Endress+Hauser Topclean S CPC30, Руководство по эксплуатации

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8 Troubleshooting Topclean S
130 Hauser
pH value in process
incorrect No / incorrect temperature compensa-
tion ATC: Activate function
MTC: Set process temperature
Conductivity of medium too low Select pH electrode with liquid KCl. e.g. Ceraliquid CPS41, Purisys CPF201
Flow rate too high Reduce flow rate or measure in a bypass.
Potential in medium Possibly earth with / at PM pin (connect PM
to PE). Problem mainly occurs in plastic lines
Device unsymmetrical and PML
connected Possibly earth with / at PM pin (connect PM
to PE)
Electrode soiled or with deposits Clean electrode (see Chap. 8.8.1). Highly polluted media:
Use spray cleaning.
Measured values fluctuate Interference in measuring cable Connect cable screening as per wiring
diagram. Wiring diagram see page 38
Faults in signal output line Check line installation, possibly route line
separately.
Interference potential in medium Symmetrical measurement (with PML)
No potential matching (PA/PM)
With symmetrical measurement Connect PM pin in assembly to device
terminal PA/PM. Possibly earth medium by connecting PM
to PE
Controller / limit contact
does not work Controller switched off Activate controller s. chap. 6.6.
Controller in “Manual / Off” mode Select "Auto" or "Manual on" mode. Keypad / PARAM / manual operation /
contacts
Pick-up delay setting too long Switch off or shorten pickup delay period.
"Hold" function active
– "Auto hold" during calibration
– "Hold" input activated
– Manual "hold" active using keypad
– "Hold" active during configuration Determine cause of hold and eliminate if not
desired. "Hold" is indicated in display when active
Controller / limit contact
work continuously Contact in "Manual/on" mode Set controller to "Manual/off" or "Auto".
Dropout delay setting too long Shorten dropout delay period.
Control circuit interrupted Check measured value, current output or
relay contacts, actuators, chemical supply.
No pH/mV current
output signal Line open or short-circuited Disconnect both (!) lines and measure
directly on instrument. mA meter 0–20 mA DC
Output defective Replace controller module See spare parts list in chap. 8.3
Fixed current
output signal Current simulation active Switch off simulation. See DIAG / Service / Simulation
Processor system inactive Switch instrument off and on. EMC problem: If repeated, check
installation
"Hold" is active. "Hold" status see display.
Current output signal
incorrect or different than
expected Incorrect current assignment Check current assignment: Check whether
you selected 0–20 mA or 4–20 mA.
Incorrect signal assignment Any current output can be assigned to any
measured value (pH1 or 2, Temp. 1 or 2,
Delta pH) Check under "PARAM" / current output.
Total load in current circuit too high
(> 500 ohms) Disconnect output and measure current
directly on instrument. mA Meter for 0–20 mA DC
Data cannot be saved No DAT memory module available DAT available as accessory, s. chap. 9
CPG30 does not work
(non-Ex version) No supply voltage Check connection.
Fuse defective Check, if necessary, replace.
Switch to "Maintenance" Turn switch to "Measure".
CPG30 does not work (Ex
version) Power supply from CPM153 defective. Measure, CPG30 terminals L+/L– DVM 20 V DC
Error Possible cause Remedial action Equipment needed, spare
parts