11
Chapter 5
Troubleshooting
Table 5-1 lists the symptoms, possible causes, and recommended
solutions for common problems encountered with the Alnor
AVM440/Airflow Instruments TA440. If your symptom is not listed, or
if none of the solutions solves your problem, please contact TSI.
Table 5-1: Troubleshooting the Alnor AVM440/
Airflow Instruments TA440
Symptom
Possible Causes
Corrective Action
No Display
Unit not turned on
Switch unit on.
Low or dead batteries
Replace batteries or
plug in AC adapter.
Dirty battery contacts
Clean the battery
contacts.
Velocity reading
fluctuates /
unstable
Fluctuating flow
Reposition probe in
less-turbulent section
or use longer time
constant.
Instrument Error
message appears
Memory is full
Download data if
desired, then DELETE
ALL memory.
Fault in instrument
Factory service
required on instrument.
W A R N I N G !
Remove the probe from excessive temperature immediately:
excessive heat can damage the sensor. Operating temperature limits
can be found in
Appendix A, Specifications
.
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