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The Guardian 2500 Hipot Tester can provide an output voltage as high as 6000VDC (5000VAC)
to the external device under test (DUT). Although the Guardian unit is designed with full
attention to operator safety, serious hazards could occur if the instrument is used improperly and
these safety instructions are not followed.
1.
The Guardian 2500 unit is designed to be operated with its chassis connected to earth
ground.
The instrument is shipped with a three-prong power cord to provide this
connection to ground. This power cord should only be plugged into a receptacle which
provides earth ground. Serious injury can result if the Guardian 2500 is not connected to
earth ground.
2.
When connecting test leads to the instrument make sure the RETURN lead is secured
tightly with the BNC connector locked in the cw direction, and the HIGH VOLTAGE
lead secured tightly with the threaded connector in a cw direction.
3.
Never touch the test leads, test fixture or DUT in any manner (this includes insulation on
all wires and clips) when the high voltage is applied and the HIGH VOLTAGE light is
on.
4.
Before turning on the Guardian unit, make sure there is no device (DUT) or fixture
connected to the test leads.
5.
After each test, press the STOP (red) button for safety. This terminates the high voltage
being applied to the output terminals.
6.
When the HIGH VOLTAGE light is flashing (or constantly lit on some later units),
NEVER touch the device under test, the lead wires or the output terminals.
7.
Before touching the test lead wires or output terminals make sure :
a) The red STOP button has been pressed.
b) The HIGH VOLTAGE light is not flashing (or not lit).
8.
Do NOT short the output terminal to the ground line or AC power line. The instrument
could then be charged up to a dangerously high voltage.
9.
In the case of an emergency, turn OFF the POWER switch using the eraser tip of a
pencil or "hot stick" and disconnect the AC power cord from the wall. DO NOT TOUCH
THE INSTRUMENT.
10.
If the HIGH VOLTAGE light does not go off when the STOP button is pressed,
immediately stop using the tester and power the instrument down.
11.
When the Guardian 2500 instrument is used in remote control mode, be extremely
careful. The High Voltage Output is being turned on and off with an external signal.
Should the HIGH VOLTAGE light ever malfunction, a changing time display, shown in seconds (lower right
corner of front panel LCD display), is also an indication that high voltage is being applied to the output
When programming the Guardian 2500 for high test voltages it is recommended to program a voltage ramp time
(typically > 1 sec). This is intended to prevent any possible high voltage transients across the output resulting from
inductive kickback of the instrument's high voltage transformer.
Safety Precautions
WARNING
terminals.
CAUTION
Page 17 of 17
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