13
Other Considerations
Readings on the sensitive voltage, current and resis-
tance ranges may sometimes be different than calcu-
lated values. Thermo-electric or electro-chemical re-
actions can sometimes generate voltage (and current)
in a circuit due to elevated temperatures, contact of
dissimilar metals, chemical fumes or moisture. Also,
the user’s fingers should never touch the metal parts
of the test probes since body resistance can cause
erroneous readings - particularly on the high ohmme-
ter ranges.
Care
Although this instrument is portable and rugged, it
should be treated with care. Do not drop it or handle
it roughly.
Avoid placing it on a bench where machine tools are
used or severe vibration is encountered.
When possible, keep it in a place of moderate tem-
perature. Avoid subjecting it to extreme temperatures
and severe temperature changes.
If the tester has not been used for a long period of
time, rotate the switch in both directions several times
to clean the switch contacts.
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