Calibration
6–32
1502C MTDR Service Manual
123
U2010
CR2015
CR2011
CR2012
J2010
TP2010
(+) CR2012
Figure 6–51: CR2012 on Power Supply Board
10. Turn the 1502C POWER on. The instrument should initialize and go into
normal operation. The display will be normal except ac in the upper left corner
will have changed to bat.
O
F
F
O
F
F
O
F
F
O
N
bat 0.000 ft
Figure 6–52: Display Showing Power is Battery
11. Reduce the output voltage of the DC power supply until bat/low appears in the
upper left corner of the display.
O
F
F
O
F
F
O
F
F
O
N
bat/low 0.000 ft
Figure 6–53: Display Showing Battery Voltage is Low
12. Verify that the DC supply voltage is between 10.6 and 11.0 VDC.
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