HYPOT III QS Guide 08.qxd

DIELECTRIC WITHSTAND TESTERS

For the following models:

3705 (AC Hipot)

3765 (AC/DC Hipot)

3770 (AC/DC Hipot w/IR)

3780 (AC Hipot)

SAFETY CHECKLIST

KEEP unqualified/unauthorized personnel away from test area

ARRANGE test stations in a safe and orderly manner

NEVER touch products or connections during a test

TURN OFF high voltage first in the event of a problem

NEVER perform a test on energized circuitry or equipment

BE SURE to always connect the return test lead first

HANDLE test clips by insulation only, never touch clips directly

WARNING : THIS GUIDE WAS CREATED

FOR OPERATORS HAVING SOME

FAMILIARITY WITH HIPOT AND ELECTRICAL SAFETY

TESTING. A HIPOT TESTER PRODUCES VOLTAGES

AND CURRENTS THAT CAN CAUSE HARMFUL OR

FATAL ELECTRIC SHOCK. TO PREVENT ACCIDENTAL

INJURY OR DEATH, THESE SAFETY PROCEDURES

MUST BE STRICTLY OBSERVED WHEN HANDLING

AND USING A TEST INSTRUMENT.

FRONT PANEL CONTROLS

1 .

RESET BUTTON : Red momentary contact switch used to reset the instrument in case of a failure or to proceed to the next test. Also serves as an abort signal to stop any test in progress.

2 .

TEST BUTTON : Green momentary contact switch used to start tests.

3 .

GRAPHIC LCD : 128 x 64 monographic LCD.

4 .

SOFT KEYS : Multifunction parameter selection keys. Keys used to select screens and change parameters.

5 .

CONTINUITY OUTPUT JACK : Connection for the low current return lead used for continuity testing.

6 .

RETURN OUTPUT JACK : Connector used to attach the black return test lead to the instrument. This connection provides the return current path for the high voltage.

7 .

HIGH VOLTAGE OUTPUT JACK : Connector used to attach the red high voltage test lead or adapter box high voltage lead to the instrument.

8 .

HIGH VOLTAGE ON INDICATOR : Flashing indicator to warn the operator high voltage is present.

9 .

POWER SWITCH : Rocker style power switch with International

ON ( I ) and OFF (O) markings.

1

BACK PANEL CONTROLS

1 .

REAR PANEL OUTPUT JACKS : These jacks can be used instead of the front panel jacks. For interconnection to a ground bond tester or for installation into a rack mount system.

2 .

FUSE RECEPTACLE : Socket for the input power fuse. See operation and service manual for ratings and replacement instructions.

3 .

INPUT POWER RECEPTACLE : Standard IEC 320 connector for connection to a standard NEMA style line power (mains) cord.

4 .

CHASSIS GROUND (EARTH) TERMINAL : This terminal should be connected to a good earth ground before operation.

5 .

INPUT POWER SWITCH : Line voltage selection is set by the position of the switch. In the left position it is set for 115 volt operation, in the right position it is set for 230 volt operation.

6 .

CALIBRATION BUTTON : Used to put the instrument into calibration mode.

7 .

REMOTE SIGNAL INPUT : 9-Pin D sub-miniature male connector for remote control of test, reset, and interlock functions, as well as remote program memory selection.

8 .

REMOTE SIGNAL OUTPUT : 9-Pin D sub-miniature female connector for monitoring pass, fail, processing and reset out output relay signals.

9 .

RS-232 Interface : Standard connector for RS-232 interface.

Note: The layout of the back panel controls differs for model 3780.

2

SYSTEM SETUP

WARNING : LOCATE A SUITABLE TESTING AREA WITH A THREE-

PRONG, GROUNDED OUTLET. BE SURE THAT YOUR THREE-PRONG

OUTLET HAS BEEN TESTED FOR PROPER WIRING. ALSO, MAKE SURE YOU READ

THE SAFETY CHECKLIST OF THIS GUIDE BEFORE STARTING TO TEST.

1.

Choose the correct input line voltage on the rear panel of the instrument, either 115V AC or 230V AC.

2.

Connect the power-input plug into the rear of the instrument and plug the male end of the cord into a grounded power source.

3.

Plug the interlock connector into the signal/input connector on the rear panel of the instrument.

4.

Turn the POWER switch to ON.

The initialization screen will appear. After three seconds the Perform Test

Screen will appear as shown below.

(Perform Test Screen)

The Hypot ® III is automatically set to run an AC hipot test at default parameters.

To read the complete settings choose MENU.

CHANGING THE TYPE OF TEST TO PERFORM

(Models 3765 AC/DC and 3770 AC/DC/IR only)

From the Perform Test screen press MENU twice then choose TEST.

Select EDIT to adjust your test type.

Use the

+ or

soft keys to choose test type (ACW, DCW or IR).

Press ENTER then EXIT twice to return to the Perform Test screen.

3

PERFORMING A GROUND CONTINUITY TEST

Many safety standards require a ground continuity test to be performed as a routine production line test with a hipot test. This test is performed on Class I products (terminated in a three-prong line cord) to verify continuity of the ground (earthing) conductor to the exposed or dead metal of the device under test. This test is easily performed on Class I products through the use of the adapter box (P/N 36544) provided with the instrument and the ground return lead.

To enable this function, first set the instrument to run either an AC or DC hipot test.

Choose MENU from the Perform Test screen.

Select MENU then TEST from the Settings screen.

Select Continuity by scrolling with the UP and DOWN soft keys.

Press EDIT and use the + or - soft keys and select ON.

Press ENTER then EXIT twice to return to the Perform Test screen.

CHANGING TEST SETTINGS

If the default settings do not apply to your specification, the test parameters are fully adjustable. Common parameters that can be adjusted include

VOLTAGE, MAX. LIMIT, MIN. LIMIT, RAMP UP and DWELL among others.

(Test Settings Screen)

ADJUSTING DEFAULT TEST SETTINGS

Choose MENU from the Perform Test screen.

Select MENU then TEST from the Test Settings screen.

Select a parameter to edit by scrolling with the UP and DOWN soft keys.

Press EDIT once you have chosen the correct parameter.

Use the + or - soft keys to adjust the parameter value.

Press ENTER then EXIT twice to return to the Perform Test screen.

4

DUT CONNECTION

ADAPTER BOX CONNECTION

The adapter box is an easy way to connect a Device Under Test (DUT) that terminates in either a two or three-prong line cord. The following diagram shows how to connect the adapter box to the instrument and the DUT. If you are testing a Class I product, you may elect to perform a continuity test on the ground circuit of the DUT along with the hipot test.

DUT

36544

RTN

CONT HV

For this set up to run, you must enable the ground continuity test in the test parameters screen as described in the system setup section.

Plug the black cord from the adapter box into the Continuity Check jack and the white cord from the adapter box into the H.V. jack located on the front panel.

Plug the black ground return lead into the Return jack also on the front panel of the instrument.

Connect the ground return clip to dead metal on the chassis of the DUT.

Always check to make sure a good connection is made between the DUT and the return clip.

Plug the line cord of the DUT into the adapter box receptacle.

NOTE : The rear output jacks on the Hypot ® III may also be used instead of the front panel jacks.

5

TEST LEAD CONNECTION

For testing a Class II product the continuity function must be OFF. Use the provided test leads with alligator clips (H.V. and Return) to attach your product to the instrument.

Connect the black ground return lead to the return jack and the red high voltage lead to the H.V. jack both located on the front (or rear) panel of the instrument.

Connect the ground return clip to exposed or dead metal located on the chassis. If your chassis does not have any exposed metal, you can wrap the enclosure of the DUT in foil and the return lead can be connected to the foil.

Always connect the ground return clip first and double check that it has a solid connection to the DUT.

Connect the H.V. clip to the current carrying conductors of the DUTs circuitry.

-

DUT

+

CONDUCTING A TEST

The Hypot ® III is equipped with a Remote Interlock feature, which utilizes a set of closed contacts to enable the instrument’s output. This feature may be bypassed by using the 9-pin D sub-miniature connector (P/N 38075) provided with the instrument. The connector must be plugged into the Signal/Input connector on the rear panel of the instrument. This feature must be bypassed for the instrument to conduct a test.

With the instrument set to the desired test type and your DUT correctly connected to the instrument, you are now ready to start testing.

If the continuity function is on and the resistance of the ground circuit is less than the Max Resistance Setting, the green TEST button will illuminate.

Press the green TEST button on the front panel. The test will be conducted on the DUT for a duration equal to the Ramp and Dwell settings.

WARNING : DO NOT TOUCH THE DEVICE UNDER TEST ONCE THE

TEST HAS BEEN STARTED.

6

TEST RESULTS

(PASS/FAIL Indication Screen)

PASS

If the DUT passes the test, you will hear a short audible beep and the display will indicate the test results.

FAIL

If a failure occurs, you will hear a long audible alarm and the red failure indicator will light up. To stop the alarm press the red Reset button.

For additional information about these and other key features of the Hypot ® III, please consult the full Operation and

Service Manual or call us toll-free

1-800-858-TEST (8378) or

+1-847-367-4077

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