Technical Manual | Dräger Polytron
®
8000 Series 43
Operation
8.1.3 Ending special states
Fault / warning indication
Faults and warnings are non-latching. If the fault or warning condition clears, the
message disappears.
To solve warning and fault conditions, display the error code or warning message
(see "Displaying Information", page 46) and begin troubleshooting (see
"Troubleshooting", page 54).
Value under/over measuring range
The display indicates that the gas concentration is beyond the measuring range of
the sensor. The indication disappears as soon as the gas concentration is within the
measuring range.
NOTICE
Sensor malfunction
Gas concentrations beyond the measuring range of the sensor might cause sensor
malfunctions.
Check the calibration.
Polytron
®
8200 CAT with DQ sensor:
An over range has to be acknowledged with [OK] after verifying that the gas
concentration is below 100 %LEL (e.g. using a portable instrument).
Latching alarms is the default setting of the instrument.
For instruments without relays, the over range can be set to non-latching. In this
case, the over range indication disappears. The control unit must support this
function! For further information see: "Setting DQ sensor latching", page 79.
Polytron
®
8200 CAT with LC sensor:
WARNING
Ambiguous readings at over range measuring values
Latching over range alarms are not supported with LC sensors.
For a safe operation in accordance with BVS 13 ATEX G 001 X, operate the
transmitter when connected to a control unit that has a latching over range
indication. Do not use internal alarm relays of the transmitter.
Make sure that over range latching is active at the control unit.
8.2 LED and symbol indications
Symbol LED Description
Red Alarm Triggered
Yellow Fault
Green Power on
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