Maintenance Of The Measuring Cell - ProMinent DULCOTEST PAA 1-mA-200 ppm Operating Instructions Manual

Maintenance frequency
Maintenance operation
Cleaning the diaphragm Do not unscrew the diaphragm cap!
ProMinent ®
9

Maintenance of the measuring cell

IMPORTANT
• Maintain the measuring cell regularly in order to avoid over
metering in a control system resulting from an incorrect
measured value!
• Observe the relevant national regulations in force for fre-
quency of maintenance!
• Do not disturb the electrodes or bring them into contact
with greasy substances!
• Do not unscrew the diaphragm cap when cleaning the dia-
phragm!
Figures based on
experience for:
Other applications:
Check the measuring cell regularly for dirt, deposits and air
bubbles!
Avoid, as far as is possible, contamination of the diaphragm with
particles, deposits/sediments, etc. Eliminate air bubbles by in-
creasing the flow.
Check the measuring cell display value on the control equipment
regularly using suitable reference methods (e.g. titration – see
appendix).
If necessary, re-calibrate the measuring cell (see section 8.2
calibration).
If calibration is no longer possible, you must clean or change the
diaphragm cap and then repeat calibration (see sections 6,
assembly, 8.1 running-in time and 8.2 calibration).
Wipe the diaphragm with a damp cloth.
Maintenance of the measuring cell
CIP: 1 month
according to operating instructions manuals
41