7
OPERATING INSTRUCTIONS
The DDPM-40 Dual Display Phasing
Voltmeter measures DC and AC RMS voltage
from 5V to 25kV line-to-ground at 25-1000Hz
and up to 43kV line-to-line at 50/60Hz.
Press the ON button on both units to turn
them on. The initial zero kV indication will
be replaced shortly with the display of
hollow zeros as a battery saving measure.
A low battery indication in the lower
right corner of the screen indicates
that the battery will need to be replaced
soon. If the battery dies completely,
the display will shut off. The battery
compartments are on the
bottom of each unit. HD Electric
recommends using 9V lithium
batteries but alkaline batteries
may also be used.
Both displays will turn off after
two minutes of a zero display.
BATTERY REPLACEMENT
INSTRUCTIONS
To replace the battery, open
and remove the compartment
on the bottom of the meter
housing. Remove and dispose
of the old battery, replacing it
with a fresh, new 9-volt lithium
or alkaline battery.
Note battery polarity on the
battery compartment. This
compartment cannot be reinserted
if the battery polarity is reversed.
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