4
User Modifications
Unauthorized user modifications will void your warranty. EXTECH Electronics will not be
responsible for any injuries sustained due to unauthorized equipment modifications or use of
parts not specified by EXTECH Electronics. Instruments returned to EXTECH Electronics
with unsafe modifications will be returned to their original operating condition at the
customers expense.
1.3.2 Test Station
Location
Select an area away from the main stream of activity which employees do not walk through in
performing their normal duties. If this is not practical because of production line flow, then
the area should be roped off and marked for
HIGH VOLTAGE TESTING
. No employees
other than the test operators should be allowed inside.
If benches are placed back-to-back, be especially careful about the use of the bench opposite
the test station. Signs should be posted: "
DANGER - HIGH VOLTAGE TEST IN
PROGRESS - UNAUTHORIZED PERSONNEL KEEP AWAY
."
Power
Dielectric Voltage-Withstand Test Equipment must be connected to a good ground. Be
certain that the power wiring to the test bench is properly polarized and that the proper low
resistance bonding to ground is in place.
Power to the test station should be arranged so that it can be shut off by one prominently
marked switch located at the entrance to the test area. In case of an emergency, anyone can
cut off the power before entering the test area to offer assistance.
Work Area
Perform the tests on a non-conducting table or workbench, if possible. If you cannot avoid
using a conductive surface, be certain that it is connected to a good earth ground and the high
voltage connection is insulated from the grounded surface.
There should not be any metal in the work area between the operator and the location where
products being tested will be positioned. Any other metal in the work area should be
connected to a good ground, never left "floating".
Position the tester so the operator does not have to reach over the product under test to activate
or adjust the tester. If the product or component being tested is small, it may be possible to
construct guards or an enclosure around the device to be tested. Construct the guards of a
non-conducting material such as clear acrylic, so that the item being tested is within the guards