TongHui TH5101D, TH5101E Withstanding Voltage & Insulation Tester Operation manual

OPERATION MANUAL
MO DE L T H5 10 1D / TH 51 0 1E
WITHSTANDING VOLTAGE
& INSULATION TESTER
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Content
Chapter 1 Introduction ............................................................................................................... 1
1.1 Introduction.................................................................................................................... 1
1.2 Feature ............................................................................................................................ 1
Chapter 2 Installation and preparation..................................................................................... 3
2.1 Unpacking....................................................................................................................... 3
2.2 Precautions for Installation........................................................................................... 3
2.2.1 Do not use the tester in a flammable atmosphere. ........................................... 3
2.2.2 Avoid locations where the tester is exposed to high temperatures or direct
sunlight. ........................................................................................................................ 3
2.2.3 A void humid environments. .............................................................................. 3
2.2.4 Do not place the tester in a corrosive atmosphere............................................ 3
2.2.5 Do not locate the tester in a dusty environment. .............................................. 3
2.2.6 Do not use the tester where ventilation is poor................................................. 3
2.2.7 Do not place the tester on a tilted surface or in a location subject to
vibrations...................................................................................................................... 4
2.2.8 Do not use the tester in locations affected by strong magnetic or electric
fields. ............................................................................................................................. 4
2.2.9 Do not use the tester in locations near a sensitive measuring ......................... 4
2.2.10 Secure adequate space around the power plug. ............................................. 4
2.3 Power cable..................................................................................................................... 4
2.4 Connection power cable ................................................................................................ 4
2.5 Ground............................................................................................................................ 4
Chapter 3 Warning ...................................................................................................................... 6
3.1 Preparation..................................................................................................................... 6
3.1.1 Wear insulation glove ......................................................................................... 6
3.1.2 Ground................................................................................................................. 6
3.2 Warning and note .......................................................................................................... 6
3.2.1 Before turn on AC input..................................................................................... 6
3.2.2 Connect low terminal test lead .......................................................................... 6
3.2.3 Connect high voltage test line ............................................................................ 6
3.2.4 Before change parameter ................................................................................... 6
3.2.5 Stop testing .......................................................................................................... 6
3.2.6 Dangerious accessary.......................................................................................... 6
3.3 Warning after turning off power .................................................................................. 6
3.3.1 Items need checking after turning off power.................................................... 7
3.3.2 Remaining high voltage ...................................................................................... 7
3.4 Warning of remote control ............................................................................................ 7
3.5 Forbiden ......................................................................................................................... 7
3.5.1 Don’t turn on and off power rapidly and repeatly........................................... 7
3.5.2 Don’t short to ground ......................................................................................... 7
3.6 Operation under emergency ......................................................................................... 8
3.7 Breakdown...................................................................................................................... 8
3.7.1 Don’t use broken tester ...................................................................................... 8
3.7.2 High voltage indicator ........................................................................................ 8
3.8 Power, temperature and other limitation..................................................................... 8
Chapter 4 Description of front and rear panel.......................................................................... 9
4.1Instruction of front panel ............................................................................................. 10
4.2 Instruction .................................................................................................................... 17
4.3 Instruction of rear panel ............................................................................................. 20
Chapter 5 Preparation before testing....................................................................................... 21
5.1 Initiated setting ............................................................................................................ 21
5.2 Check ............................................................................................................................ 21
5.3 Check the instrument before testing .......................................................................... 22
Chapter 6 Test procedure.......................................................................................................... 23
6.1 AC withstanding voltage test ...................................................................................... 23
6.1.1 Select a AC range .............................................................................................. 23
6.1.2 Set high limit cutoff current............................................................................. 23
6.1.3 Set low limit cutoff current .............................................................................. 23
6.1.4 Set test time ....................................................................................................... 24
6.1.5 Set test voltage................................................................................................... 24
6.1.6 Connection of DUT ........................................................................................... 25
6.1.7 Test ..................................................................................................................... 25
6.1.8 Repeat testing .................................................................................................... 26
6.2 Insulation resistance test： ......................................................................................... 27
6.2.1 Select a DC test voltage range.......................................................................... 27
6.2.2 Set low limit reference resistance..................................................................... 27
6.2.3 Set high limit reference resistance ................................................................... 28
6.2.4 Set test time ....................................................................................................... 28
6.2.5 Connection of DUT ........................................................................................... 28
6.2.6 Test ..................................................................................................................... 28
6.2.7 Repeat testing .................................................................................................... 28
6.3 Auto switch test of withstanding voltage to insulation ............................................. 28
6.3.1 Instruction of entering range ........................................................................... 29
6.3.2 Setting of AC-IR parameter............................................................................. 29
6.3.3 Setting of wait time of AC-IR........................................................................... 29
6.3.4 Test procedure ................................................................................................... 29
6.3.5 Test ..................................................................................................................... 29
6.3.6 Repeat testing .................................................................................................... 32
6.4 Auto switch test of insulation resistance to withstanding voltage......................... 32
6.4.1 Instruction of entering range ........................................................................... 32
6.4.2 Setting of IR-AC parameter............................................................................. 32
6.4.3 Setting of wait time of IR - AC......................................................................... 32
6.4.4 Test procedure ................................................................................................... 32
6.4.5 Test ..................................................................................................................... 32
6.4.6 Repeat testing .................................................................................................... 33
6.5 Remote control ............................................................................................................. 33
6.5.1Remote control by connector ............................................................................ 33
6.5.2 Pass signal input/output connector remote control........................................ 33
6.5.3 Interlock function ............................................................................................. 34
6.5.4 Start/stop control............................................................................................... 35
6.5.5 Output signal..................................................................................................... 35
6.6 Special mode setting .................................................................................................... 35
6.6.1 Dual effect mode ............................................................................................... 36
6.6.2 Pass hold mode.................................................................................................. 36
6.6.3 Instant test mode............................................................................................... 36
6.6.4 Fail pass mode ................................................................................................... 36
Chapter 7 RS-232C interface.................................................................................................... 37
7.1 Connection cable.......................................................................................................... 37
7.2 RS-232C specification............................................................................................... 37
7.3 Communication method .............................................................................................. 37
7.4 Communication mode ................................................................................................. 37
7.5 Notes before using RS-232C........................................................................................ 39
7.6 RS-232C command and respondance ..................................................................... 40
Chapter 8 Specification ............................................................................................................. 43
8.1Basic specification of AC withstanding voltage.......................................................... 43
8.2 Basic performance of insulation resistance ............................................................... 44
8.3 Interface and other function ....................................................................................... 45
8.4 Signal input/output ...................................................................................................... 45
8.5 General specification ................................................................................................... 46
8.6 Accessary ...................................................................................................................... 46
Chapter 9 Daily warrenty ......................................................................................................... 47
9.1 Clean ............................................................................................................................. 47
9.2 Check test line and power line .................................................................................... 47
9.3 Warrenty....................................................................................................................... 47
9.4 Calibration ................................................................................................................... 47
Chapter 1 Introduction
1.1 Introduction
TH5101D/TH5101E is a kind of instrument for performing withstanding voltage
and insulation test in electrical device and component.
！
：
z In this instrument, there are variable safe measures to protect operator
to avoid danger. However, when the high voltage is applied in DUT, the
electrical shock will be caused in test lead, probe and output terminal
if touching the device under test accidently.
z Be sure to provide overall protection around instrument and DUT to avoid
electrical shock——such as use rope to encompass the test zone to avoid
people to approach.
1.2 Feature
⒈ The instrument observes main industrial standard
The instrument can perform withstanding voltage (insulation intensity) and
insulation resistance test in electrical device and component according to related
electrical standard and rule.
⒉ Volume of transformer
TH5101D installs a transformer with the volume of 500VA，and TH5101E
installs a transformer with the volume of 200VA
⒊ Reasonable planning of key and switch
All keys are on the panel for easier operation. In order to set high limit current,
low limit current, high limit resistance value, low limit resistance value, test time, set
increasing and decreasing key. The reasonable arrangement and VFD display help
you operate the instrument correctly.
⒋ VFD
There is a VFD displayer for clearly displaying information：test condition，test
status，test value，pass/fail judge result .etc.
⒌ A analogy voltage meter and digital voltage meter
This instrument installs an analogy voltage meter（±5%FS）and a digital voltage
meter（±1.5FS）. The former one can help you control voltage rapidly, but the latter
one can read data more conveniently and accurately.
⒍ Digital current meter/digital ohm meter
Digital current meter can be used to display the current flowing through DUT.
⒎ Pass/fail judge
When the test current flowing through DUT is higher than the high limit value or
lower than low limit value, fail judge signal will be generated. Low limit judge check
function help improve the reliability. The instrument has independent indicator and
signal output for each malfunction which can help us find out the reason.
8. Digital timer
Timer allows the test time of high voltage being applied to DUT. Preset range：
0.2—999s. when timer is ON，the time is countdown digit，timer displays the
remaining test time.
9. Remote control function
The instrument has the operation of remotely-controlled start/stop. There are
-1-
5-pin connector on the front panel（selectable remote control box or high voltage test
probe），there are 25 core cable lead on the rear panel. Remote control function and
status signal function will help you test efficiently.
10．Status signal
25 core cable lead on the rear panel is used to transfer 7 status signal （with
remote control signal）. The seven signals are HV-ON，TEST，PASS，U-FAIL，
L-FAIL，READY，PROTECTION.
11. Compaction and light
Model
TH5101D
TH5101E
Dimension
320mm(W)*132mm(H)*300(D)
Weight
13kg
10kg
12. Protection
When you turn off the instrument，the test status will be stored in non-volatile
memory. When you turn on the instrument again, the instrument will recover the
stored information.
13. Safe high voltage output terminal
Using lead to insert into high voltage output terminal is much safer.
14. Indicator
When the electric charge is in high voltage output terminal, the indicator will
light to warn the electrical shock.
15. Interlock function
There is interlock function for cutting voltage with external device. When the
function is activated, the output will be cut to refuse test.
16. Keylock function
This function is to warn operator to use the keyboard incorrectly.
17. Noise rejection circuit
The inner circuit design can reject noise well to improve the reliability.
18. RS-232C interface
The result is output to computer or printer.
-2-
Chapter 2 Installation and preparation
2.1 Unpacking
Upon receiving the product, confirm that the necessary accessories are included
and have not been damaged in transit. Should any damage or shortage be found,
please contact TongHui distributor/agent.
Accessory：
1 TH90001R withstanding voltage test lead ；
1 TH90001B withstanding voltage ground lead；
1 TH90002 withstanding voltage test rod；
1 TH5100-IL cable(25 core)；
1 Power cable；
Manual operation；
2.2 Precautions for Installation
Be sure to observe the following precautions when installing the tester.
2.2.1 Do not use the tester in a flammable atmosphere.
To prevent explosion or fire, do not use the tester near alcohol, thinner, or other
combustible materials, or in an atmosphere containing such vapors.
2.2.2 Avoid locations where the tester is exposed to high temperatures or direct
sunlight.
Do not locate the tester near a heater or in areas subject to drastic temperature
changes.
Operating temperature range: 0 °C to +40 °C
Storage temperature range: -20 °C to +70 °C
2.2.3 A void humid environments.
Do not locate the tester in a high-humidity environment—near a boiler,
humidifier, or water supply.
Operating humidity range: 20 % to 80 % RH (no dew condensation permitted)
Storage humidity range: 90 % RH or less (no dew condensation permitted)
Condensation may occur even within the operating humidity range. In that case,
do not start using the tester until the location is completely dry.
2.2.4 Do not place the tester in a corrosive atmosphere.
Do not install the tester in a corrosive atmosphere or one containing sulfuric
acid mist or the like. This may cause corrosion of various conductors and imperfect
contact with connectors, leading to malfunction and failure, or in the worst case, a
fire.
2.2.5 Do not locate the tester in a dusty environment.
Dirt and dust in the tester may cause electrical shock or fire.
2.2.6 Do not use the tester where ventilation is poor.
This tester features a forced-air cooling system. Provide sufficient space for the
air inlet on the lateral side and the air outlet on the rear side to allow air to flow.
-3-
2.2.7 Do not place the tester on a tilted surface or in a location subject to
vibrations.
If placed on a non-level surface or in a location subject to vibration, the tester
may fall, resulting in damage and injury.
2.2.8 Do not use the tester in locations affected by strong magnetic or electric
fields.
Operation in a location subject to magnetic or electric fields may cause the
tester to malfunction, resulting in electrical shock or fire.
2.2.9 Do not use the tester in locations near a sensitive measuring
Instrument or receiver.
Operation in a location subject, may cause such equipment may be affected by
noise generated by the tester.
At a test voltage exceeding 3 kV, corona discharge may be generated to produce
substantial amounts of RF broadband emissions between grips on the test leadwire.
To minimize this effect, secure a sufficient distance between alligator clips. In
addition, keep the alligator clips and test leadwire away from the surfaces of
conductors (particularly sharp metal ends).
2.2.10 Secure adequate space around the power plug.
Do not insert the power plug to an outlet where accessibility to the plug is poor.
And, do not place objects near the outlet that would result in poor accessibility
to the plug.
2.3 Power cable
The requirement of AC power cable is：
250V，50/60HZ，10A
2.4 Connection power cable
Note
¾
The instrument must be connected to a reliable AC power. From inner
structure to see AC withstanding voltage test，output voltage will be
affected by the input of AC power.
2.5 Ground
！
：
z If there is no suitable ground device, it is easy to generate electric shock.
z Be sure to connect a ground terminal to a correct ground terminal.
There are 2 methods for ground connection：
-4-
As below：
1. Connect cable line to a 3-core power correctly.
2. Connect ground terminal on the rear panel to the ground.
-5-
Chapter 3 Warning
！
：
The instrument can transfer 5kV test voltage，maybe cause electric shock. When you
operate instrument，please be careful.
3.1 Preparation
3.1.1 Wear insulation glove
Please wear insulation glove when you operate the instrument.
3.1.2 Ground
Be sure the safe ground or it will release high voltage and cause electric shock.
3.2 Warning and note
3.2.1 Before turn on AC input
Be sure voltage adjusting knob is in“0”.
3.2.2 Connect low terminal test lead
Before using instrument，be sure there is no damage in low terminal.
When DUT is connected to instrument，firstly connect low terminal test line，
then high terminal，make sure the low terminal is connected to corresponding
terminal of DUT（shell protection ground）. If connect incorrectly, the whole DUT is
charged to a danger high voltage.
3.2.3 Connect high voltage test line
1. Press stop switch.
2. Check if the indication of output voltage is in position“0”，and if the
indicator is off.
3. Connect high voltage test line to high voltage output terminal, and high
voltage test line to DUT.
3.2.4 Before change parameter
Press stop key before changing parameter，and make sure voltage adjusting
knob is in position“0”.
3.2.5 Stop testing
When stopping a test，make sure voltage adjusting knob is in position“0”
，then
press stop.
3.2.6 Dangerous accessory
The DUT, test line, and those with high voltage are dangerous.
3.3 Warning after turning off power
-6-
3.3.1 Items need checking after turning off power
If you have to touch DUT, test line, probe, output terminal and other
accessories，please make sure 2 points below：
z If output voltage indication is“0”.
z If danger light is off.
There is high test voltage in DUT after turning off power in insulation resistance test.
3.3.2 Remaining high voltage
Warning of remaining high voltage
When you perform an insulation resistance test, there is high voltage in test line,
probe, output terminal and other accessories. Even if you turn off DC voltage output,
the voltage is still existed according to working environment, during this time, please
don’t touch the referred thing below, or you will be shocked.
Before touching high voltage components, make sure the conditions below are
provided：
（1）output voltage meter indicates“0”.
（2）danger indicator is off.
Check discharge
After output is cut off，there is an inner circuit for releasing remaining high
voltage. Don’t remove DUT in testing；if DUT is removed, the remaining high voltage
will exist for a long time.
3.4 Warning of remote control
Be careful under remote control mode, because high voltage can be turned on and
off remotely！
The safe method is as below：
9 Not output voltage when setting test condition.
9 Make sure no one can touch DUT, test line, probe , output terminal and the
near zone.（Test status）
3.5 Forbidden
3.5.1 Don’t turn on and off power rapidly and repeatably
After turning off power switch, make sure there are several seconds or more
time; don’t turn on or off power switch rapidly and repeatably only under special
condition.
3.5.2 Don’t short to ground
Attention high voltage test line can’t be shorted with nearby AC power or the
device connected to ground, if being shorted, the shell may be charged to a dangerous
high voltage.
Make sure the protective ground is connected to ground！If do it correctly, there
is no danger in instrument，even when output terminal of high voltage and low
voltage is shorted, the shell can’t be charged to a high voltage.
Make sure instrument is grounded for safety！the description of ground can be
-7-
referred to 2.6“ground”.
3.6 Operation under emergency
If there is emergency（for example electrical shock discharge or burning of DUT），
adopt the methods below：
Turn off the power switch, and remove the power cable from AC power socket.
3.7 Breakdown
3.7.1 Don’t use broken tester
Even you press STOP key，high voltage indicator is on or analogy voltage meter
deflexs, it means the instrument has been damaged and at an extremely dangerous
status. If it happened, please turn off power switch and remove power line from
socket. Please contact us！Please don’t try to fix the instrument by yourself.
3.7.2 High voltage indicator
Due to the indicator or other reasons causing indicator not light, the error will
be caused if use instrument continuously, please stop using and contact us！
3.8 Power, temperature and other limitation
Use the instrument when the voltage is lower or equal to 5kV
The Max.output voltage may be higher than 5kV when there is no load. Due to
the wave of AC power voltage, it may be higher. Make sure the instrument is
operated within 5kV.
■ Provide stop time
Under AC test situation，considering that the heat consumption of high voltage
transformer and radiation condition of instrument, the stop time should be same
as test time when the high limit cutoff current is higher than 50mA. The Max.
allowed test time is 30 min. If the limitation is over passed ， high voltage
transformer may be damaged.
■ Use rated line voltage within ±10％ range
The AC line voltage must be within ±10％ range, or the instrument can’t be
operated normally. Use suitable method to transfer within the range.
■ Capacity of AC power
There is a 500VA high voltage output transformer，and it can drive several
amps output current under the conditions below：
（a）check dozens milliseconds before failure.
（b）in dozens milliseconds when setting instrument.
■
-8-
Chapter 4 Description of front and rear panel
Front panel：
9
10 8
17
TH5101D
TONGHUI
ELECTRONICS
13
11 16
14
AC/IR WITHSTANDING VOLTAGE TESTER
4
2
6
0
12
kV
HV INDICATE
LOWER ON
FUNCTION
UP/ LOW
RANGE
CUTOFF CURRENT
ON OFF
TIMER
SHIFT
MAX 5kV
0
KEYLOCK
MAX
TEST VOLTAGE
HIGH VOLTAGE
LOW
6
7
！
AC ON 30min/OFF 30min
DC ON 15s /OFF 150s
REMOTE
4
POWER
5
2
3
1
Rear panel：
4
RS-232C
3
1
SIGNAL IN/OUT
.
!
WARNING
.
※ TO AVOID ELECTRIC SHOCK,THE POWER CORD
PROTECTIVE GROUNDING CONDUCTOR OR THE
PROTECTIVE CONDUCTOR TERMINAL
MUST BE CONNECTED TO GROUND.
※ THIS INSTRUMENT CONTAINS NO OPERATOR
SERVICEABLE PARTS INSIDE; REFER SERVICING
TO SERVICE TRAINED PERSONNEL ONLY.
INPUT
~
!
PLEASE READ MANUAL FOR SAFETY
-9-
200-240V 47-63Hz
500VA Max
2
15
4.1Instruction of front panel
『1』Power switch
When you turn on power，the instrument will restore the stored test condition of
last time（for example cutoff current, test time setting）. Press shift when turning on
power switch, it will back to initialized test condition，restore to initialized setting
（default value），the former stored test condition will be lost.
Item
Initialized set value
High limit cutoff current
0.2mA
Low limit cutoff current
Low limit reference value
High limit reference resistance
0.1mA
2.00MΩ
3.00 MΩ
Low limit pass/fail judge（AC） Off
Low limit pass/fail judge（IR） Off
Test time(AC)
0.5s
Test time(IR)
0.5s
（Wait Time）
Timer function
0.2s
On
Keylock function
Off
Communication mode
0
Test mode, range
AC，2.5kV
Caution
¾
When high limit cutoff current, low limit cutoff current, low limit reference
resistance or test time is changed，you must test once or press STOP key，then
the set value can be stored.
When you turn on power switch ， the instrument will enter ready status
automatically（“READY”lights）. However, the indicator won’t light under the
following situation. E.g.：
（1）In protection status(“PROTECTION”lights）
(a) Turn on the keylock pin of signal input\output connector on the rear panel. At
this situation，clear interlock signal firstly，then press stop key to clear protection
status，then start operation.（more in 6.3.3“interlock function”）。
(b) The test voltage of insulation resistance deflects 30％ range from range
voltage，the protection status will be displayed，and test will be over，press STOP
to clear protection status.
（2） In AC setting，low limit cutoff current is higher than high limit cutoff current,
and low limit pass/fail judge function can’t be turned on.
Under such situation，low limit cutoff current is lower than high limit cutoff
- 10 -
current，or turn off low limit pass/fail judge，then operate the instrument.
（3）In insulation resistance setting，low limit set resistance is higher than high limit set
resistance，and high limit pass/fail judge function is turned on
Under such situation，low limit set resistance is lower than high limit set
resistance，or turn off low limit pass/fail judge，then operate the instrument.
（4）In insulation resistance setting，when range setting is wrong
When the range is 100V，Min. set resistance is 0.2k;
When the range is 500V，Min. set resistance is 1M, if under such range，
READY disappears.
When the range is 1000V，Min. set resistance is 2M, if under such range，
READY disappears.
Under such situation, set to ruled value，READY will appear.
（5）In auto test，in AC，or IR setting，turn off TIMER ON
Turn to AC/IR interface to turn on timer，then to auto test interface，
READY appears.
『2』Start key
Press start key when the instrument is at ready status（“READY”indicator
lights），it will execute testing according to set parameter. If “remote”is displayed，
the start key on the front panel has no function，the start control signal of remote
control connector/output connector has function. If test mode switch of signal
input/output connector on the rear panel is set as instant mode, only press start key
to execute testing，more in 6.6.
Note
¾ Don’t remotely control instrument from remote connector and signal
input/output connector. If you do like that, there will be danger. More in 6.3，
“Remote control”.
『3』Stop key
It is used to stop or reset instrument. Press this key, the instrument has these
functions below：
（1）Clear test status（“TEST”off）
(a) Use highest priority to cut off voltage output.
(d) Turn off“TEST”message.
(c) Set discharge circuit in insulation resistance testing.
(d) If there is no remaining test voltage in output circuit, turn off danger
indicator.
(e) Turn off the test signal flowing into signal input/output connector and high
voltage indicator signal.
(f) In auto test，when there is no remaining test voltage in output circuit,
restore to the setting status in test start.
（2）Clear pass status（“PASS”off）
(a) Turn off ”PASS” message.
- 11 -
(b) Turn off the pass signal flowing into signal input/output connector.
（3）Clear fail status（“FAIL” off）
(a) Turn off“high limit fail”
（“U-FAIL”lights）and“low limit fail”
（“L-FAIL”
lights）message.
(b) Turn off the high limit fail and low limit fail signal flowing into signal
input/output connector.
（4）Clear protection status（“PROTECTION”off）
(a) Turn off protection message.
(b) Turn off protection signal flowing into signal input/output connector.
However, if interlock pin of signal input/output connector is turned on, the
instrument won’t clear protection status. Under such situation, clear interlock
signal（more in 6.3.3，“interlock function”），then press stop key to clear
protection status.
（5）Clear ready status（
“READY”lights）
(a)Turn off“READY”message.
(b)Turn off ready signal flowing into signal input/output connector.
Under common situation，after you untwist stop key，the instrument enters
ready status（“READY”lights）. However，the instrument can’t enter ready
status under such situation.
◎
Protection status can’t be cleared.
◎
Test voltage is still existed.
High voltage indicator still lights after“TEST” signal is off.
◎
When pressing start key，stop key is untwisted.
Note
¾ If the fail hold mode of test mode switch is set，fail status or protection
status can only be cleared by stop key.
¾ More in 6.6，
“special test mode setting”.
『4』Remote connector
The connector can control start/stop function via a remote box or high voltage
test probe. After you connect the jack, the remote controlled circuit is built, and
“REMOTE”message appears，the start key has no function. Under such condition,
after you remove the jack，
“REMOTE”signal disappears，the start key has function.
！
z
z
：
In AC test mode, the test voltage below 4kV, the high voltage probe can be
selected.
Don’t use remote connector or signal input/output connector to remotely control
instrument. If you do so, there will be unpredicted danger, more in 6.3，“Remote
control”.
『5』Test voltage adjusting knob
It is used to adjust test voltage. Turn adjusting knob from counter clockwise
position “0”to clockwise，test voltage becomes larger.
- 12 -
Note
¾
When not in operation，make sure voltage adjusting knob is turned to counter
clockwise position“0”.
¾ In AC mode，the output voltage may be higher due to the wave of AC power.
Make sure operate instrument under low range voltage.
『6』High voltage terminal
Transfer output high voltage between high voltage line and low voltage line（shell
ground）
！
z
：
Don’t touch high voltage output terminal in testing.
『7』Low voltage terminal
It is the low voltage line of output; the terminal is directly connected to the shell.
『8』High voltage indicator
The red indication means the voltage is transferred，it lights only in output back
circuit.
！
：
z When high voltage indicator lights，don’t touch high voltage terminal, probe,
DUT or other electrical device.
『9』Pointer meter
Pointer meter means the amount of output voltage. It can work in both AC and
DC mode.
『10』Null calibration
Make sure power switch is turned off before null calibration.
『11』RANGE
The key is used to select voltage range and selective test mode. In AC setting,
when the key is pressed only，the voltage range can be selected between 2.5KV and
5.0KV；In DC setting, when the key is pressed only，the voltage range can be
switched among 100V,500V,1000V；if you press SHIFT and this key meanwhile，then
switch among AC,IR,AC-IR.IR-AC.
Model
Range and mode
2.5kV AC
TH5101D/TH5101E
5kV AC
100V DC
AC
500V DC
1000V DC
IR
AC-IR
IR-AC
When the instrument is in ready status（“READY” lights），the key has
function；if instrument is in test status（“TEST”lights）or in transfer pass/fail judge
（“PASS”or“FAIL”lights），the key has no function.
- 13 -
Note
¾
Before changing test voltage range or mode，make sure voltage adjusting knob is
in counter clockwise position“0”.
『12』Cutoff current key/set resistance key（▲▼）
These keys are used to increase or decrease cutoff current/set resistance（for 用
reference current/resistance of pass/fail judge）. When the instrument has function
in Ready status（“READY”lights）and“KEYLOCK”disappearing, these keys have
function. if instrument is in test status（“TEST”lights）or in transfer pass/fail judge
（“PASS”or“FAIL”lights），the key has no function, and also in AC-IR,IR-AC.
In insulation resistance, if low limit sets resistance out of ruled range，LOWER
ON will shine，READY disappears，stop testing. As the range below：
When the range is 100V，Min.set resistance is 0.2k;
When the range is 500V，Min.set resistance is 1M, if below the range，LOWER
ON shines，READY disappears
When the range is 1000V，Min.set resistance is 2M, if below the range，
LOWER ON shines，READY disappears
Set resistance value to ruled range ， the status will be disappeared
automatically.
In AC setting，if you press any key alone，use the following resolution to
increase or decrease. If you press SHIFT key meanwhile ， the increasing or
decreasing rate is 10 times than before.
In insulation resistance setting，if you press any key alone，use the following
resolution to increase or decrease. If you press SHIFT key meanwhile ， and
resistance value is below 1M，the increasing or decreasing rate is 10 times than
before；if resistance value is above 1M，the increasing or decreasing rate is 100 times
than before.
If you keep pressing the key，it will increase or decrease automatically.
▲
▼
Increase cutoff current setting/reference resistance setting. The setting
is displayed in current/resistance
Decrease cutoff current setting/reference resistance setting. The setting
is displayed in current/resistance
High limit/Low limit cutoff
Resolution
Displayed format
current range
0.1mA-9.9mA
0.1mA
X.X mA
10mA-110mA /10mA-45mA
1mA
XXX mA
Note：TH5101D sets range to 110mA,TH5101E sets range to 145mA。
High limit/Low limit reference
resistance range
0.2MΩ-9.99MΩ
10.0 MΩ－99.9 MΩ
100 MΩ-999 MΩ
1.00GΩ-9.99 GΩ
10 GΩ-99.9 GΩ
Resolution
Displayed format
0.01MΩ
0.1 MΩ
1 MΩ
0.01 GΩ
0.1 GΩ
X.XX MΩ
XX.X MΩ
XXX MΩ
X.XX GΩ
XX.X GΩ
- 14 -
Note
¾
Because high and low limit cutoff current / reference resistance can be set
without limitation，it is possible that low limit is larger than high limit，and
low limit cutoff current/high limit resistance pass/fail judge function can be
turned on，indicated unit（“mA”/ “MΩ”/“GΩ”）shines and“READY”
message disappears，which means the test condition is not available.
『13』Cutoff current high/low key（UP/LOW）
The key is used to select high limit or low limit cutoff current. If when you
press SHIFT as well as this key，low limit pass/fail judge function can turned on or
off. When the instrument is in ready status（“READY”lights）and“KEYLOCK”
message is turned off，if not in auto test status，the key has no function. When in test
status （“TEST”lights）or in transfer pass/fail judge（when“PASS”or“FAIL”
lights），if in auto test status，the key has no function.
（1）when the key is pressed alone：
When you press the key，high limit or low limit cutoff current is selected，
“ UPPER ” or “ LOWER ” appears. “ UPPER ” means high limit cutoff
current/reference resistance is selected，and the value is displayed in current
readout/resistance readout，you can use ▲▼to adjust value.“LOWER”
means low limit cutoff current/reference resistance is selected，and the value is
displayed in current readout/resistance readout，you can use ▲▼to adjust
value.
（2）when you press SHIFT and UP/LOW：
In AC，
“LOWER ON”disappears or appears，indicating low limit judge
function is valid or invalid；
In insulation resistance，
“UPPER ON” disappears or appears，indicating
low limit judge function is valid or invalid.
『14』Timer（▲▼）
These keys are used to increase or decrease test time. When the instrument is
in ready status（“READY”lights）and“KEYLOCK”message is turned off, When
in test status （“TEST”lights）or in transfer pass/fail judge（when“PASS”or“FAIL”
lights），if in auto test status，the key has no function.
If you press any key alone，it will increase or decrease with the unit shown as
below. If you press SHIFT meanwhile，the increasing or decreasing rate is 10 times
than basic unit. If you keep pressing the key, it will increase or decrease
automatically.
▲
▼
The key is used to set increasing test time. The setting is displayed in
time
The key is used to set decreasing test time. The setting is displayed in
time
Test time setting range
Basic unit
- 15 -
Displayed format
0.2s-99.9s, off
100s-999s, off
0.1s
1s
XX.X s
XXX s
『15』Timer（ON/OFF）
If you press SHIFT as well，（“KEYLOCK”）is turned on or off.
（1）Timer （ON/OFF）is pressed alone：
If timer is turned on，
“TIMER ON”appears，timer indicates the remaining test
time，stop testing when test time is over. If timer function is off，
“TIMER ON”disappears，at the status，timer indicates the passed
time，test can’t be over.
When in ready status（“READY”lights）and“KEYLOCK”is off，Timer
（ON/OFF） has function. When in test status （“TEST”lights）or in transfer
pass/fail judge（when“PASS”or“FAIL”lights），if in auto test status，the key has
no function.
（2）when pressing SHIFT as well as timer（ON/OFF）：
The key is locked and“KEYLOCK”appears，if you press it again，
the key is unlocked，and“KEYLOCK”disappears.
When the lock key is confirmed，the following key is locked.
(a) Cutoff current ▲▼
(b) Cutoff current high limit/low limit（UP/LOW）
(c) Test voltage range/mode（RANGE）
(d) Timer▲▼
(e) Timer（ON/OFF）
Note
¾
If in AC/IR interface，timer is off，
“TIMER ON”disappears，when cutting to
auto test，TIMER ON will shine，and corresponding range indication will shine
as well，READY disappears.
『16』SHIFT
（1）Turn on switch when pressing SHIFT.
Initiated test condition.
（2）Cut off current▲and▼when pressing SHIFT
See the instruction of cutoff current▲and▼.
（3）Press SHIFT and voltage/mode（RANGE）。
Switch among（AC），（IR），AC-IR，IR-AC.
（4）Press SHIFT and high limit/low limit（UP/LOW）。
Low limit pass/fail judge function can be on or off.
（5）Press SHIFT and timer▲ and ▼.
See the instruction of timer▲ and ▼
（6）Press SHIFT and timer（ON/OFF）。
Key lock function can be on or off.
『17』VFD）
VFD displays indicated test condition，result and other items. More in 4.2，
“Displayed item”.
- 16 -
4.2 Instruction
『1』Test voltage range information
Indicate the selectable range for test voltage.
AC，selectable test voltage range is 5kV or 2.5kV.
DC，selectable test voltage range is 0.1kV,0.5kV,1.0kV。
Auto test，display corresponding code（as the table below）.
AC-IR，the front digit displays range code of AC，the back digit displays
range code of IR.
IR-AC，the front digit displays range code of IR, the back digit displays
range code of AC.
Range
Code
2.5kV
0
5kV
1
0.1kV
2
0.5kV
3
1.0kV
4
『2』AC/DC test voltage indicated information
Selectable test voltage is AC or DC.
『3』Voltage display
Voltage display indicates output voltage. It can monitor output voltage lastly.
Range and resolution
Displayed
Range
Resolution
format
5kVAC
0kV-6.5kV
27.77V
X.XX kV
2.5kVAC
0kV-3.25kV
13.88V
X.XX kV
0.1kVDC
XXX V
0.5kVDC
XXX V
1.0kVDC
X.XX kV
『4』Current display /resistance display
In AC, when instrument is in test status（“TEST”lights），current displays test
current；when instrument is not in test status，it displays preset high limit or low
limit cutoff current value.
In insulation resistance，when instrument is in test status（“TEST”lights），
current displays test current；when instrument is not in test status，it displays preset
high limit or low limit reference resistance value.
- 17 -
1. Displayed item
In ready status
In testing
“UPPER”lights
“LOWER”lights
High
limit
cutoff Low
limit
cutoff Tested current/resistance
current/reference
current/reference
resistance
resistance
2. Range
AC test mode
DC test mode
Model
High
limit
cutoff High
limit/low
limit
current/reference resistance reference resistance value
0.20MΩ-99.9GΩ
TH5101D/TH5101E 0.1mA-110mA /0.1mA-45mA
3. Set resolution and displayed format
High limit/low limit cutoff
Resolution
Displayed format
current range
0.1mA-9.9mA
0.1mA
X.X
10mA-110mA /10mA-45mA 1mA
XXX
Note：setting range of TH5101D is up to 110mA,TH5101E is up to 45mA。
High limit/low limit reference Resolution
Displayed format
resistance range
0.2MΩ-9.99MΩ
0.01 MΩ
X.XX MΩ
10.0 MΩ－99.9 MΩ
0.1 MΩ
XX.X MΩ
100 MΩ-999 MΩ
1 MΩ
XXX MΩ
1.00GΩ-9.99 GΩ
0.01 GΩ
X.XX GΩ
10 GΩ-99.9 GΩ
0.1 GΩ
XX.X GΩ
『5』High limit and low limit message
When the instrument is in ready status（“READY”lights）and“KEYLOCK”
disappears，use UP/LOW to switch between high limit and low limit cutoff current.
When in testing（“TEST”lights），
“UPPER”and“LOWER”disappears，the amp
meter displays the test current.
『6』Low /high limit open message
When this function is on，the message displays“LOWER ON”
（“UPPER ON”）
lights；when off，the message disappears，“LOWER ON”(“UPPER ON”) off.
When the instrument is in ready status（“READY”lights）and“KEYLOCK”
disappears，press SHIFT and UP/LOW to turn on or off the function. In AC test,
turn on/off low limit judge function；in insulation resistance test，turn on/off high
limit judge function.
『7』Timer
When the instrument is in test status，time display indicates the remaining or
passed test time. When the instrument is in ready status（“READY”lights）and
“KEYLOCK”disappears，use ▲▼ to increase or decrease the preset time. If you
press SHIFT and▲or▼，increasing/decreasing rate is 10 times than before.
If timer function is on（“TIMER ON”lights），the displayed time will decrease
as the test time passed，and the test is over when preset time passed. If timer
function is off（“TIMER ON”off），displayed time starts from zero，and increase
as the time passed，test won’t be over when preset time passed. The preset setting
- 18 -
time can be set under the situation below：AC mode；insulation resistance mode；
in auto test mode，set waiting time.
1. Displayed time
Testing
Ready
“TIMER ON”appears
“TIMER ON”disappears
Display
preset
Remaining time
Passed time
time
2. Set range，resolution，and displayed format
Set range
Resolution
Displayed format
0.2s-99.9s or off
0.1s
XX.X
100s-999s or off
1s
XXX
『8』Timer open message
When the instrument is in ready status（“READY”lights）and“KEYLOCK”
disappears，use on/off to turn on or off timer function.
If in AC or insulation resistance，turn off some timer to auto test mode，
“TIMER ON”shines，READY disappears，stop testing.
『9』Ready message（“READY”lights）
It shows the instrument is ready for testing. When the message is displayed, press
START，the instrument will work according to the parameter displayed on displayed
board.
『10』Test message
It shows the instrument is in testing. Press STOP key to clear the status.
『11』Pass message
When pass/fail judge is passed，the message appears. If timer function is off or
test is cancelled，there will be no pass message. Under common situation，it lasts for
0.2s. if the mode you set is pass hold mode，the message is held, press STOP to reset
instrument from pass hold status.
『12』Fail message
High limit fail message：when the result of high limit pass/fail judge is fail，the
message（yellow）appears，it shows the current/insulation resistance flowing
through DUT is larger than preset high limit cutoff current/high limit reference
resistance value. Press STOP to reset instrument.
Low limit fail message：when the result of low limit pass/fail judge is fail，the message
（yellow）appears，it shows the current/insulation resistance flowing through DUT
is smaller than preset high limit cutoff current/high limit reference resistance value.
Press STOP to reset instrument.
。
『13』Protection message
The instrument enters protection status, the message (yellow) appears, and
output voltage is cut off for any accidence below. In order to clear protection status,
firstly find out the reason, and then press STOP.
1. Interlock signal inputting pin of signal input/output connector is on
- 19 -
2. Test mode or range switch is error.
3. In insulation resistance test，after waiting judge time is passed, test voltage
deflects 30％ to range voltage.
4. Remote control function is valid or invalid，there is protection，press STOP to
clear the protection.
『14』Keylock message
When the keylock function is on，the message appears；when the function is off，
the message disappears. Keylock function can make the keys below unavailable：
(a)cutoff current ▲▼key
(b)cutoff current high limit/low limit key（UP/LOW）
(c)Test voltage range/mode key（RANGE）
(d)Timer▲▼key
(e)Timer（ON/OFF）key
Press SHIFT as well as ON/OFF key，turn on or off keylock function at anytime.
『15』Remote control message
It shows instrument is remotely controlled by remote control connector or
signal input or output connector. When receiving remote command from RS-232C
interface，it also appears. When the message appears，start key on the panel has no
function. More in 6.3，“Remote control”.
4.3 Instruction of rear panel
『1』Protection ground
For connecting instrument to ground safely. More in 2.6，
“ground”.
『2』AC power connection
Power line connector for AC power input.
『3』Signal input/output connector
The connector is 25-core cable for output and test mode of interlock signal,
remote signal, and status output signal. More in 6.3.3 “Interlock function”，6.3.2
“signal input /output remote control”
，more in 6.6 节，“special setting mode”.
『4』RS-232C connector
The connector is used to connect a RS-232C cable. The test result is output to PC
or printer via RS-232C.
- 20 -
Chapter 5 Preparation before testing
5.1 Initiated setting
Table 5.1shows default value of setting data.
Item
Initiated setting value
High limit cutoff current
0.2mA
Low limit cutoff current
Low limit reference resistance
High limit reference resistance
0.1mA
2.00MΩ
3.00 MΩ
Low limit pass/fail judge（AC） Off
High limit pass/fail judge（IR） Off
Test time(AC)
0.5s
Test time(IR)
0.5s
（Wait Time）
0.2s
Timer function
On
Key lock function
Off
Communication
0
Mode, range
AC，2.5kV
Adopt the following steps to restore setting value to default value.
1. Turn on power switch and press“SHIFT”meanwhile. VFD displayer starts to
lighting, the displayed power has been turned on.
2. Loose“SHIFT”and power key
After several seconds，VFD displays edition number，model，communication
mode. If nothing displays on VFD，execute step again.
5.2 Check
1. Be sure power switch is off.
2. If the voltage adjusting knob on the front panel is in the counter clockwise zero
position.
3. Check if the 25 core cable jack has been connected to the signal input/output
terminal on the rear panel.
4. Check if power line has been connected correctly.
5. When turning on power switch，press“SHIFT”. After several seconds, VFD
displays edition number，model and alternation mode.
6. Check if protection status is valid under the situation of keylock.
7. Turn off power.
8. Turn on power，check if the instrument is in ready status（“READY”lights）.
- 21 -
5.3 Check the instrument before testing
1. Calibration of anolog voltage meter
Before turning on power, check if the analog voltage meter is in position “0”.
If not, adjust to position“0”in null adjuster. If you do the adjustment when the
power is on, please turn off power firstly.
2. Interlock function
Before testing, make sure there is a suitable interlock function is test system.
3. Not in protection status
If instrument is in protection status，even you press start key，the instrument
won’t start testing and transfer voltage. Clear out the reason causing protection
status，then press stop key.
The reason is shown below：
① Interlock input signal pin of signal input/output connector is on.
② Test mode or range switch is error.
③ Test voltage of insulation resistance deflects 30％
- 22 -
to range voltage.
Chapter 6 Test procedure
6.1 AC withstanding voltage test
Available parameter range：
Test
Standard of high
voltage
limit cutoff current
0.1mA-110mA
0kV-5kV
/0.1mA-45mA
Standard of low limit
cutoff current
0.1mA-110mA or off
/0.1mA-45mA or off
Test time
0.2s-999s or off
6.1.1 Select an AC range
Press “RANGE”，select a AC voltage range（2.5kV or 5kV）. The information
of AC testing mode appears，the voltage range information indicates the range you
select.
Note
¾
¾
Switch voltage range ， make sure voltage adjusting knob is in counter
clockwise position“0”.
In testing, “RANGE”is invalid.
6.1.2 Set high limit cutoff current
If the current flowing through DUT is over the value，DUT is judged as fail.
Procedure：
① Use“UP/LOW”to select high limit cutoff current setting mode.“UPPER”
appears，the saved high limit current is displayed by current displaying
window.
② Use ▲ and ▼ to adjust the high limit cutoff current value, if you press
“SHIFT”meanwhile，the adjusting speed will be increased with base
number of 10 times.
High limit cutoff setting range：0.1mA-110mA/45mA (TH5101D/TH5101E)。
Resolution and displayed format
High limit cutoff setting range
Resolution
Displayed format
0.1mA-9.9mA
0.1mA
X. XmA
10mA-110mA /10mA-45mA
1mA
XXXmA
Note
¾
When the instrument is in ready status （“ READY ” displays ） and
“KEYLOCK”signal is off，the key has function. When the instrument is in
test status（“TEST”displays）or transferring pass/fail judge result（“PASS”
or“FAIL”appears），the key has no function.
6.1.3 Set low limit cutoff current
If the current flowing through DUT is below the value，DUT is judged as fail.
You can distinguish the DUT with small current to improve the reliability. You
can turn off this mode for convenient use.
Procedure：
1. Use UP/LOW to select low limit cutoff current mode.“LOWER”appears，
the saved low limit current is displayed by current displaying window.
2. Use ▲ and ▼ to adjust the low limit cutoff current value. if you press
- 23 -
“SHIFT”meanwhile，the adjusting speed will be increased with base
number of 10 times.
3. When you press“SHIFT”and“UP/LOW”，low limit pass/fail judge function
can be valid and“LOWER ON”appears.
Low limit cutoff current setting rang ： 0.1mA-110mA/45mA or off
(TH5101D/TH5101E)
Resolution and displayed mode：
Low limit cutoff current range
Resolution
Displayed mode
0.1mA－9.9mA
0.1mA
X. XmA
10mA－110mA /10mA-45mA
1mA
XXXmA
Note
¾
When instrument is in ready status（“READY”displays）and“KEYLOCK”
signal is off，the key has function. When instrument is in test status（“TEST”
displays）or transferring pass/fail judge result（“PASS”or“FAIL”appears），
the key has no function.
¾ Because high/low limit cutoff current can be set independently，the latter
setting can be higher than former，now if low limit cutoff current judge
function is on，“mA”shines，“READY”disappears，indicating the test
condition is not allowed.
6.1.4 Set test time
When there is no any fail judge，as time pass by，the test will be over. You can
turn off timer function if you don’t need it.
Note
¾
Test and stop time is limited by setting high limit cutoff current. “ON
30min”on the front panel displays an Max.test time，
“OFF 30min”displays
a shortest stop time. More in 9.1.
Procedure：
1．Use ▲ and ▼ to adjust the low limit cutoff current value. if you press “SHIFT”
meanwhile，the adjusting speed will be increased with base number of 10 times.
2. Turn on（off）time function，press“ON/OFF”key.
Resolution and displayed format
Test time
Resolution
Displayed format
0.2s-99.9s,off
0.1s
XX.X
100s-999s,off
1s
XXX
Note
¾
When the instrument is in ready status （“ READY ” displays ） and
“KEYLOCK” signal is off，ON/OFF has function. When in TEST-ON
status（“TEST”displays）and transferring pass/fail judge result，they have
no function.
6.1.5 Set test voltage
The procedure is used to set test voltage for DUT
Note
¾
The instrument must use a stable AC power for stable test voltage. In AC
- 24 -
withstanding voltage，seen from inner circuit structure, output voltage is
affected by the wave of AC power.
Set procedure：
1. Press“SHIFT”and UP/LOW to turn off low limit pass/fail judge function.
“LOWER ON”will disappear.
2. Press ON/OFF to turn off timer function.“TIMER ON”will disappear.
3. Check if the voltage adjusting knob is in position“0”
（counter clockwise）and
in ready status（“READY”displays, start to press.
4. Readout the actual output voltage in analog voltage meter or digital voltage
meter，adjust voltage adjusting knob in clockwise way to output required
voltage value.
5. Press stop key to turn off output voltage.
6. Press ON/OFF to turn on timer function.“TIMER ON”will display.
7. If you need low terminal pass/fail function，press“SHIFT”and UP/LOW key,
“LOWER ON”displays.
6.1.6 Connection of DUT
Procedure：
1. Make sure analog voltage meter is in position“0”，high voltage indicator is off，
“READY”appears.
2. Connect low voltage test line to low voltage ground terminal，connect high
voltage test line to high voltage ground terminal.
3. Short low voltage test line and high voltage test line for releasing high voltage.
4. Connect low voltage test line to DUT, and high voltage test line to DUT.
6.1.7 Test
The test condition：
Test voltage range
2.5kVAC
Test voltage
1.2kV
High limit cutoff range
10mA
Low limit pass/fail judge OFF
function
Test time
1s
Note
¾ Set test voltage by actual output voltage. See in 6.1.5，“Set test voltage”.
Procedure
1. when instrument is in“READY” status（“READY”appears）
，press start
key to set testing.
◆ Danger indicator lights.
◆ HV-ON and TEST signal of input/output connector is on.
◆ “TEST”signal displays.
◆ Test voltage is transferred between high voltage and low voltage test
terminal.
◆ Analog voltage meter indicates test voltage.
◆ Digital voltage meter indicates test voltage.
◆ Digital current meter displays tested current.
◆ Time displays the remaining time or passed test time.
- 25 -
Note
¾ If in protection status, the instrument won’t start testing.
¾ If a stop signal is applied, the instrument won’t start testing.
2. If test result is pass，and preset test time is passed，the instrument will give a
pass result, the following action will happen：
◆ End testing and cut off test voltage.
◆ “TEST”signal disappears, TEST signal of input/output connector is off.
◆ Danger indicator is off， HV-ON signal of input/output connector is off.
◆ “ PASS ” is displayed ， beeper alarms ， PASS signal of input/output
connector is off.
3.
In common status，PASS lasts for 0.2s, then instrument will reset to READY
status automatically（READY displays）.
◆ “PASS”disappears，beeper stops alarming.
◆ PASS signal of input/output connector is off.
Note
¾
The instrument won’t reset to READY status under the circumstance below
— The test mode on the rear panel is set as pass hold mode，under this
situation, pass status is held lastly. If reset it，press STOP key
— Protection status is existed
— Stop key is pressed（including that in remote control box）.
— When start key is pressed（including that in remote control box）.
4. If timer is off，“TIMER ON”won’t disappear，the test won’t be stopped
automatically. Press stop key to stop testing manually. Under this situation,
instrument won’t make pass judgment，and the following actions will happen：
◆ End testing and cut off test voltage.
◆ “TEST”signal disappears, TEST signal of input/output connector is off
◆ Danger indicator is off， HV-ON signal of input/output connector is off.
5. If test result is fail.
If in the process of testing, leakage current is over the limitation below, the
instrument will make a fail judgment, cut off test voltage and end testing.
（A） When test current is larger than high limit cutoff current：
“UPPER FAIL”
appears.
（B）When test current is lower than high limit cutoff current：“LOWER FAIL”
appears.
When test result is fail：
◆ End testing and cut off test voltage.
◆ “TEST”signal disappears, TEST signal of input/output connector is off
◆ Danger indicator is off， HV-ON signal of input/output connector is off.
◆ “UPPER FAIL” or“LOWER FAIL”displays.
◆ U _FAIL and L _FAIL signal of input/output connector is on, beeper alarms.
6.1.8 Repeat testing
PASS lasts for 0.2s, then instrument will reset to READY status automatically，
you are allowed to press start key to repeat testing. The application is the same in
remote control.
- 26 -
Note
¾
The instrument won’t reset to READY status under the circumstance below
— The test mode on the rear panel is set as pass hold mode，under this
situation, pass status is held lastly. If reset it，press STOP key
— Protection status is existed
— Stop key is pressed（including that in remote control box）.
— When start key is pressed（including that in remote control box）.
6.2 Insulation resistance test：
Test DUT according to the required parameter. The range of
as below：
Test
High limit reference Low limit reference
voltage
resistance standard
resistance standard
0.2MΩ－800MΩ
0.2MΩ－1.0GΩ
100V
1.0MΩ－4.0GΩ
1.0MΩ－5.0GΩ
500V
2.0MΩ－10GΩ
2.0MΩ－10GΩ
1000V
parameter is shown
Test time
0.2s-999s or off
0.2s-999s or off
0.2s-999s or off
6.2.1 Select a DC test voltage range
Use test voltage range switch key （ RANGE ） to select IR test range
（0.1kV,0.5kV,1.0kV），IR mode will appear，test voltage range will indicate the range
you select.
6.2.2 Set low limit reference resistance
Low limit reference resistance setting range：0.2 MΩ－99.9 GΩ。
Resolution and displayed format：
High/low limit reference Resolution
resistance range
0.2MΩ-9.99MΩ
0.01MΩ
10.0 MΩ－99.9 MΩ
0.1 MΩ
100 MΩ-999 MΩ
1 MΩ
1.00GΩ-9.99 GΩ
0.01 GΩ
10 GΩ-99.9 GΩ
0.1 GΩ
Displayed format
X.XXMΩ
XX.X MΩ
XXX MΩ
X.XX GΩ
XX.X GΩ
In insulation resistance，if you set resistance value out of ruled range，LOWER
ON will shine，READY disappears，forbidden starting testing. The setting range
below：
- 27 -
When the range is 100V，Min.setting resistance is 0.2k;
When the range is 500V，Min.setting resistance is 1M, if below this range，
LOWER ON will shine，READY disappear.
When the range is 1000V，Min.setting resistance is 2M, if over this range，
LOWER ON will shine，READY disappear.
6.2.3 Set high limit reference resistance
High limit reference resistance setting range：0.2 MΩ－99.9 GΩ or off
Resolution and displayed format：
Same as the table below.
6.2.4 Set test time
Set test time of test status，in 6.1.4
6.2.5 Connection of DUT
Setting procedure in 6.1.6。
6.2.6 Test
Test condition：
Test voltage range
Low
limit
reference
resistance setting
High limit pass/fail judge
function
Test time
500V
10MΩ
OFF
5s
6.2.7 Repeat testing
In 6.1.8
6.3 Auto switch test of withstanding voltage to insulation
AC withstanding voltage
insulation resistance test. Press SHIFT+RANGE to
enter this testing，the status after IR.
- 28 -
6.3.1
Instruction of entering range
After entering this test，enter AC Ready status（range is displayed with code；preset
time is not the AC preset time，but the waiting time of withstanding voltage to insulation
resistance）.
Note：range is displayed with code，more in 4.2.AC-IR, the former displays AC
range code，the latter displays IR range code.
Range
2.5kV
5kV
0.1kV
0.5kV
1.0kV
Code
0
1
2
3
4
E.g.：RANGE 02
indicate the test of AC to IR
Range of withstanding voltage：
2.5kV。
Range of IR：0.1kV。
6.3.2
Setting of AC-IR parameter
After AC-IR，each parameter can’t be set. If set，press SHIFT+RANGE to back to
single AC，or single insulation resistance setting. After setting，enter AC-IR to perform test.
Note
¾
Now，key has no function（except SHIFT+RANGE, SHIFT+TIMER ON）
6.3.3
Setting of wait time of AC-IR
Default value：0.2s. Test range：0.2s-999s. Press timer ▲and▼ to modify the middle
waiting time. In 6.1.4. Note：now，TIMER ON/OFF of timer is invalid，has no function.
Note
◇ Wait time，the wait time of AC-IR and IR-AC is the same.
6.3.4
Test procedure
① In AC，actual current is displayed，and timer displays the remaining time of AC
test，pass/fail judge，same as single AC part.
② When AC test ends, in middle wait time，voltage is off， current part is displayed
in black，HV ON indicator lights，TEST lights.
③ To IR, actual resistance is displayed，and timer displays the remaining time of IR
test，pass/fail judge，same as single IR part.
④ Test ends，instrument resets to the start status.
6.3.5 Test
Test condition：
Voltage range
2.5kV
- 29 -
Voltage
1.0kV
High limit cutoff 10mA
AC current
Low limit pass/fail OFF
judge function
Test time
5.0s
2.0s
（WaitTime）
Voltage range
0.5kV
Low limit reference 100MΩ
IR
resistance value
High
limit 10.0GΩ
reference resistance
value
High limit pass/fail ON
judge function
Test time
10s
Note：Turn on timer in AC and IR！
Note
¾
In AC，use actual output voltage to set test voltage. In 6.1.5，
“Set test
voltage”.
Test procedure
When in“READY”status（“READY”appears）
，press start to set up test.
◆ Danger indicator lights.
◆ HV-ON and TEST signal of input/output connector is on.
◆ “TEST”signal displays.
◆ Test voltage is transferred between high voltage and low voltage test
terminal.
◆ Analog voltage meter indicates test voltage.
◆ Digital voltage meter displays test voltage.
◆ Digital current meter displays the tested current.
◆ Time displays the remaining or passed test time.
Note
¾
¾
If instrument is in protection status，the instrument won’t start testing.
If a stop signal is applied，the instrument won’t start testing.
If leakage current is over the limitation below，the instrument will give a fail
judge and cutoff test voltage and end testing.
（A） Test current ＞high limit cutoff current：“UPPER FAIL”will appear.
（B）Test current ＜high limit cutoff current：： “LOWER FAIL” will appear.
Test result is fail：
◆ Test ends and cut off voltage.
◆ “TEST”disappears, TEST signal of input/output connector is off.
◆ Danger indicator is off. HV-ON signal of input/output connector is off.
◆ “UPPER FAIL” or“LOWER FAIL”is displayed.
◆ U _FAIL and L _FAIL signal of input/output connector is on，beeper alarms.
- 30 -
Preset time is passed，no fail judge，enter middle wait time. Now：
◆ Cut off test voltage，voltage displays as 0.00kV.
◆ Current display is black, indicating in middle wait time status，time displays
remaining wait time.
After wait time is passed，turn to insulation resistance test，and set up test.
◆ Test voltage is transferred between high voltage and low voltage test
terminal.
◆ Digital voltage meter displays test voltage.
◆ Digital current meter displays the tested current.
◆ Digital ohm meter displays tested resistance.
◆ Time displays the remaining or passed test time.
If test result is pass，preset test time is passed，the instrument will give a pass judge.
If test result is pass：
◆ Test ends and cut off voltage.
◆ “TEST”disappears, TEST signal of input/output connector is off.
◆ Danger indicator is off. HV-ON signal of input/output connector is off.
◆ “ PASS ” is displayed ， beeper alarms ， PASS signal of input/output
connector is on.
Under common status，PASS lasts for 0.2, then the instrument will reset to READY
status automatically（READY is displayed），
◆ “PASS”disappears，beeper stops alarming.
◆ PASS signal of input/output connector is off.
Note
¾
Instrument will reset to READY status
— Test mode on the rear panel is pass hold mode，and pass status will be
held constantly. If you reset it，press STOP key.
— Protection status is existed
— Stop key is pressed（including that in remote control box）.
— When start key is pressed（including that in remote control box）.
If test result is fail.
If insulation resistance is over the limitation below，the instrument will give a
fail judge and cutoff test voltage and end testing.。
（A）Test resistance＜high limit cutoff resistance：
“LOWER FAIL” will appear.
（B）Test resistance＞high limit cutoff resistance：“UPPER FAIL” will appear.
If test result is fail.
◆ Test ends and cut off voltage.
◆ “TEST”disappears, TEST signal of input/output connector is off.
◆ Danger indicator is off. HV-ON signal of input/output connector is off.
◆ “UPPER FAIL” or “LOWER FAIL”is displayed.
◆ U _FAIL and L _FAIL signal of input/output connector is on，beeper alarms.
- 31 -
Note
◇ In testing，press STOP key，then the instrument will reset to test start.
6.3.6 Repeat testing
In 6.1.8。
6.4
Auto switch test of insulation resistance to withstanding voltage
AC withstanding voltage
insulation resistance test. Press SHIFT+RANGE to
enter this testing，the status after AC-IR.
6.4.1
Instruction of entering range
After entering this test，enter IR Ready status（range is displayed with code；preset
time is not the AC preset time，but the waiting time of withstanding voltage to insulation
resistance）.
Note：range is displayed with code，more in 4.2.AC-IR, the former displays IR range
code，the latter displays AC range code.
Range
2.5kV
5kV
0.1kV
0.5kV
1.0kV
Code
0
1
2
3
4
E.g.：RANGE 20
indicate the test of IR to AC
Range of withstanding voltage：
2.5kV
Range of IR：0.1kV
6.4.2
Setting of IR-AC parameter
Note
◇ If the parameter is not set correctly in single test mode，when entering
IR-AC，IR is error， IR shines in corresponding range .AC only shines in
corresponding range.
Quit，enter single test mode，after each parameter is set correctly, enter
IR-AC mode again.
6.4.3
Setting of wait time of IR - AC
Default value：0.2s. Test range：0.2s-999s. Press timer▲ and ▼to modify middle
wait time in 6.1.4。
Note：now，TIMER ON/OFFof timer is invalid，has no function.
Note
◇ Wait time，the wait time of AC-IR and IR-AC is the same.
6.4.4 Test procedure
See in 6.3.4 AC-IR
6.4.5 Test
- 32 -
See in 6.3.4
AC-IR
6.4.6 Repeat testing
See the requirement in 6.1.8
6.5 Remote control
！
：
z
Be careful to operate the instrument in remote control mode，because dangerous
high voltage is controlled by remote control switch.
6.5.1Remote control by connector
a. Procedure：
1. Turn off power
2. Use a specified cable（5 core）to connect remote control to selected device.
3. Turn on power. “REMOTE”is displayed，the start key from selective device
is valid，but the one on the front panel has no function. However，you can stop
the voltage by the stop key on the panel and selective device.
b. Restore panel operation：
1. Turn off power.
2. Remove the specified cable of remote connector on the front panel（5 core）.
3. Turn on power. “REMOTE”disappears and start switch on the panel has
function.
Note
¾
¾
Don’t use remote control connector and signal input/output connector to
remotely control instrument.
If test mode is set as fail hold mode，fail and protection status can’t be reset
by applying a remote stop signal. They should use stop key to reset partly.
6.5.2 Pass signal input/output connector remote control
Signal input/output connector has 3 functions below，providing 25-core cable
connector.
(1)Test mode setting（1，2，3，4，5）
。
(2)External device remote control（13，20，22，23，24，25）
。
(3)Output status（6，7，8，9，10，11，12，15，16，17，18，19）。
Table 6-1 Instruction of signal input/output
Item
Specification
High level input voltage
7V-15V
Input
Low level input voltage
0V-1V
signal
Input time width
No less than 5ms
High level output voltage
11V-15V
Output
Low level out put voltage
0V-1V
signal
High level Max. output current
5 mA/channel
Figure 6-1 Pin arrangement of signal input/output connector
- 33 -
Table 6-2 Pin arrangement of signal input/output connector
Pin
No.
Status Output condition and signal description
1
VCC1
+5V
DOUBLE-ACTI
2
Dual effect mode
ON
Input
3
PASS-HOLD
Pass hold mode
4
MOMENTARY
Instant test mode
5
FAIL-MODE
Fail hold mode
6
HV-ON
7
TEST
8
PASS
9
U-FAIL
10
L-FAIL
11
READY
12
PROTECTION
15,16,17
18，19
VCC2
COM
Output
13
INTERLOCK
20
COM
22
STOP
23
START
24
ENABLE
25
VCC2
Input
Output
Turn on when in testing or there is high
voltage in output terminal（high level is
valid）
Turn on during testing（high level is
valid）
Turn on for 0.2s in pass；and constantly
in pass hold（high level is valid）
Turn on when high limit fail produces
（high level is valid）
Turn on when low limit fail produces
（high level is valid）
Turn on in ready（high level is valid）
Turn on when protection function is
available（high level is valid）
Power（+15V）
Common ground of circuit
Interlock signal input terminal （ high
level is valid）
Common ground of circuit
Stop signal input terminal（high level is
valid）
Start signal input terminal（high level is
valid）
Enable signal input terminal（high level
is valid）
Power （+15V）
6.5.3 Interlock function
When interlock function is on ， instrument enters protection status
（“PROTECTION”appears）. Now，instrument cuts off test voltage，which can’t
neither respond the start signal from start key or remote control connector，nor stop
- 34 -
signal from stop key or remote control connector.
Interlock function：pin 13 and 25 of signal input/output connector is the input
terminal of interlock signal. When pin 13 and 25 is off, interlock function has
function；when pin 13 and 25 is shortly connected, function releases.
！
：
If you turn on the power, interlock function will activated, the instrument won’t
work. A 25 core cable jack is provided as accessory.
When instrument is installed by actual ground，use interlock function as possible，
Provide a safe working environment. The method is as below：
①Provide case for DUT to prevent electrical shock.
②Open case，cut off output.
6.5.4 Start/stop control
Pin 22，23，24 of signal input/output connector is used for remote control
start/stop.
Procedure：
a) Short pin 24（ENABLE）to pin 20（COM），pin 24 is low level. The start key is
invalid. Use stop key of pin 22（STOP）to stop testing.
b) When pin 11（READY signal）is open，short pin 23 to pin 20 to set pin 23 as low
level.
c) Short pin 22 to pin 20 to set stop signal（STOP），instrument stops testing.
d) Set remote enable signal as high level for unlocking control. “REMOTE”
disappears，start key has function，start signal of input/output connector has no
function.
Start/stop reference circuit：when using relay and switch to connect instrument，you
can adopt transistor, field effect transistor，coupling to replace
or drive these contact device.
6.5.5 Output signal
The status can be output from pin 6 to 12 of 25-core input/output connector.
The Max.output current of high level is 5 mA/channel，please attention in designing
driving circuit.
6.6 Special mode setting
Set 4 test modes by pin 1，2，3，4，5 of 25-core input/output connector. You can
choose 2 kinds or more groups. When the power is on, instrument reads open setting.
- 35 -
When you change setting, turn off power switch and then turn on power again.
6.6.1 Dual effect mode
Short pin 2 to pin 1 to set dual effect mode，only after you release stop key for
0.5s, the operation can be performed. Or operation can’t be available. Although this
procedure is complicated, it improves the testing safety. The function can be available
in remote control.
6.6.2 Pass hold mode
Short pin 3 to pin 1 to set pass hold mode，don’t reset start status after 0.2s of
pass judge. Press stop key or apply stop signal of remote control circuit to reset ready
status.
6.6.3 Instant test mode
Short pin 4 to pin 1 to set instant test mode. Only when pressing the start key,
the test starts，loose start key, test ends. By doing so, it improves the testing safety.
The function can be available in remote control.
6.6.4 Fail pass mode
Short pin 5 to pin 1 set fail hold mode，for stop signal from remote control
circuit, the instrument can’t reset to fail pass judge or protection status. If reset the
instrument, you should press the stop key on the panel.
- 36 -
Chapter 7 RS-232C interface
7.1 Connection cable
a) Turn off power of instrument and DUT.
b) Connect a crossed RS-232C cable to 9-core RS-232C connector.
7.2 RS-232C specification
Table 7-1：RS-232C specification
Item
Specification
On-off sync，half dual
Transfer rule
Transfer rate
9600bps
Data length
8 digit
Odd and even
None
Stop
1
Intonation
None
Send：CR+LF
Separated character
Receive：CR,LF, CR+LF
Note
¾
When turning on the instrument，some characters of bite can be sent. After
power being on, turn on the power of PC or printer.
7.3 Communication method
Use signal from PC and respond to perform communication. After a command, a
responding is back. Command can’t be sent constantly. Confirm responding before
next order.
7.4 Communication mode
- 37 -
4 communication modes of RS-232C
Table 7-2 communication mode
Mode
Description
Only respond the mode from PC command（default intensity
0
setting）
Auto responding mode of test starts and ends. Back to instrument status
1
Test starts
<START>
Test ends
<PROTECT>,<PASS>,<U_FAIL>,<L_FAIL>,<STOP>
Auto responding mode of test starts and ends. Back to instrument status，
set, and test value.
(AC) high limit cutoff current，
（low limit cutoff current
◎1），
（preset test time◎2），<START>,AC，
（Wait time◎3）。
(IR) low limit reference resistance，
（high limit reference
resistance◎1），（preset test time◎2）
，<START>,IR
(AC-IR) high limit cutoff current，（low limit cutoff
current◎1）
，
（preset test time◎2），AC，wait time
Test starts
Low limit reference resistance，（ high limit
reference resistance◎1）
，
2
（preset IR test time◎2）
，<START>,IR
(IR-AC) low limit reference resistance ，（ high limit
reference resistance◎1）
，
（preset IR test time◎2），IR，
wait time
high limit cutoff current，（low limit cutoff
current◎1）
，
（preset AC test time◎2）
，<START>，AC，
Max. test voltage，Max. test current/Min.test resistance，
current test time ， and responding of test ends in
Test ends
communication mode 1.
In AC-IR/IR-AC，display the first test result，and latter
one on the next line.
Operation is the same as mode 2，except a LF character is added when
3
test ends.
◎1 when low limit pass/fail judge has function（“LOWER ON”lights），low limit cutoff
current is back.
◎2 when timer function has function（
“TIMER ON”lights），preset test time is back.
The process of PC in communication mode1-3 is decreased，because the command
from PC doesn’t need sending. Otherwise，connect a printer to instrument，these
modes allow test to be printed.
Example：
Talk-model-1
Talk-model-2
Talk-model-3
<START>
08.0mA,2.5S<START>AC
08.0mA,2.5S<START>AC
<PASS>
930V,0.3mA,2.5S<PASS>
930V,0.3mA,2.5S<PASS>
<START>
100MΩ,15S<START>IR
- 38 -
<L_FAIL>
<START>
<PASS>
<START>
<PASS>
500V,50MΩ,10S<L_FAIL>
100MΩ,15S<START>IR
08.0mA,2.5S<START>AC WaitTime0.2s 500V,50MΩ,10S<L_FAIL>
100MΩ,15S<START>IR
930V,0.3mA,2.5S
08.0mA,2.5S,AC WaitTime0.2s
500V,50MΩ,10S<L_FAIL>
100MΩ,15S<START>IR
930V,0.3mA,2.5S
500V,50MΩ,10S<L_FAIL>
Set communication mode
Procedure：
1. Check if power switch is off.
2. Turn on power according to the required communication mode, and the indicated
key in table 7-3.
Table 7-3 setting key
Communication Power+key on front panel
mode
0
Power+timer on/off
1
Power+cutoff current▼
2
Power+cutoff current▲
3
Power+cutoff current▼and ▲
VFD displayer starts lighting.
3. Loose key and switch
After several seconds，VFD displayer will display edition number，mode and
communication mode. If there is no display, execute the procedure from start.
4. Check if the appointed communication mode in step 2 has been displayed.
7.5 Notes before using RS-232C
(1)when instrument is set as special setting：
○ When the switch of signal input/output connector is set as dual effect mode，
even a start command is sent, test won’t start. Turn off dual effect test
mode.
(2)release protection status：
○ protection status is not released in stop command ， check the brief
description of released protection status.
(3)operation and remote control message：
○ Table 7-4 indicates enable control source for each group of remote control
source.
○ Commonly，when starting instrument by RS-232C，as Table 7-4 “d”
，the
sending condition of remote command.
Table 7-4
Remote control source
G
r Remote Input/output
RS-232C
o
connec connector on
u
tor on therear panel
p
front
(enable signal
- 39 -
Start function
Panel
Control
Enable remote
source
Display
remote
info
panelre
remote
connec
tor on
front
panel
is in low level）
a
b
Can
Can’t
◎
c
d
e
◎
◎
f
g
h
Can’t
◎
◎
◎
Can’t
◎
◎
◎
Can’t
◎
Can’t
◎
Can’t
◎
Can’t
Off
Remote connector
has function
Input/output
control
has function
RS-232C
has function
Remote，
or
Input/output
control
has function
Input/output
control
has function
Remote connector
has function
Remote，
or
Input/output
control
has function
On
On
On
On
On
On
On
7.6 RS-232C command and responding
● Command error responding：ERROR。
● The command in parentheses is the abbreviated format.
*IDN?
Query the format name and ROM edition number.
E.g.: TH5101D back:
“TONGHUI（CHANGZHOU）ELECTRONIC CO.，LTD，TH5101D，1.02”
*RST
Communication mode is set as default value（0）。
Back：OK。
STATUS?(STAT?)
Query the status.
Respond the following：
- 40 -
PROTECTION，TEST，READY，PASS，U_FAIL，L_FAIL，ELSE
（ELSE indicates a status differing from PROTECTION,TEST,READY,PASS,U_FAIL,or
L_FAIL）
MODE?
Query timer setting，low limit cutoff current setting，voltage mode，and voltage
range.
E.g.：in AC，responding: TIMERON,LOWERON,VOLTAC,RANGE2.5
In IR，responding：TIMERON,UPPEROFF,VOLTIR,RANGE 500
In AC-IR，responding：TIMERON,LOWERON,VOLTAC,RANGE2.5
TIMERON,UPPEROFF,VOLTIR,RANGE 500
In IR-AC，responding：TIMERON,UPPEROFF,VOLTIR,RANGE 500
TIMERON,LOWERON,VOLTAC,RANGE2.5
MEASURE?(MEAS?)
Query the test value.
Responding back：
 In testing
Return to test voltage，test current and actual test time.
Â
Â
Wait time of auto test
Return to test mode（AC/IR），test voltage，remaining wait time
No testing
Return to the former test result according：
Return to Max.test current，current/Min. test resistance，actual test time
and status. Status includes：
<PROTECT>,<PASS>,<U_FAIL>,<L_FAIL>,<STOP>,<P_ON>
（<P_ON>：after power is on, respond MEASURE? instantly）.
TMODE(TMOD)
Set communication mode.
e.g.：TMOD 0——Set communication mode 0.
TMOD 1——Set communication mode 1.
TMOD 2——Set communication mode 2.
Responding，back：OK。
TMODE? (TMOD?)
Query mode setting.
Query：
TMODE0，TMODE1，TMODE2，TMODE3
REMOTE
Use START to be useful by RS-232C.“REMOTE”message is displayed on the
front panel.
Responding，back：OK。
- 41 -
LOCAL
Use START to be usefuk by RS-232C. “REMOTE”message is off on the front
panel.
Responding，back：OK。
START
Start testing。
Respondence：
◎ Be functional in START command，back：OK。
◎ Be not functional in START command，back：ERROR。
STOP
Responding，back：OK.
- 42 -
Chapter 8 Specification
8.1Basic specification of AC withstanding voltage
Item：voltage
V
o
l
t
a
g
e
AC ： output
rated value
AC：waveform
AC：stability
AC：switch
AC：display
AC：accuracy
Item：current
c
u
r
r
e
n
t
AC：accuracy
AC：display
AC：calibration
TH5101 D /TH5101E
AC：0kV-2.5kV /0kV-5kV
TH5101D: 500VA/5kV,100mA(rated power voltage)
TH5101E: 200VA/5kV,40mA (rated power voltage)
Power voltage waveform
≤10％（Max. rated load is changed to empty load）
Null switch
200ms， RMS is displayed
Analog meter（2.5 class）：≤5% F.S.
Digit is displayed：
≤1.5% F.S.
TH5101D
/TH5101E
TH5101D: AC：0mA-110mA
TH5101E: AC：0mA-45mA
High limit cutoff current±(5%+20uA)
200ms，RMS is displayed
Use load with pure resistance to calibrate RMS of
current
Note 1．In AC，make use the instrument within the given range below.
Temperature t Cutoff current
Max.allowed
constant
Stop time
（℃）
I(mA)
time
50<I≤110
≥test time
≤30Min
T<=40℃
No
I≤50
Constant
requirement
Note 2. Voltage waveform：
When AC voltage is applied to capacity DUT，voltage may change larger. when
test voltage is no larger than1.5kV and test capacitance no larger than 1000pF，
the wave distortion can be ignored.
Note 3.AC setting
Item
TH5101D
High /low limit cutoff
TH5101D:
- 43 -
/TH5101E
0.1mA-110mA AC
current setting range
Judge accuracy
Judge wait time
Test time setting range
Test time accuracy
TH5101E:
0.1mA - 45mA AC
High limit cutoff current±(5%+20uA)
0.2S(fixed)
0.2s-999s/timer off function
≤20ms
8.2 Basic performance of insulation resistance
Item：voltage
Accuracy
voltage
Wave
Stability
Voltage reflection
Item：resistance
Display
resistance
RMS range
Accuracy
Voltage reflection
Max.rated load
Max.rated current
Discharge function
Output
voltage
monitoring
function
TH5101D /TH5101E
0.1kV/0.5kV/1.0kV DC
Digital meter：≤1％
Analog meter：≤1.5% F.S.
< 20mVp-p （no load）
< 100mVp-p（Max.rated load）
< 1％（0～1mA load）
200ms， RMS is displayed
TH5101D /TH5101E
0.2 MΩ－99.9 GΩ
0.2 MΩ-9.99 MΩ
X.XX MΩ
10.0 MΩ－99.9 MΩ
XX.X MΩ
100 MΩ-999 MΩ
XXX MΩ
1.00 GΩ-9.99 GΩ
X.XX GΩ
10 GΩ-99.9 GΩ
XX.X GΩ
0.1kV: 200 kΩ-1.0 GΩ
0.5kV: 1 MΩ-5.0 GΩ
1.0kV: 2 MΩ-10 GΩ
2％以下 （< 100 MΩ）
5％以下（ ≥100 MΩ）
200ms，RMS is displayed
1W（1.0kV,1.0mA）
1.0mA
Discharge when test ends
Cut off output protection function when
output is larger than ±30％
Note 1：Setting item of insulation resistance
Item
High /low limit reference
resistance setting range
Judge wait time
TH5101D
/TH5101E
0.2MΩ-99.9GΩ（independent setting）
0.3S(fixed)
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Test time setting range
Time accuracy
0.2s-999s/timer off function
≤20ms
8.3 Interface and other function
Item
Remote
control
function
Interlock
RS-232C
8.4
TH5101D /TH5101E
Remote control test start/stop，there are functions below.
Remote connector
（5-core connector ○selectable remote control box
on the panel）
○use contact device to control instrument
○use low voltage control from logic circuit
Signal
to remotely control instrument.
input/output
Low effective controlled signal
connector（25-core
1.high level input voltage：11V-15V
cable connector on
2.low level input voltage：0V-1V
the rear panel）
3.low level input current：Max. -5mA
4.inpit time： Min. 5ms
Instrument receives the interlock signal from input/output
connector(25-core cable connector on the rear panel）
9-core connector（meet the demand of EIA-232-D）
Send mode
Start－stop sync
Send rate
9600bps
Data length
8 digit
Odd and even
None
Stop
1
Signal input/output
Signal
name
Condition of generating
signal
H.V ON
Only when there is 30V voltage
TEST
In testing
PASS
Pass judge，release time about
0.2s
U FAIL
High limit fail judge
L FAIL
Low
limit fail judge
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Description
Output
level
Output
level
Output
level
Output
level
Output
level
signal HV-ON is high
signal TEST is high
signal PASS is high
signal U-FALL is high
signal L-FALL is high
Output signal READY is high
level
Output signal PROTECTION is
high level
READY
PROTECTION
8.5 General specification
Item
Environm
ent
TH5101D
Transporting
temperature
and humidity
Working
temperature
and humidity
Storage
temperature
and humidity
Power
Insulation resistance
Withstanding voltage
intensity
Ground resistance
Dimension
Weight
TH5101E
0 — +55℃, ≤ 90%RH
0 — +40℃, ≤ 80%RH
-20℃ — +70℃, ≤ 90%RH
220VAC±10%；50HZ/60HZ
500VDC，≥ 30MΩ
Between AC line and shell 1500VAC(1s)
25AAC，≤ 0.1Ω
320（W） * 132（H） * 300 （D ）mm
About 13kg
About 10 kg
8.6 Accessory
Item
TH90001R
TH90001B
TH90002
TH5100-IL
Power line
Manual
Quantity
1
1
1
1
1
1
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Note
Installing style
Chapter 9 Daily warranty
9.1 Clean
！
z
：
When cleaning instrument，make sure power is off.
9.2 Check test line and power line
！
z
：
If test line is broken（its shell is broken or line is open），the electrical
shock will be caused. Don’t use damaged test line.
a) Check power line
Check if shell is damaged，and jack is broken.
b)Check high voltage test line
Check high/low voltage test line each time：
1. Make sure test line is good.
2. Check if test line is open
9.3 Warranty
！
：
z
Let us replace the components！
9.4 Calibration
Calibrate instrument for improving accuracy！
！
z
：
The instrument will generate 5kV high voltage ！Please don’t try to
calibrate instrument by yourself！
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