Dräger Nitrox 200, Instructions For Use Manual

Page: 33 / 144

Nitrox 200 33
Troubleshooting
5 Troubleshooting
Error Cause Remedy
No display on the
pressure gauge Battery empty Replace battery.
Pressure vessel
valves or shut-off
valves closed Open pressure vessel
valves and shut-off
valves (see “Use” on
page
29).
Pressure vessel
reservoir empty Replenish pressure
vessel reservoir.
Pressure gauge faulty Have the pressure
gauge replaced by
qualified personnel.
Pressure gauge
inaccurate No zero offset
adjustment Conduct a zero offset
adjustment.
O
2
measurement
faulty
Pressure of the
pressure vessel too
low Build pressure vessel
pressure.
Flow rate in
measurement hose
too low Replace hose, have
the dosage system
replaced by qualified
personnel.
Measurement hose
defective or
incorrectly mounted Replace
measurement hose or
connect correctly.
Measuring device
faulty Consult the technical
manual.
Replace the
measuring device.
O
2
measurement
faulty
Fresh air calibration
not carried out or not
immediately prior to
measuring Carry out fresh air
calibration (see “Carry
out fresh air
calibration as follows:”
on page
30)
Gas analysis shut-off
valve closed Slowly open the gas
analysis shut-off
valve.
Non-return valves
leaking Return valves faulty Have the non-return
valves replaced by
qualified personnel.
Desired oxygen
content is not
achieved. Incorrect calculation Check calculation and
contact Dräger if
necessary.
Pressure vessel was
not depressurized. Calculate the current
pressure ratio based
on the measured
oxygen concentration
and generate the
desired concentration
through a specified
release and refilling of
oxygen or breathing
air. Or fully
depressurize the
container and refill
them in accordance
with the instructions
for use.
Error Cause Remedy