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Calibration
22
LO
A
Power Supply
UUT (Rear)
6.0 Vdc
Power Supply
UUT (Front)
B
ebp08f.eps
Figure 9. Low-Battery Test Connections
Low-Battery Test - INSULATION Function
The following procedure verifies the accuracy of the low-battery indicator (
b
)
during insulation operation.
XW
Warning
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.
Note
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.
