Labkotec SandSET-1000 12 VDC, Инструкция по установке и эксплуатации

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SandSET-1000 12 VDC Sludge Alarm Device D15649_E-2
Installation and Operating Instructions
Copyright © 2019 Labkotec Oy 8/13 We reserve the right for changes without notice
switches are as set in the factory.
Switch S2 is used to set the operational delay of the control unit .
When the switch is in low position, relays operate and buzzer is on after 5 seconds after the
sensor current has reached the trigger level, and if the level still remains on the same side of
the trigger level.
When the switch is in high position, the delay is 30 seconds.
Delays are operational in both directions (energizing, de-energizing). Alarm LED follows the
sensor current value and trigger level without delay. Fault alarm takes place after a fixed
delay of 5 sec.
4 TROUBLE-SHOOTING
Problem: MAINS LED indicator is off
Possible reason: Supply voltage is too low or the fuse is blown. Transformer or MAINS LED
indicator is faulty.
To do: 1. Check if the two pole mains switch is off.
2. Check the fuse.
3. Measure the voltage between poles - and +. It should be 11-17 VDC.
Problem: No alarm when sensor in sludge or air, or the alarm will not go off
Possible reason: The SENSITIVITY setting is wrong in the control unit (see figure 7).
To do: 1. Lift the sensor up in the air or immerse it into sludge and wait 10 seconds.
2. Turn the SENSITIVITY potentiometer slowly anticlockwise until the sensor gives
an alarm.
3. Immerse the sensor into water and wait until the alarm goes off. If the alarm
does not go off, turn the potentiometer slowly clockwise until the alarm goes off.
4. Lift the sensor up in the air or sink into sludge. The sensor should give an alarm
again.
Problem: FAULT LED indicator is on
Possible reason: Current in sensor circuit too low (cable break) or too high (cable in short circuit).
The sensor might also be broken.
To do: 1. Make sure, that the sensor cable has been connected correctly to the
SandSET-1000 12 VDC control unit. See instructions from chapter 2 or SET/S2
installation and Operating Instructions.
2. Measure the voltage separately between the poles 10 and 11. The voltages
should be between 10,3….11,8 V.
3. If the voltage is correct, measure the sensor current. Do as follows:
3.1 Disconnect sensor
’s [+] wire from sensor connector (pole 10).
3.2 Measure short circuit current between [+] and [-] poles.
3.3 Connect mA-meter as in figure 8.
3.4 Connect the wire back to the connector.
If the problem can not be solved with the above instructions, please contact
Labkotec
Oy’s local distributor or Labkotec Oy’s service.
Attention! If the sensor is located in an explosive atmosphere, the multimeter must
be Exi-approved!