Multimeters
Performance Tests
15
3. Then test the mA µA input fuse (0.440 A) by inserting the plug end of the test lead
into the
mA
µ
A input.
The beeper emits an Input Alert tone if the fuse is good.
If the Meter fails to operate properly:
• Check the battery and fuses and replace as needed.
• Verify that you are operating the Meter correctly by reviewing the operating
instructions found in the Users Manual.
To complete a comprehensive performance test and verify the accuracy of each Meter
function and operation, perform the remainder of the tests under “Performance Tests”.
Testing the Display
Turn the Meter on and press any push-button to hold the Meter in Display Test mode.
Compare the display with the appropriate example in Figure 4.
83
85
MULTIMETER
TRUE RMS MULTIMETER
III
III
87
TRUE RMS MULTIMETER
III
ek9f.eps
Figure 4. Display Test
Testing the Rotary Switch
This test verifies the operation of the rotary switch function selector.
The function selector circuit relies on the interface between a ptf region on the circuit
assembly and a rotating contact assembly on the switch shaft. The rotary switch test
exercises this interface by checking the various range codes and displaying their
representative numbers.
To perform the rotary switch test, do the following:
1. Hold down Kwhile turning the rotary switch from
OFF to L.
2. Release K.
Normal Meter functions are now disabled, and a number appears in the display.
3. Compare the number on the display with the number for the V dc (L) function in
Table 3.
The display should read -32 (±12).
4. Repeat this test for each position on the rotary switch.
5. To exit the rotary switch test mode, turn the rotary switch to
OFF, then back to any
function selection.
To Next Page
Loading...
Need help?
General
