User manual

H35.0.02.6C-09 Operating Manual GMH 3250 page 11 of 14
10 Error And System Messages
Error or system
messages
Description / Reason
Remedy
No sensor connected
sensor/cable damaged
Connect one sensor at least
Replace sensor/cable
Low battery voltage
device will only continue operation for
a short time
replace battery
Low battery voltage
replace battery
- If mains operation: wrong voltage
replace power supply, if fault continues to exist:
device damaged
No display
or
mazy characters
- Battery voltage too low
replace battery
- If mains op.: power supply defective
or wrong voltage/polarity
check/replace mains supply
- System error
disconnect battery or power supply, wait for a
short time, re-connect
- Device defective
return to manufacturer for repair
Values exceeding measuring range
Are there any values exceeding the measuring
range specified?
->temperature too high
Display resolution set to 0.1°?
-> set to ’Auto’
Sensor/cable defective
-> replace probe
Values below measuring range
Are there any values below the measuring
range specified?
-> temperature too low
Display resolution set to 0.1°? -> set to ’Auto’
for DIF-channel and difference<-2040°
-> temp. difference too low
Sensor/cable defective
-> replace probe
Values below display range
for DIF-channel and difference <-1999°:
exchange sensors
CH1<->CH2 (watch out for offset setting!)
System fault
switch on again: if fault continues to exist, de-
vice is damaged
-> return to manufacturer for repair
Instrument not within working tem-
perature
keep working temperature in between -
25...50°C
Value could not be calculated
One measuring variable required for calculation
is missing (no sensor) or incorrect (over-
flow/underflow)