Compliance West HT-S Series User manual

HT-S Series
Dielectric Withstand Tester With Ground Continuity Check
Instruction Manual for Models
HT-2000S (0-2000VAC)
HT-2800S (0-2800VDC)
HT- 000S (0-2000VAC/0-2800VDC)
HT-4200S (0- 000VAC/0-4200VDC)

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3
Dear Customer:
Congratulations! Compliance West USA is proud to present you with your
Dielectric Withstand Tester. Your instrument features a groundbreaking
logic-controlled circuit design and ergonomic front panel, and represents
the latest in high voltage production line testing.
To fully appreciate all the features of your new meter, we suggest that you
take a few moments to review this manual. If the need arises, please don't
hesitate to call on us.
Thank you for your trust and confidence.
Rev. 2.0, May 2017

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Table of Contents
Section 1.......................................................................................................................................6
Introduction and Safety..................................................................................................6
An Introduction to Dielectric Withstand Testing with the HT-S.....................6
Safety Precautions ...........................................................................................6
Test Personnel .................................................................................................7
Testing Area ....................................................................................................7
Safety Techniques............................................................................................7
Safety Markings...............................................................................................8
Using the HT-S Dielectric Withstand Tester .................................................................9
Ground Continuity...........................................................................................9
Ground Continuity Failures...............................................................9
Defeating the Ground Continuity ......................................................9
Leakage Test....................................................................................................10
Sporadic Leakage Current Failures ...................................................10
Chronic Leakage Current Failures.....................................................10
High Voltage Dielectric Withstand Test..........................................................11
High Voltage Dielectric Withstand Test Failures..............................11
High Voltage Discharge ....................................................................11
Testing Equipment with non-Standard Plugs or Pigtail Operation..................11
Section 2.......................................................................................................................................12
Specifications and Controls ...........................................................................................12
Introduction .....................................................................................................12
Front Panel Features ........................................................................................14
Front Panel Features ........................................................................................17
Options ............................................................................................................19
Isolation Relay Interface (PN:00-RI) ................................................19
Interlock (PN:00-XI) .........................................................................19
Section 3.......................................................................................................................................20
Operating Instructions....................................................................................................20
Setting up your Tester......................................................................................20
AC Line Voltage Requirements.......................................................................20
Fuse Replacement............................................................................................21
Initial Checkout Procedure ..............................................................................21
High Voltage Performance Test ......................................................................21
Ground Continuity Performance Test..............................................................21
Excess Leakage Performance Test ..................................................................22
Hipot Breakdown Performance Test................................................................22
Setting up the HT-S for Production Line Testing ............................................23
Factory Settings ...............................................................................................23
Display Setting Limits for Leakage, Time and Ground Continuity.................24
Adjustment of the High Voltage Level............................................................24
Adjustment of the High Voltage Test Time.....................................................24
Adjustment of the Leakage Current Level.......................................................24
Adjustment of High Voltage Ramp Time........................................................25
Setting the Ground Check Switch....................................................................25
Adjustment of the Ground Continuity Limit ...................................................25
Adjustment of Ground Continuity Offset ........................................................26
Ground Continuity Resistance Measurement ..................................................27
Operation Techniques......................................................................................27
Testing .............................................................................................................27
Testing a Device with 3-Wire Power Supply Cord..........................................28
Testing a Device with 2-Wire Power Supply Cord..........................................29
Section 4.......................................................................................................................................30

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Technical Assistance......................................................................................................30
Contact Information.........................................................................................30
Section 5.......................................................................................................................................31
Maintenance and Calibration .........................................................................................31
Service Information .........................................................................................31
Cleaning...........................................................................................................31
Calibration Information ...................................................................................31

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Section 1
Introduction and Safety
An Introduction to Dielectric Withstand Testing with the HT-S
The continuity test/dielectric withstand test is a production line test which is recognized by safety
agencies worldwide as a valid criterion of safe assembly of end-use equipment. The test ensures that the
primary circuit power and ground conductors were properly wired and connected for safe operation. It also
applies a high-voltage potential between power and ground conductors to make sure that no unintentional
leakage or arcing paths exist between power and ground. The test consists of a ground continuity check, a
leakage current check and a high voltage check. It is non-destructive to the equipment under test, and can
be accomplished in a short time.
The purpose of dielectric testing: Dielectric testing is a simple, non-destructive method of
verifying the adequacy of electrical insulation to withstand the sort of transients that can occur during
transient (surge) events. In addition, the dielectric test can verify that the insulation in question has an
adequate amount of performance "headroom". This is necessary to ensure that the insulation does not fail
because of degradation of the insulation due to aging, moisture, wear due to vibration, etc.
The method of dielectric testing: A high voltage (typically 1000 Volts or higher) is applied
between two conductors that are "supposed" to be electrically insulated from each other. If the two
conductors (an insulated "live" wire, and a metal enclosure, for example) are completely isolated from each
other, then the application of a large voltage difference between the two conductors will not allow current
to flow between the conductors. The insulation will "withstand" the application of a large voltage potential
between the two conductors - hence the term "dielectric withstand test". In general, there are two results of
the test that are considered a failure of the insulation: (1) excessive current flow during the test due to low
insulation resistance of the insulating material which separates the two conductors, and (2) an abrupt
dielectric breakdown due to electrical arcing or discharge, either through the insulation material, over the
surface of the insulation material, or a discharge through air.
The determination of a suitable test voltage: If the test voltage is too low, the insulation material
in question will not be adequately stressed during the test. This could cause inadequate insulation to pass
the test, and be considered acceptable. On the other hand, if the test voltage is too high, then the test could
cause permanent damage to an insulation material that is otherwise adequate for the application. A general
"rule of thumb" that is used for the testing of mains wiring which operates at voltages of 120-240Vac is
1000V plus two times the operating voltage. Using this rule, 120V wiring would be tested using a voltage
of 1240Vac.
Duration of the test: Generally, the test voltage is applied for one minute, in order to adequately
stress the insulation. Many standards allow the test duration to be reduced to 1 second for production-line
testing in order to accommodate large-volume production testing. In this case, standards quite often require
that the test voltage be increased by 20% in order to ensure that the shorter test duration of one second will
adequately test the insulation in question.
Safety Precautions
The dielectric withstand test generates voltages of up to 2000 Volts AC (HT-2000S & HT-3000S),
up to 3000 Volts AC(HT-4200S), up to 2800 Volts DC (HT-2800S & HT-3000S) or up to 4200 Volts DC
AC (HT-4200S) at potentially lethal current levels. Currents of as little as 5 mA at 120V can cause death,
and the HT-S is capable of generating 20mA AC at up to 2000 Volts (10mA at up to 3000Volts for HT-
4200S), and 5mA DC at up to 2800 Volts (up to 4200 Volts for HT-4200S). The HT-S has been designed
to minimize exposure to high voltages. However, the potential for serious injury or death exists and
personnel should be aware when they conduct this test.
Any use of this equipment other than as specified in this manual may result in a safety hazard.

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Test Personnel
Personnel require special training to conduct the dielectric withstand test. They should understand
electrical fundamentals clearly, and be aware that high voltage is adept and creative at completing a path to
ground. Instructions should include a warning against any metal jewelry. Operators should not allow
others in the testing area, especially when tests are being conducted. Organization is to be stressed. The
operator should keep the area free of unused leads and equipment.
Testing Area
The area used for conducting the dielectric withstand test should be as remote as possible from
normal production line activities. Only personnel actually conducting the test should be allowed in the
area, and it should be taped or roped off to preclude casual entry by other employees. In addition, the area
should be marked "WARNING - HIGH VOLTAGE TESTING" or the equivalent to warn others of the
nature of the testing taking place.
The bench being used should be non-conductive, and any exposed metal parts should be tied
together and grounded. If a conductive surface must be used, it should be grounded.
Because of sparking during a dielectric test failure, it is not safe to conduct dielectric withstand
tests in combustible atmospheres.
It is imperative that a good ground be provided to the HT-S unit. Before connecting the HT-S,
ensure that a low-resistance ground is provided by the building wiring. If the HT-S is used on a high-
resistance grounding circuit, dangerous high voltages may be present to the operator. In addition, the
power to the Testing Area should be provided with an easily reached shutoff switch which can be actuated
by personnel outside the area if needed.
Safety Techniques
The high voltage circuit of the HT-S can be shut off at any time by pressing the RESET button.
The HT-S has been provided with a Reset button to provide an unarmed "Standby" setting when it is
energized, but idle. When the red RESET light is lit the tester will not provide high voltage until the
RESET button and the TEST button have been pressed in order. To prevent inadvertent operation, the
operator should be instructed not to press the RESET button until the test is finish.
The HT-S is equipped with a ground continuity check which will not allow high voltage to be
applied if the Test Return Lead is not properly connected. This is an important safety feature and should
not be defeated unless two wire products are being tested. In that event, it is imperative that the operator
make absolutely sure the Test Return Lead is properly connected to the equipment being tested. If the lead
is not properly connected, a dielectric withstand test failure may energize exposed dead metal of the
equipment being tested. Additionally, the HT-S may not recognize the failure. The test will continue for
its normal length of time, and the HT-S may show a "PASS", see connections for more details.

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The HT-S has been designed for one-touch operation with the right hand. If possible, it should be
set up to the left and in front of the equipment under test. The equipment under test should be connected to
the HT-S and then left alone by the operator. After the operator is clear of the Tester and the equipment
under test, he should press the RESET Button, then the TEST button, with his right hand. This will allow
the greatest separation between the operator and the test being conducted.
The HT-S is designed to bleed the high voltage away after the test has concluded. In order to
ensure that any voltage present in the equipment being tested has been completely bled away, the operator
should not unplug the equipment under test from the HT-S until the front panel meter reads zero volts.
Safety Markings
Direct Current
Alternating
Current
Earth (ground)
TERMINAL
On (Power)
Off (Po
wer)
Caution, possibility
of electric shock
Refer to instructions High Voltage

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Using the HT-S Dielectric Withstand Tester
The dielectric withstand test involves high voltage and caution should be exercised when using the
tester. The return lead of the tester is connected to ground potential and when properly connected to the
equipment being tested, it will guard against the operator contacting high voltage. Always make sure the
return lead is firmly connected to exposed dead metal before start testing. To make sure if the connections
between the dielectric withstand tester and the equipment under test is correct, see the Testing section for
more detail. In the sections below, the three tests are explained.
Ground Continuity
The ground continuity test ensures that the grounding pin of the power supply cord is properly
connected to the exposed dead metal of the chassis. If this connection is absent, the exposed dead metal of
your product could be at line potential indefinitely after an internal wiring fault, causing risk of shock to
anyone touching it.
If the green Ground OK LED light is on, the connection between the grounding pin and the
exposed dead metal of the equipment being tested has a resistance lower than adjusted on the rear panel.
Ground Continuity Failures
If the red Ground Open LED light is on, the buzzer sounds, and the test is terminated. The
connection between the grounding pin and the exposed dead metal of the chassis has a resistance higher
than the indicated in the ground setting. This indicates a problem with the connection of the HT-S to the
equipment being tested, or that the ground connection in the equipment being tested is defective. The
connection to the tester should be checked by removing the Test Return Lead clip from the equipment
under test and reconnecting it, taking care to make a good connection. The unit should then be retested. If
a failing result is repeated, the connection between the power supply cord ground pin and the chassis of the
equipment being tested should be checked and reworked until a passing result is obtained.
Defeating the Ground Continuity
The ground continuity can only be conducted on equipment using a three wire grounded power
supply cord. Some equipment, such as most portable lamps and all double insulated tools, have only a two
wire power supply cord, so the Ground Continuity test cannot be conducted.
Please note that defeating the Ground Continuity should not be done except when necessary to test
two-wire devices. The Ground Continuity feature provides an extra level of operator safety because high
voltage will not be applied if the Test Return Lead is not properly connected to the exposed dead metal of
the equipment being tested. If the Test Return Lead is not properly connected, a dielectric withstand failure
may energize exposed dead metal. Additionally, the HT-S may not recognize the failure. The test will
continue for its normal length of time, and the HT-S may show a "PASS".
To allow the HT-S to test equipment using a two wire power supply cord, the Ground Continuity
test can be defeated by turning the rear panel Ground Check switch to the Off position. To remind the
operator that the Ground Continuity test is not being conducted, both the green Ground OK and red
Ground Open LED's will be lit continuously during the test. When testing with the Ground Check switch
in the Off position, the operator must ensure that the Test Return Lead is properly connected to exposed
dead metal of the equipment being tested for safety and to ensure that the HT-S properly reports all failures.

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Leakage Test
The HT-S leakage test uses a low-frequency circuit to check for excessive leakage between
primary power components and ground. There is not a specific leakage current level pass/fail requirement
at this time for most equipment, however, higher than normal leakage current on a particular part may
indicate an assembly or component problem in the primary circuit.
The leakage current is also monitored by the HT-S to ensure that excessive leakage does not keep
the tester from developing full voltage required for the high voltage test. The HT-S will provide full
voltage at any leakage current level up to 20 mA AC (HT-2000S & HT-3000S), up to 10mA AC (HT-
4200S) or 5mA DC (HT-2800S, HT-3000S & HT-4200S). The leakage current trip level is adjustable on
the rear panel.
The leakage test is conducted by shorting the line and neutral conductors of the power supply cord
and applying high voltage between them and the exposed dead metal of the chassis of the equipment being
tested.
Excessive leakage current is not grounds for failure of the dielectric withstand test. Leakage
current is a normal result of capacitance in the primary circuit between neutral or line conductors and
ground. (In dielectric tests of some larger electric motors, leakage currents of as high as 95 mA are
considered acceptable by safety agencies.) However, leakage currents higher than normally anticipated for
a particular model should not be ignored. This indicates problems of low resistance up to a short circuit
between line/neutral and ground, and failures should be investigated. Failure modes are discussed below.
If the green Full Voltage LED light is on and the test continues, the leakage current is below the
limit set by the rear panel adjustment.
Sporadic Leakage Current Failures
If the red Excess Leakage LED light is on, the buzzer sounds, and the test is terminated, the
leakage current delivered to the equipment being tested was over the limit set by the rear panel adjustment.
If other equipment of the same type routinely passes this test, there may be a problem with the primary
circuit of the example being tested. The unit should be checked and reworked if necessary.
Chronic Leakage Current Failures
AC Dielectric Withstand testing, charges all primary circuit capacitors connected line to ground or
neutral to ground. The current flowing through these capacitors is defined as leakage current. If almost all
examples of a model of equipment are not passing the leakage current test, we recommend that the leakage
current limit be increased by resetting the leakage current level on the rear panel to a higher level.
If the leakage current adjustment of the HT-S is set to 20mA AC and almost all examples of the
model being tested are still failing, the primary circuit capacitance of the equipment may be too high to
allow the AC dielectric withstand test to be used. This is due to the AC voltage charging all capacitors
connected between primary voltage and ground. If the overall value of these capacitors cause a leakage
current of more than 20mA to flow at the desired test voltage, the HT-S cannot generate full voltage, and
cannot successfully conduct the dielectric withstand test.
However, a DC dielectric withstand test is acceptable for most categories of equipment and will
not charge the primary circuit capacitors. The DC test can be conducted by switching the front panel
switch to DC (only HT-3000S or HT-4200). If the problem was due to high leakage current on the
capacitors of the circuit, the test should now be successful.

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High Voltage Dielectric Withstand Test
This test checks for insulation system breakdowns between the primary and ground circuits. The
HT-S uses a separate high-frequency transformer circuit to detect arc breakdowns.
The dielectric withstand test is conducted by shorting the line and neutral conductors of the power
supply cord and applying high voltage between them and the exposed dead metal of the chassis of the
equipment being tested. The duration of the test is controlled by the test time control on the back panel.
The test time is counted from the time the Full Voltage LED is lit to the completion of the test.
If the green Hipot Pass LED light is on, the test cycle has been successfully completed. The
equipment under test is in accordance with the preset test parameters. The HT-S is ready to test the next
piece of equipment.
High Voltage Dielectric Withstand Test Failures
If the red Hipot Fail LED light is on, a problem has been found with the insulation between
primary and ground. The equipment under test should be examined, reworked and successfully tested
before being shipped.
High Voltage Discharge
The HT-S is designed to discharge the high voltage after completion of the dielectric withstand
test. The equipment being tested should remain connected to the HT-S until the voltage has discharged to a
safe level to protect the operator and also to ensure that there is no energy stored in the tested equipment.
Testing Equipment with non-Standard Plugs or Pigtail Operation
The front panel of the HT-S is provided with a NEMA Type 5-15R receptacle, suitable for testing
cord-equipped single-phase products designed for use on a 15 amp branch circuit in North America. For
other types of products, a different receptacle type or pigtail leads may be required. Various adapters and
pigtail leads are available from Compliance West USA, or you can make your own, just make sure for the
correct configuration see the description of the outputs in the connections section. If tests of this type are
contemplated, call us for information.

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Section 2
Specifications and Controls
Introduction
This manual contains complete operating, maintenance and calibration instructions for the models
HT-2000S, HT-2800S, HT-3000S and HT-4200S Dielectric Withstand Testers, please see Table 1 for
specifications.
The instrument is a bench-type Dielectric Withstand Tester with AC and/or DC Output, designed
for production line testing. The HT-S features automatic one button operation, with numerous safety
features designed to protect the operator:
The Return Lead is directly connected to ground potential for operator safety. Test can be
immediately terminated at any time by pressing the RESET button. Before the test can commence, the unit
must be armed by pressing the RESET Button. The test will not begin until the TEST button is pushed.
If a failure is encountered, the high voltage is immediately shut down, a buzzer sounds, and any
voltage stored in the equipment being tested is bled off by a resistor bank in the HT-S unit. The voltage
discharge progress is shown by the front panel meter. Failure modes are shown by the front panel LED's
for quick troubleshooting.
Convenience and testing features include:
a. Test results are determined quickly, without operator intervention.
b. Operator instructions are printed on the rear panel for quick reference.
c. The HT-S allows custom setups for Voltage Ramp time, Test time, Leakage limit and Ground
Continuity limit.
d. The Ground Continuity test can be defeated by a switch on the rear panel for testing of products
using a two wire power supply cord.
e. DC Voltage is discharged by a resistor bank within the HT-4200S, HT-3000S or HT-2800S upon
test completion. Discharge progress is shown on the front panel meter.
f. The HT-S meets all safety agency criteria for automatic production line Dielectric Withstand
Testers.
g. Your Tester is warranted for a period of one year upon shipment of the instrument to the original
purchaser.

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Table 1. HT-S Specifications
ELECTRICAL
Voltage Output
0 - 2000 Volts AC HT-2000S, HT-3000S
0 - 2800 Volts DC HT-2800S, HT-3000S
0 - 3000 Volts AC HT-4200S
0 - 4200 Volts DC HT-4200S
Pigtail and Receptacle adapters available for most
configurations. Contact Compliance West for more
information.
Leakage Current 1 - 10mA AC HT-4200S
1 - 20mA AC HT-2000S, HT-3000S
1
-
5mA
DC HT
-
2800
S
, HT
-
3000
S, HT
-
4200S
Pass/Fail Criteria:
Ground Continuity: Pass/Fail Point:
User adjustable: 0.08Ω-1.50Ω±0.02Ω.
User non
-
adjustable: 3
Ω± 5% *(Optional & defeatable)
Leakage Current:
Pass/Fail point user adjustable.
Dielectric Breakdown: Separate high frequency detection circuit for breakdown
spike detection
Test Time:
User adjustable 1
-
60 sec.
Voltage Ramp
-
up Time:
User adjustable 1
-
5 sec.
Discharge Time < 7 ms for AC
< 1.3 s
for DC
Meter accuracy
± 2% from 500V t
o maximum limit voltage
Duty cycle
100
%
Test adjustments Rear Panel: Ramp Time
Test Time
Leakage Limit
Voltage Adjust
Ground Continuity Defeat Switch
Ground Continuity Limit
Ground Continuity Offset
Tamper proof operation available by removing adjustment
shafts.
ENVIRONMENTAL
Operating Temperature
15
-
40
°
C
Relative Humidity Range
0
-
90% non
-
condensing
Altitude
0
-
3
000 meters
Pollution Degree II (indoors, office/laboratory)
GENERAL
Input
Voltage, Current
120V
±
10%, Overvoltage Category 2
, 0.5A
Fuse rating
1
A 250V “
T
”
(Time Delay)
Weight
11 lbs aprox.
SAFETY AGENCY TOPICS
Transformer Output
< 500VA
Visual Indication of Voltage Output Provided by front panel meter, directly connected to high
voltage output
Failure Indication Audible, provided by internal buzzer
Visual, provided by red LEDs on front panel
Test automatically terminated on failure
Ground Continuity Test Provided; 1.5Ωfactory set Pass/fail point. May be
defeated for testing of products with two wire power
supply co
rds.
Leakage Test Provided; 5mA AC/2mA DC factory set pass/fail point,
user adjustable.
Operation Instructions
Provided on rear panel.
*Ground Continuity Pass/Fail Level can be adjusted from .5 to 5Ωduring the calibration procedure.

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Front Panel Features
Before using the HT-S tester, take a few minutes to become familiar with the use of its controls, indicators, and connectors. The front panel features of
the HT-S are shown in Figure 1 and Figure 2 then described in Table 2.
Figure 1. Front Panel Controls, Indicators and Connectors for HT-3000S, HT-2800S and HT-2000S.

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Figure 2. Front Panel Controls, Indicators and Connectors for HT-4200S.

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Table 2. Front Panel Controls, Indicators and Connectors.
ITEM
NAME
FUNCTION
1 RESET Button / Red Indicator When lit, indicates that the HT-S tester is unarmed. This button must be pushed before the TEST button is functional.
When the RESET button is pressed, the red RESET indicator goes out and the yellow TEST indicator is lit. PRESSING
THE
RESET
BUTTON AT ANY TIME STOPS THE TEST.
2 TEST Button / Yellow Indicator When lit, indicates that the HT-S tester is ready to test the connected equipment. The yellow TEST indicator goes out when
the
TEST
button is pressed.
3 Voltage Meter Provides visual indication to the operator of the actual output voltage of the HT-S tester. Used to set the test voltage level
during the setup procedure.
4 Ramp Bar Graph LED’s Individual LED’s light in sequence from left to right as the test voltage ramps from zero to full voltage. LED’s turn off
(ramp back down) at end of test.
5 Hipot Pass LED At the end of the preset high voltage duration time, if no failures are encountered, the green light will light and the test will
terminate.
6
Full Voltage LED
If full voltage is successfully reached, the
Full Voltage
LED will light and the high voltage duration timer sta
rts.
7 Ground OK / Ground Open LED's Indicates result of Ground Continuity test between grounding pin of the line cord and exposed metal parts of the equipment
under test. If the ground path resistance it is higher than the indicated on the ground setting, or if the leads are not properly
connected, the red Ground Open LED will light, the internal buzzer will sound, and the test will be terminated. If the
ground circuit resistance is acceptable, the green continuity LED will light and the test will continue. If the Ground Check
switch is defeated by the operator, both LED's will be lit for the duration of the test.
8 Excess Leakage LED Indicates failure of leakage current test. If leakage current between the primary circuit and ground is higher than the preset
value, the red LED will light, the internal buzzer will sound, and the test will be terminated.
9 Hipot Fail LED Indicates failure of high voltage test. If arcing or a flashover of the insulation system between primary parts and ground is
enco
untered, the red breakdown LED will light, the internal buzzer will sound, and the test will be terminated.
10
Return Lead Receptacle
Grounded banana plug receptacle. The 18 AWG Test Return Lead provided is connected here.
11
High Voltage Device Recep
tacle
NEMA 5
-
15R orange receptacle. For connection of the equipment under test. See items 11a and 11b for slots description.
11a High Voltage Output On the NEMA plug, the two top vertical slots are tie together, the high voltage to perform the Dielectric Withstand test
comes true these two slots.
11b Ground Continuity Measurement
Point
On the NEMA plug, the bottom round slot is the ground continuity measured point. Ground continuity test circuit is
measured from this slot (Item 11b) to the Return Lead R
eceptacle (Item 10).
12 High Voltage Test Jack Red High Voltage jack. For connection of high voltage test lead for testing insulating materials, etc. This High Voltage
Jack is standard on models HT4200S and HT
-
3000S, and optional on models HT
-
2800S and
HT
-
2000S
13 AC/DC Switch Selects AC or DC output. Changing switch setting does not change output until the next time the Reset button is pushed.
This option is only available on
HT
-
3000S
& HT
-
4200S
model.

17
Front Panel Features
Before using the HT-S tester, take a few minutes to become familiar with the use of its controls, indicators, and connectors. The rear panel features of
the HT-S are shown in Figure 3 and described in Table 3.
Figure 3. Rear Panel Controls, Indicators and Connectors

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Table 3. Panel Controls, Indicators and Connectors.
ITEM NO. NAME FUNCTION
1 Appliance Inlet / Fuse holder /
Power Switch
Use supplied cord set to connect tester to appropriate source of supply. Replace line fuse. Turn Tester ON/OFF.
Power switch must be accessible during operation
2 Fuse replacement warning / Rating
of supply
Specifies replacement fuse and required supply voltage.
3
Testlink OUTPUT
Rece
ptacle
The Output Testlink Cableset lead is connected here. The cableset is included when you get Testlink option.
4
Testlink RETURN
Receptacle
The Return Testlink Cableset lead is connected here. The cableset is included when you get Testlink option.
5
Testlink
Allows connection with GF
-
30
AC
-
T for Ground Bond Test.
A cableset is included when you get this option.
6
Interlock
This is a safety feature, when in short
-
circuited the HT works regular, when open stops immediately its function.
7
Relay Interfa
ce
Relay Interface/PLC Interface. Test signals through relay contacts/coils
(Optional)
.
8 Ground Check Switch Enables or disables the Ground Continuity test.
Turn ON for use with three-wire (grounded) power supply cords.
Turn OFF for use with two-wire power supply cords.
(When ON, conducts Ground Continuity test between the chassis and the grounding pin of the line cord of the
equipment being tested. When OFF, Ground Continuity test is bypassed for testing of double-insulated equipment
and other types of
equipment without a grounding pin in the line cord.)
9 Ground Resistance Setting
Adjustment
Used to adjust the Ground Continuity pass/fail point setting. See “Ground Continuity” on the Adjustment section for
more information
10 Ground Offset Button This button can perform two different functions. Pressing and holding it for 1 second, the HT-S will measure and
display on the front display the Ground Continuity resistance of the EUT under test. Pressing and holding the button
for 5 seconds will compensate the resistance of the test cables of fixture, see “Ground Continuity Offset Adjustment”
and “Ground Continuity Resistance Measurement” sections for more details.
11 Leakage Limit Adjustment Used to adjust the trip level for the excessive leakage current test. See "Leakage Current Level" on Adjustment
section for more information.
12 Test Time Adjustment Used to adjust high voltage test duration. See "Adjustment of the High Voltage Test Duration" section for this
procedure.
13 Ramp Time Adjustment Used to adjust the amount of time used to increase the high voltage from zero volts to the required level. See "High
Voltage Ramp Time" on Adjustment section for correct procedure.
14 Directions Provides directions for tester operation to test personnel.
15
Voltage Adjust
Used to adjust the High Voltage output. See "High Voltage Level" on the Adjustment section for correct procedure.
16
Calibration resistor
This resistor
(optional) may be used
to verify the leakage current.

19
Options
Isolation Relay Interface (PN:00-RI)
The Isolation Relay Interface option is a Female DB-15 connector located on the rear panel of the
tester. The Isolation Relay Interface option allows the user to manipulate the machine thru the DB-15
connector using a PLC or any other control system that can supply 5V, 12, or 24V depending on the user
specification when purchasing the tester.
The Pin configuration for the Relay Interface is describe in Table 4.
Signal
Pin Number
Type
Start 1 Input
Reset 2 Input
COM1 3 Common
Ground OK 5 Output
Ground Fail 6 Output
Full Voltage 7 Output
Excess Leakage 8 Output
Hipot Pass 9 Output
Hipot Fail 10 Output
Any Failure 11 Output
COM2 12 Common
Table 4. Relay Interface Pin Configuration
Interlock (PN:00-XI)
The Safety Interlock options is a 2 pin terminal block located on the rear panel of the tester. The
Safety Interlock has 2 different states; OPEN and CLOSE (SHORT)
OPEN.
When the Safety Interlock is open the TEST and RESET buttons will be disable and the tester will
not be able to run a test.
CLOSE (SHORT)
When the Safety Interlock is short the Tester is able to operate and run a test. If the state of the
interlock change to open the tester will not be able to run a test again until the state changes back to close.
Figure 4. Relay Interface and Interlock connectors

20
Section 3
Operating Instructions
Setting up your Tester
The HT-S tester is shipped in a special protective container that should prevent damage to the
instrument during shipping. Check the shipping order against the contents of the container and report any
damage or incomplete shipment to Compliance West USA. The container should include the following,
pictures are showed in Table :
- HT-S Dielectric Withstand Tester
- 18 AWG Line Power Cord. Use only a power cord suitable in the jurisdiction where the
equipment is operated, and only if its ratings meet or exceed the ratings of the equipment.
- 18 AWG GL Test Lead (Alligator Clip/Banana Plug ends, black)
- Ground Continuity Connector Tip or another 18 AWG GL Test Lead.
- Instruction Manual
Only HT-4200S
- Red 18 AWG High Voltage Test Lead (Alligator Clip/High Voltage jack)
Table 5. Shipment Cables & Connectors
Only accessories which meet the manufacturer’s specifications shall be used.
Connect this equipment to grounded outlet only. The integrity of the test system grounding is
dependent on building ground.
If reshipment of the instrument is necessary, please use the original shipping container. If the
original shipping container is not available, be sure that adequate protection is provided to prevent damage
during shipment. We recommend that the instrument be surrounded by at least three inches of shock-
absorbing material on all sides of the container.
Remove the tester from its container and place it on a test bench.
AC Line Voltage Requirements
AC line voltage requirements for your tester are noted on the rear panel of the instrument. Do not
connect the instrument to a different voltage source, use the power cord and make sure you have a ground
connection in your building before you start testing.
18 AWG Line Power
Cord
GL Return Test Lead
(QTY. 2 for HT-4200S)
Ground Continuity
Connector Tip (Not
included for HT
-
4200S
)
Red 18 AWG Hig
Voltage Test Lead
(Only HT
-
42
00S
)