Owner manual

7 Safety, Errors, Troubleshooting, Diagnosis, GLP
746 VA Trace Analyzer / 747 VA Stand
7-28
Error message Meaning/Causes Rectification Exit
VA STAND - ERROR 3:
Auxiliary electrode
faulty
Fault at reference electrode:
− No connection
Check reference electrode:
− Connect reference electrode with AE
cable
r/a
VA STAND - ERROR 4:
Reference electrode
faulty
Fault at reference electrode:
− No connection
− Air bubbles in electrolyte
− Too less electrolyte
Check reference electrode:
− Connect reference electrode with RE
cable
− Shake the electrode like a clinical
thermometer
− Refill reference electrode (see section
3.6.2)
r/a
VA STAND - ERROR 5:
Empty vessel or
electrodes faulty
− Empty measuring vessel
− Several electrodes faulty
− Add analyte solution
− Check electrodes
r/a
VA STAND - ERROR 6:
IR current overlod
Current overload Change t.pulse or Modul.freq. E/S
VA STAND - ERROR 7:
Stirrer/RDE overload
Stirrer/RDE does not rotate Remove stirrer/RDE, clean and reinsert r/a
VA STAND - ERROR 8:
EBUS timeout occured
Break on EBUS connection
during the program flow
Check connections to the devices
attached via EBUS (VA Stand, Dosi-
mats, etc.)
E/S
VA STAND - ERROR 9:
I compensator or gain
amplifier faulty
Current compensator or
measuring amplifier faulty
− Run diagnostic routine for VA Stand
− If error reappears, inform Metrohm
service
E/S
VA STAND - ERROR 10:
Modulation frequency
faulty
Modulation frequency faulty Inform Metrohm service E/S
VA STAND - ERROR 11:
AD converter faulty
AD converter faulty Inform Metrohm service E/S
VA STAND - ERROR 12:
Modulator RAM faulty
Modulator RAM faulty Inform Metrohm service E/S
VA STAND - ERROR 13:
U polarisation faulty
Voltage polarization faulty Inform Metrohm service E/S
VA STAND - ERROR 14:
Adder faulty
Measured value acquisition
faulty
Inform Metrohm service E/S
VA STAND - ERROR 15:
Current limits
detectors faulty
Current limit value detectors
faulty
Inform Metrohm service E/S
VA STAND - ERROR 16:
Meas.cycles counter
faulty
Measurement cycles counter
faulty
Inform Metrohm service E/S
VA STAND - ERROR 17:
Prep.cycles counter
faulty
Preparation cycles counter
faulty
Inform Metrohm service E/S