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Safety Precautions
WARNING
The Sentry Plus Series Hipot Tester can provide an output voltage as high as 6000V DC (5000V
AC) to the external device under test (DUT). Although the Sentry Plus 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 Sentry Plus unit is designed for operation 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 in to a receptacle that provides earth
ground. Serious injury can result if the Sentry Plus is not connected to earth ground.
2. Tightly connect cable(s) to the (blue) RTN/LOW terminal. If this is not done, the
DUT’s casing can be charged to the high voltage test level and serious injury or electrical
shock hazards could result if the DUT is touched.
3. Never touch the metal of the High Voltage probe directly. Touch only the insulated parts
of the lead(s).
4. 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 red DANGER light is ON.
5. Before turning on the Sentry Plus unit, make sure there is no device (DUT) or fixture
connected to the test leads.
6. After each test, press the [STOP] (red) button for safety if there is any concern that HV
may still be applied to the output terminals.
7. When the red DANGER LED is lit or flashing, NEVER touch the device under test, the
lead wires or the output terminals.
8. Before touching the test lead wires or output terminals make sure:
a) The red [STOP] button has been pressed
b) The red DANGER LED is OFF.
9. In the case of an emergency, turn OFF the POWER switch using a “hot stick” and
disconnect the AC power cord from the wall. DO NOT TOUCH THE Sentry Plus
INSTRUMENT.
10. If the DANGER LED does not go off when the [STOP] button is pressed, immediately
stop using the tester. It is possible that the output voltage is still being delivered
regardless of the TEST ON/OFF control signal.
11. When the Sentry Plus instrument is used in remote control mode, be extremely careful.
The High Voltage Output is being turned on and off with an external signal.
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