PROBA 50 - VDH Products B.V.The PROBA 50 is also able to control the application of gas during the ripening program. The duration of the gasification is adjustable. During this period

User Manual PROBA 50 - English Doc.no.: 951573Version: V1.3

Software: 000498 PROBA50 Version: V1.05File: DO951573.HND

By: AAD Date: 07-03-2012

VDH Products BV - Roden - Holland Signed: Pages: 26

PROBA 50User manual

(Wall- and Panel-mounting)

VDH Products BV Document 951573 - Version 1.3 Blad: 2 of 26

Disclaimer

The information contained in this document is assumed to be accurate. However VDH Products BV accepts no liability foreventual mistakes or errors and has the right to change this document without notice.

Copyright Notice

Copyright 1995 VDH Products BV, Roden The Netherlands.No part of this document may be reproduced without the prior written permission of VDH Products BV.

Trademarks

'PROBA' is a trademark of VDH Products BV.

Edition

3st edition, March 2012

It is highly recommended to study the operationof the PROBA ripening system carefully beforeusing it.


Table of contents

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41.1 Setup of the PROBA ripening system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41.2 Operation of the PROBA ripening system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41.3 Method of temperature control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 The PROBA 50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52.1 Control of the PROBA 50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.1.1 Switching the PROBA 50 ON and OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52.1.2 Readout temperature, clock, sensors and setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62.1.3 Programming and starting a ripening program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62.1.4 Stopping a ripening program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.1.5 Changing the temperature setpoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.1.6 Standby . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.1.7 Starting and stopping the gassing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.1.8 Starting and stopping the ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102.1.9 Stepping a program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112.1.10 Heating on/off switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112.1.11 Switching sensors on/off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.2 Adjustment of the PROBA50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.3 Regulation characteristics of the PROBA 50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142.4 Alarms and warnings of the PROBA 50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152.5 Error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3 Datalogger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Appendix A (Error messages) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Appendix B (Internal Parameters) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Appendix C (Technical Specifications) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Appendix D (Frontview PROBA50) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Appendix E (Connection diagram PROBA50) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Appendix F (Dimensions PROBA50) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25


1 Introduction

1.1 Setup of the PROBA ripening system

The PROBA 50 Ripening System provides a solution for the automated ripening of bananas. The system measuresand controls independently the temperature in the ripening room. Ventilation of the bananas is also controlled by thesystem.

During a period of several days the system is capable of controlling one or more ripening rooms in such a way thatthe fruit can be removed perfectly ripened from the rooms at the end of the ripening cycle.

The ripening room is fully controlled by the PROBA 50 computer. This steps through a ripening programindependently and can be controlled by the user via the front panel.

1.2 Operation of the PROBA ripening system

Bananas in the ripening room are ripened by means of ripening programs. In the PROBA ripening system the lengthof these programs and the temperatures are adjusted each day. The ripener can make a choice from 10 differentripening programs in each PROBA 50.

The course of the temperature is setup by means of temperature setpoints, one for each day. During the execution ofthe program the temperature is checked and controlled by the PROBA 50 in such a way that the fruit is ripenedaccording to the requirements of the user.

The PROBA 50 is also able to control the application of gas during the ripening program. The duration of thegasification is adjustable. During this period the PROBA 50 will indicate that gas is present in the ripening room.

During the ripening process the bananas can be ventilated. The length and interval of the ventilation are adjustable.During gassing periods the ventilation is blocked. The PROBA 50 indicates when the room is being ventilated.

At the end of a ripening program the PROBA 50 switches over to the so-called STANDBY mode. The temperatureregulation continues on the STANDBY setpoint which ensures that the ripened product remains in a controlledenvironment.

At any moment during the ripening program the temperature setpoint, which is used by the PROBA 50 at thatmoment, can be changed (when the LED above the KEY button is on). The ripening program can also be changedinto STANDBY mode or stopped anytime by the user.

A ripening program can be displayed schematically as follows:

During a number of days (the length of the program, in this case is 4) a temperature setpoint is entered for each day.On a given day, the PROBA 50 regulates the temperature in the ripening room to be equal or close to that particularvalue. The length of a ripening program can be varied from 4 to 8 days (fixed length program numbers 1 to 5) or from1 to 9 days (the length of the programs 6 to 10 are fully adjustable).

After setting up and starting a program the PROBA 50 starts at day 1. In the example the temperature setpoint isnow 18.0C, so the PROBA 50 regulates the temperature to become 18.0C. At the end of each day (24 hours) thetemperature setpoint is changed into that of the next day of the program. After all days of the program are past, thePROBA 50 goes to the STANDBY mode. The STANDBY temperature is also adjusted in the ripening program. TheSTANDBY mode remains active until the user stops the ripening program or starts a new one.

Finally a warming-up phase can take place before the ripening program starts. For convenience this precursion timeis called day 0. The length of precursion time is variable.


1.3 Method of temperature control

Up to four temperature sensors can be connected to the PROBA 50.It makes use of three product sensors which are placed in the boxes with the bananas (pulp temperature). These arethe product sensors type SM8500 which are connected via the coiled leads to the connection boxes. Thetemperature is controlled on the average of the present and active product sensors.

In addition, an air temperature alarm sensor, type SM8000/2m, can be connected. This sensor controls the minimumand maximum temperature of the airflow coming out of the evaporator. The evaporator can be temporarily switchedoff if the alarm levels are exceeded.

Via a setting in the internal parameters the method of control can be selected, at which product sensor 3 is replacedby an air temperature sensor type SM800/2m. During the warming-up phase (day 0) the temperature is controlled bysensor 3. When the warming-up phase is passed, the temperature is controlled on the average of sensor 1 and 2.

2 The PROBA 50

2.1 Control of the PROBA 50

The control computer PROBA 50 can be controlled fully via its front panel and has a number of control and displayfeatures:

* Push buttons,* Displays,* LED's.

The control can be distinguished in:

* Readout of the sensor values,* Change of setpoint(s),* Programming and starting of regulation,* Programming of control parameters and alarms.

Function of the LED's:

M 1 Indicates if sensor 1 is active. Flashes if sensor 1 is read-out.




ALARM Lights in case of an error.

COOL Displays if the cooling is switched on.

HEAT Displays if the heating is switched on.

GAS Lights constantly if gas flows into the ripening room. Flashes if gas is present in theripening room.

VENT Lights during ventilation of the ripening room.

In general a flashing LED means that a function is active.

2.1.1 Switching the PROBA 50 ON and OFF

By pressing the ON/OFF key the PROBA 50 is switched on or off.If the PROBA 50 is switched off, the control will stop immediately.

If the PROBA 50 is switched on, all settings can be displayed.

To change settings, a 4-digit security has to be entered.

Press the KEY button. The display shows the text 'Code'. By use ofcombination of keys on the bottom row a code can be entered.

If the code is correct, the LED above the KEY button will light and settings canbe changed. The lock is open.

By pressing the KEY button again, the LED above the KEY button willextinguish and it is not possoble to change the settings. The lock is closed.


2.1.2 Readout temperature, clock, sensors and setpoints

The display in the top left shows the temperature in the ripening room. Thistemperature is the average of the sensors 1, 2 and 3 (if these are active).

The display in the bottom left shows the present temperature setpoint.

The display in the top right shows the program clock, which indicates how longthe program has run in the present day. In this example 15 hours and 24minutes.

The display in the bottom right shows the length and present day of theprogram. In this example a 5 day program, which is now in day 3.

Press the PROG key. The LED above the key starts flashing. When aprogram is in progress, the number of that program is shown in the display. Bypressing the PROG key once more, the average temperature is shown againin the display. The LED above the PROG key will extinguish.

Press the SENS key. The LED above the key starts flashing indicating thatthis function is active. The temperature of the first sensor is shown. Press theSENS key again and the temperature of the next sensor is shown.

All present sensors are shown, also the non active sensors.

After the temperatures there is an indication if the heating can switch on(HEAT ON) or not (HEAT OFF).

After the measured values of all sensors have been displayed, pressing theSENS key once again will bring the PROBA 50 back into its normal workingcondition. The SENS-LED goes off and the average temperature is shownagain in the display.

The PROBA 50 will switch to the normal working condition if within 30seconds no key is touched.

2.1.3 Programming and starting a ripening program

Make sure that the LED above the KEY button is on, so that changes areallowed.

Press the PROG key. The LED above this key starts flashing to indicateprogramming is in progress.

In the temperature display the program number flashes. The length of theprogram is shown in the DAY display.

The ripening program number (here number 3) can be changed by means ofthe UP and DOWN keys.

By pressing the SET key the selected number is accepted.

The number of days of programs 1 to 5 is fixed (4 days with program number1 and soon to 8 days with program number 5).If one of the programs 6 to 10 is selected, the number of days can be selectedin addition to temperature.


The number of days of this program can now be selected and is shown in theDAY display. The length can vary from 1 to 9 days.

With the UP and DOWN keys the length of the program can be changed.

Acknowledge the number of days with the SET key.

From this point on setting up of programs 6 to 10 is the same as setting upprograms 1 to 5.

During the first day of the ripening program the fruit can be gassed. With theUP and DOWN keys the user can select gasification ('G. on') or no gasification('G.oFF'). The GAS LED also flashes.

Press the SET key if the setting is right.

Ventilation of the ripening rooms can now be adjusted. The VENT LEDflashes.The ventilation time and the frequency of the ventilation can be set in theInternal Adjustments.

During the gasification period ventilation is blocked. As soon as thegasification period is ended, ventilation starts immediately.

Change the adjustment with the UP and DOWN keys.

Acknowledge selection with the SET key.

The setting of the temperatures of the ripening program now follow. For everyday a temperature can be selected.The DAY display indicates which day isbeing set, while the temperature display shows the desired value (setpoint).

The value can be changed with the UP and DOWN keys.

When the value is correct, press the SET key.

Repeat the last steps for all days of the ripening program.

The STANDBY temperature (setpoint after finishing the actual ripening) is setwhile the STANDBY LED lights. Changing of this value is done in the samemanner as adjustment of other setpoints (UP and DOWN keys and the SETkey).

Finally a delay time can be set before the actual ripening program starts. Thisperiod is called day 0. Therefore the 0 lights in the DAY display.By pressing the UP and DOWN keys and the SET key a delay time in hourscan be set.If the delay time is 0 hours, the program will start directly.

When a delay time of more than 0 hours is programmed, the temperaturesetpoint for day 0 can be adjusted with the UP and DOWN keys andacknowledged with the SET key.


By pressing the SET key for the last time, the ripening program will start. ThePROG LED lights to indicate that the ripening program is in progress and thefruit is being ripened.

Please note:

During day 0 the PROBA 50 will, if selected, start with ventilation and regulatethe temperature. If the delay time is finished, the ripening program will step today 1 and continue the program.The program clock will count down to 00.00 hours in day 0. The programsteps to day 1 and the clock will count from 00.00 hours.

While programming programs 1 to 5, the PROBA 50 will use the pre-programmed ripening programs as default.

While programming programs 6 to 10, the PROBA 50 will use thetemperatures of the last ripening program used.

If ripening programs 6 to 10 are adjusted during programming or during theripening process, these changed values are default settings for the next timethe program is used.

Programming can be interupted at any time by pressing the PROG key. ThePROG LED will stop flashing and programming will not have any effect.

If during programming no key has been pressed for more than 30 seconds,programming will be interrupted and changes are not made.

2.1.4 Stopping a ripening program

Make sure the LED above the KEY button is on.

By pressing the STANDBY key, the program is forced into the STANDBYmode. The STANDBY LED above this key lights.

Because of this the ripening program will regulate for unlimited time on theSTANDBY temperature setpoint. If selected, the ventilation times will be takeninto account. The PROG LED does not light anymore.

By pressing the STANDBY key once more, the STANDBY mode is switchedoff and the PROBA 50 stops regulating.

The temperature regulation stops, the ripening room will not be kept on aconstant temperature. Also the STANDBY LED does not light anymore.

2.1.5 Changing the temperature setpoint

To allow the ripener to adapt the ripening program whilst it is running, it ispossible to change the setpoint of the current day. This is only possible whenthe PROG or the STANDBY LED are lit, which shows that the PROBA 50 isregulating.


Press the SETPOINT key. The present temperature setpoint starts to flash.

The value can be changed with the UP and DOWN keys.

Press the SET key to acknowlegde the adjustment.

The temperature setpoint of one of the other days can also be changed.

Press the SETPOINT key so that the present temperature setpoint flashes.


By simultaneously pressing the DAY-key and the UP- or DOWN-key, another day can be selected. The setpoint for this day willappear in the setpoint display.

Using the UP- and DOWN-keys the setpoint can be changed.

Press the SETPOINT-key to exit the setting.

2.1.6 Standby

In the STANDBY mode the PROBA 50 will regulate for unlimited time on afixed setpoint temperature in the ripening room.

This STANDBY mode for example can be used if products other thanbananas are stored in the ripening room.


Press the STANDBY key to switch to the STANDBY mode. The LED abovethe STANDBY key will light.Now the temperature will be regulated for an unlimited time on the lastprogrammed STANDBY setpoint.

The setpoint can be adjusted as described in chapter '2.1.5. Changing thetemperature setpoint' (see page 8).

By pressing the STANDBY key once more, the STANDBY mode is switchedoff.

The temperature regulation will stop, the ripening room will not be kept at aconstant temperature. Also the STANDBY LED will not illuminated.

2.1.7 Starting and stopping the gassing

It is possible to stop the gasification during a gassing period.


Press the GAS key.

The display shows the text 'GAS' and 'StOP'.

If gasification is not to be stopped, press the GAS key. The averagetemperature shows in the display again.

Press the SET key to stop the gasification period. The LED GAS willextinguish to indicate that gasification has stopped.

During the ripening program it is possible to insert (once again) a gassingperiod.


Press the GAS key.

The display shows the text 'GAS' and 'on'.

If gasification is not to be started, press the GAS key. The averagetemperature shows in the display again.

Press the SET key to start the gasification period. The LED GAS will light toindicate that gasification is active.

2.1.8 Starting and stopping the ventilation

If there is ventilation, this can be stopped in the following manner.


Press the VENT key.

The display shows the text 'VENt' and 'StOP'.

If ventilation is not to be stopped, press the VENT key once more.

Press the SET key to stop ventilation. The VENT LED will extinguishindicating that ventilation has stopped.

If there is no ventilation, this can be started.

Press the VENT key.

The display shows the text 'VENt' and ' on'.

Press the VENT key once more if ventilation is not to be started.


Press the SET key to start ventilation. The VENT LED will light to indicate thatventilation is active.When the ventilation is actived in this manner, the system will commands acycle which is pre-programmed into the Interal Settings, e.g. 20 minutes every12 hours (if the gas cycle is activated, ventilation will stop and then continuesautomatically after gassing).

2.1.9 Stepping a program

During the course of a ripening program, it is possible to change the programclock or the day in which the PROBA 50 is running. We call this 'Stepping' aprogram. With this 'Stepping' the length of a program can be made shorter bystepping forward or longer by stepping back.


Press the TIME key. The program clock flashes.

The time can be changed using the UP and DOWN keys.

Press the TIME key to confirm the new setting.

Press the DAY key. The day number flashes.

The day number can be changed using the UP and DOWN keys.

Press the DAY key to confirm the selected day.

Please note:

It is not possible to step from a program to STANDBY. This is only possible bypressing the STANDBY key.

Nor is it possible to step from STANDBY back into a program.

2.1.10 Heating on/off switch

The PROBA 50 offers the option to switch off the heating. During temperaturecontrol there will only be cooling. If the temperature is lower than the setpoint,the heating will not switch on.

Make sure the LED above the KEY button is on, so that changes are allowed.

Press the SENS-key until the text 'HEAT ON' or 'HEAT OFF' appears in thedisplay.

Press the SET key to change from ON to OFF or reverse.

Press the SENS key once more, so that the average value of the temperaturesensors appears in the display again.


2.1.11 Switching sensors on/off

The user has the possibility to switch present sensors on or off.

Sensors which are switched on will be used for the regulation, sensors whichare switched off not. This can be useful e.g. if one of the sensors should notbe used for calculation of the temperature. Also a sensor which does notmeasure correctly can be switched off. Illuminated LED's indicate whichtemperature sensors are active.

Make sure the LED above the KEY button is on, so that changes are possible.

Press the SENS key and then the PROG key. The LED's above these keysstart flashing to indicate that this function is active.

The display shows 'S1.on'. The flashing number (in this case '1'), indicates thenumber of the first sensor.

Select a sensor with the UP and DOWN keys. The display shows whether thesensor is ON or OFF:'on' if it is switched on,'OF' if it is switched off.

By pressing the SET key the status of the sensor can be changed from ON toOFF or vice versa.

With the UP and DOWN keys all present temperature sensors can beswitched ON or OFF in this way.

Finish switching sensors on/off by pressing the SENS key.

Please note:

If only one temperature sensor is switched on, the PROBA 50 does not allowthe user to switch this sensor off. If this sensor needs to be switched off, theuser needs to switch another sensor on first.


2.2 Adjustment of the PROBA50

The PROBA 50 regulates and detects failures, dependant upon a number ofparameters which can be set by the installer or the user:

* regulation characteristics* alarms/warnings* default ripening programs* gassing and ventilation

Normally these settings do not have to be changed daily. This is why they aremore difficult to access than e.g. the starting or stopping of a ripening programor the changing of a setpoint.We call changing of these settings we call 'Internal Programming'.

The PROBA 50 can be brought into this Internal Programming mode bysimultaneously pressing the SET and KEY buttons. Start by pressing the SETkey; then the KEY key.

Since most of the settings in the Interal Programming affect the regulationcharacterisics of the PROBA 50, all controls are inactive, for as long as thePROBA 50 is in the Internal Programming mode.

In Appendix B all parameters are shown.

The text 'iP--' appears in the display. The horizontal bar moves between thethird and fourth position. Keep both buttons pressed for two seconds and thebar disappears.Release the two keys.

The temperature display shows the text 'P 1'. This is the first parameter. Thevalue of this parameter is shown in the setpoint display.

Use the UP and DOWN keys to choose the various parameters.

By simultaneously pressing the SET key and the UP or DOWN key, the valueof the parameter can be changed.

End the 'Internal Programming' by pressing the PROG button.

If during the Internal Programming no key is pressed for 60 seconds, thePROBA 50 stops programming and returns to it's previous state. The settingswhich were changed will not be stored in the memory.


2.3 Regulation characteristics of the PROBA 50

Description Min. Max. Step

Cooling Differential 0.1°C 20.0°C 0.1°C

Cooling Offset -20.0°C +20.0°C 0.1°C

Heating Differential 0.1°C 20.0°C 0.1°C

Heating Offset -20.0°C +20.0°C 0.1°C

Gas Supply Time 0 min 500 min 1 min

Total Gassing Time 0 hrs 99 hrs 1 hrs

Ventilation Time 0 min 240 min 1 min

Ventilation Interval 1 hrs 24 hrs 1 hrs

The two controls (Cooling and Heating) operate in such a way that the corresponding relays switch off at thesetpoint. If the measured value differs more than the differential (hysterisis) from the setpoint, the relay switches on.This is assuming that for cooling and heating there is no offset.If there is an offset, the effective setpoint (which is used for regulation) shifts with the offset value relative to thesetpoint.

The following values are default values set at the factory:

Adjustment Value

Cooling Differential 0.2°C

Cooling Offset -0.1°C

Heating Differential 0.2°C

Heating Offset -0.6°C

The resulting characteristics of the heating and cooling controls are:

Please note:

When changing differentials and offsets of cooling and heating, the PROBA 50 ensures that no situations arise withwhich it is possible that cooling and heating are switched on at the same time. In case the user tries to change theparameter in this way, the PROBA 50 signals and the faulty adjustment is blocked.


2.4 Alarms and warnings of the PROBA 50

Alarms and warnings are adjustable within the following parameters:

Description Min. Max.

Absolute Maximum Temperature Alarm -10.0°C +40.0°C

Absolute Minimum Temperature Alarm -10.0°C +40.0°C

Delay Relative Temperature Warning 0 min 99 min

Relative Maximum Temperature Warning 0.0°C +40.0°C

Relative Minimum Temperature Warning -40.0°C 0.0°C

Maximum Air Temperature -10.0°C +40.0°C

Minimum Air Temperature -10.0°C +40.0°C

All active temperature sensors are continuously checked for exceeding the absolute temperature limits. If thathappens, a Fatal Alarm will follow.

There are also relative temperature limits. These are linked to the current temperature setpoint. If the setpointchanges, these limits change by the same amount. These alarms can be delayed.

Example: Temperature setpoint = 16.0°C; Relative Maximum Alarm = +4.0°C; The limit of the Relative MaximumAlarm is at 20.0°C. As soon as one of the sensors goes above 20.0°C, a delay timer is started. If the temperatureremains higher than 20.0°C during the set time, a Non Fatal Alarm is triggered.

If sensor 4, the air temperature alarm sensor, is connected and measures a temperature which is above theMaximum Air Temperature Alarm, the heating relay is blocked and released again if the air temperature is below theMaximum Alarm level. If the air temperature is below the Minimum Air Temperature Alarm, the cooling relay isblocked. It is released if the temperature has risen above the Minimum Alarm level.

Changing these parameters is described earlier.

Standard values which are set at the factory are:

Setting Value

Absolute Maximum Temperature +22.0°C

Absolute Minimum Temperature +10.0°C

Delay Relative Temperature Alarm 30 min

Limit Relative Maximum Temperature +4.0°C

Limit Relative Minimum Temperature -4.0°C

Maximum Air Temperature +20.0°C

Minimum Air Temperature +10.0°C

Differential Air Temperature Limitation 0.5°C


2.5 Error messages

The PROBA 50 has a large variety of ways to detect errors and failures. These are shown in an error code in thedisplay, while the ALARM LED lights and, depending on the type of error, the ALARM relay makes contact.

Pressing KEY can reset the ALARM relay. When several failures occur, use the SET key to scrollthrough the errors.

The error code remains visible in the display until the cause of the alarm has been removed.

The PROBA 50 has two fault levels:

* fatal errors* non fatal errors

Fatal Errors can be recognized by the letter 'E' in the display, followed by a number code. The meaning of the codeis:

E 1 All present temperature sensors are at fault

E 2 No temperature sensor present

E 2x Temperature sensor x is higher than the absolute maximum (x is the sensor number). E.g. 'E22' means that sensor 2 is higher than the absolute maximum.

E 3x Temperature sensor x is lower than the absolute minimum (x is the sensor number). E.g. 'E31' means that sensor 1 is lower than the absolute minimum.

During a Fatal Error the ALARM relay is activated. Depending on the Internal Settings the PROBA 50 will stop thecontrol or try to continue.

At the following Fatal Errors the control will always stop:

E 1 All present temperature sensors are at fault.E 2 No temperature sensors present.

As soon as these faults are removed, the PROBA 50 will continue the program.

Non Fatal Errors can be recognized from the letter 'F' in the display, followed by a number code. The meaning of thenumber is:

F x Temperature sensor x at fault. The regulation continues by using the operational temperaturesensors.

F 2x Temperature sensor x is higher than the relative maximum. The relative maximum is linkedto the current setpoint.

F 3x Temperature sensor x is lower than the relative minimum. The relative minimum is linked tothe current setpoint.

In Appendix A (Error messages, see page 18) all possible fatal and non fatal errors are listed.

Depending on the Internal Settings the alarms will be active if the PROBA 50 is on, or only during the execution of aprogram or STANDBY regulation.

Selecting the ALARM relay to be resetable or not is achieved by the SET key. In the last situation the ALARM relaywill drop out when the faults are removed.


3 Datalogger

The PROBA 50 stores every hour measured temperatures, setpoint and the status of the relay. The data of the last 28 days isstored in the memory.

During power failure of the PROBA50 logging will stop. The unit records that there has been a power failure.

By connecting the COM1 port of a computer to the RS 232 port of the PROBA 50, pre-recorded data can be downloaded tothe computer. The required software is available on request from VDH Products.

The data is stored in a DOS file, which can be edited using a normal editor.

The file will display the following data:

TIME - Date/time of the measurementMODE - Status of the PROBA50

* Power off - switched of via ON/OFF* Off - no program or standby* Run - in program mode* Stdby - in standby mode

SETP - SetpointAVERAGE - Control temperatureSENS 1 - Temperature sensor 1SENS 2 - Temperature sensor 2SENS 3 - Temperature sensor 3SENS 4 - Temperature sensor 4PF - Power failure during last hourIP - Internal Programming accessed during last hourCOOL - Cooling relay activated during last hourHEAT - Heating relay activated during last hourVENT - Ventilation relay activated during last hourGAS - Gassing relay activated during last hourH.DIS - Heating function switched off

The date/time is calculated from the last measurement. This measurement obtains the actual date/time from the PC clock. Thedate/time before a power failure could be wrong !


Appendix A (Error messages)

Summary of error messages PROBA 50

type 'E' = Fatal Error.type 'F' = Non Fatal Error.

Table of Fatal Errors

E 1 All present temperature sensors are at fault

E 2 No temperature sensor present

E 21 Temperature of sensor 1 exceeds absolute maximum




E 31 Temperature of sensor 1 below absolute minimum




Table of Non-Fatal Errors

F 1 Temperature sensor 1 is at fault




F 21 Temperature of sensor 1 exceeds relative maximum



F 31 Temperature of sensor 1 below relative minimum




Appendix B (Internal Parameters)

Number Description Range Unit Default

001002003004

010011012013014015016017018019

020021022023

025026027028

030

031

032

033

034

041

042

043

044

051052053054

055056

060061062

Differential coolingOffset coolingDifferential heatingOffset heating

Absolute maximum alarmAbsolute minimum alarmRelative maximum alarmRelative minimum alarmDelay relative alarmAbsolute maximum air temperatureAbsolute minimum air temperatureRelative maximum air temperatureRelative minimum air temperatureDifferential air temperature

Gas supply time program 1 to 5Gassing period program 1 to 5Ventilation time program 1 to 5Ventilation interval program 1 to 5

Gas supply time program 6 to 10Gassing period program 6 to 10Ventilation time program 6 to 10Ventilation interval program 6 to 10

Alarm relay resetable

Stop control during alarm

Absolute alarm when no control

Day 0 sensor selection 0 = control on sensor 1, 2 & 3 1 = in day 0 control on sensor 3 else on sensor 1 & 2

Setpoint change valid till the next setpoint change

Sensor 1 present

Sensor 2 present

Sensor 3 present

Sensor 4 present

Offset sensor 1Offset sensor 2Offset sensor 3Offset sensor 4

Proportional band coolingI-time cooling (999 is P-function)

Software versionSerial numberProduction date

0..20.0-20..20.00..20.0-20..20.0

-10..40.0-10..40.00..10.0-10..0.00..99-10..40.0-10..40.00..10.0-10..0.00.1..10

0..5000..990..2400..48

0..5000..990..2400..24

0 = no1 = yes0 = no1 = yes0 = no1 = yes

0..1

0 = no1 = yes

0 = no1 = yes0 = no1 = yes0 = no1 = yes0 = no1 = yes

-10..+10-10..+10-10..+10-10..+10

0.1..+100..999

---

°C°C°C°C

°C°C°C°Cmin°C°C°C°C°C

minhrsminhrs

minhrsminhrs

-

-

-

-

-

-

-

-

-

0.1°C0.1°C0.1°C0.1°C

°Cmin

--

year/week

0.2-0.10.2-0.6

25.010.05.0-5.030

20.010.03.0-3.00.5

30243012

30243012

0

0

0

0

0

1

1

1

1

0.00.00.00.0

1.015

---


Number Description Range Unit Default

110111112113114114

120121122123124125126

130131132133134135136137

140141142143144145146147148

150151152153154155156157158159

999

Temperature day 0 program 1Temperature day 1 program 1Temperature day 2 program 1Temperature day 3 program 1Temperature day 4 program 1Temperature standby program 1

Temperature day 0 program 2Temperature day 1 program 2Temperature day 2 program 2Temperature day 3 program 2Temperature day 4 program 2Temperature day 5 program 2Temperature standby program 2

Temperature day 0 program 3Temperature day 1 program 3Temperature day 2 program 3Temperature day 3 program 3Temperature day 4 program 3Temperature day 5 program 3Temperature day 6 program 3Temperature standby program 3

Temperature day 0 program 4Temperature day 1 program 4Temperature day 2 program 4Temperature day 3 program 4Temperature day 4 program 4Temperature day 5 program 4Temperature day 6 program 4Temperature day 7 program 4Temperature standby program 4

Temperature day 0 program 5Temperature day 1 program 5Temperature day 2 program 5Temperature day 3 program 5Temperature day 4 program 5Temperature day 5 program 5Temperature day 6 program 5Temperature day 7 program 5Temperature day 8 program 5Temperature standby program 5

Password 0 = PRG key 1 = STBY key 2 = GAS key 3 = VENT key 4 = SENS key 5 = SET key 6 = UP key 7 = DOWN key 8 = KEY key 7 = ON/OFF key

-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0

-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0

-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0

-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0

-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0-10..40.0

1111-9999

°C°C°C°C°C°C

°C°C°C°C°C°C°C

°C°C°C°C°C°C°C°C

°C°C°C°C°C°C°C°C°C

°C°C°C°C°C°C°C°C°C°C

-

14.518.018.016.515.515.0

14.516.516.516.516.515.515.0

14.516.516.515.515.515.514.514.0

14.515.515.515.515.515.514.514.514.0

14.514.514.514.514.514.514.514.514.514.0

1234


Appendix C (Technical Specifications)

Specifikations.

Type : PROBA 50Wall-mounting; Housing : Grey plastic

Polystyrol 454h KG 2 natur BASF Dimensions : 213 x 180 x 85mm (whd)Panel-mounting; Housing : Steel plate panel in silvergrey Dimensions : 217 x 155 x 85mm (whd) Panel cutout : min. 208 x 146mm (wh) Front : PolycarbonateRange : -10/+40°CSupply : 230 Vac 50/60 HzPower supply : 9 VAFuse : 100mA Slow 250VBattery NiCad : NCK24/35MAH by EMMERICHOperation temp. : -20/+50°CStore temp. : -20/+60°COperating RH : 10/90% RH not condensingAccuracy : ± 0,5% of the temperature range

Front.

Display : 4-digit digital display for temperature display 4-digit digital display for setpoint display 4-digit digital display for program time display 4-digit digital display for program day display

Indication : 4 LED for sensor indication 4 LED for function indication 10 LED for key indication 1 LED for alarm

Keys : 13 push buttons for control

In- and Outputs.

Sensors : 4x Pt-100 3-wire according to DIN/IEC 751Relays : 5x G2R114: 1x SPDT contact 8A/250 Vac (non inductive)

3x SPST with one common 8A/250 Vac (non inductive)1x SPDT with the same common as above 8A/250Vac (non inductive)

Analogue out : 1x 0/+10 Vdc, Rb min 10K OhmCommunication : RS 232


Appendix D (Frontview PROBA50)

Wall-mounting:

Panel-mounting:


Appendix E (Connection diagram PROBA50)

Wall-mounting:


Panel-mounting:


Appendix F (Dimensions PROBA50)

Wall-mounting:


Panel-mounting:

@

Documents

PROBA 50 - VDH Products B.V.The PROBA 50 is also able to control the application of gas during the ripening program. The duration of the gasification is adjustable. During this period