10-22
Chapter 10: Status Messages, Troubleshooting
42/24-10 EN Rev. 9
Uras26 Problems
Temperature Problem
Faulty temperature
sensor or heater
connections
•
Check the connecting lines and plugs.
•
Check the line seating in the insulated jackets.
Defective thermal link
•
Check thermal link continuity and replace if necessary.
Unstable Readings
Vibration
•
Take measures to reduce vibration.
Permissible vibration levels: for analyzer max.
±
0.04 mm at 5 to 55 Hz, 0.5 g at
55 to 150 Hz; when installed in cabinet max. 0.01 ms
–2
at 0.1 to 200 Hz.
•
Increase the low pass time constant T90 (see page 7-A-5 for instructions).
Gas path leakage
•
Check the integrity of the analyzer module gas paths and (if applicable) of the
lines to the gas module (see page 9-2 for instructions).
Loss of sensitivity
•
Check the sensitivity variation:
Indication < 75%: The “Maintenance request” status signal appears.
The detector involved will need to be changed soon.
Indication < 50 %: The “Failure” status signal appears.
Replace the detector involved.
•
Remove the emitter.
The emitter temperature is approx. 60 °C in the thermostat version of the
Uras26!
Uneven emitter
modulation
•
Check if the chopper wheel turns smoothly.
•
Check the clamp ring seating.
•
The chopper wheel should not extend beyond the notch.
•
Have the emitter and modulator assembly checked by the service department.
