User Manual

1587 FC/1587/1577

Calibration Manual

7. Turn the rotary switch to OFF to reset the display.

Power Supply

UUT (Rear)

6.0 Vdc

Power Supply

UUT (Front)

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Figure 9. Low-Battery Test Connections

Low-Battery Test - INSULATION Function

The following procedure verifies the accuracy of the low-battery indicator ()

during insulation operation.

XWWarning

To avoid shock hazard DO NOT press  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 () 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  appears on the display when the supply voltage

reaches 4.0 V.

Note

 will appear in the lower display.  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.