A.W. Sperry Instruments SP-5A Mode D'emploi page 7

4) PREPARATION FOR USE
This procedure should be followed before each and every use.
CAUTION
Before attempting to use this meter be certain to read this
operating instruction thoroughly and completely. Failure
to follow these instructions may result in electrical shock,
instrument damage and/or damage to the equipment under
test.
1) Inspect the SP-5A Analog Multimeter for any signs of
Damage to the thermoplastic case. Do not use if cracked,
distorted, excessively dirty or any other abnormal condition
exist. Refer to Sec. 7.
2) Rotate the selector switch one full turn. Check that the
switch clicks into each of the 13 positions and has no excessive
play in each position. Do not use if the switch is loose. Refer to
sec. 7.
3) Inspect the TL-34 test leads for nay signs of damage. Check for
cracks in the insulation, broken or damaged probes, loose probe
pins or bent probe pins. Do not use if any abnormal conditions exist.
Refer to sec.7.
4) Place the SP-5A Analog Multimeter on a flat horizontal surface.
Using a small screwdriver adjust the "zero adjust" screw until the
meter movement pointer lines up with the "0" reading on the left
side of the scale plate.
5) Insert the black test led into the "-" terminal of the SP-5A and the
red test lead into the "+" terminal. Make certain that the leads are
seated all the way into the SP-5A and fit snuggly. If the fit feels loose
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