38
5.3
Fault finding
Fault symptom
Diagnosis
Action
Unit will not switch on
No/dead batteries fitted
Try another battery set (safely)
Unit will not switch off
Software locked out
Remove & replace battery clip (safely)
Battery symbol appears
Battery state low
Replace batteries (safely)
Back light drains battery
life
Excessive use of backlight
Avoid or reduce use of backlight
Unit will not zero
Software locked out by
hardware
Remove & replace batteries (safely)
LCD appears blank/dim
Contrast control setting wrong Turn off & on; press & hold contrast
Bar graph/number do not
change
Peak hold selected
Press zero or change Peak Hold state
Range does not change
Range not set in Auto-range
Press & hold Range until Auto-range
He range will not show –5 Unit with nozzle ON and/or
range
Reset via Nozzle and Range keys
Gas group is wrong
Gas Group not set correctly
Press & hold Gases until shown OK
Nozzle/Peak not showing
Nozzle/Peak is not set
correctly
Press & hold Nozzle until both correct
Calibration due message
Unit has exceeded 1 year on
cal
Return to Ion Science for recalibration
Unit will not zero correctly Sensor contaminated
Leave to stabilise
Blocked probe
Probe blocked by solid or
liquid
Remove probe; clean; check now OK
Stalled motor
Motor failed & probe not
blocked
Return to supplier for repair
Instrument readings noisy Loose probe
Tighten nut slightly
Instrument readings noisy Test environment
contaminated
Move test into clean area
5000is will not switch on
Internal fuse blown
Return to supplier for repair
Table 5 – Fault finding
6
STORAGE AND DISPOSAL
6.1
Storage
If you will store the Gas Check for a long time, we recommend that you remove the batteries: refer
to Section 5.2
Refit the Gas Check in its storage case and store in dry, cool conditions. When required for use,
unpack as described in Section 3.
6.2
Disposal
Dispose of the Gas Check, components and used batteries safely in accordance with all local and
national safety and environmental requirements. Some of the Gas Check carry case plastic material is
recyclable.