Compliance West HT-25KVP dc User manual

Dielectric Withstand
Tester
Model
HT-25KVP dc
0 - 25,000 Volts DC Output
Instruction Manual

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Dear Customer:
Congratulations! Compliance West USA is proud to present you
with your Dielectric Withstand Tester. Your instrument features
a groundbreaking microcontroller circuit design and ergonomic
front panel, and represents the latest in high voltage laboratory
testing.
To fully appreciate all the features of your new meter, we
suggest that you take a few moments to review this manual.
Compliance West USA stands by your instrument with a full one-
year warranty. If the need arises, please don't hesitate to call on
us.
Thank you for your trust and confidence.
Rev 1.0, Agust, 2013.

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Table of Contents
Quick Start................................................................................................................................... 1
Initial Setup .................................................................................................................... 1
An Introduction to Dielectric Withstand Testing with the HT-25KVP dc ................................. 2
Leakage Test .................................................................................................................. 2
High Voltage Dielectric Withstand Test........................................................................ 2
High Voltage Discharge ................................................................................................. 3
Introduction and Specifications................................................................................................... 4
Specifications ................................................................................................................. 5
Operation..................................................................................................................................... 6
Setting up the HT-25KVP dc ......................................................................................... 6
AC Line Voltage Requirements and Fuse Replacement................................................ 6
Front and Rear Panel Features ....................................................................................... 6
Initial Checkout Procedure............................................................................................. 9
Setting up the HT-25KVP dc for Laboratory Testing.................................................... 10
Factory Settings................................................................................................. 10
Display of Leakage Limit and Duration Settings.............................................. 10
Leakage Current Level Adjust .......................................................................... 10
Ramp Time Adjust ............................................................................................ 10
Voltage Adjust .................................................................................................. 11
High Voltage Test Time Adjust ........................................................................ 11
Setting the Voltage Ramp Switch ..................................................................... 11
Setting the Test Timer Switch........................................................................... 12
Setting the Failure Shutdown Switch................................................................ 12
Operating Techniques .................................................................................................... 12
Testing Products................................................................................................ 12
Test Results ....................................................................................................... 13
Maintenance and Calibration ...................................................................................................... 16
Service Information........................................................................................................ 16
Cleaning ......................................................................................................................... 16
Calibration Procedure..................................................................................................... 16
Entering Calibration Mode................................................................................ 17
Calibration and Software Version Information................................................. 17
Voltage Meter Verification ............................................................................... 18
Voltage Meter Re-Calibration........................................................................... 18
Leakage Meter Verification .............................................................................. 19
Leakage Current Re-Calibration ....................................................................... 19
Technical Assistance................................................................................................................... 21

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Section 1
Quick Start
For a quick look at the abilities of the HT-25KVP dc, we are providing this quick start
page, designed to get you up and running quickly. We recommend that you read the entire
manual before using the HT-25KVP dc to conduct actual testing.
Initial Setup
1. Remove the HT-25KP dc from its shipping carton and set it up on a bench.
2. Plug it in to a correctly rated source of supply, using the supplied cordset.
3. Turn on the tester using the AC Power Switch.
4. Change the Test Timer Switch to DEFEAT position.
5. Turn the Voltage Adjust knob fully counterclockwise to set output voltage to minimum.
6. Push the RESET Button.
7. Push and hold the TEST Button. (The output voltage is present only while the TEST Button
is pressed when the Test Timer Switch is set to the DEFEAT position).
8. Set the desired voltage level using the Voltage Adjust knob.
9. Release the TEST button; output voltage will drop to zero.
10. Plug the red High Voltage lead into the output.
11. Plug the black lead into the Return jack.
12. Connect the Test Leads across the part to be tested.
13. Push and hold the TEST Button and observe the front panel meters and lights for test results.
14. Release the TEST button to finish the Test.

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Section 2
An Introduction to Dielectric Withstand Testing with the HT-25KVP dc
The dielectric withstand test is a test which is recognized by safety agencies worldwide
as a valid criterion of safe assembly of end-use equipment. The HT-25KVP dc is designed as a
research instrument to determine the dielectric properties of component assemblies of end-use
equipment. It applies a high-voltage potential between Output and Return test leads and
monitors Leakage Current, and watches for Dielectric Breakdown during the test. To aid in
testing, the HT-25KVP dc can be configured with or without voltage ramp time, with or without
a test duration timer, and can be set to deliver high voltage after an arc has been detected to
pinpoint an area of arcing.
The dielectric withstand test involves high voltage, and caution should be exercised
when using the HT-25KVP dc. The Return Receptacle on the front panel is connected to ground
potential, and setups should be designed with this in mind, to guard against the operator
contacting high voltage. Always make sure the return lead is firmly connected.
Leakage Test
The HT-25KVP dc leakage test uses a separate low-frequency circuit to detect excessive
current between the Output and Return receptacles on the front panel. 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 sample may indicate an assembly, and or a
component problem in the circuit.
The leakage current is also monitored by the HT-25KVPac to ensure that excessive
leakage does not keep the tester from developing full voltage required for the high voltage test.
The HT-25KVP dc will provide full voltage at any leakage current level up to 5mA. Set the
acceptable leakage current limit using the Shutdown Limit Potentiometer on the front panel.
If the green Full Voltage indicator lights and the test continues, the leakage current was
below the acceptable limit. If the red Excess Leakage indicator lights, the buzzer sounds,
and the test is terminated; the leakage current was above the acceptable limit.
High Voltage Dielectric Withstand Test
This test checks for insulation system breakdown’s by applying a high voltage between
the Output and Return receptacles on the front panel. The HT-25KVP dc uses a separate high-
frequency circuit to detect arc breakdowns.
Set the test duration with the Timer Control Potentiometer on the front panel. The test
time is counted from the time the Full Voltage indicator is lit to the completion of the test. The
Timer Control Switch must be set to ON, or the HT-25KVP dc will test only while the Test
Button is pressed. The minimum test time is one second regardless of the setting of the Timer
Control Switch.

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If the green Hipot Pass indicator lights, the test cycle has been successfully completed,
meaning there was no dielectric breakdown. If the red Hipot Fail indicator lights, a
breakdown arc has been detected.
High Voltage Discharge
The HT-25KVP dc has an internal circuit designed to remove the high voltage, after
completion of the dielectric withstand test. The HT-25KVP dc should remain connected to the
circuit until the front panel meter shows that the output voltage has dropped to a safe level.

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Section 3
Introduction and Specifications
This manual contains complete operating and specifications for the HT-25KVP dc
Dielectric Withstand Tester.
The instrument is a bench-type Dielectric Withstand Tester with AC Output, designed
for laboratory testing of components, and insulation systems.
The HT-25KVP dc features automatic two buttons operation, with numerous safety features
designed to protect the operator:
- The test return lead is directly connected to ground potential for operator safety.
- The test can be immediately terminated at any time by pressing the red RESET button.
- Before the test can commence, the unit must be armed by pressing the red RESET
button. The test will not begin until the blue TEST Button is pushed.
- If a failure is encountered, the high voltage is immediately shut down, a buzzer sounds
and the voltage discharge progress is shown by the front panel meter.
- Failure modes are shown by the front panel LED's.
Convenience and testing features include:
- Voltage ramp, test time, and leakage limit are settable.
- Voltage ramp, and test duration timer are defeatable for specialized testing.
- Testing may be terminated or continued when a dielectric breakdown is detected.
- Test results are determined quickly, without operator intervention.
- The HT-25KVP dc allows custom setups for voltage ramp, test time and leakage limit.
Your Tester has a warranty for a period of one year upon shipment of the instrument to the
original purchaser.

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Specifications
ELECTRICAL
Voltage Output 0 - 25,000 Vdc
Leakage Current Adjustable from1 to 5mA in 0.1mA steps
Max Leakage Current Output 5mA from 0 – 18,000V
1mA at 25,000V
Pass/Fail Criteria:
Leakage Current: Pass/Fail point user adjustable.
Dielectric Breakdown: Separate high frequency detection circuit for
breakdown spike detection
Test Time: User adjustable 1 to 60 sec. 1 sec steps, defeatable
Voltage Ramp-up Time: User adjustable 1-5 sec., defeatable
Voltage Meter Accuracy ±0.2KV full scale
Leakage Meter Accuracy ±0.1mA full scale
Duty cycle 100 %
Test adjustments Front Panel: Ramp Time
Test Time
Leakage Limit
Voltage Adjustment
Ramp ON/DEFEAT
Timer ON/DEFEAT
Hipot ON/DEFEAT
ENVIRONMENTAL
Operating Temperature 15-40°C
Relative Humidity Range 0-90% non-condensing
GENERAL
Input power requirements 120 volts, 50/60 Hz, 2A max
Weight 28 lbs.
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 can be automatically terminated on failure
Leakage Test Provided; 5 mA DC factory set pass/fail point, user
adjustable.
Table 3-1. HT-25KVP dc Specifications

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Section 4
Operation
This section describes how to set up and make measurements with the HT-25KVP dc
unit. We recommend that you read the entire section carefully so that you can use all of its
features.
Setting up the HT-25KVP dc
The HT-25KVP dc is shipped in a special protective container that should prevent
damage during shipping. The container will include the following:
•The HT-25KVP dc Dielectric Withstand Tester
•A black 18 AWG Test Return Lead (Alligator Clip/Banana Plug ends)
•A red 18 AWG High Voltage Test Lead (Alligator Clip/High Voltage Plug ends)
•A Power Cord.
•This Instruction Manual
18 AWG Line Power
Cord
GL Return Test Lead Red 18 AWG High
Voltage Test Lead
Table 4-1. Shipment Cables & Connectors
Use the original shipping container for subsequent shipping. If the original shipping
container is not available, be sure that adequate protection is provided to prevent damage during
shipment.
AC Line Voltage Requirements and Fuse Replacement
Connect the HT-25KVP dc only to the voltage source indicated on the rear panel.
There is a user-replaceable fuse located on the front panel. The fuse rating is printed on
the front panel. For continued protection against risk of fire, replace only with same type and
rating of fuse. The AC Power switch should be turned off while the fuse is being replaced.
Front and Rear Panel Features
Before using the HT-25KVP dc tester, take a few minutes to become familiar with the
use of its controls, indicators, and connectors. The front panel features of the HT-25KVP dc are
shown in Figure 4-1 and described in Table 4-2.

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Figure 4-1. Front Panel Controls, Indicators and Connectors

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ITEM
NO.
NAME FUNCTION
1 HIPOT
When ON, Dielectric breakdown detect will be activated.
When in DEFEAT position, test will continue regardless of a dielectric breakdown, but it can be stopped by the excess
leakage limit. NOTE: The RAMP switch, and TIMER switch must also be in the DEFEAT position, otherwise the buzzer
will sound. The test will continue only as long as the TEST button is pressed. Minimum test time is approximately one
second.
2 TIMER
When ON, test duration is set by TIMER ADJUST, Item 5.
When in DEFEAT position, testing continues only as long at TEST button is pressed. Minimum test time is one second.
NOTE: TIMER Switch position must be DEFEAT when HIPOT Switch is in the DEFEAT position.
3 RAMP
When ON, Voltage ramp up time is controlled by RAMP ADJUST potentiometer, Item 6.
When in DEFEAT position, high voltage is applied immediately when TEST button is pressed. NOTE: RAMP switch
position must be DEFEAT when HIPOT switch is in the DEFEAT position.
4 LEAKAGE ADJUST Adjusts the shutdown point for the Leakage Current Test. For details see “Leakage Current Adjust.”
5 TIMER ADJUST Adjusts the test duration. For details see “Test Time Adjust”.
6 RAMP ADJUST Adjusts the delay between time TEST button is pushed and time desired output voltage is attained. For details see
“Ramp Time Adjust”. For no delay, DEFEAT Ramp Time Switch, Item 3.
7 RESET Button When lit, indicates that the HT-20KVPac is unarmed. When the RESET button is pressed, the TEST switch is lit.
PRESSING THE RESET BUTTON AT ANY TIME IMMEDIATELY STOPS TESTING.
8 TEST Button When lit, indicates the HT-20KVPac is ready to test; press to begin testing.
9 VOLTAGE METER Connected to the output. Reads actual output voltage. Adjust meter range with VOLTAGE ADJUST Knob, Item 17.
10 HIPOT PASS LED Indicates test conclusion with satisfactory results.
11 FULL VOLTAGE LED Lights when output voltage has ramped up. Test time starts when this indicator lights.
12 HIPOT FAIL LED Lights when arcing or insulation flashover has occurred.
13 EXCESS LEAKAGE LED Actual leakage current has exceeded the shutdown point set with Shutdown Limit Potentiometer, Item 4.
14 CURRENT METER Connected to the output. Read the current flowing through the return lead of the HT-20KVPac during the test.
15 AC OUTPUT Receptacle Connect high voltage lead here to conduct an AC test.
16 RETURN Receptacle At chassis ground reference level. Connect black return lead here.
17 VOLTAGE ADJUST Knob Voltage is continuously adjustable during testing with this knob.
18 AC POWER Switch Energizes the HT-20KVPac.
19 FUSE Mains fuse. Replace only with type, and rating of fuse specified on the front panel label. Turn off power switch, Item
18, before servicing fuse.
Table 4-2. Front Panel Control, Indicators and Connectors

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Initial Checkout Procedure
Use this procedure to verify that the HT-25KVP dc tester is working correctly. Refer to
table 4-1, figure 4-1 and table 4-2 for location of items.
CAUTION
High voltage, risk of shock, use with care.
1. Turn the Tester on using the AC Power switch.
2. Set the Voltage Ramp switch, Test Timer switch, and Failure Shutdown switch to ON
position.
3. Disconnect leads from the Output and Return jacks.
4. Set the Test Time to 30 seconds.
5. Push the RESET button. The TEST button should light.
6. Push the TEST button.
7. The HT-25KVPdc tester will conduct a test. The meter will read a voltage, hold, and return
to zero. During the test, the voltage can be adjusted using the Voltage Adjustment knob. At
the end of the test, the Full Voltage, Hipot Pass, and RESET switch indicators should be lit.
8. Connect the red lead to the Output receptacle, and the black lead to the Return receptacle.
9. Connect the two leads together to simulate a high leakage current condition. Push the RESET
button and then push the TEST button.
10. Test should terminate immediately and the buzzer should sound. The Excess Leakage
Indicator and RESET button indicators should be lit. If a spark occurred, the Hipot Fail
indicator will also be lit.
11. Leaving the red and black leads connected together, disconnect the red lead from the HT-
25KVP dc.
12. Enable the voltage output by pressing the RESET button, then the TEST button. When the
full voltage indicator lights, adjust the Voltage knob so the output is approx. 2500 volts.
Press the RESET button to disable high voltage output.
13. Verify that the red and black leads are connected together, the black lead is connected to the
Return receptacle, and the red lead is disconnected from the HT-25KVPdc.
14. (This test simulates a dielectric breakdown. High voltage could exist on the alligator clips.
Exercise caution to avoid shock.) Push the RESET button, then the TEST button. After the
full voltage indicator lights, pick up the red lead and insert it into the HV Output. The test
will immediately terminate with a buzzer. The Full Voltage, Hipot Fail, and RESET button
indicators should be lit.
15. Adjust the voltage and time to the desired settings
If any of these tests give unexpected results, service may be required. Please check the
test setup and if further information is needed, contact our Service hotline for assistance.

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Setting up the HT-25KVP dc for Laboratory Testing
This section describes procedures for setting the HT-25KVPdc tester.
a. Leakage current level
b. High voltage ramp time
c. High voltage level
d. High voltage test time
e. Voltage ramp switch
f. Test timer switch
g. Breakdown detect switch.
This will allow you to change settings from the factory settings below. Refer to table 4-1,
figure 4-1 and table 4-2 for location of items.
Factory Settings
The HT-25KVP dc is configured as shown when shipped from Compliance West USA:
Voltage Type: DC
Voltage Display: Vrms
Leakage Current Level: 1mA
High Voltage Ramp Time: Minimum
High Voltage Level: Minimum
High Voltage Test Time: 1 second
Voltage Ramp switch: ON
Test Timer switch: ON
Breakdown Detect switch: ON
Display of Leakage Limit and Duration Settings
To view the Test Duration, and Leakage Limit current settings, hold down the RESET button for 2
seconds. The meter will display “L” with the Leakage Limit value in mA. Hold down the RESET button
again for 2 seconds, and the meter will display “d” with the Test Duration set time in seconds.
Leakage Current Level Adjust
1. Connect the HT-25KVP dc to a correctly rated source of supply and turn ON the tester.
2. Push the RESET button. The TEST indicator should light, indicating that the HT-25KVP
dc is ready.
3. Turn the Leakage Limit Adjust. As soon as the potentiometer starts turning, the voltage
meter will start blinking and displaying “L” with the new value. Leakage Level can be set in
0.1 mA increments.
Ramp Time Adjust
This procedure sets the high voltage ramp time between 0.5 and 5 sec. The factory
setting of one second is adequate for most situations.

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1. Make sure there are no test leads connected to the Tester.
2. Set the Voltage Ramp Switch to ON.
3. Set the Test Timer Switch to ON.
4. Set the Failure Shutdown Switch to ON.
5. Push the RESET button, then the TEST button.
6. The FULL VOLTAGE indicator will light. The time from when the TEST button is pushed
to when the FULL VOLTAGE indicator lights is the Ramp Time. Set the Ramp Time
Potentiometer to change the ramp time. Repeat until the desired Ramp Time is set.
Voltage Adjust
This procedure controls the high voltage level used in the dielectric withstand test. The
HT-25KVPdc is factory set for minimum voltage as shipped from the factory. Use the procedure
below to set it.
1. Make sure there are no leads connected to the tester.
2. Set the Voltage Ramp Switch to ON.
3. Set the Test Timer Switch to DEFEAT.
4. Set the Failure Shutdown Switch to ON.
5. Turn the Voltage Adjust knob to minimum (counterclock wise)
6. Push the RESET button.
7. Push and hold the TEST button. Voltage will be supplied while the TEST button is pressed.
8. After the FULL VOLTAGE indicator lights, use the Voltage Adjust knob to set the desired
output.
9. Release the TEST button to terminate the test.
High Voltage Test Time Adjust
This procedure sets the length of time the HT-25KVP dc will conduct the high voltage test.
The test time is specified by the safety agencies, and is tied to the test voltage. Most safety
agencies will allow a much shorter test (usually 1 second vs. 1 minute) if the voltage is increased
by 20%. The factory set is for 1 second. Consult the safety agencies on the test time for the type
of equipment being tested. If a different test time is required, use this procedure to set it.
1. Connect the tester to a correctly rated source of supply and turn ON the power switch.
2. Push the RESET button. The TEST indicator should light, indicating that the HT-25KVPdc
is ready.
3. Adjust the Test Time potentiometer. As soon as the potentiometer starts turning, the voltage
meter will display “d” with the new value. Test Time can be set in 1 second increments from
1 to 60 seconds.
Setting the Voltage Ramp Switch
When this switch is in the DEFEAT position, the voltage will immediately rise to the
level set by the Voltage Adjust knob. The Ramp Control setting is ignored.

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When this switch is in the ON position, the voltage ramps according to the setting of the
Ramp Potentiometer. See adjustment instructions above. The Voltage Ramp Switch must be
defeated if Shutdown Limit Defeat is desired. See Table 4-3 for details.
Setting the Test Timer Switch
The Timer Control switch allows test time to be controlled by the HT-25KVP dc internal
timer or to continue until terminated by the operator.
When this switch is in the DEFEAT position, the test will continue only while the TEST
button is held down. The minimum test time is approx. 1 second.
When this switch is in the ON position, the test time will be controlled by the HT-
25KVP dc internal timer. For information on how to set this time, see instructions above.
The Test Timer must be defeated if Breakdown Detect Defeat is desired. See Table 4-3
for details.
Setting the Failure Shutdown Switch
Use extreme caution when using this feature
The Breakdown Detect switch allows the operator to continue testing after a failure is
encountered. This allows the operator to find the breakdown point, but all arc shutdown
circuitry in the HT-25KVP dc is disabled when the Breakdown Detect switch is in the
DEFEAT position. The excess leakage limit may stop the test. Also the tests may be terminated
at any time by releasing the TEST button.
WARNING: Testing with the Shutdown Limit switch in the DEFEAT position is
extremely hazardous. The HT-25KVP dc can generate lethal levels of voltage and current.
Therefore, care should be taken in examining the equipment being tested, to locate areas of
failure while the HT-25KVP dc is operating.
Operating Techniques
The following paragraphs describe how to operate the HT-25KVP dc Dielectric
Withstand Tester.
CAUTION:
High voltage is generated by the HT-25KVP dc. Although the chassis of the
equipment under test is grounded by the HT-25KVP dc, a risk of shock exists.
Testing Products
This section describes how to conduct a test. Testing can be terminated at any time by
pressing the RESET button.

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1. Set up tester to correct parameters for unit to be tested using the previously described
procedures.
2. Connect the HT-25KVP dc to a correctly rated source of supply and turn it on.
3. Plug the black lead into the Return receptacle. Plug the red lead into the Output receptacle.
4. Connect the alligator clips of the leads across the circuit or part being tested. Keep in mind
that the black lead is connected to earth ground.
5. Press the RESET button, the TEST button should light, indicating that the HT-25KVPdc is
ready to test.
6. Push the TEST button. The HT-25KVP dc will either:
• Ramp the voltage at the rate set by the Ramp Time Procedure, if the Ramp Control
switch is set to ON.
• Immediately energize the high voltage output if the Ramp Control Switch is set to
DEFEAT.
7. If the Shutdown Limit switch is set to ON, and if the leakage current of the circuit under
test exceeds the alarm value, the Excess Leakage indicator will light and the test will
terminate.
If the Shutdown Limit switch is set to DEFEAT, and the requirements of Table 4-3 are
met, the HT-25KVP dc will continue to test. Voltage output may sag if the power required
by the circuit is beyond the capabilities of the HT-25KVP dc.
8. If the Timer Control switch is set to ON, the HT-25KVP dc will conduct the high voltage
test for the amount of time set in the Test Duration procedure.
If the Timer Control switch is set to DEFEAT, the high voltage test will continue only
while the TEST button is pressed.
9. If an insulation system breakdown is detected, and
• The Shutdown Limit switch is ON, the Hipot Fail indicator will light, the buzzer will
sound, the voltage will be removed.
• The Shutdown Limit switch is set to DEFEAT, and the requirements of Table 4-3 are
met, the Hipot Fail indicator will light, and the test will continue as long as the TEST
button is pressed.
10. If no breakdown is detected, the high voltage will be removed at the end of the test, the
Hipot Pass indicator will light, and the RESET button will light.
11. Do not disconnect the leads from the equipment being tested until test has ended, and the
voltage meter indicates zero volts.
Test Results
Hipot Pass: If the Hipot Pass light is lit, the equipment being tested passed all test parameters.
Red Indicator/Buzzer: Any red indicator/buzzer test result means the equipment being tested
failed a test phase. If unanticipated test failures continue, and you suspect that the equipment
under test is built correctly, check the following items:
1. Shutdown Limit Setting: May be set too low. This would cause normal input capacitor
charging to draw more that the preset leakage current limit, triggering a Leakage Current
Fail light, and terminating the test. Consider raising the acceptable leakage current level;
see Adjustment of the Leakage Current Shutdown point.
If the Shutdown Limit level is at its highest setting, and failures continue, a DC hipot tester
may be required

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2. Ramp Time: May be set too fast. A very fast ramp time may allow input capacitors to act
as short circuits, triggering a Leakage Current Fail light and terminating the test. Consider
to have a slower Ramp Time, by increasing the time; see Ramp Time Adjust.

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Result
RAMP TIMER HIPOT
ON ON ON Fully automatic operation. When Test button is pressed, the output voltage will ramp at a rate
determined by the position of the TEST TIME adjustment knob. Test will stop automatically on
all leakage or breakdown failures.
DEFEAT ON ON Voltage Ramp is defeated. Full voltage is produced at the output immediately. Test will stop
automatically on all leakage or breakdown failures. For safety, we recommend that you begin
testing with the front panel voltage knob set at minimum.
ON DEFEAT ON Test Timer is defeated. After full voltage is reached, the test will continue only as long as the Test
button is held in, minimum one second. Test will stop automatically on all leakage or breakdown
failures.
DEFEAT DEFEAT ON Full voltage is produced at the output immediately when the Test button is pressed. The test will
continue only as long as the Test button is held in, minimum one second. Test will stop
automatically on all leakage or breakdown failures. For safety, we recommend that you begin
testing with the front panel voltage knob set at minimum.
ON ON DEFEAT Buzzer will turn sound, It will not allow to test until all the switches are in defeat.
DEFEAT ON DEFEAT Buzzer will turn sound, It will not allow to test until all the switches are in defeat.
ON DEFEAT DEFEAT Buzzer will turn sound, It will not allow to test until all the switches are in defeat.
DEFEAT DEFEAT DEFEAT Full voltage is produced at the output immediately. Test will continue only as long as the TEST
button is held in, minimum one second. The HT-25KVP dc will NOT shut down on a dielectric
failure, but the front panel Hipot Fail light will flash to indicate a dielectric breakdown. The
Hipot Pass light will not light at the completion of a successful test. For safety, we recommend,
that you begin testing with the front panel voltage knob set at minimum. For safety reasons,
excessive leakage current, as set by the Leakage knob, will cause the HT-25KVP dc to shut
down.
Table 4-3: Front Panel Switch Truth Table