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ABM-4082
2.6
Power up
2.6.1
Power Line Connection
Follow the procedure below to connect the DMM to line power and turn on the instrument.
1.
Check to make sure that the line voltage is in the range of 198V to 242V (or 110V±10% ) and line
frequency is in the range of 47.5 to 52.5Hz (or 60Hz±5%) before connecting the power cord.
CAUTION: Operating the instrument on an incorrect voltage may cause damage to the instrument,
possibly voiding the warranty.
2.
Before plugging in the power cord, make sure that the front panel power switch is in the off position.
3.
Connect the female end of the supplied power cord to the AC receptacle on the rear panel. Connect the
other end of the power cord to a grounded AC outlet.
WARNING: The power cord supplied with the Model DMM contains a separate ground wire for use
with grounded outlets. When proper connections are made, instrument chassis is
connected to power line ground through the ground wire in the power cord. Failure to
use a grounded outlet may result in personal injury or death due to electric shock.
4.
Turn on the instrument by pressing the front panel power switch and get ready for measuring.
2.6.2
Power-up Sequence
On power-up, Model DMM performs self-tests on its EPROM and RAM and lights all segments and
annunciators for about 1 second. If a failure is detected, the instrument momentarily displays an error
message and the ERR annunciator turns on.
If the instrument passes self-tests, the firmware revision levels are displayed.
2.6.3
High Energy Circuit Safety Precautions
To optimize safety when measuring voltage in high energy distribution circuits, read and use the directions
in the following warning.
WARNIG:
Dangerous arcs of an explosive nature in a high energy circuit can cause severe
personal injury or death. If the multimeter is connected to a high energy circuit when
set to a current range, low resistance range, or any other low impedance range, the
circuit is virtually shorted. Dangerous arcing can result even when the multimeter is
set to a voltage range if the minimum voltage spacing is reduced in the external
connections.
When making measurements in high energy circuits, use test leads and accessories that meet the following
requirements:
Test leads and accessories must be fully insulated.
Only use test leads that can be connected to the circuit (e.g., alligator clips, spade lugs, etc.) for
hands-off measurements.
Do not use test leads or accessories that decrease voltage spacing. This diminishes arc protection
16
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