Quickstart - Extech Instruments 7470 Operation Manual

3.3 Quickstart

Locate a suitable testing area and be sure you have read all safety instructions for the
operation of the instrument and suggestions on the test area set-up in the Safety
section. Locate a three prong grounded outlet. Be sure the outlet has been tested
for proper wiring before connecting the instrument to it.
the instrument. Connect the male end of the plug to the outlet receptacle. Please be
sure that the safety ground on the power line cord is not defeated and that you are
connecting to a grounded power source.
Turn on the POWER switch located on the lower left-hand side of the front panel. The
initialization screen will appear. The initialization screen will appear as follows:
EXTECH HIGH WITHSTAND
VOLTAGE TESTER
747X VER : X.XX
After the initialization screen disappears, the Settings screen will be displayed. The
Settings screen will appear as follows:
The High Withstand Voltage Tester comes with all of the memories loaded with the
withstand default parameters. The initial test loaded for use is Memory 1. If this test
is unacceptable for your DUT then refer to the section 5. Test Parameters Setup
Procedure, for instructions on how to program tests into the instrument.
If these parameters are acceptable, then connect an appropriate set of test leads to the
device under test (DUT) or test fixture. Connect the return lead (Black alligator clip
insulator) to the DUT or test fixture then connect the high voltage output lead (Red
alligator clip insulator). Make sure the safety ground of this instrument is connected to
a known good ground.
Refer to section 4.1.5 Smart GFI, for an explanation of DUT grounding configurations.
This instrument is supplied with a high voltage test lead terminated with an alligator clip.
This clip is designed to allow firm connection to the DUT without the need for an
operator to hold a probe or lead in place during the test. This clip and insulator will
This quick start guide assumes the operator has some familiarity
with automated Electrical Safety testing.
Check to be sure that the correct input line voltage has been
selected on the rear panel, either 115 volts AC or 230 volts AC.
Connect the power-input plug into its socket on the rear panel of
M XX Set
XX.XX KV
DO NOT TOUCH THE DEVICE UNDER TEST, HIGH VOLTAGE
TEST LEAD, ALLIGATOR CLIP, OR CLIP INSULATOR ONCE
THE TEST HAS BEEN STARTED.
Note: X = Numeric.
XXX.X s
X.XXX xA
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