H74.0.05.6C-06
Operating Manual GMH 3651
page 17 of 18
15 Error and System Messages
Display
Meaning
Remedy
low battery voltage, device will continue to work
for a short time
replace battery
If mains operation: wrong voltage
replace power supply, if fault continues to
exist: device damaged
low battery voltage
replace battery
If mains operation: wrong voltage
Check/replace power supply, if fault continues
to exist: device damaged
No display
or
weird display
Device does not
react on keys
low battery voltage
replace battery
If mains operation: wrong voltage
check/replace power supply, if fault continues
to exist: device damaged
system error
disconnect battery or power supply, wait some
time, re-connect
device defective
return to manufacturer for repair
SENS
ERRO
sensor error: no sensor cable connected
connect suitable sensor
Sensor, cable or instrument defect
return to manufacturer for repair
ERR.1
Value exceeding measuring range
Check: Is the value exceeding the measuring
range specified? ->value too high!
Wrong sensor connected
Check sensor
Sensor, cable or instrument defect
return to manufacturer for repair
ERR.2
Value below display range
Check: Is the value below the measuring
range specified? ->value too low!
Wrong sensor connected
Check sensor
Sensor, cable or instrument defect
return to manufacturer for repair
ERR.7
system error
return to manufacturer for repair
If
“
BAT
“ is flashing, the battery will be exhausted soon. Further measurements are possible for short time.
If
“
BAT
“ is displayed continuously the battery is ultimately exhausted and has to be replaced. Further
measure
ments aren’t possible any more.
Messages During Calibration/Adjustment
>CAL<
CAL flashing in
display
either preset calibration interval has expired or
last calibration is not valid
Device has to be calibrated!
[AL ERR.1
wrong reference point at air
check sensor and reference gas / solution
[AL ERR.2
slope too low
reference gas / solution wrong
check sensor and reference gas / solution
sensor is defect
replace sensor / perform maintenance
[AL ERR.3
slope too high
reference gas / solution wrong
check sensor and reference gas / solution
sensor is defect
replace sensor / perform maintenance
[AL ERR.4
incorrect calibration temperature
calibration can only be done at 0…40 °C
[AL ERR.5
Zero value to low/negative
sensor is defect
replace sensor / perform maintenance
[AL ERR.6
zero value to high
reference gas / solution wrong
check sensor and reference gas / solution
sensor is defect
replace sensor / perform maintenance
[AL ERR.7
incorrect calibration pressure
check calibration pressure
[AL ERR.8
signal not stable / timeout
check sensor and reference gas / solution
[AL ERR.9
sensor not known: cannot be calibrated
check sensor and wiring
