Troubleshooting - Samon SA 200 Anleitungen

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Check and calibration of detector types GD230/24,

GS230/24, GR230/24, GK230/24 and GSR230/24

To check and calibrate the detector you need an SA200 -

service adapter, connected to a multimeter.

1. Check power supply.

GD/GS/GR230 - supply 230VAC

GD/GS/GR24 - supply 12-24VAC or DC

2. Connect the SA200-serviceadapter to the test terminal.

Turn the switch to check right setting/value.

Start to check the 5 VDC circuit, turn switch to "SUPPLY 5V".

The value shall be 5 V +-0,15V.

3. How to check zero point, "offset".

(Offset = GV-value in clean air) Turn switch to "OFFSET" and

read the value. The offset-value shall be approx. 0,2-0,5V DC,

depending on gas type. The voltage shall increase of gas

influence.

Adjusting the offset-value is made by the GV-pot on the

terminal board. The detector has to be power supplied at least 1

hour before any adjustment is made and without any airflow

influence during the test.

IMPORTANT! Adjusting offset value has to be done in clean

air.

4. Check and changing of alarm levels.

At the control board there are three potentiometers to adjust set

points for alarm "A","B" and "C".

How to change the alarm levels.

- Connect the instrument and turn switch to "ALARM A", then

adjust the potentiometer "A" until the new value is showed on

display.

Repeat the procedure for alarm level B and C.

For information about set points and ALARM-levels for different

types of gases, please contact us.

Troubleshooting.

Detector gives no alarm on gas influence?

- Check that offset (GV-value) will increase at gas influence,

voltage must be higher than set point value to effect an alarm.

- Check that there is no time delay chosen at the DIP-switch.

- Check that "Service mode" is not chosen.

Constant alarm from detector?

- Check the offset (GV-value) as above and that there is no gas

in the area.

- Check that there are no other gases, solvents or other

vapours (smells) which can disturb and give a false alarm.

- If GV-value is too high (more than any alarm level) move the

detector to another area without gas and re-calibrate the offset

(GV-value) once again as above.

Constant Fault Alarm?

- The detector has a built-in fail-safe circuit, meaning that if the

gas sensor (gas sensing element) breaks down, the unit will

indicate fault alarm. The same thing will happen if the offset

(GV-value) is too low < ~0,1V.

- If that happens, make a new offset calibration as above, and

increase the offset to 0,2-0,5V.

IS SA200 0711.doc

SA 200

Check and calibration of MPU-units with detector types MP-

D, MP-DS, MP-DR and MP-DK

To check and calibrate the equipment you need an SA200 –

service-adapter, connected to a multimeter.

Important

The MPU-unit and the detectors have to be power supplied at

least 1 hour before any adjustment is made and without any

airflow influence during the test.

Check power supply.

If no UPS - supply 230VAC

With UPS - supply 24VDC

Procedure per channel:

1. Connect the SA200-service adapter to the test terminal

on the control board (one per channel).

Turn the switch to check right setting/value.

Start to check the 5 VDC circuits, turn switch to "SUPPLY 5V".

The value shall be 5 V +-0,15V.

2. Check zero point, "offset".

(Offset = GV-value in clean air). Turn switch to "OFFSET" and

read the value. The offset-value shall be approximately 0.2 –

0.5 VDC, depending on gas type. The voltage shall increase of

gas influence. Adjusting the offset-value is made by the GV-

potentiometers on the detectors.

IMPORTANT! Adjusting offset-value has to be done in

clean air.

3. Check and changing of alarm levels.

At the control board there are three potentiometers to adjust

setpoints for alarm "A","B" and "C".