17. Operation and Maintenance of Neon pR
Dr. A. Kuntze
I
Gutes Wasser mit System
Robert-Bosch-Str. 7a
40668 Meerbusch
+49 (0) 2150-7066-0 / Fax -60
www.kuntze.com
71
lead to the text message “low water” or “level” or “ext. controller stop” according to
settings, and to an automatic controller stop.
Regularly test the function of the alarm relay and ensure that in case of an alarm, the
instrument issues the alarm and the connected control center registers the alarm
correctly. With the aid of the test menu, such test is easily accomplished.
Note
In the Hold mode, the alarm function is deactivated.
17.2.7.
Exchange of consumables
Besides the sealing rings and the KCl solution, buffer solutions and sensors are
typical consumables. Buffer solutions should always be kept cool and out of direct
sunlight. Open bottles should not be stored for too long
– alkaline solutions tend to
absorb carbon dioxide from the air, and acidic solutions often contain organic acids,
providing nutrients for microbiological growth.
Never put used solution back into the bottle. Nowadays a variety of single-use
sachets with certified accuracy are available. These sealed sachets can be stored
without changes over long periods of time and eliminate one of the mayor
uncertainties in case of calibration problems.
The operating life of the sensor depends strongly on the application and the
measuring conditions. The info menu of the calibration menu shows the results of the
last 10 calibrations which gives you an idea on the condition of your sensor. If the
slope and/or the zeropoint approach the tolerated limits, it can be expected that it will
give a calibration error and has to be replaced in the near future.
If you have to exchange a sensor, make sure that the replacement fits your
equipment and your application. Remember that you have to calibrate whenever you
change a sensor!
Recalibration is also necessary if you exchange the instrument.
Note
Cables also tend to wear out, especially if they are frequently
unplugged. Find more information in the
“ Trouble-Shooting”
Summary of Contents for Neon pR
Page 1: ...Neon pR Dr A Kuntze manual...
