Kyoritsu Electrical Instruments Works, Ltd. 3132A User manual

MODEL 3132A
ANALOGUE INSULATION-CONTINUITY TESTER
INSTRUCTION MANUAL

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CONTENTS
1. Safety warning ················································································· 1
2. Features ·························································································· 5
3. Specifications ·················································································· 6
4. Instrument Layout············································································· 9
5. Preparation for measurement·························································· 11
5-1 Mechanical Zero Adjustment···················································· 11
5-2 Battery Voltage Check····························································· 11
5-3 Test Probe Connection ···························································· 11
5-4 Test Probe check···································································· 11
6. Measurement················································································· 12
6-1 AC Voltage Warning Function ··················································· 12
6-2 Insulation Resistance Measurement·········································· 13
6-3 Continuity Testing (Resistance Tests)········································ 15
7. Battery & Fuse Replacement ··························································· 17
7-1 Battery Replacement······························································· 17
7-2 Fuse Replacement ·································································· 17
8. Notes on Accessories····································································· 18
8-1 Case Lid ················································································· 18
8-2 How to Fit Strap Belt & Test Probe Pouch ·································· 18
9. Cleaning of the Instrument ······························································ 19
10. Service························································································ 20

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1. Safety warnings
This instrument has been designed, manufactured and tested according to
IEC 61010: 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 instructions contained in this manual
before starting to use the instrument.
●Save and keep the manual at hand to enable quick reference whenever
necessary.
●The instrument is to be used only in its intended applications.
●Understand and follow all safety instructions contained in the manual.
Failure to follow the instructions may cause injury, instrument damage
and/or damage to equipment under test. Kyoritsu is by no means liable
for any damage resulting from the instrument in contradiction to this
cautionary note.
The symbol #indicated on the instrument means that the user must refer
to related parts in the manual for safe operation of the instrument. It is
essential to read the instructions wherever the #symbol 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.
#CAUTION is reserved for conditions and actions that can cause
injury or instrument damage.

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#DANGER
●Never make measurement on the circuit in which electrical potential to
ground over 600V exists.
●Do not attempt to make measurement in the presence of flammable
gasses. Otherwise, the use of the instrument may cause sparking,
which can lead to an explosion.
●Never attempt to use the instrument if its surface or your hand is wet.
●Be careful not to short-circuit the power line with the metal part of the
test leads when measuring voltage. It may cause personal injury.
● Do not exceed the maximum allowable input of any measurement range.
●Do not press the Test button with test leads connected to the
instrument.
●Never open the battery compartment cover while making a
measurement.
●The instrument should be used only in its intended applications or
conditions. Otherwise, safety functions equipped with the instrument
do not work, and instrument damage or serious personal injury may be
caused.
●Verify proper operation on a known source before use or taking
action as a result indication of the instrument.
#WARNING
●Read through and understand instructions contained in this manual
before starting using the instrument.
●Save and keep the manual handy to enable quick reference whenever
necessary.
●The instrument is to be used only in its intended applications.
Understand and follow all the safety instructions contained in the
manual.
Failure to follow the instructions may cause injury, instrument damage
and/or damage to equipment under test. Kyoritsu is by no means liable
for any damage resulting from the instrument in contradiction to this
cautionary note.
●Never attempt to make any measurement, if the instrument has any
structural abnormality such as cracked case and exposed metal part.

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●Stop using the test lead if the outer jacket is damaged and the inner
metal or color jacket is exposed.
●Do not rotate the Range 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.
●Do not try to replace the batteries if the surface of the instrument is
wet.
●Firmly insert the plug into the terminal when using test leads.
●Ensure that the instrument is powered off when opening the battery
compartment cover for battery replacement.
#CAUTION
●Be sure to set the function selector switch to the OFF" position after
use. When the instrument will not be in use for a long period of time,
place it in storage after removing the battery.
●Do not expose the instrument to the direct sun, high temperature and
humidity or dewfall.
●Use a cloth dipped in alcohol for cleaning the test leads and the part
around the measuring terminals.
●Do not store the instrument if it is wet.
●The Voltage warning mark is being displayed during a measurement
and it flashes when voltages 30V(DC/AC) or more exist on the circuit
under test.
●Always make sure to insert each plug of the test leads fully into the
appropriate terminal on the instrument.
●This instrument isn't dust & water proofed. Keep away from dust and
water.
●Keep your fingers and hands behind the protective fingerguard during
measurement.

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Please refer to following explanation of the symbols used on the instrument
and in this manual.
#User must refer to the explanation in the instruction manual.
Danger of possible electric shock
Instrument with double or reinforced insulation
Earth terminal
Protection against wrong connection is to 440V
Crossed-out wheel bin symbol (according to WEEE
Directive: 2002/96/EC) indicating that this electrical
product may not be treated as household waste, but
that it must be collected and treated separately.
Measurement categories(Over-voltage categories)
To ensure safe operation of measuring instruments, IEC 61010 establishes
safety standards for various electrical environments, categorized as o to
CAT IV, and called measurement categories.
Higher-numbered categories correspond to electrical environments with greater
momentary energy. So a measuring instrument designed for CAT III environments
can endure greater momentary energy than one designed for CAT II.
O(None, Other) : Circuits which are not directly connected to the mains power
supply.
CAT II : Primary electrical circuits of equipment connected to an AC
electrical outlet by a power cord.
CAT III : Primary electrical circuits of the equipment connected directly
to the distribution panel, and feeders from the distribution
panel to outlets.
CAT IV : The circuit from the service drop to the service entrance, and
to the power meter and primary overcurrent protection device
(distribution panel).

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2. Feature
MODEL3132A is a microcomputer controlled, high voltage insulation
resistance tester with 4-range for measuring insulation resistance.
●Designed to following safety standards:
IEC 61010-1 (CAT III 600V Pollution degree 2)
IEC 61010-2-030
IEC 61010-031
IEC 61557-1, -2, -4
●Dust and drip proof construction to IP54.
●Three insulation test ranges : 250V/100MΩ,500V/200MΩ,1000V/400
MΩ
●To continuity test ranges : 3Ω,500Ω
●AC voltage warning measurement can be made on all ranges without
depressing the test button.
●Easy for battery check.
●When the test button is released any charge stored in the circuit under
test is automatically discharged.
●Remaining electric charges can be observed on AC voltage warning
range.
●LIVE circuit audible and visual indication.
●Fuse protected.
●Color coded scales and range switch position for easy reading.
●Uses only 6 x 1.5V battery type R6P, 1.5V AA or equivalent.

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3. Specifications
●Measuring range and accuracy (at 23±5Cº, relative humidity 45-75%)
○Insulation Resistance Ranges: (IEC 61557-2)
Normal output
Voltage 250V 500V 1000V
Measuring Range 0 – 100MΩ0 – 200MΩ0 – 400MΩ
Open-Circuit
Voltage Rated test voltage +20%, -0%
Normal current 1mA DC +20%, -0%
Short-Circuit
Current About 1.3mA DC
Accuracy
guaranteed
Range
0.1–10MΩ0.2–20MΩ0.4–40MΩ
Accuracy
±5% rdg at Accuracy guaranteed ranges
±0.7% of scale length at ranges other than above ranges
○Continuity Test (Resistance Test) Ranges: (IEC 61557-4)
Ranges 3Ω500Ω
Open-Circuit
Voltage About 4.1V DC
Measuring current Greater than 200mA
Accuracy ±0.7% of scale length at other measuring ranges
Operating error
Insulation Resistance Ranges: (IEC 61557-2)
Ranges Measuring ranges to
keep operating error
Maximum percentage
operating error
250V/100 MΩ0.1–10MΩ
±30%500V/200 MΩ0.2–20MΩ
1000V/400 MΩ0.4–40MΩ
Continuity Test (Resistance Test) Ranges: (IEC 61557-4)
Ranges Measuring ranges to
keep operating error
Maximum percentage
operating error
3Ω0.2Ω–3Ω±30%

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The influencing variations used for calculating the operating error are
denoted as follows:
Temperature : 0Cº and 35 Cº
Supply voltage : 6.4V to 10.4V
Position : Reference position ±90°
※Prior to measurement, apply 0-Adjutment at each position.
○AC Voltage Warning:
Warning range 0-600V
Accuracy ±5% of scale length
Input impedance 1.2MΩ
●Typical Number of measurements (Central tendency for supply voltage
up to 6.0V)
Insulation Resistance Ranges:
1MΩat 1000V Ranges Approx. 1,400 times min.
0.5MΩat 500V Ranges Approx. 3,500 times min.
0.25MΩat 250V Ranges Approx. 5,500 times min.
Continuity Test (Resistance Test) Ranges:
1Ωat 3ΩRange Approx. 1,500 times min.
●Applicable Standards
IEC 61010-1, -2-030 Measurement voltage CAT III 600V
Pollution Degree 2
IEC 61010-031
IEC 61557-1, -2,-4
IEC 61326-1, -2-2 EMC
IEC 60529 (IP54) Dust and drip proof
EN 50581 RoHS
●Operating Temperature & Humidity:
0 - 40Cº, relative humidity up to 85%
●Strong Temperature & Humidity:
-10 - 50Cº, relative humidity up to 75%

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●Insulation Resistance: More than 50MΩat 1000V DC between
electrical circuit and housing case
●Withstand Voltage: 5160V AC for five seconds between
electrical circuit and housing case.
●Overload Protection Insulation resistance ranges:
1000V Range 1200V (DC+AC p-p) for 10 seconds
500V Range 600V (DC+AC p-p) for 10 seconds
250V Range 300V (DC+AC p-p) for 10 seconds
Continuity ranges:
3Ω/500ΩRange 280V (DC+AC p-p) for 10 seconds
AC Voltage Warning:
1200V (DC+AC p-p) for 10 seconds
●Dimensions: 106(L) x 160(W) x 72(D) mm approx..
●Weight: 560g approx. (lncluding batteries)
●Power Source: 6 x 1.5V battery type R6P, 1.5V AA or equivalent
●Accessories: Test Probe MODEL7122B x 1 set
Pouch for test probe x 1
Shoulder strap x 1
R6P batteries x 6
Spare fuse F500mA/600V x 1
Instruction manual x 1

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4. Instrument layout
①Meter movement zero adjust ②Test button
③Scale plate ④Input connector
⑤LIVE circuit lamp ⑥OHMS zero adjust
⑦Range selector switch ⑧Test probe (Red) LINE probe
⑨Test probe (Black) EIRTH probe ⑩Test probe cap (Red)
⑪Test probe cap (Black) ⑫Alligator clip (Black)
⑬Protective fingerguard

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Protective fingerguard：
It is a part providing protection against electrical shock and ensuring the
minimum required air and creepage distances.
Cap：
Uncapped condition for CAT II environment
Capped condition for CAT III/ IV environments
The Cap should be firmly attached to the probes.
Protective fingerguard
Cap

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5. Preparation for measurement
5-1 Mechanical Zero Adjustment
Check that the pointer lines up with the middle of the mark on the scale
correctly.
If not, adjust it by rotating the meter movement zero adjust with a
screwdriver, etc.
5-2 Battery Voltage Check
①Set the range selector switch to BATT. CHECK position.
②Press the test button.
③Then the pointer deflects. Judge the battery status with BATT.GOOD
mark on the scale plate.
If the pointer does not move to BATT.GOOD mark, the batteries are
exhausted. Replace them with new batteries according to section 8 for
battery & fuse replacement.
5-3 Test Probe Connection
Insert the test probe fully into the terminal of the instrument.
Connect the earth clip of the test probe (black) to EARTH terminal and the
line probe (red) to LINE terminal of the connector terminal.
5-4 Test Probe Check
Set the range selector switch to 3Ωposition and press and turn the test
button to lock it down.
When the test probe are connected together, the pointer should move
from the position towards the 0 position on the blue ohms scale. If not,
the probe or fuse may be faulty.
Release the test button after completion.
#WARNING
● When the test button is pressed with the range selector switch in the
megaohm range position, take care not to touch the tip or the test probe
where a high voltage is present in order to avoid possible shock hazard.
#CAUTION
●Do not keep the test button pressed or locked by turning it clockwise
during battery check.

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6. Measurement
6-1 AC Voltage Warning Function
#DANGER
●Never open the battery compartment cover when making
measurement.
●Verify proper operation on a known source before use or taking action
as a result indication of the instrument.
●Stop using the test lead if the outer jacket is damaged and the inner
metal or color jacket is exposed.
#CAUTION
●Keep your fingers and hands behind the protective fingerguard during
measurement.
●Never press the test button if the live circuit warning lamp is lit or the
warning buzzer sounds. This may damage the circuit.
Voltage check can be made which the range selector switch at any position.
①
The presence of AC voltage can be detected. This function operates
automatically when the test button is not depressed, I, e., in the up position,
Note : This tester has not been designed to indicate the presence of an
external DC voltage.
②Connector the earth clip of the test probe (black) to the EARTH and line
probe (red) to the LINE side of the circuit under test.
③Take th reading on the AC voltage scale.

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6-2 Insulation Resistance Measurement
#DANGER
●Always test the circuit of equipment to ensure it is surely de-energized
before measurement according to the instruction of 6-1.
●Never make measurement on a circuit in which earth potential of 600V
or higher exist.
●Never open the battery compartment cover when making
measurement.
●Never attempt to use the instrument if its surface or your hand is wet.
●Connect the Earth cord (black) to the Earth terminal of the circuit under
test.
①Check the voltage which can be applied to the circuit under test and set
the range selector switch to the designed nominal output voltage range.
②Connect the earth clip of test probe (black) to the earth terminal of the
circuit under test.
③Put the tip of the line probe (red) to the circuit under test.

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④Check the circuit under test is not energized as follows.
Connect the test probe to the circuit under test and read a voltage value.
If the circuit is live, the meter indicates the voltage, the live circuit lamp
is lit, and warning buzzer sounds.
If the meter indicates 0V, the circuit is dead.
⑤Press test button, Read the scale directly for the 500V range, multiply by
0.5 for 250V and by 2 for 1000V.
● Continuous Measurement
A lock down feature is incorporated on the test button. Pressing
and turning it clockwise, lock the test button in the continuous
operating position.
To release the lock turn the test button counterclockwise.
Never leave the test button locked down when not is use.
#DANGER
Be extremely careful not to get electric shock during insulation resistance
measurement as high voltage is present on the tip of the test probe
continuously.
⑥With the test probe still connected to the circuit under test after testing,
release the test button to discharge capacitance in the circuit.
● Automatic Circuit Capacitance Discharge Function
This function allows the capacitance stored in the circuit under test
to be automatically discharged after testing.
Discharge can be monitored by the voltage warning range.
#DANGER
Do not touch the circuit under test immediately after testing.
Capacitance stored in the circuit may cause electric shock.
Leave the test probe connected to the circuit and never touch the circuit
until the discharge is completed.

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● Output voltage characteristics
The insulation resistance tester must be capable of maintaining the
required test voltage when providing a steady atate current of 1mA.
0.5MΩfor the 500V test and 1MΩfor the 1000V test.
● Principle of Insulation Resistance Measurement
Resistance value can be obtained by
applying a Certain high voltage to the
resistance (insulation resistance) and
measuring the flowing current.
Resistance Value = Voltage / Current
RX = V / I
6-3 Continuity Testing (Resistance Tests)
#DANGER
●Always test the circuit of equipment to ensure it is surely de-energized
before measurement according to the instruction of 6-1.
●To avoid electrical shock, measurements must be performed on
deenergized circuits only.
●Never open the battery compartment cover when making measurement.

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#CAUTION
●Never press the test button if the live circuit warning lamp is lit or the
warning buzzer sounds. This may damage the circuit.
●In case that an additional operating circuit connected in parallel to the
circuit under measurement, the measurement error might be caused
due to the effects of impedance of the circuit connected in parallel or
transient current.
①Set the range selector switch to the desired position 3 ( or 500).
②Short the line probe (red) and the earth clip of the test probe (black) and
press the test button. Adjust the ohm zero adjust to zero the pointer on
the scale.
③Connect the test probes to the circuit under test.
④Check the circuit under test is not energized as follows.
Connect the test probe to the circuit under test a voltage value.
If the circuit is live, the meter indicates the voltage, the live circuit lamp
is lit, and warning buzzer sounds, If the meter indicates 0V, the circuit is
dead.
⑤Press test button. Read the blue ohm scale directly.
● Continuous Measurement
A lock down feature is incorporated on the test button.
Pressing and turning it clockwise, lock the test button in the
continuous operating position.
To release the lock turn the test button counterclockwise.
Never leave the test button locked down when not is use.
● Principle of Continuity Testing (Resistance Test)
Resistance value can be obtained by
applying a certain current to the
resistance under test and measuring
the voltage generated on the both
sides of the resistance under test.
Resistance Value = Voltage / Current
RX = V / I

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7. Battery & Fuse Replacement
#DANGER
●Never open the battery compartment cover when making
measurement.
To avoid possible electrical shock, disconnect the test probe before
opening the cover for battery and fuse replacement.
7-1 Battery Replacement
①Disconnect the test probe from the instrument.
②Open the battery compartment cover by unscrewing the metal captive
screw to reveal battery compartment. Always replace all six batteries
with new ones at the same time.
Battery type: 6 x 1.5V battery type R6P, 1.5V AA or equivalent
③Screw the battery compartment lid back on before using the
instrument.
7-2 Fuse Replacement
①Disconnect the test probe from the instrument.
②Open the battery compartment cover by unscrewing the metal captive
screw to reveal battery compartment and replace the fuse.
Fuse type: 500mA/600V (F) quick acting ceramic fuse 6.35x3.mm
③Screw the battery compartment lid back on before using the
instrument.

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8. Notes on Accessories
8-1 Case Lid
The case can be fitted under the housing case as illustrated bellow.
①Open the case lid as shown. ②Turn it 180 degrees.
③Put the case lid under ④Hook it on housing case.
The housing case.
8-2 How to fit Neck Strap & Test Probe Pouch