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No sensor or bad contact There is no sensor in the active sensor slot. Plug in a sensor or deactivate the channel.
#100: The sensor has been removed or there is a
bad contact in the sensor connector.
Switch the instrument off and on again, and /or
remove sensor and insert again, page 79.
Temperature out of range, incr. meas. failure The sensor was/is too cold. The sensor must be calibrated or adjusted.
Temperature out of range, incr. meas. failure The sensor was/is too warm. The sensor must be calibrated or adjusted.
No valid TC span calibration The CAT-Ex sensor has been calibrated in the
Vol% range (>100% LEL) with a CH
4
concentration which was too low (e.g. with
2 Vol.-% CH
4
)
Repeat calibration in the TC range (>100% LEL)
with a concentration of about 50 Vol.-%.
Channel error An error has been detected in the measuring
channel.
#109: An error occurred during loading of the
sensor data.
Switch the instrument off and then on again, or
remove and reconnect the power pack. If the fault
is still displayed, contact DrägerService.
Checksum error: instrument init. The instrument has detected an internal error. Carry out basic initialisation (see page 41).
Note: all settings made with the menu will reset to
the factory settings.
#1: Carry out instrument initialisation, switch the
instrument off and on again or remove and
reconnect the power pack.
Internal com error with subsystem 3 The data connection to the power pack is open-
circuit (the screws are perhaps not tightened
correctly).
Remove the power pack and connect it correctly.
Invalid fresh air calibration The air in which fresh-air calibration was carried
out was not free of contamination
(e.g. CO content too high).
Repeat fresh-air calibration in clean air.
Nitrogen was used for fresh-air calibration. Repeat fresh-air calibration in clean air.
Invalid mixed gas calibration The results of mixed-gas calibration were invalid
(possibly a sensor at the end of its life).
Inspect the sensors and replace any faulty ones.
Mixed-gas calibration for O
2
sensor was carried
out with a mixed gas which did not contain O
2
.
Use a suitable test gas and compare the
concentration information on the test gas
cylinder with the concentration specified for the
instrument.
Fault Cause Remedy
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