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