Case and box
pressure voltmeters, model 1 to 5, are
used to measure linear voltage (phase to
phase). The followings should be
of charged batteries
Making sure of dried fiber glass and voltmeter.
Testing before use
Get help to hold voltmeter and connect it to the current.
Do not use voltmeters individually
Use insulated length increaser
Disconnect voltmeter immediately after reading
First connect the voltmeter to the earth without current and then connect the other part to the current.