ETS-Lindgren HI-1501 Microwave Oven Survey Meter - Manual (Page 15)

HI n 1501 Manual Page — 7
[formerly NBS]) through FDA/CDRH (Food and Drug
Administration / Center for Devices and Radiological
Health).
Maintenance
The only maintenance that is required is the replacement
of the batteries or the spacer cone, should it become
damaged or worn. Both items may be purchased from
Holaday Industries, Inc.
NOTE:
Do not use the HI-1501 without the spacer in position.
To maintain stated instrument accuracy, use only spacer
cones provided by Holaday.
Battery Replacement
Turn the selector switch OFF. Unsnap the two clips
that hold the cover in place. Always replace both
batteries at the same time. Any nine (9) volt alkaline
(or the optional, rechargeable NiCad) battery may be
used. Replace batteries and reinsert the meter
assembly into the cover being careful to not crimp the
battery wires between the front panel and the cover.
After replacement, turn the selector switch to BATT
TEST. If the meter does not immediately indicate full
scale, check the condition of each battery to assure
that they are in good condition or fully charged.
Spacer Cone Replacement
The spacer cone must be replaced when worn or
contaminated. Simply remove the old cone by pulling
straight off the end of the probe. Slip a new cone on,
being sure the cone is fully seated on the probe. A
polystyrene cone shield is available which provides
protection for the relatively soft material of the cone.