Dr. A. Kuntze Neon pR, Руководство пользователя

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18. Trouble-Shooting
Dr. A. Kuntze I Gutes Wasser mit System Robert-Bosch-Str. 7a
40668 Meerbusch
+49 (0) 2150-7066-0 / Fax -60
www.kuntze.com
85
If the problem lies with the sensor but not with the connector, try to clean the junction
to open it up in case it is blocked. Ceramic junctions can even be abraded. If you
heat the sensor under hot tap water and let it cool in 3M KCl, the junction fills with
salt solution to give good contact via the junction.
Check for air bubbles inside the sensor
– any bubbles in the area of the junction and
the glass bulb have to be removed. Shake the sensor gently to make the bubbles rise
to the top of the sensor so that the bottom part of both measuring and reference
electrode are completely filled with liquid.
If all these measures do not solve the problem, the sensor has to be exchanged.
If the sensor is no older than six months, we strongly advise to send it in for
examination. If the examination shows a defect that you could not have caused, you
will receive a replacement free of charge, and if not, then at least you will know the
cause of the trouble and be able to prevent a repetition.
Event message Cause Suggested remedies
Check temperature
input
The temperature input
receives no proper signal
Check Pt100/Pt1000
Check cable
Without sensor use manual
compensation
If the temperature input does not receive an appropriate signal, you may have
selected automatic temperature compensation although no temperature sensor is
connected. In that case switch to manual compensation. It is also possible that a
Pt100 was connected but the compensation was set to Pt1000, or vice versa.
If you have connected a Pt100 or Pt1000, check if you have used the right terminals
for connection and the right settings in the temperature menu.
As with the measuring input, a defective cable or sensor can be the cause for this
message. You can check temperature sensors with an Ohmmeter
– a Pt100 has a
resistance of approx. 109 Ohm at room temperature, a Pt1000 approx 1080 Ohm.