Endress+Hauser Topcal S CPC310, Operating Instructions Manual

Page: 140 / 176

Troubleshooting
140
10.3 Process-specific errors
Use the following table to locate and eliminate any errors occurring.
Maintenance 0 E176 Not used
Maintenance 1 E177 SCS reference electrode warning 1 (digital sensor)
Maintenance 2 E178 Not used
22 Failure 3 E179 Not used
Failure 4 E180 Data error sensor 1 (digital sensor)
Maintenance 5 E181 Not used
Maintenance 6 E182 Not used
Maintenance 7 E183 Not used
Byte NAMUR Bit Error no. Short error description
Error Possible cause Tests and / or remedial action Equipment needed, spare parts
Device cannot be operated,
display value 9999
Operation is locked via key pad ("CAL"
+ "DIAG" pressed simultaneously =
locked)
Press "MEAS" and "PARAM" simultaneously
to unlock.
Measuring chain zero-point
cannot be set
Reference system poisoned Test with a new sensor pH/redox sensor
Diaphragm blocked Clean or grind diaphragm
HCl 3 %, file (only for ceramic diaphragm,
only file in one direction)
Measuring line broken
Short-circuit pH input at device
⇒
Display
pH 7
Asymmetrical sensor voltage too great
Clean diaphragm or test with another
sensor HCl 3 %, file (only for ceramic diaphragm,
only file in one direction)
Potential matching (PA/PM)
transmitter
⇔
Incorrect medium
Unsymm.: No PM or PM at PE
Symm.: PM connection mandatory
See "Connecting analog sensors" section
No calibration possible as
sensor adjustment time too
long With ISFET sensor: Film of moisture on
measuring surface removed by drying or
blowing out with compressed air
Ensure film of moisture or buffer dwell time
> 6 min.
No or creeping display
change
Sensor fouled Clean sensor See "Cleaning pH/redox electrodes" section.
Sensor old Replace sensor New sensor
Sensor defective (reference lead) Replace sensor New sensor
Problem with diaphragm or missing
electrolyte Check KCl supply (0.8 bar above medium
pressure)
KCl (CPY4-x)
Measuring chain slope
cannot be adjusted/slope
too low
Connection not at high impedance
(humidity, dirt)
Test cable, connector and junction boxes
pH simulator, insulation, see "Checking the
connecting cables and junction boxes"
section
Instrument input defective Directly test instrument pH simulator
Sensor old Replace sensor pH sensor
Measuring chain slope
cannot be adjusted/no
slope
Hairline crack in glass membrane Replace sensor pH sensor
Connection not at high impedance
(humidity, dirt)
Test cable, connector and junction boxes
pH simulator, insulation, see "Checking the
connecting cables and junction boxes"
section
Semiconductor layer in measuring cable
not removed Check inner coaxial cable, remove black
layer