Operating Instructions - Fluke 27 Service Manual

27
Service Manual
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Follow all equipment safety procedures.
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Before measuring current, check the meter's fuses (see "How to
Test the Fuse").
•
Never touch the probe to a voltage source when the test leads are
plugged into the 10 A or 40 mA input jacks.
•
To avoid false readings, which could lead to possible electric
shock or personal injury, replace the meter's battery as soon as
the low battery indicator (M) appears.
•
Avoid working alone.
•
Remove all surface water from the product including water
around, within and under the rotary knob, input receptacles and
buttons prior to connecting to any voltages.
To avoid possible damage to the meter or to equipment under
test:
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This manual presents service information for the Fluke 27 Multimeters. Included are a
theory of operation, general maintenance procedures, performance tests, calibration
procedures, troubleshooting information, a list of replaceable parts, and a schematic
diagram.

1-2. Operating Instructions

For operating instructions, refer to the Users Manual provided with the instrument at
time of purchase.
1-4
Disconnect the power to the circuit under test and
discharge all high voltage capacitors before testing
resistance, continuity or diodes.
Use the proper function and range for your measurement
applications.
When measuring current, turn off circuit power before
connecting the meter in the circuit. Remember to place the
meter in series with the current.
WCaution