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THE CASE. TO AVOID DAMAGING THE METER HOUSING, NEVER APPLY SOLVENTS TO THE
METER. IF THE METER REQUIRES CLEANING, WIPE IT DOWN WITH A CLOTH THAT IS
LIGHTLY DAMPENED WITH WATE OR A MILD DETERGENT. DO NOT USE AROMATIC
HYDROCARBONS, CHLORINATED SOLVENTS, OR METHANOL-BASED FLUIDS WHEN
WIPING DOWN THE METER.
THE LINE FUSE
OPENING THE CASE MAY EXPOSE HAZARDOUS VOLTAGES. ALWAYS DISCONNECT THE
POWER CORD AND MEASURING INPUTS BEFORE OPENING THE CASE.
1.
Remove the screw
2.
Remove the case from the meter. The fuse is visible at the front of the main printed circuit
assembly near the power. The meter uses a 0.2A, 250V (Slow blow) line fuse.
3.
Carefully remove the fuse and replace it with one rated as listed above
4.
Reverse the disassembly procedure to reassemble the meter.
CURRENT INPUT FUSES
300mA (include 300mA) and 10A inputs are protected by user-replaceable fuses.
The 300mA input is protected by a fuse rated at 500mA, 250V (Fast blow).
The 10A input is protected by a fuse rated at 11A, 250V (Fast blow).
Testing Current Input Fuses
Perform the following procedure to test these fuses:
1.
Short the VΩ
2.
Press Ω to select the ohms function. Insert the test lead probe into the mA input terminal. If the
fuse is good, the meter will read between 1Ω to 19Ω. If the fuse is blown, the meter will
read >10MΩ to OL.
3.
Remove the test lead probe from the mA input terminal and insert it into the 10A input terminal. If
the fuse is good, the meter will read between 0.00 and 0.05Ω. If the fuse is blown, the meter will
read >10MΩ to OL.
Replacing the mA Input Fuse
FOR PROTECTION AGAINST FIRE, REPLACE A BLOWN FUSE ONLY WITH ONE OF
IDENTICAL
The mA input fuse is mounted in the front panel input jack (see Figure 3-2). To replace this fuse, first
unplug the line cord. Then press in on the input jack and turn it 90 degrees counter-clock wise, slide
out the fuse holder and fuse.
Replace a blown fuse with one of identical rating and reinsert the fuse and holder into the input
terminal socket. Secure the fuse holder by pressing in and turning the holder 90 degrees clockwise.
Replacing the 10A Input Fuse
OPENING THE CASE MAY EXPOSE HAZARDOUS VOLTAGES. ALWAYS DISCONNECT THE
POWER CORD AND MEASURING INPUTS BEFORE OPENING THE CASE.
The 10A input fuse is located inside the meter. To replace the fuse:
1.
Remove the screw on the bottom of the case.
2.
Remove the case from the meter. The fuse is visible on the main printed circuit, which is
connected with the 10A input terminal.
3.
Carefully remove the fuse and replace it with one rated as listed above.
4.
Reverse the disassembly procedure to reassemble the meter.
PERFORMANCE TESTS
The meter should be calibrated and in operating condition when you receive it.
CAUTION
on each side of the real
input terminal and the mA terminal with a test lead.
CAUTION
CAUTION
bezel.
13
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