Ending Special States; Led And Symbol Indications - Dräger Polytron 8000 Serie Instructions For Use

en Operation
Display example Description
Value is under measuring range
The gas concentration is beyond the
measuring range of the sensor.
Analog interface: Drift below zero
O 2
Vol.% Relays: Fault relay switches
Fault indication
The
side of the display.
Analog interface: Fault current
Relays: Fault relay switches
Maintenance indication
20.9
The
side of the display.
This is displayed when alarms are
O 2 Vol.%
deactivated, during calibrations, bump
test and maintenance work.
Analog interface: Maintenance cur-
rent
Relays: No change
Warning indication
20.9
The
side of the display.
Analog interface: Warning current
O 2 Vol.%
Relays: No change
1) Only when warning current is enabled. Factory default setting: dis-
abled.
Warm-up phase 1
The symbol is displayed on the right side of the display.
The remaining time is indicated on the left side of the display.
Analog interface: Maintenance current
Relays: Fault relay switches
For warm-up phase 1, the fault relay behavior is configurable
(see "Setting fault relay warm-up 1", page 25)
Warm-up phase 2
The symbol is displayed on the right side of the display.
The measured value is indicated on the left side of the display.
Analog interface: Measured value
Relays: Behavior as in measuring mode (Fault relay does not
indicate warm-up phase 2.)

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 18)
and begin troubleshooting (see "Troubleshooting", page 21).
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.
symbol is displayed on the right
symbol is displayed on the right
symbol is displayed on the right
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 30.
®
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
1)
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.
After over range measuring values, verify that the gas
concentration is below 100 %LEL (e.g. using a portable
instrument).
8.2

LED and symbol indications

Symbol LED
Red
Yellow
Green
LED status
– When the first alarm (pre alarm) has been triggered the
red LED flashes in single mode
– When the second alarm (main alarm) has been triggered
the red LED flashes in double mode
– When an alarm is acknowledged before the alarm
condition clears, the red LED is lit continuously to indicate
the present alarm condition.
Description
Alarm Triggered
Fault
Power on
.
.
®
Dräger Polytron 8000 Series