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Chapter 5
Troubleshooting
The table below list the symptoms, possible causes and recommended
solutions for common problems encountered with the Q-T
RAK
.
Symptom
Possible Cause
Corrective Action
No Display.
Unit not switched on.
Low or dead batteries.
Lockout switch enabled
Dirty battery contacts.
Switch unit on.
Replace the batteries or plug in
the AC adapter.
Disable lockout switch
Clean the battery contacts.
Battery
symbol is
displayed
(constant or
blinking).
Low battery charge.
Incorrect AC Adapter.
Low AC line Voltage.
Dirty battery contacts.
Replace batteries or use AC
Adapter.
Replace with the correct AC
Adapter.
Correct the AC line voltage or
use batteries.
Clean the battery contacts.
Display
reads
“MEMORY
0%.”
Memory is full.
Download memory to a PC if
desired, then clear memory.
Humidity
reading near
zero or not
believable.
Probe exposed to intense
light.
Shade the probe while taking
samples.
Cannot enter
calibration
mode.
DIP switch(s) set to
factory calibration.
Not in Survey mode.
Sample is in progress.
Change DIP switch setting. See
Appendix B.
Change to Survey mode.
Stop sample in progress.
Incorrect
function
displayed.
Two keys have been
pressed at the same time.
Press only one key at a time.
