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.
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