11
Chapter 5
Troubleshooting
Table 5-1 lists the symptoms, possible causes, and recommended
solutions for common problems encountered with the Alnor Model
AXD620/Airflow Instruments PVM620. If your symptom is not listed,
or if none of the solutions solves your problem, please contact TSI.
Table 5-1: Troubleshooting the Alnor Model AXD620/Airflow
Instruments PVM620
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.
Reading
fluctuates /
unstable
Fluctuating flow
Reposition probe in
less-turbulent flow or
use longer time
constant.
No response to
keypad
Keypad locked out
Unlock keypad by
pressing
keys
simultaneously.
Instrument Error
message appears
Memory is full
Download data if
desired, then DELETE
ALL memory.
Fault in instrument
Factory service
required on instrument.
WARNING!
The pressure sensor is protected from damage up to 7 psi (48 kPa or
360 mmHg). At higher pressure it can burst!
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