User`s guide

- 52 -
V
V
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O
O
P
P
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E
R
R
A
A
T
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N
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G
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F
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U
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SYMPTOMS CAUSES REMEDIES
- The screen shows nothing, if
there are no further audio beeps.
- Battery exhausted.
- Battery pack discharged.
- Instrument faulty
- Change the battery.
- Re-charge the battery pack.
- Return the instrument to the
distributor.
FAULT appears, with a
continuous sound and visual
alarm cannot be reset
- Memory loss and lithium battery
exhausted.
- Change the lithium battery and
if the fault persists, return the
instrument to the factory.
DISCHARGE appears, with a
common, continuous sound and
visual alarm, which can be reset.
- The battery is starting to run
down and only about 30 minutes
of use remain.
- Re-charge the battery pack or
change the dry batteries.
DISCHARGE appears, with a
common, continuous sound and
visual alarm (cannot be
acknowledged)
- The battery is discharged and
the instrument is no longer usable
- Re-charge the battery pack or
change the dry batteries
GAS EXHAUST appears with a
sound and visual alarm (cannot be
acknowledged)
- Cells exhausted - Switch off the instrument and
change the cell concerned.
EX RANGE appears and then
> 5.0 GAS
- with a sound and visual alarm
(cannot be acknowledged) in
explosive gases.
- with a sound and visual alarm
(can be acknowledged) in toxic
gases and 0
2
gas
- The measuring range has been
exceeded
- The measuring range has been
exceeded
- It is necessary to exit from the
hazardous area, and switch off the
instrument, then switch it on
again.
- It is necessary to exit from the
hazardous area
GAS CAL appears with a sound
and visual alarm (cannot be
acknowledged)
- Self-adjustment unsuccessful - Repeat the self-adjustment
procedure or change the cell
- IMPOSSIBLE appears - Self-adjustment not possible - Move to a clean atmosphere and
repeat the self-adjustment
procedure
- The measurements are negative - Zero not set - Perform a self-adjustment
procedure
GAS Deft appears
GAS : is the gas type detected.
Sound and visual alarm (cannot
be acknowledged)
- Cell defective or missing
- Calibration unsuccessful
- Measurement too negative.
- Insert or change the cell
concerned, after first switching
off the instrument
- Perform calibration once again.
If the fault persists, change the
cell