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3.3.2
Front Panel Fuse Replacement
WARNING: Make sure the instrument is disconnected from the power line and other equipment
before replacing the fuse.
1. Turn off the power and disconnect the power line and test leads.
2. From the front panel, use a screwdriver to rotate the fuse carrier several turns counter-clockwise. Take
the fuse carrier out of the socket.
3. Remove the fuse and replace it with the same type (T2AL, 250V, 5×20mm）.
CAUTION:
Do not use a fuse with a higher current rating than specified or instrument damage may
occur. If the instrument repeatedly blows fuses, try to find out the reason before
replacing the fuse.
4. Install the new fuse by reversing the procedure above.
3.4
Measuring Resistance
Model DMM Resistance measurement range: 100Ω, 1kΩ, 10kΩ, 100kΩ, 1MΩ, 10MΩ, 100MΩ; Maximum
resolution: 1mΩ (on 100Ω range)
3.4.1
Connections
Assuming Model DMM is under factory default conditions, the basic procedure is as follows:
1. Connect test leads to the Model DMM as follows:
For Ω2-wire, connect the test leads to INPUT HI and LO.
A:
B: For Ω4-wire, connect the test leads to INPUT HI and LO, and SENSE Ω 4W HI and LO. Kelvin test
probes are recommended.
2. Select Ω 2-wire or Ω 4-wire measurement function by pressing Ω2W or Shift → Ω2W
3. Press
toggles auto ranging. Notice the AUTO annunciator is displayed with auto ranging. If you
A u t o
want manual ranging, use the RANGE
consistent with expected resistance.
4. Connect test leads to the resistance as shown in Figure 3-3:
CAUTION:
Do not apply more than 1000V peak between INPUT HI and LO or instrument damage
may occur.
5. If the "OVR.FLW" message is displayed, press up
reading is displayed (or press Auto key for auto ranging). Use the lowest possible range for the best
resolution.
6. Take readings from the display.
and
keys to select a measurement range
key to select a higher range until a normal
ABM-4082
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