joules in the area of the windows.

Annual maintenance of the analyzer must be carried out to check the electrical safety and reliable operation, in particular the tightness of the sample gas path within the analyzer. Furthermore, a leak test must be carried out following each intervention in the gas path (containment system). The leak test is described in Section Leak testing of containment system (Page 22)

The owner can extend maintenance intervals in individual cases if no negative effects can be expected on wetted parts materials (gaskets in particular).

Further information on maintenance of the analyzer can be found in the associated Operating Instructions.

6.3 Ex px safety equipment

6.3.1 Spare parts You can use the following spare parts for the gas analyzers used in hazardous areas:

● Device fuse (Ex), Order No. A5E00061505 on the back of the left-hand door.

● The complete left-hand door can also be renewed if the left-hand door module (with keyboard and display) is damaged. There are different door modules depending on the device type and explosion protection rating. Please consult our service personnel if necessary.

WARNING Impermissible repair of the device ● Repair must be carried out by Siemens authorized personnel only.

The diagnostics and elimination of faults is described in the Operating Instructions of the Ex px safety equipment concerned.

The proportional valve controlled by the Ex px safety equipment is protected by a fuse. With various types of Ex px safety equipment, this fuse may be located at a position on your control electronics which is inaccessible from the outside. In such cases, the complete control electronics must be replaced if the fuse is blown. Inform the manufacturer of the production No. of the Ex px safety equipment to obtain the matching replacement electronics with the parameters of the delivered state. This replacement must only be made by authorized personnel of the Ex px safety equipment’s manufacturer.

It is not possible to switch over to the pre-purging phase if the proportional valve or outlet valve fails.

6.4 Additional equipment Maintenance and troubleshooting of the additional equipment is described in the appropriate Operating Instructions.

6.5 Spare parts You can use the following spare parts for the gas analyzers used in hazardous areas:

● Device fuse (Ex), Order No. A5E00061505 on the back of the left-hand door.

● The complete left-hand door can also be renewed if the left-hand door module (with keyboard and display) is damaged. There are different door modules depending on the device type and explosion protection rating. Please consult our service personnel if necessary.


7 Technical specifications The complete technical specifications are described in detail in the respective Operating Instructions of the analyzers used. The following tables show the data relevant to explosion protection. If the values specified here differ from those in the respective Operating Instructions, the values specified here apply.

Position of use

Danger zone Zone 1 and zone 2 Ambient temperature 5 ... 45 °C Moisture No cooling below dew point during storage and operation

Explosion protection

Ignition protection type ● Pressurized enclosure Ex px with leakage compensation: (device versions 7MB251x-xxx0x-xAEx, 7MB253x-xxxx-xxEx, 7MB201x–xxxxx–2 or 3xxx and 7MB211x–xxxxx–2 or 3xxx)

● Pressurized enclosure Ex px with continuous purging: (device versions 7MB251x-xxx0x-xAFx, 7MB253x-xxxx-xxFx, 7MB201x–xxxxx–6 or 7xxx and 7MB211x–xxxxx–6 or 7xxx)

● Intrinsic safety i for keyboard isolation component and PROFIBUS PA output option

Device Ex px with leakage compensation

Ex px with continuous purging Temperature class *)

O 6F, unheated O 6F, heated U 6F C 6F C 62F

T4 T3 T4 T4 T4

T4 T3 T6 (T4 with PROFIBUS PA module) T4 T4

Explosion group IIC *) Assuming that the doors of the enclosure are opened at the earliest 10 minutes after switching off the power.

Ignition protection type ● Pressurized enclosure Ex pz with continuous purging: (analyzer versions 7MB251x-xxx0x-xACx, 7MB201x–xxxxx–0xxx or 1xxx-ZE12 and 7MB211x–xxxxx–0 or 1xxx-ZE12)

Temperature class *) OXYMAT 6F, unheated OXYMAT 6F, heated ULTRAMAT 6F CALOMAT 6F CALOMAT 62F

T4 T3 T6 (T4 with PROFIBUS PA module) T4 T4



Ignition protection type ● Restricted breathing enclosure Ex nR: (analyzer versions 7MB251x-xxx0x-xABx, 7MB201x–xxxxx–0xxx or 1xxx-ZE11 and 7MB211x–xxxxx–0 or 1xxx-ZE11)

Temperature class *) OXYMAT 6F, unheated OXYMAT 6F, heated ULTRAMAT 6F CALOMAT 6F CALOMAT 62F

T6 T4 T6 T6 T6


Ignition protection type ● Dust protection by enclosure Ex tD for Zone 22: (analyzer versions 7MB251x-xxx0x-xAGx, 7MB201x–xxxxx–0xxx or 1xxx-ZE40 and 7MB211x–xxxxx–0 or 1xxx-ZE40)

Temperature class *) OXYMAT 6F, unheated OXYMAT 6F, heated ULTRAMAT 6F, unheated ULTRAMAT 6F, heated CALOMAT 6F CALOMAT 62F

T60 °C T130 °C T65 °C T82 °C T65 °C T65 °C


Electric connection data

Electric connection data All analyzers, all types of protection, if not specified otherwise Power supply 100 ... 120 V AC, 48 ... 63 Hz or

210 ... 240 V AC, 48 ... 63 Hz, Um = 264 V AC

Analog output 0/2 (4 ... 20 mA, potential-free, load: 750 Ω, optionally with type of protection "Intrinsic safety Ex ia IIC/IIB or Ex ib IIC/IIB" in accordance with the test certificate of the associated equipment

Tightening torque M M 20 cable gland: M = 3.8 ± 0.2 Nm M 25 cable gland: M = 5.0 ± 0.2 Nm

Relay outputs (6 changeover contacts) 24 V, 1 A AC or 1 A DC Serial port RS 485

Optionally with type of protection "Intrinsic safety Ex ia IIC/IIB or Ex ib IIC/IIB Only for connection to a certified intrinsically-safe circuit with the following maximum values: Effective internal inductance Li: 8 μH Effective internal capacitance: Ci: negligibly small (


Sample gas input conditions

Sample gas input conditions of analyzer versions Type of gas Non-combustible gases or gas mixtures which

always remain below the LEL in accordance with Category 4 to EN ISO 13849-1: 2006

Combustible gases up to gas mixtures which are occasionally explosive

Max. pressure pmax ● 1 100 hPa for C 6F and C 62F ● 3 000 hPa for O 6F ● 1 500 hPa for U 6F

● Analyzer versions Ex px with leakage compensation – 100 hPa (rel.) for C 6F and C 62F – 160 hPa (rel.) for O 6F and U 6F

● Analyzer versions Ex px with continuous purging and Ex pz "Pressurized enclosure" – 1 100 hPa for C 6F and C 62F – 3 000 hPa for O 6F – 1 500 hPa for U 6F

Min. pressure pmin ● 500 hPa for O 6F ● 600 hPa for U 6F ● 800 hPa for C 6F and C 62F

-200 hPa (rel.)

Temperature C 6F: 0 ... 60 °C C 62F: 0° ... 60 °C O 6F: 0 ... 130 °C U 6F: 0 ... 65 °C

Sample gas flow rate qv C 6F: 0.5 ... 1.5 l/min O 6F: 0.3 ... 1.0 l/min U 6F: 0.3 ... 1.5 l/min

Pneumatic data of the protective gas

Data values Enclosure volume Approx. 50 l Protective gas ● Inert gas (e.g. nitrogen from a gas cylinder)

● Air from an ex-free zone; prerequisite: free from oil and dust, particle size


Ex px safety equipment

In principle, any Ex px safety equipment with a type examination certificate to ATEX can be used. This safety equipment must have at least the following features:

● A safety level of at least Category 3 to EN ISO 13849-1 for monitoring during pre-purging, and a safety level of at least Category 1 to EN ISO 13849-1 for monitoring during operation, or a transferable safety level from another comparable international standard.

● Adjustable pre-purging phase; protective gas flow must be ≥ 50 l/min

● Limiting of protective gas pressure during the pre-purging phase: < 165 hPa

● With leakage compensation or continuous purging = 1 l/min (depending on version)

● Connection of protective gas lines: 10 mm or 3/8" diameter from/to analyzer

● Inlet pressure for protective gas supply: 0.2 ... 0.4 MPa

● Relay contacts for all-pole isolation of the analyzer's power supply

● Relay contacts for disconnecting additional equipment (e.g. Ex isolating relay)

● Connection facility for key switch with intrinsically-safe scan

● Only for analyzer version with leakage compensation: Connection facility for key switch with intrinsically-safe scan

Differential pressure monitoring

Only applies to analyzer version Ex p with leakage compensation.

The sample gas pressure must be supplied fail-safe to the analyzer (within the specified limits, see Technical specifications (Page 28)). If only an operationally safe supply is available, an additional differential pressure switch must be provided (see also point 5 in "Special conditions" of the EC-Type Examination Certificate).

If flame inhibitors are fitted, differential pressure switches and/or relative pressure sensors must be connected via a T-piece between the sample gas inlet couplings and the flame inhibitors (see Assembly guidelines (Page 7) and assembly diagram for the versions Ex p with leakage compensationConnection diagram for the versions Ex px with leakage compensation (Page 15)).

Accessories required for differential pressure monitoring:

Differential pressure switches Order No. Wetted parts materials Switching point For corrosive and non-corrosive sample gases

7MB8000-5AA 1.4571 Adjustable between -20 and +20 hPa

Accessories

Applies to all analyzer versions.

Flame inhibitor Order No. 7MB8000-6BA 7MB8000-6BB Material 1.4571 Hastelloy

The design of parts wetted by the sample gas must meet the application requirements and should be selected accordingly.

Isolating relay Order No. 7MB8000-4AB 7MB8000-4AA Coil power supply 110 V AC 240 V AC Contacts 8 NO contacts 8 NO contacts

Isolating transformer Order No. 7MB8000-3AB Output signal (safety) 18.8 V / 107 mA / 503 mW


8 ESD directives

CAUTION Electrostatic sensitive devices can be destroyed by voltages which are far below the human perception limit. These voltages already occur if you touch a component or the electric connections of a module without being electrostatically discharged. The damaged caused on a module by an overvoltage is not usually recognized immediately, but only becomes evident after a longer period of operation.

Fundamental measures to protect against static discharge

● Provide good grounding: When handling electrostatic sensitive devices, provide good grounding for persons, workstation and packaging. In this manner you avoid static discharge.

● Avoid direct touching: Only touch electrostatic sensitive devices when this is absolutely unavoidable (e.g. during maintenance). Hold the modules so that you touch neither pins nor printed conductors. In this manner, the discharge energy cannot reach or damage sensitive devices. If you have to carry out measurements on a module, discharge yourself before carrying out any actions. To do this, touch grounded metal objects. Only use grounded measuring instruments.

A. List of abbreviations Abbreviation/symbol Explanation " Inch (1 inch corresponds to 25.4 mm) < Less than > Greater than ≤ Less than or equal to ≥ Greater than or equal to ° Degrees °C Degrees Celsius CS Containment system (piped sample gas path inside the

analyzer) cm Centimeter DIN German industry standard EN European standard Ex aa Explosion protection classified as per ATEX hPa Hectopascal kPa Kilopascal l Liter L Line (phase in power lines) LEL Lower explosion limit


Abbreviation/symbol Explanation MG Sample gas min Minute MLFB Machine-readable product code mm Millimeter mm² Square millimeter MPa Megapascal N Neutral (in power lines) Pa Pascal PE Protective Earth rel. Relative UEL Upper explosion limit VG Reference gas Δp Differential pressure

Siemens AG Industry Sector Postfach 48 48 90026 NÜRNBERG Information to ATEX for use in hazardous areas A5E03312404, 09/2010

1 Introduction1.1 Purpose of this documentation1.2 Notes on warranty1.3 Intended use1.4 Field of application1.5 Checking the consignment

2 Safety instructions2.1 Laws and directives2.2 Conformity with European directives2.3 General directives for explosion protection2.3.1 External explosion protection2.3.1.1 Pre-purging phase2.3.1.2 Operating phase

2.3.2 Internal explosion protection2.3.3 Further safety measures2.3.3.1 Analyzer versions Ex px with leakage compensation2.3.3.2 Analyzer versions Ex px with continuous purging or Ex pz with use of the containment system2.3.3.3 Analyzer versions Ex nR with restricted breathing enclosure2.3.3.4 Pressurized analyzers Ex pz for use in hazardous Zone 22.3.3.5 Ex tc analyzer versions with dust protection by enclosure

3 Assembly/installation/mounting3.1 Assembly guidelines3.2 Further assembly instructions for devices with Ex nR or Ex tc protection3.3 Dimensions for preparing installation3.4 Further safety instructions3.4.1 Installation location requirements3.4.2 Proper mounting

4 Connecting4.1 Connection of sample gas and protective gas (purging gas)4.1.1 Analyzer versions with leakage compensation

4.2 Electric connections4.2.1 Safety instructions4.2.2 Electric connections4.2.3 Inputs and outputs4.2.4 Additional equipment

4.3 Connection diagrams4.3.1 Connection diagram for the versions Ex px with leakage compensation4.3.2 Connection diagram for the analyzer versions Ex px and Ex pz with continuous purging4.3.3 Terminal connection diagrams4.3.4 Gas connections to the field devices

5 Startup5.1 Leak testing of containment system5.1.1 Recommended test setup for CALOMAT 6F, CALOMAT 62F and OXYMAT 6F5.1.2 Recommended test setup for ULTRAMAT 6F5.1.3 Carrying out the leak test

5.2 Ex px safety equipment5.3 Pressure correction5.4 Key switch

6 Service and maintenance6.1 Safety Instructions6.1.1 Notes on operation

6.2 Analyzer6.3 Ex px safety equipment6.3.1 Spare parts

6.4 Additional equipment6.5 Spare parts

7 Technical specifications8 ESD directivesA. List of abbreviations

Documents

Information to ATEX for use in hazardous areas · 2015. 1. 22. · Information to ATEX for use in hazardous areas 2 A5E03312404-01, 09/2010 The following table provides an overview