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VM700T Option 01 (NTSC) & Option 11 (PAL) User Manual
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Installation
This section contains information about preparing the VM700T Video Measure-
ment Set for operation.
Power Requirements
The measurement set operates with line frequencies of 50 Hz or 60 Hz, over two
line voltage ranges. The nominal setting of the low voltage range is 115 VAC.
The nominal setting of the high voltage range is 230 VAC.
There are two power switches on the measurement set; one is on the rear panel to
the right of the power cord receptacle, and one is on the front panel.
Both must
be on
to operate the instrument. The rear-panel switch is the master power
switch. The switch on the front panel remotely enables the voltage supply
outputs.
WARNING.
Dangerous voltages are present within the Power Supply module
when the rear-panel power switch is on, regardless of the position of the
front-panel power switch. Do not operate the measurement set with any covers
removed. Refer all servicing of the instrument to a qualified service person.
The voltage range selection switch and fuse holder are located in the lower left
corner of the rear panel (see Figure 1--1). The measurement set is shipped from
the factory set for the operating voltage of the destination nation (115 VAC or
230 VAC). If the setting is not correct as received, it must be changed before
connecting the power cord to the power source. Simply set the voltage range
selection switch (located on the rear panel of the measurement set) to the correct
position for operation.
CAUTION.
When changing the line voltage selector switch you must also change
the fuse to provide proper protection for the operating voltage in use. The 3A
slow-blow fuse provides the proper protection in the 230 VAC range and the 6A
slow-blow fuse provides protection for operation in the 115 VAC range.
A detachable three-wire power cord with a three-contact plug is provided with
each instrument for connecting to both the power source and protective ground.
The protective-ground connector in the plug connects (through the protective-
ground conductor) to the accessible metal parts of the instrument. For electrical-
Changing Line Voltage
Range and Fuse
Power Cord
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