ETS-Lindgren HI-3520 Microwave Monitor (Archived) - Manual (Page 18)

Page 14 HI-3520 Manual
NOTE:
Should the unit exhibit any form of
unusual or erratic performance, or
doesn't turn on at all, proceed as
follows:
1. Turn the unit off.
2. Slide an insulator such as a piece of paper
between the plus battery clip and the battery.
3. Turn the unit on for five minutes.
4. Turn the unit off and then quickly slide out the
insulator.
5. Turn the unit on. The instrument should now
operate normally.
Once the unit is operating properly, replace the cover and
tighten the cover screw.
The instrument should now be operational and the one
minute beep and flash warning indicators should cease.
5.3 Trouble Shooting
NOTE:
In general, except for normal battery
replacement, trouble shooting and repair of this
instrument by the user is not recommended.
As a part of its self-test capability, the unit will produce
a tone and flash when it is turned on. In the event it fails
to do so, check the condition of the battery by replacing
it in accordance with the procedure described in section
Archived 4/2/10