Operation Special States; Exiting Special States; Calibration; Test Gases - Dräger Polytron 6100 EC WL Instrucciones De Uso

9 Operation
9.1 Special states
In a special state, correct measurement or alarm activation is
not guaranteed.
Special states are as follows:
– Gas concentration outside measuring range
– Error

– Calibration

– Bump test
– Warm-up phase
– Maintenance mode
Special states are displayed in PolySoft.
9.2

Exiting special states

1. Identify the malfunction:
a. Check the measured value status (PV.STATUS).
b. Check the device status (DIAG_STATUS).
c. Read out the device status using PolySoft.
2. Start troubleshooting (see "Troubleshooting", page 29).
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.
Dräger Polytron 6100 EC WL, Dräger Polytron Repeater ISA
sensors.
2
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. For O sensors no calibration gas is needed, as
2
oxygen from ambient air is used.

10.2 Preparing the test gas supply

Prerequisite:
– The warm-up phase of the sensor is complete (see
"Commissioning", page 26).
– 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).
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 07 068)
Prepare the test gas supply:
1. Connect the calibration adapter (Fig. G 2) and test gas
cylinder (Fig. G 4) to the hose (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

In the case of O sensors, the zero-point is only checked (not
2
adjusted) 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. Use nitrogen for verification.
Operation en
) is used.
2
is not
2