Tsuruga 8525 User manual

TSURUGA ELECTRIC CORPORATION
I-01456-1
MODEL 8525
Withstanding Voltage & Insulation Resistance Tester
Instruction Manual

1
FOR SAFE USE
For safe use of this product, please observe the following warning and caution. In order to help the users’ safe
use of the products, the following symbol marks are used in this manual.
This is the warning to avoid the danger when it is assumed that such danger as may
cause fatal accident or severe injure to a user occurs in case that the product is
mishandled.
This is the caution to avoid the danger when it is assumed that such danger as may
cause minor injure to a user or generate only physical obstacle occurs in case that the
product is mishandled.
WARNING
This tester outputs high voltage. As there is danger of an electric shock, please strictly
follow the directions below:
●Do not touch high voltage cables or test samples during the test.
The places marked with on the tester are the dangerous parts where the
high voltage is generated.
●Make sure to connect the protective ground terminal to the earth.
●Do not short-circuit the output to the ground or commercial power supply line.
It is dangerous as the housing of tester is charged with high voltage. It also causes the
break-down of the tester.
●When operating the tester, put on the rubber gloves for an electric operation.
●For the connection to the sample to be tested, use the attached high voltage
cable or an electric cable appropriate to the operating voltage.
●Do not repeat ON/OFF of the power supply switch. It is dangerous and causes the
break-down of the tester.
●Place for installation
Never install or use this product in the place where such explosive or flammable materials
as mentioned below are used or stored (Occupational Safety and Health Laws,
Enforcement RegulationsAppendix Table 1 Dangerous Materials.
[Explosive material], [Flammable material], [Inflammable material], [Flammable gas],
[Oxidizing material]
※Model 8525 internally uses the metallic materials. There is a fear of deterioration due
to corrosion or rust and explosion or inflaming by an electric spark.
●Do not put anything on the 8525 or use it as foot stool.
※It affects the heat radiation, causing internal heat up and breakdown.
※It may also cause a deformation of the top part of the product.
●When the voltage is applied to the capacitance load (test sample), the output
voltage may rise higher than the case of no load depending upon the capacitance
value of the load. Also, in case of the voltage liable load (test sample), wave
distortion may occur.
In case of test voltage 2kV, the influence of capacitance 2000pF or less can be
ignored.
CAUTION
Pay attention to the following cautions about the power supply.
This tester is equipped with a high voltage transformer 500VA, so it can happen in the
following cases that the considerably big current (a few 10A) flows to the commercial power
supply line which this tester is connected to.
During a few 10ms immediately after the start of withstanding voltage test.
During a few 10ms while this tester makes a NG (no good) judgement for the test sample.
Take care for the capacity of supply power line and the other equipment or devices
connected to the same line.
Besides, in case that the stabilizedAC power supply is used, depending upon the action of its
current limiter circuit, the output is turned ON/OFF at high speed. It eventually generates
the considerably big surge voltage and is very dangerous.
WARNING
CAUTION

2
CAUTION
●To avoid break-down, malfunction or other troubles, do not use the tester in such
places where:
exposed to rain, water drops or direct sunlight.
high temperature or humidity, heavy dust or corrosive gas.
affected by external noise, radio waves or static electricity.
unstable or of much mechanical vibration
high sensitivity measuring instruments or receiver locates nearby
●Do not open the case or modify the tester as it may cause a danger of an electric
shock or other troubles.
●In case that abnormal operation occurs, turn off the power supply switch
immediately and pull out the power supply cable from the plug socket.
●When doing the maintenance or checking, be sure to stop the use of product and turn off
the power supply.
●Do not use the product in the place of vibration or where the shock may occur as it will
cause the breakdown of the product.
MAINTENANCE & TRANSPORTATION
WARNING
●Take care that the water drops like rain do not wet the product.
＊It may cause the electric shock or malfunction.
●Do not lay along the product. Also take care that the product does not fall down by
vibration or else.
＊It may cause the damage of internal mechanism or malfunction.
CAUTION
●When the product is transported, hold the chassis (bottom plate).
Do not carry the product holding its red bushing at high voltage output terminal section
(refer to ⑥and ⑲of the article 3 Name of parts and functions).
＊The bushing (red) may break, causing serious injury by the fallen 8525.
●Minimize the mechanical shock or vibration when transporting the product.
＊It may cause the damage of internal mechanism or malfunction.
INTERLOCK
Model 8525 is provided with interlock function.
During the interlock function is in operation, no test is allowed.
The interlock function can be canceled by connecting the attached REMOTE/OUT plug into the
REMOTE/OUT connector ⑱on the back and then pressing the STOP switch ②.
Please refer to the article 14.3 (P60) for the interlock function.

3
Contents
Page
1. Preface ........................................................................................................................... 5
1.1 Initial setting at the time of delivery ……………………………………………… 5
2. Confirmation prior to use .........................................................................................….. 6
2.1 Unpacking ......................................................................................................……. 6
2.2 Cautions for handling …...............................................................................……. 6
3. Name of parts and functions ................................................................................…..... 7
3.1 Front panel .....................................................................................................…….. 7
3.2 Rear panel ....................................................................................................…….... 10
4. Preparation prior to use ..................................................…………………………..... 12
4.1 Zero adjustment of output voltmeter …………………………………………… 12
4.2 Connection of protective ground terminal ……………………………………… 12
4.3 Connection with external control device ......……………………………………. 12
4.4 Connection of high voltage cable ...……………………………………………. 12
4.5 Connection of power supply cable ……………………………………………… 13
4.6 Throw in and shut off of power source ......…………………………………… 13
4.7 Before the test ………………………………………………………………….. 13
5. Setting items in each mode …………………………………………………………. 14
5.1 READY status …………………………………………………………………… 14
5.2 Setting mode of test conditions …………………………………………………… 14
5.3 Memory write-in mode …………………………………………………………… 14
5.4 Memory read-out mode …………………………………………………………… 14
6. Kind of test and flow of setting ……………………………………………………… 15
6.1 Kind of test ……………………………………………………………………… 15
6.2 Flow of setting …………………………………………………………………… 15
7. Setting of test item ………………………………………………………………………. 16
7.1 Status of display and expression in instruction manual ………………………… 16
7.2 Setting of each test item ……………. …………………………………………… 16
7.3 Key lock ………………………………………………………………………… 17
8. Setting of test condition for withstanding voltage test …………………………… 18
8.1 Test range of withstanding voltage test …………………………………………… 18
8.2 Referential voltage ……………………………………………………………… 19
8.3 High limit of leak current ……………………………………………………… 21
8.4 Low limit of leak current ………………………………………………………… 22
8.5 Test time .………………………………………………………………………… 24
9. Setting of test condition for insulation resistance test ……………………………… 27
9.1 Test range of insulation resistance test …………………………………………. 27
9.2 High limit of resistance value …………………………………………………… 28
9.3 Low limit of resistance value ……………………………………………………… 30
9.4 Time of mask timer ……………………………………………………………… 31
9.5 Test time ………………………………………………………………………… 32
9.6 Discharging function …………………………………………………………… 34

4
10. Memory function ……………………………………………………………………… 35
10.1 Configuration of memory ………………………………………………………… 35
10.2 Memory write-in ………………………………………………………………… 36
10.3 Memory read-out ………………………………………………………………… 37
11. Test procedure (from start to judgement result) …………………………………… 38
11.1 Setting of test voltage for withstanding voltage test (before starting test) ……… 38
11.2 W –I test (withstanding voltage test →insulation resistance test) ……………. 40
11.3 I –W test (insulation resistance test →withstanding voltage test) …….……… 44
11.4 W test (withstanding voltage single test) ………………………………………… 48
11.5 I test (insulation resistance single test) …………………………………………… 51
12. Special test mode ………………………………………………………………………… 54
13. Remote control ………………………………………………………………………… 55
13.1 Operation by REMOTE connector ……………………………………………… 55
13.2 Operation by REMOTE terminal block …………………………………………. 55
13.3 Operation by REMOTE/OUT connector ………………………………………. 56
13.4 Operation by REAR:MODE ………….………………………………………… 57
13.5 Priority of each remote control …………………………………………………… 58
14. External control ………………………………………………………………………. 59
14.1 Control by REMOTE/OUT connector …………………………………………. 59
14.2 Arrangement and function of connector pins …………………………………… 59
14.3 Interlock signal …………………………………………………………………… 60
14.4 Protective function (PROTECTION) …………………………………………….. 60
14.5 Output signals and power supply for control …………………………………….. 61
15. Status output …………………………………………………………………………… 62
15.1 Name of STATUS OUTPUT and condition for output …………………………… 62
15.2 Specifications of status output …………………………………………………… 62
15.3 Setting of condition for status output ……………………………………………… 63
16. Timing chart …………………………………………………………………………… 64
17. Adjustment of buzzer sound …………………………………………………………… 65
18. Monitor output of voltage ...…………………………………………………………… 66
19. Error messages ………………………………………………………………………… 67
20. Maintenance …………………………………………………………………………… 68
20.1 Cleaning ………………………………………………………………………… 68
20.2 Failure symptom ………………………………………………………………… 68
20.3 Replacement of fuse ……………………………………………………………… 68
21. Specifications ………………………………………………………………………… 69

5
1. Preface
For proper use of this tester, please carefully read these instructions before initial operation.
Please make sure that this instruction manual reaches the responsible person of operation
and also keep it near the tester so the operator can read it any time.
Model 8525 deals high voltage, so it is designed to provide many protective functions and
various concerns to secure the operators’ safety.
●As the withstanding voltage tester, this model has the capability of max. output 5kV and
output capacity 500VA, which allow for a withstanding voltage test of various electronic
equipment or components, in accordance with the various standard.
●Referential voltage setting, which prevents the test from being started unless the test
voltage comes into the range of either higher value of ±5% of set value or ±50V, high
and low leak current setting, timer function ensures highly accurate measurement.
●As the insulation resistance tester, this model is provided with two ranges of
500V/2000MΩand 1000V/2000MΩ.
●Large green LED of high visibility is employed for the display of test voltage, current
and test time.
●9 memory is provided to write in and read out the test conditions regulated by the
various standards or regulations.
●Relay contact can be output as the status output during the test.
●By means of remote/out connector, an output signal to show “waiting”, “in-test”or
“judgement”can be output in open collector, depending upon the status of the tester.
●This tester is also provided with the remote control connector and terminal blocks which
allows remote start/stop of the test. With use of this function jointly with judgement
result and output signals, it facilitates the automation and labour-saving.
1.1 ●Initial setting at the time of delivery
The tester has the following initial setting at the time of delivery from factory.
Function
Setting
Remarks
Key lock
OFF
For detail, please refer to the article 7.3 Key lock.
Double action
OFF
For detail, please refer to the article 12 Special test
mode.
GOOD hold
OFF
Momentary
OFF
FAIL mode
OFF
Memory (Common for No.1~No.9)
Test
mode
Withstanding voltage test
condition
Insulation resistance test
condition
W-I
Test voltage range 2.5kV
Test voltage range 0.5kV
Referential voltage 0.00kV (OFF)
High limit resistance value 2000MΩ
High limit leak current 10.0mA
Low limit resistance value 10MΩ
Low limit leak current 0.0mA (OFF)
Mask timer 0.3S
Test time 60.0s
Test time 60.0s
Discharge function ON

6
2. Confirmation prior to use
2.1 ●Unpacking
(1) Unpacking
When the tester is delivered, please check whether it has not been damaged in transit
and unpack it carefully. If any damage or inconvenience is found, please consult the
dealer whom you purchased the tester from for proper solution.
(2) Check of contents
Please do not leave in the carton any item of the contents listed below.
List of accessories:
High voltage cable 2m 1 pair
Earth wire 3m 1 piece
Power supply cord 2.5m 1 piece
REMOTE/OUT plug 1 piece (36P)
Fuse 7A 1 piece
Instruction manual 1 copy
RS-232C interface instruction manual 1 copy
RS-232C connector (D-sub 9 pins) Model 5881-11-020 (9 pins –9 pins / 2.0m) for
external communication is available at option. When a customer procures it,
please use the inch pitch screw type.
2.2 ●Cautions for handling
Since the Model 8525 deals high voltage, it is designed paying special attention to safety.
However, it is still dangerous as it outputs high voltage of max. 5kV. An erroneous
handling may cause fatal accident. In order avoid any accident, please strictly observe
the following cautions and take utmost care for safety.
(1) Make sure to connect the protective grounding terminals (back panel) to the earth. If
the grounding is insufficient, the tester housing is charged with high voltage when the
output is short-circuited to the earth or the power source line, and is very dangerous.
Please also check if the grounding cable is disconnected or not.
WARNING
Insufficient grounding may cause the electric shock.
(2) Never touch the output terminals, high voltage cable and test samples during the test.
(3) When making a connection to the test sample, connect the LOW side prior to the other,
with the output OFF.
(4) When operating the Model 8525, put a rubber glove for prevention of electric shock.
CAUTION

7
3. Name of parts and functions
3.1 ●Front panel
①POWER Power supply switch. Press right to turn ON and left to turn OFF.
②STOP Switch to interrupt the test operation and to reset a judgement.
③START Switch to start the test.
This switch is disabled when the REMOTE connector ⑤is used, or the
remote operation is made through the REMOTE terminal blocks or
the REMOTE/OUT connector ⑱.
④TEST VOLTAGE Knob to adjust the voltage of withstanding voltage test.
⑤REMOTE Connector for remote control.
⑥HIGH VOLTAGE High voltage side terminal of the test voltage output.
It outputs high voltage during the test, so never touch it during the
DANGER lamp ⑩is lit up. The operator may suffer electric shock.
It is common with HIGH VOLTAGE on the back panel.
⑦LOW Low voltage side terminal of the test voltage output. It is of the same
voltage as the case of this tester.
⑧Output voltmeter Electrical instrument to indicate the output voltage value.
⑨Zero adjuster Knob to adjust the zero position of the voltmeter for withstanding voltage
tester. The adjustment is done when no power is applied.
⑩DANGER lamp It gives warning during the test voltage is output.
Never touch the high voltage cable and test sample during the DANGER
lamp ⑩is lit up. The operator may suffer electric shock.
ｋＶ
ON/OFF ENTER SHIFT
DANGER
ＬＯＷＬＯＷ
ＨＩＧＨＨＩＧＨ
ＧＯＯＤ ＧＯＯＤ
Ｗ－ＴＥＳＴ ＲＥＡＤＹ
ＲＥＭＯＴＥ
ＫＥＹ ＬＯＣＫ
ＳＥＴＬＯＷ ＭΩ
ＳＥＴＨＩＧＨ
Ｉ－Ｗ
Ｗ－Ｉ
Ｉ
Ｗ
Ｉ－ＴＥＳＴ
W
Ｉ ＤＣ
ＡＣ
ｋＶ
ｋＶ
Ｎｏ．
s
Ｍ
ＤＩＳＣＨＡＲＧＥ
Ｊ Ｕ Ｄ Ｇ ＥＭＥＭＯＲＹ Ｍ Ｏ Ｄ ＥＲＡＮＧＥ Ｔ Ｉ Ｍ Ｅ
Ｃ Ｕ Ｒ Ｒ Ｅ Ｎ Ｔ ／ Ｒ Ｅ Ｓ Ｉ Ｓ Ｔ Ａ Ｎ Ｃ ＥＡＣ ＴＥＳＴ ＶＯＬＴＡＧＥ
OUTPUT
MAX 5kV
Ｗ／Ｉ ＡＵＴＯ ＴＥＳＴＥＲ ＭＯＤＥＬ ８５２５
MIN MAX
EXIT LOCK WRITE READ
POWER START STOP
REMOTEHIGH VOLTAGE LOW
TEST VOLTAGE
ｍＡ
BUZZER
8 9 10 11 12 13
7 6 5 4 3 2 1

8
Name of parts and functions
⑪Buzzer hole Hole to let the buzzer sound be audible at the time of judgement.
WARNING
Do not put any thing in the buzzer hole or insert a screwdriver or else.
●It may cause electric shock if touched with metal piece.
●It may also cause trouble of breakdown or mal-function.
⑫Display section Displays the information of test condition, test result and so on.
READY lamp Lit up in READY status.
REMOTE lamp Lit up when the remote control is done.
During this lamp is lit up, the START switch ③is disabled.
KEY LOCK lamp Lit up when the key lock function is turned ON.
During this lamp is lit up, the switches other than the START switch ③
and the STOP switch ②are disabled.
DISCHARGE lamp Lit up when the status is READY and the discharge function is turned ON.
During the test it turns OFF, and after the insulation resistance test, it is lit
up during the discharging.
W-I lamp Lit up when the test mode moves W-test →I-test.
I-W lamp Lit up when the test mode moves I-test →W-test.
Wlamp Lit up when the test mode is withstanding voltage test.
Ilamp Lit up when the test mode is insulation resistance test.
Range display W AC Displays the voltage range of withstanding voltage test. (2.5kV or 5.0kV)
(RANGE) I DC Displays the voltage range of insulation resistance test. (0.5kV or 1.0kV)
Voltage display of During the setting of referential voltage, it displays the set value, and during
Withstanding volt. test the test, it displays the output voltage value.
(AC TEST VOLTAGE)
Current/resistance (1) During the setting of high and low leak current, it displays the set value
display of leak current, and during the test, it displays the measured value.
(CURRENT/ (2) During the setting of high and low resistance, it displays the set value
RESISTANCE) of resistance, and during the test, it displays the measured value.
mA lamp Lit up during the withstanding voltage test to indicate that the value
displayed on the current/resistance display is leak current value.
MΩlamp Lit up during the insulation resistance test to indicate that the value
displayed on the current/resistance display is insulation resistance
value.
○○
W
READY
REMOTE
DISCHARGE
KEY LOCK
AC TEST VOLTAGE
MODEJUDGETIME
RANGE
CURRENT/RESISTANCE
MΩLOW
GOOD
HIGH
LOW
GOOD
HIGH
LOW
○
W-TEST
○
○
○
○
○
DC
ACW M
MEMORY
SET
SET
kV s
kV
No.
HIGH
mA
○
○
I
I-TEST
I
I-W
W-I
○
○○

9
Name of parts and functions
Test time display Displays the test time of each test (withstanding voltage and insulation
(TIME) resistance test). During the test it display the time remaining.
When the test time is set to OFF, the time lapse is displayed during the test.
Mlamp Lit up during time of mask timer, in the insulation resistance test.
HIGH SET (1) Lit up at the setting of high limit leak current, during the W-test.
(2) Lit up at the setting of high limit resistance, during the I-test.
LOW SET (1) Lit up at the setting of low limit leak current, during the W-test.
(2) Lit up at the setting of low limit resistance, during the I-test.
GOOD (1) W-test side: Lit up after the W-test when the test result is acceptable.
(2) I-test side: Lit up after the I-test when the test result is acceptable.
HIGH (1) W-test side: Lit up after the W-test when the test result is rejected for
its high limit.
(2) I-test side: Lit up after the I-test when the test result is rejected for its
high limit.
LOW (1) W-test side: Lit up after the W-test when the test result is rejected for
its low limit.
(2) I-test side: Lit up after the I-test when the test result is rejected for its
low limit.
Memory No. display Displays memory number being set in the memory mode.
(MEMORY No.)
W-TEST lamp Lit up when the W-test is started and turns off when the test is finished.
I-TEST lamp Lit up when the I-test is started and turns off when the test is finished.
⑬Setting keys Keys to set the test condition such as referential voltage, leak current, test
time etc. and to write in or read out the memory.
key Key to feed and select each setting item toward left.
WRITE (When pressed together with SHIFT key, it becomes WRITE key used
for writing the memory.)
key Key to feed and select each setting item toward right.
READ (When pressed together with SHIFT key, it becomes READ key used
for read-out of the memory.)
▲key Key to increase the first digit of the set value one by one digit.
(When pressed together with SHIFT key, it becomes key used to
increase the second digit of the set value one by one digit.
When kept pressed, the digit continuously increases.
▼key Key to decrease the first digit of the set value one by one digit.
(When pressed together with SHIFT key, it becomes key used to
decrease the second digit of the set value one by one digit.
When kept pressed, the digit continuously decreases.
ON/OFF key Key for selection to set or not to set each setting item.
LOCK (When pressed together with SHIFT key, it becomes LOCK key and is
used to set/reset the key lock.)
ENTER key Key to finish the setting of test condition or to decide in memory setting.
EXIT (When pressed together with SHIFT key, it becomes EXIT key used to
interrupt the setting or memory mode and return to READY status.)
SHIFT key Shift key to use together with one of other keys.
(The function indicated on each key in blue letters becomes effective.)
ON/OFF ENTER SHIFT
WRITE READ LOCK EXIT

10
Name of parts and functions
3.2 ●Rear panel
⑭Protecting grounding Terminal for grounding to the earth.
terminal Make sure to ground to the earth using the attached earth cable (green).
It is the same voltage as the case of the tester.
⑮FUSE 7A Fuse socket. The rate of fuse is as the following table shows.
Type
Power source voltage
Rate of fuse
Standard
100VAC
125V 7A
Optional
115V AC
200VAC
250V 4A
220VAC
240VAC
Do not use the fuse other than rated one.
⑯100V~50/60Hz Inlet for connection of supply power source.
It conforms to the attached power cord (3P).
⑰RS-232C Connector for RS-232C serial communication (D-sub 9 pins).
Refer to the instruction manual of interface.
⑱REMOTE/OUT Connector for the setting inputs of interlock and to output the output signals.
For detail, refer to the article 14.1 (P59).
⑲HIGH VOLTAGE High voltage side terminal of test voltage output.
It outputs high voltage during the test, so never touch it during the
DANGER lamp ⑩is lit up. The operator may suffer electric shock.
It is common with HIGH VOLTAGE on the front panel.
⑳LOW Low voltage side terminal of the test voltage output. It is of the same
voltage as the case of this tester.
VOLTAGE MONITOR Monitor output of withstanding voltage output.
Output voltage: 0~5V DC (to 0~5kVAC)
100V 50/60Hz
FUSE 7A
CC CREAR:ONSTOPSTART
REMOTE
aｃ
ＮＣ
STATUS OUT
注 意
ＣＡＵＴ ＩＯＮ
PROTECT IVE EARTH TERM INAL .
ENSUREGROUND INGOF
大地アースして ください 。
保護接地端子は確実に
RS-232C
REMOTE/OUT
LOW
HIGH VOLTAGE
＋ －
VOLTAGE MONITOR
OUTPUT MAX 5kV
1918171615
2021222314

11
Name of parts and functions
REMOTE Terminal blocks for remote control.
START C When the REAR:ON C terminal is in short-circuit, the test is started by
short-circuiting the START C terminal.
When the REMOTE connector ⑤is in use, START C terminal is
disabled.
STOP C By making the short-circuit between the terminals, the test action can be
interrupted and the judgement result can be reset.
REAR:ON C By making the short-circuit between the terminals, the start of the test
becomes possible from the rear terminals. The START switch ③on
the front panel becomes ineffective.
For detail, refer to the article 13 (P55).
STATUS OUT Terminal blocks for status output.
For detail, refer to the article 15 (P62).

12
4. Preparation prior to use
4.1 ●Zero adjustment of output voltmeter
Before powering ON the power source switch, please confirm that the pointer of the
output voltmeter indicates “0”.
If it is deviated, make an adjustment turning the zero adjuster ⑨with the screwdriver.
4.2 ●Connection of protective ground terminal
Make sure to connect the protective grounding terminals (back panel) to the earth. If the
grounding is insufficient, the tester housing is charged with high voltage when the output
is short-circuited to the earth or the power source line, and is very dangerous.
Please also check if the grounding cable is disconnected or not.
WARNING
Insufficient grounding may cause the electric shock.
4.3 ●Connection with external control device
An external control device can be connected to the REMOTE connector ⑤,
REMOTE terminal , REMOTE/OUT connector ⑱and STATUS OUT
terminal .
For detail of connection, refer to the article 13~15 (P55~63).
4.4 ●Connection of high voltage cable
Choice of output section
Make a choice where to take out the high voltage output, either from the front panel or
from the rear panel. During the test, the high voltage output terminal at both front and
rear panel are charged with high voltage.
When the front panel is selected
Make a connection of the attached high voltage cable to the HIGH VOLTAGE terminal
⑥and LOW terminal ⑦.
When the rear panel is selected
Make a connection of the attached high voltage cable to the HIGH VOLTAGE terminal
⑲and LOW terminal ⑳.
Use the attached high voltage cable or the cable appropriates to the voltage to use.
WARNING
●Before making a connection of high voltage cable, ensure that the output
is OFF and the output voltmeter ⑧indicates “0”V.
There is a danger of electric shock.
●Avinyl coating of alligator clip of the attached high voltage cable has no
insulation withstandibility, so never touch it during the test.
There is a danger of electric shock.
●Take out the high voltage output at either side, front or rear panel.
Never use the both sides together, as it is very dangerous.

13
Preparation prior to use
After connecting the low voltage side cable to the LOW terminal, make sure to fix
the locking metal to the terminal.
Fasten the U-shape ditch side to the LOW terminal of the tester main unit.
WARNING
If the low voltage side cable is disconnected, whole the test sample is charged
with high voltage and may cause a danger of an electric shock.
4.5 ●Connection of power supply cable
After confirming that the power supply switch POWER ①is OFF, connect the
attached power source cord to the inlet for the supply source power on the rear panel.
Connect the plug (3P) of power source cord to the socket with the earth connection.
WARNING
Confirm that the power source voltage is 100VAC, and use the tester within
the range of 90V~110VAC. Use of the tester out of this range causes a
breakdown or incomplete operation. In case of optional non-standard power
source voltage, use the tester within ±10% of the nominal voltage.
4.6 ●Throw in and shut off of power source
Before turning ON the POWER switch ①and throw in the power, confirm that the
TEST VOLTAGE knob ④is completely turned anti-clockwise to the end.
For shut off of the power supply, turn the TEST VOLTAGE knob ④clockwise
completely to the end, and after confirming the DANGER lamp ⑩is turned off
and the output voltmeter ⑧indicates 0V, turn OFF the POWER switch ①.
WARNING
While the test voltage is output, do not turn OFF the POWER switch ①,
as it will cause the breakdown, excepting such emergency case that the
voltage output can not decreased even though the STOP switch is pressed.
The test conditions at the time of power shutdown are retained even if the power is turned
OFF and the tester returns with these test conditions when the power is turned ON again.
4.7 ●Before the test
(1) Before powering on the tester, carefully read the article 2.2 Cautions for handling.
(2) For about 3 seconds after the power source switch is turned ON, whole the display
segments are lit up (lamp test), and after the while lighting is finished, the tester
enters into the test mode the last time when the power is turned OFF.
８５２５
Main
LOW terminal ⑦or ⑳LOW voltage side cable（black）
Locking metal

14
5. Setting items in each mode
5.1 ●READY status
When turned ON the POWER switch ①, all the display segments are lit up for about 3
seconds and then READY switch is lit up, entering into READY status.
In READY status of automatic test mode (W-I, I-W), the setting of test condition of the
withstanding voltage test and insulation resistance test are alternatively displayed at the
cycle of 2 seconds.
The test condition when the power was turned OFF last time is displayed.
Pressing the START switch ③starts the test.
In READY mode, the setting of the following items can be done.
Items to set
Test condition Refer to the article 7~9 (P16~34)
Key lock Refer to the article 7.3 (P17)
Buzzer sounding Refer to the article 17 (P65)
Status output Refer to the article 15 (P62~63)
Special function Refer to the article 12 (P54)
①Double action
②GOOD hold
③Momentary
④FAIL mode
5.2 ●Setting mode of test condition
In READY status, by pressing the (or ) key, READY is turned off and the
tester enters into the test condition setting mode.
In the test condition setting mode, the test mode and condition can be set or changed.
A press of ENTER key finishes the setting and the tester becomes READY status.
Item to set
Test mode Test condition
Ref. art. 7.2 (P16) Ref. art. 8~9 (P18~34)
5.3 ●Memory write-in mode
After setting the test condition in the test condition setting mode, press the WRITE key
(SHIFT + ), then the memory number blinks, being ready to write in the memory.
In the memory write-in mode, 9 memory sets can be written. Each memory set consists
of 4 items of test conditions which are set in the test condition setting mode.
A press of ENTER key finishes the setting and the tester becomes READY status.
Item to set
Test condition →Memory write-in (No.1) →Test condition →
Ref. art. 7.2 (P16) Ref. art. 10.2 (P36) Ref. art. 7.2 (P16)
Memory write-in (No.2) Test condition →Memory write-in (No.9)
Ref. art. 10.2 (P36) Ref. art. 7.2 (P16) Ref. art. 10.2 (P36)
5.4 ●Memory read-out mode
In READY status, by pressing the READ key (SHIFT + ), a memory No. blinks
and the tester becomes ready to read out the memory. In the memory read out mode, one
of the 9 memories written in [ref. art. 10.3 (P37)] can be called up and read out.
A press of ENTER key finishes the setting and the tester becomes READY status.
Item to set
Memory read out (Select memory No.) Ref. art. 10.3 (P37)

15
6. Kind of test and flow of setting
6.1 ●Kind of test
W-I (Withstanding voltage test →Insulation resistance test)
Automatic test
(AUTO) I-W (Insulation resistance test →Withstanding voltage test)
W (Withstanding voltage test)
Single test
I (Insulation resistance test)
6.2 ●Flow of setting
READY status
＜or ＞key
W: Withstanding voltage test
I: Insulation resistance test
After the setting, the mode previously set is initially lit up.
W-I
blinks
＞
＜W-I is lit up
＞
＜
＜
＞
＜
I-W
blinks
＞
＜
＞ ＜
＞
＜
＞ ＜
＞
＜
Withstanding voltage test
→Insulation resistance test
Insulation resistance test
→Withstanding voltage test
Withstanding voltage test
Insulation resistance test
Memory of ENTER key
to memorize the set value
EXIT key
(SHIFT+ENTER)
YES
NO
Note: When the memory is not used.
The content of setting set last is memorized
for both withstanding voltage and insulation
resistance test, even if the "W" or "I"
single mode test is selected.
Flow of setting for withstanding voltage test
withstanding voltage test
READY status
＜
＜
＜
Referential
voltage
High limit
leak current
Low limit
leak current
＞
＜
＞
＜
＞
＜
＞
＜
Range Test time
＞
W-I blinks at delivery from factory.
Setting of test condition of
W-I is lit up
insulation resistance test
Setting of test condition of
I-W is lit up
＞
＜
insulation resistance test ＞
Setting of test condition of
I-W is lit up
withstanding voltage test
Setting of test condition of
＞
W is lit up
withstanding voltage test
Setting of test condition of
＞
I is lit up
insulation resistance test
Setting of test condition of
W
blinks
I
blinks
setting
Flow of setting for insulation resistance test
＞
＜
＞
＜
＞
＜
＞
＜
Range
High limit
resistance
value
Mask timer
time Test time ＞
＜
Discharge
function
Low limit
resistance
value

16
7. Setting of test item
7.1 ●Status of display and expression in instruction manual
Digital display
Flat display
LED lamp
Lit-up mode
GOOD
●W-TEST
Blinking mode
GOOD
◎W-TEST
Turn-off mode
GOOD
○W-TEST
The above displays are expressed as follows in this instruction manual.
Display
Explanation
Example
Digital display
Lit up or blinking as above.
Operation switch
Name surrounded by line + switch
START switch
Set key
Name surrounded by line + key
SHIFT key
Flat display
Name surrounded by line
GOOD
LED lamp
Name + lamp
W-TEST lamp
7.2 ●Setting of each test item
The following 4 test modes can be set.
(1) W-I (Withstanding voltage test →Insulation resistance test)
Automatic test
(AUTO) (2) I-W (Insulation resistance test →Withstanding voltage test)
(3) W (Withstanding voltage test)
Single test
(4) I (Insulation resistance test)
①To enter the selection of test mode
In READY status, press or key, then the lamp of memorized test mode
blinks. Test mode lamp moves up and down with ▲or ▼key. Select the
required test mode lamp (make the lamp blinking). Press ENTER key to decide
and the tester returns to READY status.
②To enter the setting mode of automatic test (AUTO)
From the condition ①above, press or key while W-I lamp (W-test →
I-test) or I-W lamp (I-test →W-test) is blinking, then the tester enters the setting of
condition of withstanding voltage or insulation resistance test.
③To enter the withstanding voltage test (single test)
From the condition ①above, press or key while Wlamp (W-test) is
blinking, then the tester enters the setting of the condition of withstanding voltage test.
④To enter the insulation resistance test (single test)
From the condition ①above, press or key while Ilamp (I-test) is
blinking, then the tester enters the setting of the condition of insulation resistance test.
○○
W
READY
REMOTE
DISCHARGE
KEY LOCK
AC TEST VOLTAGE
MODEJUDGETIME
RANGE
CURRENT/RESISTANCE
MΩLOW
GOOD
HIGH
LOW
GOOD
HIGH
LOW
○
W-TEST
○
○
○
○
○
DC
ACW M
MEMORY
SET
SET
kV s
kV
No.
HIGH
mA
○
○
I
I-TEST
I
I-W
W-I
● ◎
●

17
Setting of test item
7.3 ●Key lock
Key lock disables the operation by the switches other than START switch ③and
STOP switch ②. When remote controlled, the start is made through the remote
control.
Setting procedure of key lock
①In READY status, keep pressing for 3 seconds or more the LOCK key ( SHIFT
and ON/OFF at a time). While pressing, KEY LOCK lamp blinks.
②KEY LOCK lamp is then lit up and the key lock function is set up.
Cancellation of key lock
①While KEY LOCK lamp is lit up, press again the LOCK key ( SHIFT and
ON/OFF at a time) for 3 seconds or more. For 3 seconds being pressed,
KEY LOCK lamp blinks.
②KEY LOCK lamp is then turned off and the key lock function is cancelled.
ON/OFF ENTER
WRITE READ LOCK
○○
BUZZER
READY
REMOTE
DISCHARGE
KEY LOCK
EXIT
AC TEST VOLTAGE
MODEJUDGETIME
RANGE
CURRENT/RESISTANCE
SHIFT
MΩLOW
GOOD
HIGH
LOW
GOOD
HIGH
LOW
○
W-TEST
HIGHmA
○
○
○
○ ●
●
●●
○
●
DC
ACW M
MEMORY
SET
SET
kV s
kV
No.
W
I
I-TEST
I
I-W
W-I

18
8. Setting of test condition for withstanding voltage test
The test condition can be set when the test mode W-I, I-W or W is selected.
W-I is the automatic test mode of withstanding voltage test →insulation resistance test.
I-W is the automatic test mode of insulation resistance test →withstanding voltage test.
W is the single test mode of withstanding voltage test.
8.1 ●Test range of withstanding voltage test
Range to set: 2.5kV or 5kV
To enter setting mode
①In READY status, press or key, then the memorized test mode lamp blinks.
Test mode lamp moves up and down with ▲or ▼key. Make the required test
mode lamp blinking (W-I, I-W or Wlamp).
②Press or key and make the test mode lamp lit.
Setting of test voltage range
①During the setting mode, press or key and, select the lit up W AC lamp and
blinking test voltage range (refer to the above figure).
②Switch the test voltage to 2.5kV or 5kV with ▲or ▼key.
When the test voltage range is switched, the range display displays the switched
voltage value in blinking. Press or key, then the voltage value changes
from blinking to lit-up and moves to the next item of condition setting.
Interruption of setting
If the EXIT key ( SHIFT and ENTER at a time) is pressed while the display of test
voltage range, referential voltage, current or test time is blinking, the test condition setting
mode is interrupted and becomes to READY status.
The test mode then is the condition before entering the test condition setting mode.
To the next setting
Press key, then changes to the setting of referential voltage.
Note: If key is pressed, it changes to the setting below depending on the test item.
Test item
Setting item after movement
W-I (withstanding voltage test →
insulation resistance test
Returns to blinking of
W-I test mode lamp.
I-W (insulation resistance test →
withstanding voltage test
Setting of discharge function of
insulation resistance test.
W(withstanding voltage test) single test
Returns to blinking of
Wtest mode lamp.
Finish of setting
Press ENTER key, then the setting is memorized and returns to READY status.
ON/OFF ENTER
WRITE READ LOCK
○○
BUZZER
W
READY
REMOTE
DISCHARGE
KEY LOCK
EXIT
AC TEST VOLTAGE
MODEJUDGETIME
RANGE
CURRENT/RESISTANCE
SHIFT
MΩLOW
GOOD
HIGH
LOW
GOOD
HIGH
LOW
○
W-TEST
○
○
○
○
○
DC
ACW M
MEMORY
SET
SET
kV s
kV
No.
○
○
○
I
I-TEST
I
I-W
W-I
● ●
mA HIGH

19
Setting of test condition for withstanding voltage test
8.2 ●Referential voltage
Adjustable range: 0.00~5.00kV
This is the voltage to apply to the sample to be tested, and which is to be set according to
the specifications of the test sample.
Once the referential voltage is set, the test is stopped unless the test voltage set by the
TEST VOLTAGE knob ④comes within the range of referential voltage (within ±5%
of set value). [In case of 1000V or less, within ±50V(±5digit)]
In case that the test voltage is lower than the range of referential voltage, the tester waits
for 5 seconds, and when exceeded the range, it immediately stops the test.
On this occasion, the timer does not works and the W-TEST lamp blinks.
When the test voltage goes out of the range of referential voltage, the test is also stopped.
When the setting of referential voltage is not required, it can be turned OFF.
[When turning OFF the setting of referential voltage]
To enter setting mode
①In READY status, press or key, then the memorized test mode lamp blinks.
Test mode lamp moves up and down with ▲or ▼key. Make the required test
mode lamp blinking (W-I, I-W or Wlamp).
②Press or key and make the test mode lamp lit.
To turn OFF the setting of referential voltage
①During the setting mode, press or key.
②The test voltage display blinks and the setting of referential voltage is enabled.
③If the setting of referential voltage is not required, press ON/OFF key and select the
status that the display blinks with (refer to the above figure).
Interruption of setting
If the EXIT key ( SHIFT and ENTER at a time) is pressed while the display of test
voltage range, referential voltage, current or test time is blinking, the test condition setting
mode is interrupted and becomes to READY status.
The test mode then is the condition before entering the test condition setting mode.
To move to the previous setting
Press key, then changes to the setting of the range of withstanding voltage test.
To the next setting
Press key, then changes to the setting of high limit of leak current.
Finish of setting
Press ENTER key, then the setting is memorized and returns to READY status.
ON/OFF ENTER
WRITE READ LOCK
○○
BUZZER
W
READY
REMOTE
DISCHARGE
KEY LOCK
EXIT
AC TEST VOLTAGE
MODEJUDGETIME
RANGE
CURRENT/RESISTANCE
SHIFT
MΩLOW
GOOD
HIGH
LOW
GOOD
HIGH
LOW
○
W-TEST
○
○
○
○
○
DC
ACW M
MEMORY
SET
SET
kV s
kV
No.
○
○
○
I
I-TEST
I
I-W
W-I
mA HIGH
● ●