Low-Battery Test - Insulation Function - Fluke 1587 Calibration Manual

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Calibration
Power Supply

Low-Battery Test - INSULATION Function

The following procedure verifies the accuracy of the low-battery indicator (b)
during insulation operation.
To avoid shock hazard DO NOT press t during the
following procedure.
1. Remove the batteries from the battery compartment.
2. Connect a 6-volt adjustable Power Supply between the positive and negative
battery terminals of the UUT as shown in Figure 9-A.
3. Set the Power Supply output to 6 V, and turn the rotary switch to INSULATION.
4. Slowly turn the Power Supply output down while observing the display on the
UUT. Verify that the low-battery indicator (b) appears when the voltage is at
5.2 V
5. Continue to reduce the Power Supply output while observing the display on the
UUT. Verify that bAt appears on the display when the supply voltage reaches
4.0 V.
bAt will appear in the lower display. bAtt will still appear in the
prinmary display when the supply reaches 3.5 V just as it does in DMM
functions.
6. Turn the rotary switch to OFF to reset the display.
7. Remove the Power Supply, and install the batteries and the battery door.
22
UUT (Rear)
6.0 Vdc
A
Figure 9. Low-Battery Test Connections
XWWarning
Note
UUT (Front)
Power Supply
LO
B
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