Calibration; Test Gases; Preparing The Test Gas Supply; Zero Adjustment - Dräger Polytron 6100 EC WL Gebrauchsanweisung

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Calibration

Errors and warnings are non-latching. If error or warning
conditions are resolved, the respective special state is also no
longer transmitted.
10 Calibration
During calibration, the measuring accuracy of the sensor is
checked and adjusted with a known test gas concentration.
First, the zero-point and then the sensitivity of the sensor is
calibrated. The length of the calibration intervals depends on
the respective regional normative requirements.
To ensure proper operation, never adjust the sensitivity before
the zero-point is set. If these operations are performed in the
wrong order, the calibration is incorrect.
WARNING
Incorrect adjustment!
Incorrect adjustment can lead to inaccurate measured values.
► After a sensor change, check all settings and parameters.
► Check a newly installed sensor with target gas to ensure
correct operation.

10.1 Test gases

For test gas properties (e. g. humidity, concentration) refer to
the corresponding sensor data sheet.
Test gas humidity is irrelevant for O
Depending on the type of calibration different test gases are
used.
Zero gas
Zero gas is a test gas to calibrate the zero point. If ambient air
is free from interfering impurities and measured gas, it can be
used as zero gas. For O sensors, nitrogen (N
2
Calibration gas
Calibration gas is a test gas to calibrate the sensor sensitivity
during span calibration. Calibration gas is a known
concentration of the measured gas diluted with clean air or
nitrogen.

10.2 Preparing the test gas supply

Prerequisite:
– Warm-up phase of the sensor completed (see
"Commissioning", page 30).
– The date and time are set correctly (check with PolySoft).
WARNING
Health hazard due to test gas
Inhaling test gas may risk health or lead to death.
► Do not inhale test gas.
► Observe risks and security statements related to the test
gas (Refer to data sheets and instructions figuring on
calibration devices).
30
sensors.
2
) is used.
2
Instructions for use |
CAUTION
Triggering alerts by test gas
Applied test gas may trigger alerts.
► Make sure that test gas is no longer applied after
calibration.
Supplies:
– Test gas cylinder with pressure reducer, for corrosive
gases with stainless steel pressure reducer
– Calibration adapter with hose nozzles (order no.
68 10 536)
– Hose, type according to the gas property (e.g., FKM hose,
order no. 12 03 150)
Prepare the test gas supply:
1. Connect the calibration adapter (Fig. G 2) and test gas
cylinder (Fig. G 4) to the tube (Fig. G 3).
2. To discharge the test gas, connect a hose to the second
connector on the calibration adapter.
3. Attach the calibration adapter to the sensor (Fig. G 1).

10.3 Zero adjustment

For O sensors, only checking the zero point (no adjustment)
2
is done when nitrogen is applied to the sensor. The gas
detector indicates an error condition if 0.6 Vol% O
undershot. In the event of an error, repeat the zero adjustment
or change the sensor.

10.4 Carrying out the zero adjustment

Prerequisites:
– Warm-up phases 1 and 2 completed
– The test gas supply has been prepared.
– A connection between the gas detector and PolySoft has
been established.
Carrying out the zero adjustment:
1. Start the zero adjustment in PolySoft.
 ISA100 Wireless
value status "Bad," (substatus maintenance mode
active).
2. Follow the instructions of the wizard In PolySoft.
Flow with test gas supply: 0.5 L/min ± 10 %
3. After completion of the zero point adjustment, switch off
the gas flow and remove the calibration adapter.

10.5 Carrying out the span calibration

Prerequisites:
– Zero point adjustment has been carried out.
– The test gas supply has been prepared.
– A connection between the gas detector and PolySoft has
been established.
®
Dräger Polytron 6100 EC WL, Dräger Polytron
2
™
interface transmits the measured
®
Repeater ISA
is not