User`s Manual Eletric Initiation

7/27/2019 User`s Manual Eletric Initiation

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ELECTRIC INITIATIONUSERS MANUAL


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Photo: Reinhold Carlsson, Stig O Olofsson

Illustrations: Gsta Lithner, Thommy Gustafsson

SOO/2002-08/utgva1Eng/TB

ELECTRIC INITIATION

USERS MANUAL

This users manual is intended as a guide for all persons using

electric initiation when blasting.

This users manual gives knowledge about the range of possi-

bilities that a well designed and developed initiation system can

provide and also points out the risks that may be present when

using electric initiation.This manual only describes products and systems from Dyno

Nobel.The detonators presented in this manual are solely intended for

initiation of explosives in boreholes. The only exception is when

electric detonators are used for initiation of NONEL-rounds, in

this case the detonator must be well covered with drill cuttings,

sand or similar material.

The detonators described in this manual must not be used in gassy

environments such as in coal mines and other work sites where

explosive gasses may occur.


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ContentDetonator description 2

Group 1 detonator (A/S/NT) 5

Group 1A detonator (U) 5

Group 2 detonator (VA) 6

Group 3 detonator (HU) 6

Color coding 7

Marking on the detonators shell 8

VA-OD 8

Joining detonators in a round 8MS and HS-detonators 9

Measuring and testing of electric rounds 10

Electric resistance values for different groups of detonators 11

Resistance and insulation meter RIM2 12

Measuring with RIM2 13

Firing of a round 14

Blasting machine CB 20 VA 15

Operating instructions for blasting machine CB 20 VA 16

Blasting machine CI 160 VA 18

Operating instructions for blasting machine CI 160 VA 20

Finding faults 21Connection wire and ring cables 22

Hazards in connection with electric initiation 23

Destruction of detonators 25

Data sheet 26

Handling of misres 27

Declaration of conformity 29


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2

Detonator description.

Legwires

Sealing plug

Crimp

Protection of

fusehead

Fusehead

Bridge wire

Delay element

Initition element

(I-element)

Base charge

Aluminum shell

The principle of operation of an electric detonator is that,

when a high enough electric current is passed through the

legwires, a bridge wire is heated in the fusehead, which then

deagrates and initiates the delay element which in turn ini-tiates the explosive in bottom of the detonator after a time

determined by the length and content of the delay element.

Dyno Nobels electric detonators have a strength rating of

No. 8 (according to Prior test 10) for the safe initiation of

cap sensitive explosives and primers. They are known as

NPED*-detonators (Non Primary Explosive Detonator),

this means they do not contain any primary explosive

(e.g. lead azide). NPED-detonators are considerably less

sensitive to impact and rough handling than detonators

that contain primary explosive.

The sensitive lead azide in a conventional detonator is

replaced by an I-element in which PETN is enclosed in

a steel tube. In the I-element a deagration turns into a

detonation which in turn initiates the base charge.

The detonator shell, which is made of aluminum, contains,

in addition to the secondary explosive in the I-element, a

base charge of RDX (also a secondary explosive) which

initiates the explosive in contact with the detonator. The

total amount of explosives in the detonator is approx. 1 g.

In the delay element the detonation is delayed pyrotechni-

cally for a predetermined time after the ring impulse hasreached the detonator.

The delay times vary in steps between 25 ms (0.025 sec.)

and 5000 ms (5 sec.). Enclosing the fusehead is an electro-

static protective sleeve that decreases the risk of uninten-

tional initiation due to static discharge.

The detonator is tted with a sealing plug to make it water

resistant.

Electric detonators are manufactured with two types of

delay, millisecond delay (MS) and halfsecond delay (HS).

In the MS-detonators the delay time increases in incre-

ments of 25 ms between each period number while the

increment is 500 ms in the HS-detonators .

Electric HS-detonators are designed for use in underground operations as longer delay times are

needed in tunnel rounds to give enough time for the rock to break and be thrown from the tunnel

face. HS-detonators are prohibited for use in surface operations as the delay times are too long and

can cause yrock.

As underground activities have become more electried electric HS-detonators have lost much of their

importance and have been replaced by non-electric initiation systems such as NONEL LP which reduce

the risk of unintentional initiation.

Electric MS-detonators are used in surface operations and mostly in smaller operations with low bench

heights.

* US patent No. 4.727.808


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T Tn+1

The delay time of an electric detonator is the sum of the delays in the delay element, the intermediate com-

position, used for ne tuning of the accurate delay time, and the I-element. The delay element is chosen by

test ring to determine its delay time. Samples are taken from different batches. The delay of the I-element

is consistant and does not change between different times of manufacture. When the delay time of the delay

element is known the intermediate composition is placed on the I-element to ne tune the delay time to

acheive the nominal time.

During the last 50 years research has been concentrated on better precision in the timing of the detonators.However, there is an unavoidable time scatter between different detonators with the same nominal delay

time. The scatter depends on small differences in raw material, packing density of the pyrotechnical mate-

rial and the age of the detonator.

In the MS-series the delay time between the different period numbers is short (0.025 sec.) and the margins

small to avoid overlapping. Overlapping is when a detonator with a higher period number explodes before

one with at lower period number.

To avoid overlapping both precision and accuracy are needed. The delay times must not scatter too much in

combination with a mean value that does not differ too much from the nominal value. This is explained by the

following picture. Good precision and accuracy is achieved when the mean value is right and the scatter is low.

Good precision, right mean value

Good precision, wrong mean value

Bad precision, right mean value

Bad precision, wrong mean valuePrecision in timing for a number of detonators may be compared to precision in rie shooting.


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For safe and successful blasting with electric deto-

nators the following is needed:

1. A ring pattern designed for the round to

be blasted.

2. A blasting machine capable of ring the

size of the round with the type of detonatorsbeing used.

3. Knowledge of electric hazards at the work-

site and ensuring they are eliminated.

4. That each series in series/parallel blasts are

of the same size. Careful connection of

lead wires and scrupulous testing of the

different parts of the round.

The design of the ring pattern depends on the

number of detonators in the round and the type of

blasting machine that is used. Generally rounds withless than 50 detonators can be connected in one

series. Larger rounds can be divided into several

series which are then connected together in parallel.

The source of energy that is used for the initiation

of an electric blast must be approved by the appro-

priate authority in the country where it is used.

A capacitor blasting machine which is capable of

ring the number of detonators in the round is the

most reliable means of initiation.

Knowledge of the hazards at the worksite that

could cause unintentional initiation of one or sev-

eral electric detonators is absolutely necessary in

order to be able to eliminate them. See page 23 forthe risks that may occur and recommendations for

their elimination.

It is important to take extreme care when ring with

electric detonators.Lack of attention to detail can

result in damage to property and injury to people.

All electrical connections must be well-made and

all joints well insulated. Bare electric wires mustnot come into contact with earth. The resistance of

all series must be checked and must tally with the

calculated values. Each series in a round connected

in series/parallel should have the same resistance

and only approved connecting wire and ring cable

must be used.


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For a successful simultaneous initiation of a great number of detonators, sufcient electrical power must

be delivered to all detonators within a few milliseconds. The time required to heat up the bridgewire until

the fusehead deagrates is a function of the voltage and the current.

It is important that all detonators in a ring circuit are initiated instantaneously. If one detonator in the

round res before any other the circuit breaks and one or several detonators will not get the ring impulse

and misres will occur.

Therefore, Dyno Nobels instantaneous detonators have a very short delay time which is obtained by apyrotechnical batch which is pressed directly into the detonator. Due to the very short delay time, there

is no risk that the ring current breaks the circuit too early in a circuit with several detonators connected

in series. Therefore, instantaneous detonators should not be connected in series.

Different types of detonators have different ring properties and must not be used in the same round. The

same is true for detonators from different manufacturers.

Electric detonators are classied in 4 Groups or 4 Classes depending on their electric properties. The

denomination Group is the traditional Nordic conception with the subdivisions 1, 1A, 2 and 3.

In the proposed new European Standard (prEN 13763-1) the denomination is Class with subdivisions 1,

2, 3, 4. In this manual the denomination Group will be used.

Nordic denomination Older denomination European denomination

Group 1 (Type A/S/NT) Class 1

Group 1A (Type U) Class 2

Group 2 (Type VA) Class 3

Group 3 (Type HU/XS) Class 4

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Group 1 detonator (type A/S/NT)Group 1 detonator (called NT-detonator by Dyno

Nobel) is a conventional electric detonator.

The no re current is < 0.25 A.

A minimum of 0.6 A ring current is required to

initiate one Group 1 detonator and a minimum of 1.0

A is required to reliably initiate a series of Group 1

detonators.

Group 1A detonator (type U)

Group 1A detonators are somewhat safer in hazard-

ous situations than Group 1 detonators.

The no re current is < 0.45 A.

A minimum of 1.0 A ring current is required to

re one Group 1A detonator and a minimum of

1.5 A is required to initiate a series of Group 1A

detonators.


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Group 2 detonator (type VA)

Group 2 detonators are detonators with a high

degree of safety. Even though VA detonators are

much safer in the presence of electrical hazards

than Group 1 detonators, safety precautions must

still be taken close to strong radio transmitters,

radar, powerlines over 70 kV and during thunder-storms.

No re current is < 1.2 A.

A minimum of 2.2 A is required to re one VA

detonator and a minimum of 3.5 A is required to

re a series of VA detonators.

The resistance of VA detonators is independent of

legwire length and is 3.6 +0.3 at + 20 C.

Note that the resistance depends on the tempera-

ture and decreases when the temperature falls.

The legwires can be of different material (iron,

brass or copper) depending on legwire length.

Therefore the temperature dependence is different

for different legwire lengths.

Group 3 detonator (type HU/XS)

The HU/XS detonator is a detonator with a very

high degree of safety against electric hazards.

No re current is < 4.0 A.

A minimum of 6.0 A is required to re one Group 3

detonator and a minimum of 25 A is required to re a

series of Group 3 detonators.

Dyno Nobels Group 3 detonators are not

included in the CE certication according

to directive 93/15/EEG and may therefore

not be sold within EU without special per-

mission. These products are included in

this manual only for information and for

markets outside EU as well as for custom-

ers with requisite permits.


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Color coding of electric detonators.

Electric detonators are color coded by different

colors on the legwires. Common for all groups is

that one of MS-(millisecond) detonators legwires

is green and one of the HS-(halfsecond) detonators

legwires is red. The instantaneous detonator has

one white legwire.

Group 1 Legwire colors

NT-instantaneous Yellow/white

NT-MS Yellow/green

NT-HS* yellow/red

Group 1A

U-instantaneous Red/white

U-MS Red/green

U-HS* Red/red

Group 2

VA-instantaneous Grey/white

VA-MS Grey/green

VA-HS* Grey/red

Group 3*

XS/HU-instantaneous Blue/white

XS/HU-MS Blue/green

XS/HU-HS Blue/red

* NOTE that Dyno Nobels HS-detonators and

Group 3 detonators are not certied under EUdirective 93/15/EEG.

The above color code is the code used by

Dyno Nobel Europe and based on interna-

tional practice. That does not mean that all

manufacturers follow this practice.

NEVER USE DETONATORS FROM DIFFERENT GROUPS IN THE SAME ROUND. IT

WILL MOST PROBABLY CAUSE MISFIRES AS THE DIFFERENT GROUPS HAVE DIF-

FERENT ELECTRICAL PROPERTIES. FOR THE SAME REASON DETONATORS FROMDIFFERENT MANUFACTURERS MUST NOT BE USED IN THE SAME ROUND.


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Marking on the detonators shell.Dyno Nobels detonators are marked with the

delay time. Therefore it is possible to deduce

which period number a detonator has even though

the identication tape has disappeared during the

charging operation. For example, the marking 500

ms shows that it is an MS detonator No. 20. If itstates 25 ms is it a MS detonator No.1

OD-detonator.For underwater blasting and other operations

where the detonators are exposed to high pres-

sures Dyno Nobel manufactures detonators with

reinforced legwires and double detonator shells.

All detonators from Dyno Nobel can be made in

OD version.

Joining detonators in a round.When connecting a round, it is important that bare

legwires or joints do not come into contact with earth

or with each other. In contact with earth, the initia-

tion current may leak into the earth and only a part

of the round may re. If joints come in contact with

each other the initiation current may take a shortcut

with the same consequences.

For this reason all detonators manufactured by Dyno

Nobel are tted with a connecting sleeve xed to

one of the legwires. For transport the other legwireis loosely inserted into the connecting sleeve. When

connecting the circuit the end of the wire with no

insulation from one detonator is inserted into the

connecting sleeve of the next. The connecting

sleeve is twisted 5 - 6 turns and a good connection

is obtained.

For electric detonators that are not supplied with

connecting sleeves there are available grease lled

connecting sleeves are available. These connecting

sleeves are especially useful in wet operations.

All detonators manufactured by Dyno

Nobel Europe are fitted with connecting

sleeves as standard.


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Dyno Nobel manufactures three series of electric detonators:

- MS-series

- Extended MS-series

- HS-series

MS series detonators are intended use in bench and trench blasting.

The extended MS-series detonators are used in underground operations and bench blasting with largeburdens (8 - 10 m).

HS-series detonators are intended only for underground blastings.

Delay times:

MS-series:

No. 0 Instantaneous No. 11 275 msNo. 1 25 ms No. 12 300 msNo. 2 50 ms No. 13 325 msNo. 3 75 ms No. 14 350 ms

No. 4 100 ms No. 15 375 msNo. 5 125 ms No. 16 400 msNo. 6 150 ms No. 17 425 msNo. 7 175 ms No. 18 450 msNo. 8 200 ms No. 19 475 msNo. 9 225 ms No. 20 500 msNo. 10 250 ms

The extended MS-series is a continuation of the MS-series. In underground operations the longer delay

times can be useful.

Extended MS-series:

No. 24 600 ms No. 48 1200 msNo. 28 700 ms No. 56 1400 msNo. 32 800 ms No. 64 1600 msNo. 36 900 ms No. 72 1800 msNo. 40 1000 ms No. 80 2000 msNo. 44 1100 ms

HS-series*:

No. 0 25 ms

No. 1 500 msNo. 2 1000 msNo. 3 1500 msNo. 4 2000 msNo. 5 2500 msNo. 6 3000 msNo. 7 3500 msNo. 8 4000 msNo. 9 4500 msNo. 10 5000 ms

* HS-series are not CE certied under directive 93/15/EEG,


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Testing and ring the round.The measuring instruments and blasting machines

that are used for the testing and ring of electric

rounds must be approved SP* for use in Sweden.

The use of batteries or power from mains is

strictly prohibited.

Capacitor blasting machines have proved to be very

reliable even under severe working conditions. The

introduction of Group 2 and Group 3 detonators

with high in-built safety increased the demand for

blasting machines with high capacity.

The blasting machines CB 20 VA and CI 160 VA

are approved according to Swedish Standard SS

499 07 10 and are CE certified in accordance

with EMC and LVD directives.

Consult the Users Manual each time this

symbol is used for an explanation of the

potential risk and what measures to take to elimi-

nate (avoid) the risk.

* Sveriges Provnings- och Forskningsinstitut.

10


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Electric detonator rounds may be connected in

series, in parallel or in a combination of series and

parallel connections. Which method of connection

is used depends on the size of the rounds and the

blasting machine available.

When a ring circuit is connected in series the

measuring procedure is simple. Just multiply the

number of detonators by the resistance of one deto-

nator. The measured value should be the same as

the theoretical calculation.

When the ring circuit is connected in series/

parallel the connection procedure is somewhat

more complicated.

Each series in the round must be of the same size

and the resistance of each series must not vary by

more than 5% between highest and lowest value.It is best if all series contain the same number of

detonators.

When the series are con-

nected in parallel the

resistance becomes lower

as the area through which

the ring current is to go

through increases. If we

have two series the area is

doubled and the resistance

is half of that of one series.With 3 series connected in

parallel the resistance will

be one third and so on.

Resistance after connection in parallel =

In the top example there are 18 VA detonators con-

nected in one series.

The resistance is then 18 x 3.6 = 65.

In the lower example there are 30 VA detonators

connected in 2 series. The resistance in each series

is 15x3.6 = 54 .

The resistance of the round connected in parallel is

then 54/2 = 27.

Note that the resistance of the firing cable is

Testing electric circuits.

Connection in series

Resistance/series

Number of series

Connection in series/parallel

11


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Electric resistance for the different detonators groups.

Refers to the total resistance in inclusive of legwires and detonator at +20o C.

Legwire Group 1* Group 1A* Group 2* Group3

length m A/S/NT U VA HU/XS

2 1.4 2.3 3.6 -3 1.5 2.3 3.6 0.13

4 1.6 2.9 3.6 0.55

6 1.9 4.0 3.6 0.79

8 2.1 - - -

10 2.4 1.9 3.6 1.3

15 3.0 2.5 - -

16 - - 3.6 2.0

20 3.6 3.1 - -

24 - - 3.6 2.9

25 4.2 3.7 - -

35 - - 3.6 4.2

12

* The tolerance of the detonator resistance is +0.3.

For further information about electric properties see page 26 Data sheet.


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Technical data for RIM2Range of resistance (R-measurement): 0-1999

(I-measurement): 0-19kMeasuring current: 1 mAWorking temperature : -25 C till +55 CSize (l x b x h): 245 x 65 x 75 mmWeight : 0.45 kgBattery: 1 pc 9 V battery 6F22

The displayed value is automatically rounded off to

the accuracy needed in practical blasting work.

RIM2 has an in-built resistor for the selftest func-tion. RIM2 is tested by pressing the green button.

The instrument is powered by a 9V battery and dis-

plays when it is time for a replacement battery to be

tted.

When blasting with heavy covering material it is

good practice to test the circuit after the placement

of each mat. In that way discontinuities in the circuit

are discovered quickly and can be corrected.

RIM2 is a future product and thus not yet approved

by the authorities.

* Sveriges Provnings- och Forskningsinstitut

Resistance and insulation meter RIM2.

(Not on the market, not yet approved)

Test instruments used to check electric rounds

must be approved by SP for use in Sweden. The

use of electricians resistance meter is strictly for-bidden as the measuring current is far too high.

RIM2 is a combination instrument for measurement

of the resistance in individual detonator, detonators

connected in series and rounds connected in series/

parallel as well as measurement of leakage to earth

through insulation faults.

The test instrument RIM2 is digital and starts and

selects measuring range automatically, the blaster

only needs to connect the round (or part of the

round) to the terminals of the instrument and read

the result.

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Connect to terminals as shown on sketch.The instrument starts automatically if the

insulation resistance is less than 30 k.

The insulation value is dispalyed in k (1 k

= 1000).

The round can be red only at the following

insulation values.

If the resistance of the round is less than 100 :

Insulation value must be at least 400 (0.4 k).

If the resistance of the round is over 100 :

The insulation value must be at least four

times the resistance of the round.

Note! Do not use the instruments resistance

function for measuring the insulation as an

earth fault may not be detected.

Connect to terminals as shown on sketch.

The instrument starts automatically at a resis-

tance less than 30 k.

The resistance is displayed in .

NOTE! Do not use the instruments isolationmeasuring function for resistance measure-

ment as the result then will be faulty due

to the inuence of capacitance between the

object being measured and earth.

Measuring with RIM2.

Measuring of resistance and insulation must be done separately.

If displayed value does not stabilize, i.e uctuates more than than one unit in the last gure, the instru-

ment is either faulty or the measurement affected by external interference. Such interference may come

from powerlines, radio transmitters or similar.

The instrument must not be used until the cause of the faulty reading is identied and taken care of.

MEASUREMENT OF RESISTANCE

INSULATION MEASUREMENT


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Technical data for CB 20 VACapacity, max. number of detonators: See tables on page 16Max. resistance of the round : 77 ohmCharging time: approx. 15 sec.Capacitance: 200 FFiring current: 540 VWorking temperature: -25 C till +55 C

Weight : 0.65 kgSize (l x w x h): 245 x 65 x 75 mm

Blasting machine CB 20 VA.

The CB 20 VA is a capacitor blasting machine

designed for initiation of up to 20 VA detonators

connected in one series with a ring cable that has

a maximum resistance of 5. The blasting machine

is battery powered and requires a two handed oper-

ation to avoid unintendedl initiation of the round.

CB 20 VA is delivered with rechargeable batteries

that are located in the handle. The batteries are

charged by connecting the terminals of the blasting

machine to a DC source of 12 or 14 V, i.e. the ciga-

rette lighter outlet in a car or to a battery charger.

15

In case of emergency the rechargeable batteries can be

replaced by ordinary batteries. (Do not try to recharge

ordinary batteries).

The control panel of the blasting machine has three

lamps that indicate:

1. If the batteries are sufciently charged.

2. That the resistance in one series is within the

capacity of the blasting machine.

3. That the capacitor is charged and ready for initia-

tion.


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Operating instructions for blasting machines CB 20 VA and CB 400 NT.

There is a variant of CB 20 VA which is adapted to Group 1 and 1A detonators called CB 400 NT. Note thatCB 400 NT is not approved for use in Sweden but comply with the standards in LVD and EMC directives.GeneralCB 20 VA is a capacitor blasting machine designed for the initiation of 20 Group2/VA detonators in oneseries alternatively 120 Group lA detonators in 3 series with a ring cables resistance of 5 .

The ring machine requires a two handed operation to avoid unintended initiation of the round. Within-built test functions the charge level of the batteries may be checked as well as if the resistance of theround is within the blasting machines capacity.The blasting machine must not be used as circuit tester for the round.Thr blasting machine is powered by built-in batteries. As standard CB 20 VA and CB 400 NT are deliv-ered with rechargeable NiCd batteries.

The capacity of CB 20 VA and CB 400 NT for different types of detonators.For the types of detonators that have different resistance among themselves, also the total permitted

resistance is stated.

Group 1 (type A/S/NT)

Group 1A (type U)

Grupp 2 (typ VA)

Group 3 (HU/XS)

The electric detonators in the round must allbe of the same type and the lowest period

number must be No.1Instantaneous detonators must not be used in rounds connected in series as they may break the

ring circuit too early.16

Numberof parallel

series

1

2

3

4

Number ofdetonators

per series

170

140

120

100

Totalnumber of

detonators

170

280

360

400

Maximumresistance

per series,

425

350

300

250

Number of

detonators

per series

70

50

40

Total

number of

detonators

70

100

120

Number

of parallel

series

1

2

3

Maximum

resistance

per series,

245

175

140

Number

of parallel

series

1

Number of

detonators

per series

20

Total

number of

detonators

20

Maximum

resistance

per series,

72

Group 1, A/S/NT detonators.CB 400 NT can initiate up to 170 detonators in oneseries and 400 in 4 parallel series. In the table on theleft the following data has been used:Firing current < 1 A, ring impulse < 5 mWs/.The resistance of each detonator is assumed to be 2.5 and the ring cable resistance to be 5 .The resistance of Group 1 detonators depends on thelegwire length.

Group 1A, U detonators.When calculating the ring capacity of CB 400 NT thefollowing data has been used:Firing current < 1.5 A, ring impulse < 16 mWs/.The resistance of each detonator is assumed to be 3.5 and the ring cable resistance to be 5 .The resistance of Group 1A detonators depends on thelegwire length.

Group 2, VA detonators.CB 20 VA/CB 400 NT can initiate up to 20 detonators. Inthe table on the left the following data has been used:Firing current < 3.5 A, ring impulse < 140 mWs/.The resistance of each detonator is assumed to be 3.5 and the ring cable resistance to be 5 .The resistance of Group 2 detonators is independent

of legwire length.Group 3, HU/XS detonatorsCB 400 NT can initiate up to 3 HU/XS detonatorsIn the table on the left, the following data have beenused:Firing current < 25 A, ring impulse < 2500 mWs/.The resistance of each detonator is assumed to 0.6 and the ring cable resistance 5 . HU/XS detonatorsare connected only in a single series circuit.The resistance of Group 3 detonators depends on thelegwire length.

Number

of parallel

series

1

1

1

Number of

detonators

per series

3

2

1

Maximum

resistance

per series,

1.8

1.8

1.8

Legwire

length, m

4

6

10


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Repair

Any repair to the blasting machine must be made by a person who has knowledge and experience of the

electrical, mechanical and safety requirements (standards) that applies to the machine.

If the machine has been opened up it is of utmost importance that the sealing is made correctly when

re-assambling.

Battery testing

Press the RED button TESTING. The lamp BATT shall light up. If the lamp does not light up, the batteriesmust be recharged at the earliest opportunity, or if dry cell batteries are used they should be replaced.

NOTE! If the lamp BATT does not light up or if it goes out during the charging operation, the machine

can be used only if the lamp CHARGE lights up within 30 sec after the green button CHARGINGbeing

pressed.

The normal charging time to reach ring voltage is approx. 15 sec.

If the lamp CHARGE does not light up within 30 sec after the green button CHARGINGbeing pressed,

the batteries must be recharged (or replaced) before the machine is used.

Charging the batteries

The batteriesare charged by connecting the blasting machine to 12 -14 V DC, e.g. a car battery. Observe

the polarity according to the marking on the terminals of the blasting machine.

The green lamp BATT lights up to indicate that the batteries are being charged. The charging time fordepleted batteries is approx. 14 hours.

Replacement of batteries

Replacement of batteries, battery pack or battery holder is made by unscrewing the battery cover on the

handle of the blasting machine.

When changing rechargable Ni-MH, 4.8 V and 12 mAh, battery pack or to holder for dry cell the con-

necting cables must be detached from the old battery pack and soldered to the new pack or battery holder.

If dry cell are used instead of rechargable NiCd batteries they must be of Alkaline type and placed in the

battery holder according to instruction in the holder. Note! Do not recharge dry cell batteries.

Instruction

DANGEROUS VOLTAGE! Do not touch the terminals and ring cable when ring.

Max. volatage 550 V.

Firing

l. First step: Evacuate the danger zone.

2. Connect the ring cable to the terminals by introducing the cables both ends into the holes on

top of the blasting machine at the same time as the terminals buttons are kept depressed.

3. Press the red button TESTING

The lamp ROUND shall light up and remain lit as long as the button is depressed.Also the lamp BATT lights up.

4. If the lamp ROUND lights up when the button is depressed and thereafter goes out, the resistance

of the round is too high and no ring should be attempted as a misre most probably will follow.

5. If the round test is satisfactory: release the button TESTING.

Press the green button CHARGING and keep it pressed until the lamp CHARGE lights up.

Charging time is appox. 15 sec.

6. FIRE the round by pressing the RED button FIRING while the green charging button is kept

depressed.

7. Disconnect the ring cable.

17


22/36

Technical data for CI 160 VA.Capacity, max. number of detonators: 160 (type VA). Also see table on page 19Max, ring current: 1950 VCapacitance: 105 FWorking temperature: -25 C till +55 C

Operations:- charging hand crank- ring press buttons/two hand maneuvered

Weight: 14.3 kgSize (l x w x h): 290 x 260 x 420 mm

Firing machine CI 160 VA.

CI 160 VA is a capacitor blasting machine for the

safe and reliable initiation of up to 160 Group 2

(VA) detonators connected in 4 parallel series and

a ring cable resistance not exceeding 2.5 . The

blasting machine can also be used for Group 1,

Group 1A and Group 3 detonators. Tables for the

blasting machines capacity for those Groups are

presented on the next page. CI 160 VA is charged

up by the means of a hand cranked generator. The

18

maximum voltage (1950 V) is reached after approx.

20 sec. The charging level is shown on a meter

which is divided in 4 zones (I - IV). The required

charge level for a given size of the round is indi-

cated on a plate on the blasting machine. Thus the

ring current may be adapted to the number of det-

onators in the round, and the machines maximum

ring current is used only when necessary


23/36

The capacity of CI 160 VA for different types of detonators.

For the types of detonators that have different resistance among themselves, also the total permitted

resistance is stated.

Number of detonators that can be initiated by CI 160 VA.

Number

of parallel

series

1

2

1

2

2

Number of

detonators

per series

1-145

50-100

146-300

101-250

251-400

Total

number of

detonators

1-145

100-200

146-300

202-500

Maximum

resistance per

series,

2.5-363

125-250

365-750

252-625

627-1000

Group 1 A (type U)

Charge

level

I

I

II

II

III

Number

of parallel

series

1

2

1

2

2

Number of

detonators

per series

1-60

20-40

61-135

41-100

101-150

Total

number of

detonators

60

40-80

61-135

82-200

202-300

Maximum

resistance

per series,

3.5-210

70-140

213-470

143-350

353-525

Group 2 (type VA)

Charge

level

I

II

III

III

IV

IV

IV

IV

Number

of parallel

series

1

1

1

2

1

2

3

4

Number of

detonators per

series

1-10

11-40

41-70

21-45

71-100

46-70

31-50

30-40

Total number

of detonators

1-10

11-40

41-70

42-90

71-100

92-140

93-150

120-160

Group 3 (type HU/XS)

Charge

level

II

III

IV

Number

of parallel

series

1

1

1

Number of

detonators per

series

1-12

12-25

25-50

Maximum

resistance

per series,

0.6-7

7-15

15-30

Group 1, A/S/NT detonators

CI 160 VA initiates between 1 and 145 detona-

tors in one series at charge level I. In the tableonthe left, the following data have been used:

Firing current < 1 A, ring impulse < 5 mWs/.

Each detonators resistance is assumed to be 2.5

and the ring cable resistance 5 .

The resistance of Group 1 detonators dependson the legwire length.

Group 1A, U detonatorsWhen calculating the ring capacity of CI 160 VA,the following data have been used:

Firing current < 1.5 A, each detonators resis-

tance is assumed to be 3.5 , ring impulse

Documents

User`s Manual Eletric Initiation