ProMinent DULCOTEST PAA 1-mA-200 ppm, Operating Instructions Manual, Page: 43 / 100

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Pr o Minent ®
6) coating/deposits (mangan- Clean or change diaphragm
ese, iron oxide) on the cap (see sect. 6);
diaphragm cap run in the measuring cell (see
sect. 8.1),
calibrate (see sect. 8.2)
Measuring cell measured No electrolyte in the Fill with electrolyte (see sect. 6
value is 0 ppm diaphragm cap assembly, sect. 8.1 running-in
time and sect. 8.2 calibration)
Measuring cell measured 1) measuring cell connected Connect the measuring cell
value is 0 ppm and error to controller with incorrect correctly to the controller
message appears on the polarity (see sect. 7)
DULCOMETER
®
D1C 2) signal cable broken Change signal cable
controller “PES input < 3 mA” 3) defective measuring cell Return the measuring cell
4) defective control equipment Check the control equipment
with measuring cell simulator
(DULCOMETER
® Simulator,
order no.1004042),
return if faulty
Measuring cell measured 1) running-in time too short See section 8.1 running-in
value is 0 ppm and measuring time
cell current is between 3.0 2) defective reference Return the measuring cell
and 4.0 mA** electrode* for regeneration
Error message on 1) PES content exceeds Check system, fix the fault,
DULCOMETER ® D1C upper limit of instrument repeat calibration (see sect.
controller “PES input >23 mA“ measuring range 8.2)
2) defective measuring cell Return the measuring cell
Measuring cell measured 1) defective reference Return the measuring cell for
value is unstable electrode* regeneration
2) restricted operation Optimise control operation
* If the reference electrode has a silvery sheen or looks white, it needs to be regenerated.
Brownish-grey discolouration is however normal.
** To isolate faults, the current in the measuring cell can be displayed via the DULCOMETER ®
D1C whilst the latter is electrically connected to the measuring cell.
You can read about this in the complete operation menu, see operating instructions manual for
DULCOMETER
®
D1C section 8 in the set-up menu “PES calibration” the value under “zero
point”. You should then confirm, not with the Enter key, but leave the menu using the Back key.
Troubleshooting
Fault Possible cause Solution
BA_DT_097_10_08_4spr.p65 09.10.2008, 13:19 Uhr 43