Sper Scientific 840034 Psychrometer - Anemometer - Manual (Page 17)

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TROUBLESHOOTING
Meter is on, but there is no display
1. Make sure that the
Power button has been pressed long
enough to turn on the unit.
2. Check and/or replace the batteries. Be sure there is
good contact and that the polarity is correct.
3. Remove batteries for one minute. Replace them, and try
again.
Display disappears
1. Check to see whether low battery indicator appeared
before display disappeared. If yes, replace batteries.
2. Turn on the meter by holding the
Power button and the
Mx/Mn button simultaneously for more than two se-
conds. This will turn on the meter and disable the auto
power off function of the meter.