Calibration; During Operation; Maintenance - Dräger Polytron 8000 Series Technical Manual

2.5.1

Calibration

– For proper operation, never adjust the span before completing zero adjustment.
Performing these operations out of order will cause the calibration to be faulty.
– If the intended operation is at high altitudes, the reading will be lower than the
reading at sea level (reduced partial pressure). A new span calibration is
recommended if the altitude or the ambient pressure is changed. The factory
calibration is set to sea level.
– Dräger recommends calibrating instruments with target gas. This method is
more accurate than a surrogate gas calibration. A surrogate gas calibration may
only be performed as an alternative if a target gas calibration is not possible.
– Methane and hydrogen should be calibrated with target gas only and not
calibrated with a surrogate gas.
For Polytron
– The user must also read the Instructions for Use for DrägerSensor IR, part
number 9023981
2.6

During operation

– After modifying parameters with the PolySoft PC software or another software,
verify all parameters by downloading from the instrument or by checking them
on the Polytron
– IP ratings do not imply that the equipment detects gas during and after exposure
to those conditions. In case of dust deposits and submersion/jet water, check the
calibration and the proper functioning of the device.
Risk of ignition of flammable or explosive atmospheres!
– CAUTION: High off scale readings may indicate an explosive concentration.
(Only for instruments measuring combustible atmospheres.)
– WARNING: Do not open when energized
Polytron
Response time t20 can exceed the limits of EN 50104 for small concentration
changes.
2.6.1

Maintenance

– The maintenance intervals must be established for each individual installation.
Depending on safety considerations and application specific conditions the
instrument is used in, these might need to be shortened.
– Refer to the maintenance section in the transmitter instructions for use.
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Technical Manual
Dräger Polytron
®
8310 IR:
®
8xx0.
®
8100 EC-specific:
®
8000 Series
Safety-related information
13