Replacing The Battery; Testing Fuses; Replacing Fuses - Test Equipment Depot 88 Service Manual

2. Dress the battery leads so that they will not be pinched between the case top and
bottom.
3. Ensure that the gasket remains secured to the case bottom.
4. Starting with the two snaps at the display end and finishing at the terminal end,
cradle the case top into the gasket.
5. Reinstall the three screws from the case bottom.
6. Execute the PERFORMANCE TEST procedures later in Chapter 3.
3-7.

Replacing the Battery

To avoid false readings, which could lead to possible electric
shock or personal injury, replace the battery as soon as the
battery indicator (B) appears.
The meter is powered by a single 9 V battery (NEDA 1604, 6F22, or 006P). Referring to
Figure 3-1, perform the following procedure to replace the battery:
1. Remove the Meter case as described previously under "Disassembling the Case".
2. Lift the battery from the case bottom, and carefully unsnap the battery from the
battery connector.
3. Snap the battery connector to the terminals of a new battery and reinsert the battery
into the case bottom. Dress the battery leads so that they will not be pinched between
the case bottom and case top.
4. Reassemble the Meter as described under "Reassembling the Case".
3-8.

Testing Fuses

Perform the following procedure to test the internal fuses of the Meter.
1. Set the Meter rotary switch to m Ω.
2. Plug a test lead into the z input terminal, and touch the probe to the A input
terminal. Because the receptacles of the input terminals contain split contacts, be
sure that you touch the probe to the half of the receptacle contact that is nearest the
LCD.
3. The display should read between 00.0 and 00.5 ohms. This tests F2 (15 A, 600 V). If
the display reads OL (overload), replace the fuse and test again. If the display reads
any other value, further servicing is required.
4. Move the probe from the A input terminal to the mA input terminal. Touch the half
of the receptacle that is nearest the LCD.
5. The display should read between 0.995 kΩ and 1.005 kΩ. This procedure tests F1 (1
A, 600 V). If the display reads a high resistance or OL (overload), replace the fuse
and test again. If the display reads any other value, further servicing is required.
3-9.

Replacing Fuses

To prevent equipment damage or injury, install ONLY specified
replacement fuses with the amperage, voltage, interrupt, and
speed ratings listed in the List of Replaceable Parts later in this
manual.
WWarning
Warning
Maintenance
Operator Maintenance
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