15.3 Possible causes of faults
16 Cleaning the surfaces
Use a moist cloth and a mild detergent. Do not use any aggressive detergents or solvents!
17 Technical data
Mains voltage/mains frequency:
230 V~ / 50 Hz
Wattage:
2 W + connected solenoid valve (max. 40 W)
Output for solenoid valve:
230 V~, max. 40 W / 0.2 AT
Length of mains lead:
3 m
Length of connecting lead:
3 m
Length of electrode cable:
3 m
Electrode connection:
BNC
Connection for connecting cable:
SUB-d, 9-polig
Measuring range:
pH 3 - 9
Setting range:
pH 5.0 - pH 8.8
Switching values (hysteresis):
Set value +/- 0.1
Splash-proof in accordance with IPX4
CE
33
Fault
Cause
Remedy
Calibration not possible or The electrode is in pH 7 (pH 4) calibration solution,
Repeat calibration procedure, beginning with pH 7
"Err" appears on display
but the "pH 4" ("pH 7") key has been pressed
Calibrating solutions are contaminated/too old
Use fresh calibrating solutions,
repeat calibration
pH-electrode soiled
Clean pH-electrode (see 6.1).
pH-electrode worn out or defective
Connect new pH-electrode and calibrate;
carry out additional calibration after 1 week
"F 01" appears on display Electrode cable not connected properly
Check connection
Electrode cable defective
Replace electrode
Measured value outside of measuring range
---
No supply of CO
2
although Problem with CO
2
supply
Check CO2 system (e.g. cylinder empty? Needle
indicator lamp for
valve closed? Hose connection leaking?)
CO
2
-supply is ON
Solenoid valve not connected
Check connection, replace solenoid valve if
properly or defective
necessary
Fuse defective
See Point 14.1
Display blank
Controller defective
Send controller in to Dennerle after-sales
service for inspection.
