Instruction manual

INSULATION - CONTINUITY TESTERKEW 3021 3022 3023
KYORITSU ELECTRICAL INSTRUMENTS
WORKS,LTD.

Contents
1．Safety warnings ……………………………………………………１
2．Features ……………………………………………………………３
3．Specification ………………………………………………………４
4．Instrument layout …………………………………………………８5．Preparation for measurement ……………………………………９
5−1 Test lead connection ………………………………………９5−2 Checks on Test lead and Fuse ……………………………９6．Measurement ……………………………………………………10
6−1 Voltage measurement(Mains disconnection check) ……10
6−2 Insulation resistance measurement ………………………10
6−3 Continuous measurement …………………………………13
6−4 Output voltage characteristics ……………………………13
6−5 Measurement of resistance (Continuity check) …………14
6−6 Backlight function …………………………………………15
6−7 Auto-power-off ………………………………………………15
7. Functions keys ……………………………………………………16
7−1 Comparator function ………………………………………16
7−2 Memory (save) function ……………………………………17
8．Fuse & Battery replacement ……………………………………18
8−1 Battery replacement ………………………………………18
8−2 Fuse replacement …………………………………………18
9．Notes on Housing case and accessories ………………………19
9−1 Case lid ………………………………………………………19
9−2 Neck strap and Cord case ………………………………19
9−3 Test prods and replacement ……………………………20
9−4 Adaptors for the Earth cord and replacement……………20
10．Cleaning of the instrument ……………………………………21
11．Servicing …………………………………………………………21

１．Safety warnings○ This instrument has been designed, manufactured and tested
according to IEC 61010-1: Safety requirements for Electronic
Measuring apparatus, and delivered in the best condition after
passed the inspection. This instruction manual contains warnings
and safety rules which must be observed by the user to ensure safe
operation of the instrument and retain it in safe condition. Therefore,
read through these operating instructions before using the
instrument.

WARNING¡Read through and understand the instructions contained in thismanual before using the instrument.
¡Keep the manual at hand to enable quick reference whenevernecessary.
¡The instrument is to be used only in its intended applications.
¡Understand and follow all the safety instructions contained in the
manual.
¡It is essential that the above instructions are adhered to failure tofollow the above instructions may cause injury, instrument damage
and/or damage to equipment under test.
○The symbol indicated on the instrument, means that the user mustrefer to the related parts in the manual for safe operation of the
instrument. It is essential to read the instructions wherever thesymbol appears in the manual.
DANGER ：is reserved for conditions and actions that are likely
to cause serious or fatal injury.
WARNING：is reserved for conditions and actions that can cause
serious or fatal injury.
AUTION ：is reserved for conditions and actions that cancause injury or instrument damage.

DANGER¡Never make measurement on a circuit in which the electricalpotential exceeds AC/DC600V(Measurement CAT. III 600V).
¡ Do not attempt to make measurement in the presence offlammable gasses. Otherwise, the use of the instrument may
cause sparking, which can lead to an explosion.
¡Never attempt to use the instrument if it's surface or your hand are wet.
¡Be careful not to short-circuit the power line with the metal part of
the test leads when measuring a voltage. It may cause personal
injury.
¡Do not exceed the maximum allowable input of any measuring range.
¡Never open the Battery cover during a measurement.

― 1 ―WARNING¡Never attempt to make any measurement if any abnormal

conditions, such as a broken case or exposed metal parts arepresent on the instrument and test leads.
¡Never press the Test button when connecting the test leads to the
instrument.
¡ Never rotate the Range selector switch with the test leads
connected to the equipment under test.
¡ Do not install substitute parts or make any modification to the
instrument. Return the instrument to your local KYORITSU
distributor for repair or re-calibration in case of suspected faulty
operation.
¡ Never touch the circuit under test during/immediately after the
insulation resistance measurement. The test voltage may cause
electrical shock.
¡Do not replace batteries if the instrument is wet.
¡Ensure that the test leads are firmly inserted into the terminal.
¡Set the Range selector switch to OFF position when opening theBattery cover for battery replacement.
CAUTION¡Always set the Range selector switch to the appropriate position

before making measurement.

¡ Set the Range selector switch to "OFF" position after use andremove the test leads. The instrument consume small current at
any range other than OFF, and it shortens the battery life.
Remove the batteries if the instrument is to be stored and will not
be in use for a long period.
¡ Do not expose the instrument to direct sunlight, high temperatures, humidity or dew.
¡ Use a damp cloth with neutral detergent for cleaning the
instrument. Do not use abrasives or solvents.
¡Do not store the instrument if it is wet. Store it after it dries.
Symbols
Danger of possible electric shock

F〜

Instrument with double or reinforced insulation
AC
Earth terminal― 2 ―２．Features
KEW3021/ 3022/ 3023 are four-range digital insulation resistancetesters for testing low-voltage installation below 600V.Resistancemeasurement with audible Continuity check function is also available.
¡Designed to following safety standards:
IEC61010-1(CAT.III 600V Pollution degree 2)
IEC61010-031 (Requirements for hand-held probes)¡Small and light weight.
¡Auto-discharge function
When insulation resistance like a capacitive load is measured, electriccharges stored in capacitive circuits are automatically discharged
after measuring. Discharge can be checked with the LED &mark on LCD.
¡Two resistance ranges: 40Ω and 400Ω (2-range auto) are alsoavailable. Buzzer sounds when a measured current exceeds
200mA.
¡This instrument has 0Ω ADJ. function to null the resistance of test
lead or fuse at resistance measurement.
¡Measured value is held for about 5 sec. after insulation/ resistancemeasurement of the Test button is released.
¡Backlight function to facilitate work at night or dimly lit locations.
¡Bar-graph to indicate measured results¡Max. 99 data can be saved to the internal memory at the insulation
resistance range.
oris indicated and buzzer¡Visible and audible warning (sounds) when the measured insulation resistance exceeds the preset value.
¡Live circuit warning indication, LED and buzzer.
¡The Safety key must be kept pressed down to select 500V or 1000V
range. Otherwise, neither 500V or 1000V range can be selected.
¡Auto-power off function
To prevent the instrument being left powered on and conserve
battery power, the instrument automatically turns off approx. 15
min. after the last switch operation.
mark flickers when the battery voltage drops to the lower¡The
limit.
¡Test leads with remote control switch (voltage won't be outputtedwhen the test lead is not connected.)¡Robust housing case
¡Neck strap for both hand's operation¡User-changeable test prod
― 3 ―

３．Specification¡Applicable standards
IEC 61557
IEC 61010-1 Measurement CAT.III 600V Pollution degree2(Location for use: altitude 2000m or less)IEC 61010-031
IEC 60529
IP40¡Measuring range and accuracy<Insulation resistance range>
Nominal voltage
Auto Range
Open circuit
voltage
Short circuitcurrent
Nominal test
current
1st effective
measurement
range
Center scale
range
Accuracy
2nd effective
measurement
range

1000V

KEW3021500V
250V
0〜4/40/400/2000MΩ

Nominal test voltage 0%〜＋20%
Within 1.5mA
0.5MΩ
0.25MΩ
1mA 0%〜＋20%

0.125MΩ

0.100〜
1000MΩ

0.100〜
200.0MΩ

0.100〜
40.0MΩ

0.100〜
20.0MΩ

50MΩ

50MΩ

5MΩ

5MΩ

1MΩ

0〜
0.099MΩ
1001〜
2000MΩ

Accuracy
Accuracy at 0
Nominal voltage
Auto Range
Open circuit
voltage
Short circuitcurrent
Nominal test
current
1st effective
measurement
range
Center scale
range
Accuracy
2nd effective
measurement
range
Accuracy
Accuracy at 0

125V

0〜4/40/200MΩ

±(2%rdg＋6dgt)
0〜
0〜
0.099MΩ
0.099MΩ
200.1〜
40.0〜
2000MΩ
2000MΩ
±(5%rdg＋6dgt)
Within 6dgt

0〜
0.099MΩ
20.01〜
200.0MΩ

KEW3022
500V
50V
250V
100V
0〜4/40/200MΩ
0〜4/40/400/2000MΩ
Nominal test voltage 0%〜＋20%
Within 1.5mA
0.5MΩ

0.25MΩ
0.1MΩ
1mA 0%〜＋20%

0.05MΩ

0.100〜
200.0MΩ

0.100〜
200.0MΩ

0.100〜
40.0MΩ

0.100〜
20.0MΩ

50MΩ

50MΩ

5MΩ

5MΩ

0〜
0.099MΩ
1001〜
2000MΩ

±(2%rdg＋6dgt)
0〜
0〜
0.099MΩ
0.099MΩ
200.1〜
40.0〜
2000MΩ
2000MΩ
±(5%rdg＋6dgt)
Within 6dgt

―4―0〜
0.099MΩ
20.01〜
200.0MΩNominal voltage
Auto Range
Open circuit
voltage
Short circuitcurrent
Nominal test
current
1st effective
measurement
range
Center scale
range
Accuracy
2nd effective
measurement
range
Accuracy
Accuracy at 0

1000V

KEW3023500V
250V
0〜4/40/400/2000MΩ

100V

0〜4/40/200MΩ

Nominal test voltage 0%〜＋20%
Within 1.5mA
0.5MΩ
0.25MΩ
1mA 0%〜＋20%

0.1MΩ

0.100〜
1000MΩ

0.100〜
200.0MΩ

0.100〜
40.0MΩ

0.100〜
20.0MΩ

50MΩ

50MΩ

5MΩ

5MΩ

1MΩ

0〜
0.099MΩ
1001〜
2000MΩ

±(2%rdg＋6dgt)
0〜
0〜
0.099MΩ
0.099MΩ
200.1〜
40.0〜
2000MΩ
2000MΩ
±(5%rdg＋6dgt)
Within 6dgt

0〜
0.099MΩ
20.01〜
200.0MΩ

<Operating error>
Operating error (B) is an error obtained under the nominal operating
conditions, and calculated with the intrinsic error (A),which is an error of the instrument used, and the error (En) due tovariations. According to IEC61557, the maximum operating error
should be within +/-30%.
Ｂ ＝︱Ａ︱＋ 1.15 × √（ Ｅ12 ＋ Ｅ22 ＋ Ｅ32 ）Ａ ： Intrinsic error（％）
Ｂ ： Operating error（％）
Ｅ1 ： Variation due to changing the position（％）
Ｅ2 ： Variation due to changing the Supply voltage（％）
Ｅ3 ： Variation due to changing the temperature（％）
Nominal operating conditions
Ambient temperature : 0〜40℃
Relative humidity: 90% or lessPosition: Horizontal〜±90゜Battery voltage: within the battery effective range―5―

<Resistance range>
Auto-range
Open-circuit voltage(DC)Short-circuit current
Measuring range to keep
operating error/ tolerance
Outside of the measuring range
to keep operating error/ tolerance<Voltage range>
Measured voltage
Accuracy
Accuracy at 00〜40.00/ 400.0Ω
5V±20%
DC200mA or more
0.2〜400Ω/ ±(2%rdg + 8dgt)
0〜0.19/Ω0.1Ω

20〜600V±(3%rdg+6dgt)
Within 6dgt

<Number of measurement >Possible number of measurement within the "BATTERY.GOOD"
range.
(Measure 5 sec., and take pause for 25 sec.)
Possible number ofResistor for test
Range
measurement
0.05MΩ
at least 1300 times
50V
0.1MΩ
at least 1300 times
100V
0.125MΩat least 1200 times
125V
0.25MΩ
at least 1000 times
250V
0.5MΩ
at least 1000 times
500V
1MΩ
at least 400 times
1000V
1Ω
at least 1300 times
Continuity
Temperature&humidity range
Storage temperature&humidity range
Response time

Withstand voltage
Overload protection: 0℃〜40℃ (RH: 90% or less): (no condensation): -20℃〜60℃ (RH: 75% or less): (no condensation): Indicated value at each insulation resistance
range comes within accuracy within 5 sec. after
a resistance corresponding to the mid-valueand 0 Ω is suddenly applied across themeasuring terminals. (It may take time whenmeasuring a capacitive load.): AC5,320V(50/60Hz) for 5s. between theelectrical circuit and the enclosure．
: The instrument operates properly after each of
the voltage shown in the table below is applied
for 10 sec.

―6―

MODEL
Continuity range
Insulation
resistanceAC voltage

3022
AC600VAll ranges :AC600V
AC720V

3021 / 3023
AC600VAll ranges:AC1200V
AC720V

Auto-ranging:
Range shifts to upper range : when a reading go over 4200
Range shifts to lower range : when a reading go to less than 320
Dimension: approx. 105(L)×158(W)×70(D)mm
Weight: approx. 600g (including batteries)
Power source: R6P or LR6 size AA x 6pcs
Nominal power : 2.7VA
Accessories
MODEL7103 Test lead with remote control switch
MODEL7161 test bar
MODEL7131 Safety alligator clip
MODEL8017 Extension prod
Neck strap
Cord cas
R6P (SUM-3), size AA
Instruction manual

1 set
1 pce
1 pce
1 pce
1 pce
1 pce
6 pcs
1 pce

Optional
MODEL7115 Extension probe
MODEL8016 Pickle type prod

Pickle type prod

Extension probe

Fig. 1―7―

４．Instrument layout
Fig. 2 Instrument layout (KEW3022)① Test button③ ENTER key⑤ DOWN key⑦ Comp key⑨ Safety key⑪ LIVE LED⑬ Probe socket⑮ Line probe⑰ Standard prod (MODEL8072)⑲ Probe connector
21 Safety alligator clip○
(MODEL7131)② Range selector switch④ MEM key
⑥ UP key⑧ 0ΩADJ. key⑩ Backlight key⑫ Display⑭ Test lead with remote control
switch MODEL7103⑯ Remote control switch⑱ Earth code
⑳ Test bar (MODEL7161)
22 Extension prod○
(MODEL8017)―8―

５．Preparation for measurement
5-1 Test lead connection
Insert the Probe connector into the Probe socket on the instrument
correctly as shown below.

Probe connector

Probe socket

Fig. 35-2 Checks on Test lead and Fuse
(1) Set the Range selector switch on the instrument to theΩ
(CONTINUITY) position.
(2) Break in test lead or fuse is suspected if "OL" is displayed on the
LCD when shorting the LINE(red) and EARTH(black).
(3) Test lead or instrument itself may have troubles when "OL" isdisplayed on the LCD after replacing the fuse. In this case, send
the instrument to your local KYORITSU distributor for repair.

DANGER¡When the Test button or the Remote control switch is pressed
while the Range selector switch set to an insulation resistance
range, take care not to touch the tip of the Test probe where a highvoltage is present in order to avoid possible shock hazard.
¡Test lead and fuse must be inspected prior to measurement
according to Clause 5-2 indicated in this manual in order to avoid
possible electrical shock hazard. Voltage cannot be measured if abreak is present on the fuse.

―9―

６．Measurement
6-1 Voltage measurement (Mains disconnection check)(1) Connect the Earth probe to the earth of the circuit under test andLine probe to the other side. If the circuit is not earthed, connect
Earth probe to any appropriate conductor.
(2) Take the reading on the LCD without pressing the Test button or
Remote control switch. The mark "〜" is displayed whenmeasuring AC voltage. The mark "− (minus)" is displayed whenthe LINE probe is connected to the negative side of the conductor
under test to measure DC voltage. "Lo" is displayed on the LCD
when the measured voltage is under 20V.
CAUTION

Never press
remote switcth

CAUTION

Never press
test button

Fig. 4DANGER¡Test lead and fuse must be inspected prior to measurement
according to Clause 5-2 indicated in this manual in order to avoid
possible electrical shock hazard. Voltage cannot be measured if abreak is present on the fuse.
¡Never make measurement on a circuit in which the electricalpotential exceeds AC/DC600V in order to avoid possible shock
hazard. (Refer to "3.Specification, AC voltage measurement.")¡When testing installation that has a large current capacity, such asa power line, be sure to make measurement on the secondary sideof a circuit breaker in order to avoid personal injury.
¡Do not press the Test button or Remote control switch during
voltage measurement.
¡ Never short live conductors with the tip of a probe to avoid
personal injury.
¡Do not make measurement with the Battery cover removed.
6-2 Insulation resistance measurement
Before performing any insulation test, check the maximum voltagethat may be applied to the circuit under test.

― 10 ―

Note:¡Some circuits have an unstable insulation resistance, which causes
the reading to vary during measurement.
¡The instrument may generate a high pitch tone during
measurement. This is not a failure.
¡If the circuit under test has a large capacitive load, it may takesome time before the final reading can be obtained.
¡On insulation resistance range, DC voltage is supplied throughearth and Line probes, with earth probe having positive polarity.
Earth probe should be connected to the earth conductor in the circuitunder test. Such connection is known to be more suitable forinsulation tests since an insulation resistance value measured withthe positive side connected to earth is typically less than that taken
through the reversed connection.
DANGER¡When the Test button or Remote control switch is pressed with theRange selector switch set to an insulation resistance range
position, take care not to touch the tip of the test probe or thecircuit under test where a high voltage is present in order to avoid
possible shock hazard.
¡Do not make measurement with the Battery cover removed.
CAUTION¡Ensure that the circuit under test is de-energized prior to any
insulation testing.
(1) Check the maximum voltage that may be applied to the circuitunder test. Set the Range selector switch to a desired insulation
resistance range. Keep the Safety key pressed down when turning
the Range selector switch to 500V and 1000V position. (Only the
500V range is available on KEW3022.) The message "no" isdisplayed on the LCD when turning the Range selector switch
without pressing the Safety key.
¡Buzzer sounds when the Safety key is pressed down.
Keep the Safety key pressed down when switching 500V and 1000V.

Fig. 5― 11 ―

(2) Connect the Earth probe to the earth terminal of the circuit under
test. If the circuit is not earthed, connect the Earth probe to any
appropriate conductor.
(3) Connect the Line probe to the circuit under test and press the Test
button or Remote control switch.
(4) Take the reading on the LCD.

Fig. 6

Fig. 7

Principle of operation:
Resistance = Voltage/ Current
RX = V/ I(5) Set the Range selector switch to the OFF position and disconnect
the test leads from the instrument after measurement.
<Auto discharge function>
This function allows electric charges stored in the capacitance of thecircuit under test to be automatically discharged after testing.
Set the Range selector switch to the OFF position or turn the Remotecontrol switch off with the test lead connected.
Discharge can be monitored by the LIVE LED
and mark.

Fig. 8― 12 ―

(6) Set the Range selector switch to the OFF position, and disconnect
the probes from the instrument.
DANGER¡Never touch the circuit under test immediately after testing.
Capacitance stored in the circuit may cause electric shock.
Leave the test leads connected to the circuit until the LIVE LED
and LIVE circuit warning stop flickering.
6-3 Continuous measurement
For continuous measurement, a lock-down feature is incorporated on
the Test button. Pressing and turning clockwise locks the button in
the operating position, the button is released by turning it
counterclockwise.

DANGER¡While the Test button is locked down, a high voltage is present at
the tip of a probe. Attention should be paid to avoid possible shock
hazard.
6-4 Output voltage characteristics
This instrument conforms to IEC61557. This standard defines that thenominal current shall be at least 1mA, and the lower limit of theinsulation resistance maintaining the nominal voltage at themeasurement terminal. (See the graph below.)This value is calculated by dividing the nominal voltage by nominal
current. i.e., in case that the nominal voltage is 500V, the lower limitof the insulation resistance is found as follows.
Divide 500V by 1mA equals 0.5MΩ.
That is, insulation resistance of 0.5MΩ or more is required to provide
the nominal voltage to the instrument.

Nominal voltage

50V

100V

250V

500V

1000V

Lower limit of insulation resistanceto supply nominal
current 1mA

50kΩ

0.100MΩ 0.125MΩ 0.25MΩ

0.5MΩ

1MΩ

125V

― 13 ―

Fig. 96-5 Measurement of resistance (Continuity check)
DANGER¡Do not apply voltage to the resistance range. Always test the circuitor equipment to ensure it is surely de-energized before
measurement.
Zero Ω ADJ. function
This is a function to null the resistance of the test lead or fuse in order
to display the resistance of the equipment under test only.
Setting:(1) Set the Range selector switch to theΩ(Continuity) position.
(2) Short the test leads: LINE (red) and EARTH (black).
(3) Press the Zero Ω ADJ. key with the Test button locked or with the
Remote control switch pressed. Thenmark is lit up and avalue of 0.00 Ω is displayed on the LCD. This value is saved in
the memory of the instrument and won't be cleared after turning
off the instrument.
― 14 ―

Releasing:(1) Set the Range selector switch to theΩ(Continuity) position.
(2) Open the test leads: LINE (red) and EARTH (black).
(3) Press the Zero Ω ADJ. key to release this function when "OL" isdisplayed on the LCD while the Test button is locked or the
Remote control switch is pressed down .
Measurement:(1) Set the Range selector switch to the Ω (Continuity)position.
(2) Connect the test leads to the equipment under test, and press theTest button or Remote control switch.

Principle of operation:
Resistance = Voltage/ Current
RX= V ／ I

Fig. 10
Note:¡The zero Ω ADJ. function is available when the indicated value isunder 9 Ω.
¡A beak in Test lead or fuse is suspected when "OL" is displayed on
the LED even if LINE (red) and EARTH (black) are shorted.
¡Change the connection of LINE (red) and EARTH (black) whenmeasuring the voltage with the switched polarities.
¡The measurement result at the resistance function may be effectedby the impedance or transient current in the operating circuit, whichis connected in parallel to the instrument.

6-6 Backlight function
To facilitate working in dimly lit situations, abacklight function is provided which
illuminates the display. Press the backlight
key to operate this function. The backlightwill light up for about 60 sec., and then turns
off automatically.
Fig. 11

6-7 Auto-power-off
To prevent the instrument being left powered on and conserve battery
power, the instrument automatically turns off approx. 15 min. after thelast switch operation.
To turn on the instrument again, turn the Range selector switch to
OFF position once.
Then set it to the desired range.
― 15 ―

7．Functions keys
7-1 Comparator function
Set a reference resistance value at the insulation resistance range.
The measured value is compared to the pre-set reference value, andthe mark oforis displayed on the LCD and buzzer
Settable reference value:
0.1/0.2/0.25/0.4/0.5/1/2/3/5/10/20/30/50/100/Any : Unit [MΩ]
The upper limit of "Any" varies depending on output voltage.
50/100/125Ｖ: 0.000 to 199.9: Unit [MΩ]
250/500/1000Ｖ: 0.000 to 999.9 : Unit [MΩ]This function can be set at each range.
Setting procedure(1) Set the Range selector switch to any desired insulation resistancekey pressed down.
range with the
In this case, there is no need to press the Safety key to set therange selector switch to 500V or 1000V range.
orand then press(2) Press the UP or DOWN key to selectkey.
theSelectto sound the when the measured value exceeds the
pre-set value.
Selectto sound the when the measured value is under the
pre-set value.
(3) The number displayed at the lower left on the LCD starts
flickering. Press the UP or DOWN key to select the reference
key.
value, and press the(4) The message
and the set value are displayed on the LCD
once the setting completes.
(5) Press the
key to release this function.
Setting for Any(1) The decimal point displayed at the lower left on the LCD starts
flickering when "Any" is selected. Press the UP or DOWN key tokey.
select the desired decimal position, and then press the(2) The four-digit start flickering from the left. Press the UP or DOWN
key and set it to the desired value, and press thekey.
e.g.: in case 0.5MΩ is set.

Fig. 12. Change of sub-indication― 16 ―

7-2 Memory (save) function
Measured insulation resistance can be saved to the internal memory
up to 99 data.
Saving method:(1) Measure the insulation resistance, and press the MEM key while
the message
is displayed on the LCD.Then a memory
number displayed at the lower left flickers.Select any memory
number with the UP or DOWN key, and press thekey.
(2) Then, the measurement result displayed at the middle on the LCD
flickers. Press the
key to save the result.It will be saved tothe internal memory, and the memory number is increased by 1.
Press thekey to delete the result.
Recalling the memory data
(1) Set the Range selector switch to any desired Insulation resistance
range, and press thekey.
(2) Press the UP or DOWN key to switch the memory number.The
measured voltage and value are displayed on the LCD.
Deleting all memory data
(1) To delete all memory, rotate the Range selector switch from OFF
to Ω(CONTINUITY) position with the
key pressed down.Then
release thekey.
(2) The message "clr" is displayed on the LCD. It flickers and buzzer
sounds when the
key is being pressed down again. The
deletion is completed once "Ω" is displayed on the LCD.
Note:
¡The mark "---" is displayed on the LCD when no data is saved withthe selected memory No.
¡Resistance value is displayed on the LCD when data is saved withthe selected memory No.
¡Old data is overwritten with new when a new data is saved with thesame memory No.
― 17 ―

8．Fuse & Battery replacement
DANGER¡Never open the Battery cover during a measurement.Dispose
the used batteries according to the rules, which is defined byeach community.

WARNING¡To avoid possible electric shock, remove test leads before
opening the Battery cover. After replacing batteries, be sure totighten up the screws for Battery cover.

CAUTION¡Do not mix new and old batteries.
Install batteries in correct polarity as marked inside the Battery
compartment.
8-1 Battery Replacement(1) Disconnect the test probe from the instrument.
(2) Open the battery compartment cover by unscrewing the metal
captive screw to reveal battery compartment.
(3) Always replace all six batteries with new ones at the same time.
(4) Screw the battery compartment lid back on before using the
instrument.
8-2 Fuse Replacement(1) Disconnect the test probefrom the instrument.
(2) Open the battery compartment
cover by unscrewing the metal
captive.Screw to reveal battery
compartment and replace thefuse.
Fuse type: 500mA/600V(F)quick acting ceramic fuse
6.35 x 32mm.
(3) Screw the battery compartment
lid back on before using the
instrument.

SCREW

FUSE
BATTERY― 18 ―SPARE
FUSE

Fig. 13

9．Notes on Housing case and accessories
9-1 Case lid
Case lid can be fit under the Housing case while making measurement.
(1) Unhook and open the Case lid.
(2) Turn it 180 degrees.
Put the Case lid under the Housing case.
(3) Hook it on to the Housing case.

Fig. 14

9-2 Neck strap and Cord caseThis instrument is equipped with a strap to suspend from the neck toallow both hands to be used freely for easy and safe operation.

Fig. 15― 19 ―

9-3 Test prods and replacement
1. Types of Test prods
MODEL8072: Standard Test prod
Used for ordinary measurement.
(Attached to the Line probe at the time of purchase.)
MODEL8017: Extension probe
Used in difficult-to-reach situations.
MODEL8016: Pickle prod (Optional)
Used to hook the probe on a conductor.
2. How to replace Test prod
To remove the Test prod, turn the cap of LINE probe
counterclockwise. Insert the threaded end of another prod into thehexagonal hole on the probe cap as shown. Then, turn the probe
cap clockwise to secure it on the body of the probe.
Male Screw
FemaleScrew
Hexagonal Hole

Extension Prod

Prod

Fig. 16

Pickel Prod

9-4 Adaptors for the Earth cord and replacement
1. Adaptors
MODEL7131: Safety alligator clip
Connected to the Earth terminal of the Earth terminal board.
MODEL7161: Test bar
Connected to the earth side of the outlet.
2. How to replace Adaptors
To remove the adaptors, pull them out. Then firmly attach theadaptor as desired to the tip of the Earth cord.
Safety alligator clip

Fig. 17

Test bar

DANGER¡Disconnect the test leads from the instrument before replacing

the test prods of the Line probe or the adaptors of the Earthcord in order to avoid a possible electric hazard.
― 20 ―

10．Cleaning of the instrument
Cleaning Meter cover¡When cleaning the instrument, wipe it with a silicon cloth or soft

cloth to remove dust or dirt.
¡When it is hard to remove the dirt, wipe it with a cloth wet withwater and dry the instrument completely after cleaning.

CAUTION¡Never use any solvent which may transmute plastics, forexample, organic solvent such as benzene, acetone, etc.

11．Servicing
If this tester should fail to operate correctly, return it to yournearest distributors stating the exact nature of the fault.
Before returning the instrument, make sure that:a) Operating instructions have been followed.
b) Test Leads have been inspected.
c) Fuse has been checked.
d) Battery has been checked.
e) The unit is returned with all accessory leads.
Remember, the more information written about the fault, thequicker it will be serviced.

― 21 ―

DISTRIBUTORKYORITSU ELECTRICAL
INSTRUMENTS
WORKS, LTD.
No.5-20, Nakane 2−chome,Meguro-ku,
Tokyo, 152-0031 Japan
Phone:81−3−3723−0131 Fax:81−3−3723−0152
URL:http://www.kew-ltd.co.jp
E-mail:info@kew-ltd.co.jp
Factories:Uwajima & Ehime
04-12

92-1635A