Model AR907A+

Voltage Insulation Tester

Instruction Manual

GUARD EARTH CAT. LINE

600V Max
GUARD EARTH CAT. LINE
600V Max

Insul ation Tester

Insulation Tester

TOTDOI S
DCI SHCAH A TIMER
R GR GTIMER
A UA U EE
AR907A+
AR907C
00
2500V
2500V
1000V
1000V
500V
PRESS TO TEST 500V
PRESS TO TEST
OFF
OFF
250V
250V
LOCK
LOCK 100V
100V
AC.V
AC.V
Precaution

Thank you for purchasing our company's insulation

tester.
This manual provides relative information on how to
use the unit and warnings in operation.
to make the best use of the products's functions read
the manual throughly before use ,Please keep the
manual for quick reference.
Please make some simple test measurement to ensure
proper performance of the unit.

Statement:

We reserve the rights of upgrading and amending

the design of the product as well as the manual updating,
and the product is subject to change without any further

Other items
notification.
 Maintenance and warranty CONTENTS
Maintenance: 1 Before use

1. Do not store or use the unit in following circumstance: Check up 01

a. Splashes of water or high levels of dust.
b. Air of high salt or sulphur content. Safety warning 02
c. Air mixed with other gases or chemical contents.
Features 04
d. High temperature or humidity (above60 , 90%RH,) or
direct sunlight. Specification 04
2. Do not disassemble the unit or attempt any internal a
lterations. Diagram of the products 06
3. Never use alcohol or diluents to clean the housing for LCD Displays 08
doing that will especially erode the LCD surface;just
clean the unit lightly as needed with little cleanwater.
2 Operation
Warranty:
Preparation before measurement 09
1. About relative warranties please read warranty card. AC Voltage measurement 11
2. We disclaim any liability due to: client's transportation
damages; incorrect use or operation; manipulation, Insulation resistance measurement 13
alterations or repair attempts; without warranty card, Continuous Measurement 16
invoice.
The use of the green protect line 17

3 Other Items

Attentions 18
Maintenance and warranty 19
Special Declaration 20
1 Before Use 3 Other items

Check Up Attentions

Carefully unpack your kit and ensure that you have the 1. The screen is blank after turn on:
following items ,in case that any item is missing or if you Check up if the batteries have been installed correctly.
find any mismatch or damage ,promptly contact your dealer. the “+” “-” polarity of the batteries must match the symbol
Insulation Tester 1pcs inside the battery compartment.
2. If the battery power lower than 7.2V±0.2V, LCD will
English Instruction Manual 1pcs
display low battery icon " ", please replace the
Warranty Card 1pcs batteries to prevent inaccurate readings. The replace battery
Test wire Alligator clip 3pcs method pls refer the contents of page09.
1.5v AA Battery 6pcs 3. Remove the batteries from the unit if it is not required for
extended periods of time in order to avoid damage to the
PP packing Box 1pcs
battery compartment and the erosion resulting from a
battery leakage.

Other items
 Green Guard wire usage Safety Precaution

Plug the green guard test wire into GUARD socket the The instrument is designed to following standards
Green wire only use in insulation test, during measurement IEC 61010-1 CAT.III 600V Type 2
clip the guard wire to the shielded wire to reduce the IEC 61010-031 ( Hand lever Probe standards )

Need To know
interference of the current.the connecting methods as below
Warning:

Before use
Electricity is dangerous and can cause injury/Death ,For use
the instrument correctly and safely.
Green Black Red
guard wire earth wire line wire Pls read this manual carefully and follow the instruments.

The symbol“ ” in this manual have three meanings

pls pay attention the operation with “ ” symbol .

GUARD EARTH CAT. LINE

600V Max Danger--- That conditions operation likely to cause
serious or fatal injury.
Warning--- That conditions operation can cause
serious or fatal injury.
Caution--- That conditions operation likely to cause
a injury or instrument damage.
CORE WIRE
POWER LINE
SUPPLY LEAK CURRENT ISOLATION
MATERIAL Danger
GUARD PROTECTIVE
WIRE Do not measure if the voltage is above 600V.
Indicator Do not test at flammable / explosive hazard.
Do not measure if the unit or your hand is wet.
ISOLATION Do not go beyond the range of the tester
EARTH SCARF SKIN Do not open the battery door when you are measuring.
Make sure switch to off position after measured,Do not
(Instrument)
touch any bare wire during testing.
 Warning Continuous Measurement
The tester must be operated according to this manual
by qualify person who have passed the training. 1. About the first and second procedure, please refer
Do not open the case while testing. If the tester “insulation measurement”.
not working properly, please return for repair. 2. Connect with the parts under test, press the TEST switch
Do not replace the batteries in a humidity condition. and Clockwise rotate to enter continuous measurement,the
Make sure the wire firmly connected to the tester. buzzer sound DiDi the LCD display as below:
Make sure to turn of f the power before open the battery
door.
Check the tester regularly, do not operate if the tester is
not normal(such as lead wire is cracked, the case broken
etc.)
Do not attempt any alterations. Please contacted your
dealer if the tester need to be repaired.

Until contrarotate and release the TEST switch to original

Explanations
Caution
position , the high voltage indicator and Alarm will turn off

Operation
Before testing, make sure to select proper range.
Make sure switch to off position after measured,remove gradually,,instrument on testing status ,release the button
the battery from the instrument if it it not required for the unit will auto discharge the voltage .Only disconnect
extended periods of time in order to avoid eroding of the testing wire after the LCD Display OV.
battery case electrode piece resulting from a leaking
battery.
Instrument wet ,dry first then store.
Do not store the instrument in high temperature
humidity or under sunshine
Wipe off the dirt with a damp soft cloth ,do not use
aggressive cleaning agents or solutions.
3.Remove the test wires, and turn the Functional switch to
Danger of possible Electric Shock
“OFF” position turn off
Instrument with double or Reinforced insulation
DC
Caution
AC The data in the operate instruction is only for
Ground Terminal demonstration to make you understand easily, please
refer it according to the measured data in practice.
 DANGER Features and functions
Do not touch the circuit bare wire under test immediately
after testing. capacitance stored in the circuit may cause
electric shock. Auto discharge function, operate more safety
LCD backlight

Need To know
5 Remove the terminal pins/alligators to the part under test Live wire warning and audio indication
then switch to “OFF” position power off.

Before use
Auto power off in 10 minutes,without any operation
6 The test principle of the insulation resistance: Low battery indication
Resistance value was triggered by applying a certain high
voltage to trigger following current R=V/I

(LINE)

CURRENT

RX Specification
High voltage EARTH(+) 1.Insulation resistance test

Indicator Rated
Voltage 100v 250v 500v 1000v 2500v

0.0-10M 0.0-10M 0.0-99.9M 0.0-99.9M 0.0-99.9M

Testing 100-999M
100-999M
Range 10-100M 10-100M 100-999M 1.00-9.99G
Caution: 100-200M 100-500M 1.00-19.9G
1. The unit will auto power “OFF” after 10 minutes without 10.0-49.9G
any operation to save the battery power, if you need to Open DC 100V DC 250V DC 500V DC 1000V DC 2500V
restart the unit, just turn the power switch to “OFF” Circuit
Voltage +10%-0% +10%-0% +20%-0% +20%-0% +20%-0%
position and turn on.set the power switch to “OFF”
position when you do not use the instrument. 0.5M 0.5M 0.5M 1.0M 2.5M
Rated
0.2mA- 0.5mA- 1mA- 1mA- 1mA-
Current 0.25mA 0.55mA 1.1mA 1.1mA 1.1mA
2. The “Test” switch have two test methods:
a. Instant measurement: Press the “Test” switch and not Short
Circuit 1.3Ma Approx
rotate, it will produce high voltage to test insulation current
release the button to stop measurement.
8%rdg 100K~10G
b. Continuous measurement: Press the “Test” switch and Accuracy
turn to lock it for measurement continuously, turn 10%rdg (10G ~50G )
and release the switch will stop the measurement.
2 Voltage Measurement After full LCD display for one Sec, LCD shows as below:
30~600V (Resolution: 1V):

AC Voltate
Range 30~600V (50/60HZ)
Resolution 1V
Accuracy 2% rdg 3dgt

3 Connect the terminal pins/ alligators to the part undertest,

3.Technical specification: press and turn TEST button to measure, the buzzer will
sound continuously and the high voltage light will flash.
Parameter Index LCD display as the figure below during the testing:
LCD display Max 999 counts
Over range OL: appears on insulation resistance

Explanations
indication Lo : appears on votage

Operation
Rang shift to upper range : 1000 counts
Auto range Range shift to lower range : 95 counts
(only on insulation )
Sampling rate 0.5~10 times / sec
Operation alititude 2000m( indoor use)
Operation temperature: 0 -40 / humidity: 85%
circumstance 4 Release the button, the instrument will discharge the high
Storage temperature : -20 -60 / humidity : 90%
circumstance voltage automatically, and the high voltage light and alarm
Over load Insulation re : AC 1200V/10 sec sound will turn off. Remove the terminal pins/alligators
protection Voltage : AC 7 20V/10 sec only after the LCD display 0V.The insulation resistance
Withstand voltage AC 8320V(50/60Hz)/sec
reading display on the LCD as the figure below:
Withstand
Insulation 1000M /DC 1000V
resistance
Power supply DC9V(6x1.5V AAbatteries)
Battery approx. 800mA( max )
consumption
Battery life approx. 15 hours
Dimension 125.4X174.6X69mm
Weight 547.44g ( without battery and test wire)
 Insulation resistance measurement Diagram of the product

Danger 4 5 6
Make sure that there is no electrical charge exists on the
circuit and Capacitor under test.

Need To know
Be sure to put on a pair of insulated gloves for high voltage.. GUARD EARTH CAT.
600V Max
LINE

Before use
Do not make measurement when thunder rumbling.
Do not make the measurement with the battery cover
removed.
1
Caution
When the live circuit warning is indicated or the warning Ins ulation Tester

buzzer sounds, measurement cannot be made at this time 2 TO D I S C H A R GTIMER

AU E
AR907A+
0
2500V

1.Connect the red test wire and black test wire to reciprocal 500V
1000V

terminal. PRESS TO TEST

3
OFF

2.Setting the function switch to proper position according to 7 LOCK

250V

100V

the content of insulation material, (you can take a try follow AC.V

the sequence 100V/250V/ 500V/ 1000V/2500V if you do

not know the resistance range) for example, 2500V like the
following picture:
Black Red
earth wire line wire
GUARD EARTH CAT. LINE
600V Max

In sulation Tester

TO D I S C H A R GTIMER
AU E
AR907A+
0
2500V
1000V

500V
PRESS TO TEST
OFF

250V
LOCK
100V

AC.V
1. LCD display 3 After the full LCD display one sec, the LCD shows as
2. High voltage indication light below,do not press TEST button, the unit have the auto
AC detection function.
3. Function knob
4. Socket for black Guard test wire
5. Socket for black Earth test wire
6. Socket for red Line test wire
7. Test button
8. Black Earth test wire
9. Black alligator clip 4 Connect the red black wire or pin to the tested electrode
10. Red Line test wire the LCD shows the reading as
below:
11. Red alligator
12. Green Guard test wire

Explanations
13. Green alligator clip

Operation
5 Remove the test pin from the tested parts firstly after
measurement ,and then set the function switch to OFF
position.

Note:
Above descriptions just are simple introduction,
please read operation instructions part in this
manual for details.
 Voltage measurement(AC 30V~600V) LCD Display
1 2 5 3
DANGER
Do not make measurement on a circuit above AC 600V

Need To know
The user maybe hazard when testing voltage that has a large
current capacity, please do not touch any bare wire at this 6

Before use
time.
7
Do not make measurement with the battery cover removed. 4
8
9
1.Connect the red black earth test wire to reciprocal
terminal.
2.Setting the function switch to AC. V position, like the
picture as below: 1. : Back light indication icon
2. : High voltage warning icon
Black Red
earth wire line wire 3. : Batter power icon, shows current battery
voltage as following 5 grades:
GUARD EARTH CAT. LINE
600V Max
:battery is sufficient
:battery is comparative sufficient
:battery is nearly deficient
:battery is nearly exhausted, need to have a replacement
:battery is exhausted completely.
Insulat ion Tester 4. : AC symbol
5. Voltage reading area
TO D I S C H A R GTIMER
AU
0
E
AR907A+
6. : Unit of voltage
2500V
1000V

PRESS TO TEST
500V 7. Voltage / Insulation resisance value reading
OFF

250V 8. : Unit of Insulation

LOCK
100V

AC.V
9. : Unit of voltage / insulation
 2. Test wires connection:
2 Operation Insert the test wire firmly to the connector terminal on the
instrument;
Preparation before measurement Connect the red test wire to “Line” terminal;
Connect the black test wire to “Earth” terminal;
1. Checking the battery power and battery replacement Connect the Green guard wire to “Guard” terminal; the green
a. Set the function switch to turn on. guard wire only use in insulation measurement, when take
b. When the battery icon shows on the LCD, it means measurement clamping on the shield line the avoid the
the battery almost exhausted. Please replace the battery to current interference.
avoid in-accurate measurement.
c. Battery replacement: The connect method like the picture below:
1> Turn off the unit and unplug the test wires. Green Black Red
2> Uninstall the battery door screw, and open the battery guard wire earth wire line wire
door.
3> Unload the old batteries, and load the new batteries.
4> After load the new batteries, put the battery door back
and fasten the screw. As figure below

Explanations
Operation
GUARD EARTH CAT. LINE
600V Max

In sulation Tester

TO D I S C H A R GTIMER
AU E
AR907A+
0
2500V
1000V

Note: PRESS TO TEST

500V

OFF

Remove the batteries from the unit if it is not LOCK

250V

required for extended periods of time in order 100V

AC.V

to avoid damage resulting from leaking battery.