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Fault number
Cause
# 129
Electrolyte liquid evaporates
The function » Sensor lock « is active or a
sensor with a different Part No. has been
inserted.
# 134
Bad contact between the sensor and
the sensor card.
# 136
Sensor hardware fault.
Warning number
Cause
# 1
Data error in the unit. Certain functions
such as the Datalogger or the dongle func-
tions may not be available.
# 51
Datalogger is in stack mode and is 100 %
full. No more data can be recorded.
# 52
Datalogger is in stack mode and is 90 %
full.
# 53
No valid date and/or time is set.
# 58
Software dongle was removed without log-
ging off.
Hardware fault in the software dongle.
# 59
Pump worn.
# 64
Pump gas flow falls below the warning
threshold. Reliable measurements are no
longer possible.
# 106
Increased zero point offset.
# 111
Sensor is not working in the specified tem-
perature range.
# 112
Sensor near end of life.
# 114
Calibration interval expired.
# 115
Sensor was operated for too long with a
high concentration.
# 119
Sensor is not yet fully warmed up. An
increased measuring error must be
expected.
9023927 - 2nd edition - May 2007
Remedy
If the problem persists, fit a new sensor, page 23.
Deactivate the function » Sensor lock «, page 57 or use a
sensor with the same Part No. as the one which
was removed.
Check the sensor contacts. Remove and re-install the sensor
several times. If the problem persists, fit a new sensor,
page 23.
Remove the sensor and install it again. If the problem per-
sists, fit a new sensor, page 23.
Remedy
Initialise the unit with the menu items » Settings «,
» Instrument «, » Init. device «, page 49.
If this error occurs again: Have the Polytron 7500 checked
by suitably qualified persons e.g. service personnel from
Dräger Safety.
Read out the data. Then clear and restart the Datalogger
Read out the data as soon as possible. Then clear and
restart the Datalogger.
Set the date and time, page 48.
Deactivate the function in the menu » Settings «,
» Instrument «, » SW dongle «, » XXX dongle «, page 50.
Change the software dongle, page 15.
Replace the pump, page 25.
Check the hoses for blockages, If necessary adjust pump
flow.
Zero point calibration, page 39.
Operate sensor in the specified temperature range (see
Instructions for Use for the DrägerSensor).
Replace the sensor, page 23.
Recalibrate the unit, page 22.
Reduce overgassing.
Wait until the sensor has fully warmed up.
Fault – Cause – Remedy
Page 29 of 72 Pages
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