WatchfulEye WTH-CS-1000V User manual
Portable Surge Protective Device Tester
Of all similar SPD testers, it is probably the lightest,
smallest tester with the most accurate test data
and the most durable battery
Working Principle of a Surge Protective Device
The core component of a surge protector is a nonlinear component inside. According to the different nonlinear
components, surge protectors can be classified as switch-type (the core component is mainly GDT) and voltage-limiting
type (the core component is mainly MOV).
Although the working principles of GDT and MOV are different, the basic characteristics are very similar: when there is no
over voltage, their impedance is very high, generally megohm level, which is almost equivalent to an open circuit. When
an over voltage occurs, the impedance quickly drops to a few ohms, and the surge current will flow into the ground
through the surge protector instead of entering the equipment. At the same time, as the impedance of the surge protector
at this time is small, the voltage on both sides is also relatively small, and it is connected in parallel with the protected
equipment, it also prevents the equipment from withstanding large surge voltages. In this way, it has the effect of draining
and limiting the pressure.
Importance of Leakage Current Parameters
With the extension of the service life of the voltage-limiting surge protector, the gradual aging of the MOV chip will be
accompanied by an increase in leakage current. The increase in leakage current will cause overheating, accelerated
aging, and failure of the surge protector.
If we do not pay attention to the aging curve of the surge protector and replace it in time, once the surge protector cannot
disconnect in time when getting overheating due to increasing in leakage current, it will more likely cause an explosion,
and more seriously, it may cause a fire.
Importance of Break-over Voltage Parameters
The break-over voltage of surge protector is the voltage value measured when the current flowing through the surge
protector is 1 mA when the test voltage increases.
Has the surge protector in the system been broken down?
Can the SPD which has been used for years continue to be used?
If the L-PE voltage of the power grid system is 277V, is the selected surge protector correct?
Normally only the value of UC is marked on the surge protector. What is the actual break-over voltage in response to the
surge current?
All of problems above will be solved when break-over voltage parameters are measured.
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Portable Surge Protective Device Tester
About Watchfuleye
WatchfulEye Solutions specializes in developing and manufacturing a complete range of surge protective devices(SPDs),
protecting your equipment and systems against surge caused by lightning inductive voltage or operational over voltages.
Watchful Eye surge protective devices are widely used in low voltage DC & AC power supply system, data and control
system in telecommunication and new energy industry such as solar and wind power system, etc.
UL certificate for power supply series:
UL File number
：
E345944
UL certificate for networking & signal series:
UL File number
：
E346881
CE Certificate:
Certificate number for power supply series
：
1048140519
Certificate for networking & signal series
：
1044270319
RoHS Certificate:
RoHS for power supply series
：
STT/15T1037-RoHS
RoHS for Networking and signal series
：
STT/15T1036-RoHS
Paperless Datasheet
Going green and protecting environment is manufacturers' responsibility. Each WatchfulEyE product has a link of
downloading data sheet on its enclosure:
http://datasheet.watchfuleyesolutions.com/US128002.html
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Portable Surge Protective Device Tester
Surge Protective Device Tester User Manual Menu
Importance of Leakage Current & Break-over Voltage Parameters 1
About Watchfuleye 2
Surge Protective Device Tester User Manual Menu 3
Model & Ordering Code, Main Features 4
Conformity of Test Result 4
Technical Specification, Dimensions 5
Introduction of the SPD Tester 6
Safety Instructions, Power Supply of the SPD Tester, Test Error 7
Testing Banana Plugs and Testing Pens 7
Testing Preparation and Testing Mode Selection 7
FUNCTION SELECTION 8
TESTING MODE AND PROCEDURE
Ⅰ
. Rapid Test of MOV-Type SPDs 9
Ⅱ
. Precise Test and Calibration Mode of Break-Over Voltage 10
Ⅲ
. Precise Test and Calibration of MOV Leakage Current 11
Ⅳ
. Leakage Current Test under the Mode of Fine-Turning "Ad" Voltage 12
Ⅴ
. GDT Test and Calibration 13
VI. Precise Testing and Calibration of Breakdown Voltage 13
VII. Help for Tester Measurement (measurement by third-party institutions) 14
Ⅵ
II. Calibration Steps of the Tester 15
FAQ & Help 16
Download WatchfulEyE Official App 19
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Portable Surge Protective Device Tester
.
Portable Surge Protective Device Tester
WTH-CS/BT-1000V portable handheld LCD display Break-over Voltage Leakage current tester for surge protective device
applies to the measurement of the parameters of the voltage-limiting type and switch-type SPDs. These data are used for
evaluating the operating characteristics of the SPDs and the product selection to cooperate with the construction site.
Model & Ordering Code
Model: WTH-CS/BT-1000V
Ordering Code: US128002
UPC/EAN Code: (0) 811914030058
Main Features of WTH-CS/BT-1000V SPD Tester:
1. Portable and convenient use with batteries, rechargeable
batteries or external power supply; suitable for office and onsite
measurements
2. Easy, rapid and precise measurement by pressing one button
for testing and immediate display SPD data features
3. While MOV testing, a buzzer will sound if the deviation of
break-over voltage exceeds the default value by ± 5%.
4. While MOV testing, a buzzer will sound if the leakage current
exceeds 20 μA.
5. Applied to testing both MOV-type and GDT- type SPDs
6. Precise break-over voltage test under the constant current
1mA
7. Precise leakage current test under 75% of the break-over
voltage
8. The voltage of the tester can be boosted up to 1000V DC
9.Convenient multimeter calibration methods
Conformity of Test Result
The breakover voltage of surge protective device refers to the value of the voltage which is tested when 1mA current flows
through the surge protective device while the testing voltage is boosted.
Since only the value of Uc is marked on the label of a surge protection product, the breakover voltages of the products
specified in corresponding with the Uc values by different manufacturers during actual production maybe vary. The
following are the parameters of "Watchful Eye" surge protective devices for reference.
Power Supply System Uc U1mA Surge Protector Testing
110V
、
120/208V 150V 257-298V WTH-40/C/R/1P-150
220/380V 275V 447-518V WTH-40/C/R/1P-275
220/380V
、
277/480V 385V 590-683V WTH-40/C/R/1P-385
347/600V 550V 780-903V WTH-40/C/R/1P-550
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Portable Surge Protective Device Tester
Convenient Testing Operation
Ⅰ. Rapid testing methods for voltage-limiting type(MOV-type) SPDs:
Choose FUNCTION 1, press TEST button, Break-over Voltage and Leakage Current will display on the screen.
Ⅱ. Rapid Testing methods for switch-type(GDT-type) SPDs:
Choose FUNCTION 6, press the testing button, “Breakdown Voltage” will display on the screen.
Technical Specification of WTH-CS/BT-1000V:
Range of break-over voltage for testing Un(U1mA): 120~200 +/-5V, 200~1000V +/-2.5%
Range of leakage current for testing: 0~20.0uA +/-0.5uA, 20.0~25.0uA +/-2.5%
FUNCTION 1 testing mode: for testing voltage-limiting type SPDs, break-over voltage and leakage current will display in
about 2.5 seconds.
Range of breakdown voltage for testing: 0~1000V, ±2.5%, ±5V(120-1000V)
FUNCTION 6 testing mode: for testing switch-type SPDs, boost the DC voltage step by step at a rate of 100V/second for
an accurate measurement of breakdown voltage.
Minimum resolution of the break-over Voltage: 1V
Minimum resolution of the leakage current: 0.1μA
Operation temperature: 32°F ~ +122°F (0°C ~ +50°C)
Power supplies: four AA1.2V rechargeable batteries, four AA1.5V batteries or DC 5V 2A power supply adapter
Weight: 570g/1.26 lb (Without accessories)
Dimensions: 245mm×120mm×50mm(9.65in×4.72in ×1.97in)
Accessories Dimensions
1. banana head test cable; 2. pin test pen; 3. crocodile clip
4. USB to DC 5.5mm*2.1mm
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Portable Surge Protective Device Tester
Safety Instructions
1. USE EXTREME CAUTION In the testing process, the voltage boosts up to above 1000V, and the maximum
current is 1mA. DO NOT touch the exposed part of the test banana plug or the test pens.
2. DO NOT press the TEST button when the tester isn’t connected to a tested sample. Doing so can damage the
tester.
3. ALWAYS turn off the power supply promptly during the long standby mode prompting.
4. ALWAYS do the testing strictly according to the operation instructions. Non-qualified persons are not allowed
to do the calibration or open the tester without professional guidance.
Power Supply of the SPD Tester
There are two power supply modes:
1. Connect to DC 5V 2A power supply adapter, plug in the power supply, the initial value "0" will display on the screen, that
is the standby mode.
2. Install 4 AA batteries or rechargeable batteries, press the red button on the right side to turn on the battery power
supply switch, the voltage of the batteries will display on the screen first, and then display the initial value "0", that is the
standby mode.
Note:
1. If the voltage is lower than 4.5V, the upper left corner of the screen will display "Lobat".
2. If the standby time exceeds 300 seconds(every 300 seconds interval), the tester will emit a continuous sound of
"Beep.Beep" to remind you of shutting down to save energy, avoiding running out of batteries due to long-time standby.
Test Error
If the test error is in the unacceptable range, calibrate to the common voltage segments and critical leakage current, e.g., if
a calibration for the 500V voltage segment is applied in a 300V voltage segment test, it will result in errors.
Test Banana Plugs and Test Pens
1. There are two test banana plug jacks on the top of the tester, insert the red and black test banana plugs into the
corresponding colored jacks.
2. The test pens include a clip type and a probe type. The other ends of the two test banana plugs can be put on test clips
or test probes according to the test requirements (e.g., use the clip-type test pens for testing SPD modules without bases).
3. Take out the SPD module to be tested
4. Clamp the two poles of the voltage-limiting(MOV-type) SPD with the test clips.
Test Preparation and Selection of Testing Modes
Set the mode button according to the tested SPD sample type.
Note:
if a default value of break-over voltage is set, test an SPD with FUNCTION 1 testing method, a long BUZZER will sound If
the deviation of the tested value exceeds the default value by ± 5%.
Take WTH-40/C/R/1P-385 as the tested sample of voltage-limiting(MOV-type) SPD
Take WTH-65/G/1P-255 as the tested sample of switch-type(GDT-type) SPD
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Portable Surge Protective Device Tester
FUNCTION SELECTION
FOR VOLTAGE-LIMITING SPDS (MOV-TYPE)
1 Standard Test: the break-over voltage and the leakage current are displayed. A buzzer will sound if the deviation
exceeds the default value by ± 5%.
2 Precise test to verify the current outputs (1mA) and test the break-over voltage: the constant current(1mA) outputs and
the break-over voltage will be continuously displayed.
3 Precise test for the leakage current: the break-over voltage is displayed first, then the 75% value of the break-over
voltage and the leakage current will be alternately displayed.
4 Customized test the leakage current by positive deviation: the 75% value of the break-over voltage and leakage current
will be alternately displayed. Press the TEST button to boost the voltage in increments of +1Ad (1Ad=0.293V); then the
value of leakage current under the boosted voltage will be alternately displayed with the Ad value.
5 Customized test for leakage current by negative deviation: the 75% value of break-over voltage and leakage current
displays alternately. Press the TEST button to reduce the voltage in negative increments of -1Ad (1Ad=0.293V), then the
value of leakage current under the boosted voltage will be alternately displayed with the Ad value.
FOR SWITCH-TYPE SPDS (GDT-TYPE)
6 Standard Test: boost the voltage at a rate of 100V/sec, and the voltage boosting progress bar is displayed. Finally, the
breakdown voltage of the Switch-type SPD will be displayed.
7 Precise Test: boost the voltage at a rate of 100V/sec, and the voltage boosting progress bar is displayed; next, the
breakdown voltage of the Switch-type SPD will be displayed; hold the TEST button to boost the voltage rapidly again at a
rate of 100V/sec until it reaches the point that differs by 100Ad (1Ad=0.293V) from the value previously tested. Then lower
the voltage boosting speed to 2Ad/sec. The highest voltage value finally shown in the DISPLAY is the breakdown voltage
of the Switch-type SPD.
THE DEFAULT VALUE OF BREAK-OVER VOLTAGE FOR MOV-TYPE SPDS
8 Set the default value of the break-over voltage: when the default value of the break-over voltage blinks in the DISPLAY,
※
Press TEST button to increase the value; hold the TEST button to increase the value rapidly.
※
Press FUNCTION SELECT button to save the value. Then the tester will return to testing standby status with 1 in the
display.
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Portable Surge Protective Device Tester
Ⅰ. Rapid Test of MOV-Type SPDs
1. Function Selection Choose FUNCTION 1
2. Testing
Press TEST button, release the button when a BEEP sounds.
3. Read the testing data
The screen displays the break-over voltage and the leakage current under 75% of the break-over voltage of the tested
MOV-type SPD; the whole process takes about 2.5 seconds.
4. Continue to test
1) According to the features of the MOV, it is normal that data inconsistency may occur between the first test and the
second test, this characteristic of MOVs can be judged by the data from several more tests.
2) When the leakage current displays on the screen, press the TEST button; you’ll hear a "Beep". After the first test is
completed, the second test will start automatically.
3) Also, when the screen returns to the "0" standby mode, press the TEST button to start the second test.
4. Exit to the standby mode
When the leakage current displays on the screen, in 1 second without any key operation, the screen will be cleared to "0"
and will exit the test to return to standby mode.
Test with The Default Value of Break-over Voltage
1. Function Selection
Choose FUNCTION 8
2. Set the default value of the break-over voltage: when the default value of the break-over voltage blinks in the DISPLAY
※
Press TEST button to increase the value; hold the TEST button to increase the value rapidly.
※
Press FUNCTION SELECT button to save the value. Then the tester will return to testing standby status with 1 in the
display.
3. Standard test with a default value of break-over voltage
The break-over voltage and leakage current displays, a long BUZZER will sound If the deviation of the tested value
exceeds the default value by ± 5%.
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Portable Surge Protective Device Tester
Ⅱ. Precise Test and Calibration Mode of Break-Over Voltage
1. Function Selection
Choose FUNCTION 2
2. Test
Press TEST button, release the button when a BEEP sounds.
3. Read the test data
Test the precise value of the break-over voltage until the screen continually displays the tested break-over voltage of the
MOV-type SPD, read the test data.
6. Exit to the standby mode
In the state of displaying the break-over voltage, press the TEST button. When you hear a "Beep". Release the TEST
button and the screen will be cleared to "0". Then exit the test to return to the standby mode.
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4. Verify the current value of 1mA
1) Choose a multimeter "Fluke 87V" or any other multimeter with an accuracy
of 0.1μA. Connect the multimeter in series with the MOV type SPD and the test
pens, and verify the constant current output of 1mA.
2) The description of the MOV leakage current is given by the tested voltage
value when the constant current is 1mA. According to this characteristic, the
more accurate the 1mA constant current outputs, the more accurate the testing
data of the break-over voltage will show on the display.
5. The calibration of the break-over voltage
1) Choose a multimeter "Fluke 87V" or any other multimeter with the accuracy
of 0.1V.
2) Connect the multimeter probes in parallel with the SPD and the test pens.
3) In this mode, while maintaining the constant current of 1mA outputs, the
tester continually displays the break-over voltage value.
4) Open the tester and adjust the tester R3 (Potentiometer) to make the tester
display the same value as the multimeter. At this point, the calibration of the
break-over voltage is completed.
This manual suits for next models
2
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