Endress+Hauser Topclean S CPC30, Руководство по эксплуатации

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Topclean S 8 Troubleshooting
Hauser 129
8.1.2 Process-specific errors
Error Possible cause Remedial action Equipment needed, spare
parts
Instrument
unconfigurable,
Display for code prompt is
9999 Instrument hardware is locked via key-
pad (Keys "CAL" + "DIAG" simultane-
ously = security locking) Press "MEAS" and "PARAM" simultaneously
to unlock.
Measuring chain zero
point not settable Reference system poisoned Test with new electrode. pH/mV electrode
Diaphragm blocked Clean diaphragm or grind ceramic
diaphragm. HCl 3%, file (ceramic diaphragm only,
only file in one direction)
Measuring line broken pH input on instrument
short-circuit
⇒
Display pH7
Reterminate or use new cable
Unsymmetrical sensor voltage too high Clean diaphragm or test with different
electrode. HCl 3%, file (ceramic diaphragm only,
only file in one direction)
Potential matching (PA/PM) Mycom
⇔
Incorrect medium
asymm.: no PM or PM on PE
symm.: PM connection needed Connection s. chap. 4.1.3
No calibration possible, as
sensor settling time is too
long ISFET sensors only: liquid film between
semiconductor and reference lead is
interrupted due to drying or cleaning
with compressed air. Make sure that the liquid film is established
or that the buffer remains in the rinse
chamber for more than 6 min.
Do not use compressed air to clean the
ISFET sensor.
No calibration possible as
measuring chain slope not
adjustable/slope too small Connection not at high impedance
(humidity, dirt) Test cable, connector and junction boxes. pH simulator
Instrument input defective Directly test instrument. pH simulator
Electrode aged Replace electrode. pH electrode
No calibration possible as
measuring chain slope not
adjustable/no slope Hairline crack in glass membrane Replace electrode. pH electrode
Connection not at high impedance
(humidity, dirt) Test cable, connector and junction boxes. pH simulator, see also Chap. 7.3.2
Semi-conductor layer in measuring cable
not removed Check inner coaxial cable, remove black
layer. See page 23.
No or slow display change Electrode soiled Clean electrode. s. chap. 7.1
Electrode aged Replace electrode. New electrode
Electrode defective (reference lead) Replace electrode. New electrode
Inner buffer missing
Electrodes with liquid KCl only (CPS41,
CPS441): Check KCl supply (0.8 bar above
medium pressure).
KCl (CPY4-x)
Problem with diaphragm or missing
electrolyte
Permanent, incorrect
measured value Electrode not immersing or protective
cap not removed Check installation position, remove
protective cap.
Air cushion in assembly Check assembly and installation position.
Earth fault at or in the instrument Test measurement in insulated vessel,
possibly with buffer solution. Plastic vessel, buffer solutions. Behaviour
when instrument is connected to process?
Shunt due to moisture in cable or plug Check cable with plug for high impedance.
Replace if necessary.
Hairline crack in glass membrane Replace electrode. pH electrode
Instrument in impermissible operating
status (no response on pressing key) Switch instrument off and on. EMC problem: If repeated, check
grounding and wire routing
Incorrect temperature
reading Incorrect sensor connection Check connections using wiring diagram. Wiring diagram see page 38
Measuring cable defective Check cable. Ohmmeter
Incorrect sensor type selected Set sensor type on instrument. Check temperature sensor with
Ohmmeter.
Sensor defective Check sensor.