KYORITSU 3127 User Manual
INSTRUCTION MANUAL
HIGH VOLTAGE INSULATION TESTER
KEW 3127
Contents
1．Safety warnings ･･･････････････････････････････････････････････････1
2．Feature ･･････････････････････････････････････････････････････････5
3．Specification ･･････････････････････････････････････････････････････ 6
4．Instrument layout ･････････････････････････････････････････････････10
4-1 Instrument layout ････････････････････････････････････････････10
4-2 LCD display ･････････････････････････････････････････････････ 11
4-3 Opening and closing Hard case ････････････････････････････････12
4-4 Taking out KEW3127 from the Hard case ･･･････････････････････12
5. Preparation for measurement ･･･････････････････････････････････････13
5-1 Checking the battery voltage ･･････････････････････････････････13
5-2 Connecting test leads ････････････････････････････････････････13
6. Measurement ･････････････････････････････････････････････････････14
6-1 Mains disconnection check (Voltage measurement) ･･････････････14
6-2 Insulation resistance measurement ･････････････････････････････15
6-3 About BREAKDOWN mode and BURN mode ････････････････････19
6-4 Continuous measurement ･････････････････････････････････････ 20
6-5 IRPI/DAR Measurement ･････････････････････････････････････････ 21
6-6 SV Measurement (Step Voltage) ･･･････････････････････････････ 27
6-7 DD Measurement (Dielectric Discharge) ････････････････････････28
6-8 Ramp Measurement ･･････････････････････････････････････････30
6-9 Voltage characteristics of measuring terminal ････････････････････ 32
6-10 Use of Guard terminal ･･･････････････････････････････････････32
6-11 Filter function ･･･････････････････････････････････････････････33
6-12 Backlight function ･･･････････････････････････････････････････ 33
6-13 Auto-power-off function ･･････････････････････････････････････33
7. Memory function ･･････････････････････････････････････････････････34
7-1 Function details ･･････････････････････････････････････････････34
7-2 How to save data ････････････････････････････････････････････ 35
7-3 How to recall saved data ･･････････････････････････････････････ 36
7-4 How to delete data ･･･････････････････････････････････････････37
8．Clock Setting ････････････････････････････････････････････････････38
9. Communication Function/ Software ･･････････････････････････････････39
9-1 KEW3127 Settings ･･･････････････････････････････････････････ 39
9-2 How to install the Software ････････････････････････････････････42
9-3 How to start KEW Windows for KEW3127 ･･･････････････････45
9-4 Features of KEW Smart ･･･････････････････････････････････････47
10．Battery Charging and Replacement ･･･････････････････････････････48
10-1 How to charge battery ･･･････････････････････････････････････48
10-2 How to replace battery ･･･････････････････････････････････････49
11．Accessories ････････････････････････････････････････････････････51
11-1 Metal part for Line Probe, and replacement ･････････････････････51
11-2 How to use the adaptor for recorder ･･･････････････････････････52
11-3 Line probe with alligator clip ･･････････････････････････････････52
12. Disposing the Product ････････････････････････････････････････････53
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.
It is essential that the above instructions are adhered to. Failure to follow the
above instructions may cause injury, instrument damage and/or damage to
equipment under test.
The symbol
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.
# indicated on the instrument means that the user must refer to
# 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.
－ 1 －
# 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 apply inputs exceeding the maximum allowable measuring range.
● Do not press the Test button with test leads connected to the instrument.
● Never open the battery compartment cover while making a measurement.
● Do not touch the circuit under test while measuring insulation resistance or
right after a measurement. You may get an electric shock by a test voltage.
# WARNING
● Never attempt to make any measurement if any abnormal conditions are
noted, such as broken case and exposed metal parts or when inner jackets
are seen through the nicked outer jacket.
● 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 recalibration.
● Do not try to replace the battery 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.
－ 2 －
# CAUTION
● Always make sure to set the Range switch to the appropriate position before
making a measurement.
● Set the Range Switch to OFF position after use and disconnect the
test leads from the instrument. Remove the battery if the instrument is to be
stored and will not be used for a long period.
● 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.
Symbols
Danger of possible electric shock
Instrument with double or reinforced insulation
DC
AC
Earth terminal
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.
－ 3 －
○ 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 : Circuits which are not directly connected to the mains power supply.
CAT.II : 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).
－ 4 －
2. Feature
KEW3127 is a microcomputer controlled, high voltage insulation resistance tester
with 5-range for measuring insulation resistance.
● Designed to following safety standards:
IEC 61010-1 (CAT. IV 600V Pollution degree 2)
IEC 61010-031 (Requirements for hand-held probes)
● With auto-discharge function
When insulation resistance like a capacitive load is measured, electrical charges
stored in capacitive circuits are automatically discharged after measuring.
Discharge can be checked on the voltage monitor.
● Backlight function to facilitate working at dimly illuminated location or at
nighttime work.
● Bar graph to display measured result
● LIVE circuit warning symbols plus audible warning
● With Auto-power off function
To prevent the instrument being left powered on and conserve battery power,
the instrument automatically turns off approx. 10 min. after the last switch
operation.
● Auto-measurement and display of PI (Polarization Index), DAR (Dielectric
Absorption Ratio) and DD (Dielectric discharge), Step Voltage (SV), leakage
current and capacitance measurements, and Ramp measurement for
breakdown voltage check.
● Filter function to reduce the variations in readings due to external influences
● With a short current of max 5mA, quick measurement is possible even if the
object under test has capacitive components.
● Internal saved data and real-time measuring data can be transferred to a PC
via Bluetooth communication or by using special USB adapter (MODEL8212
USB). Easy settings for KEW3127 and data analysis via PC are possible with
the application software.
－ 5 －
3. Specification
● Applicable standards
IEC 61010-1 Measurement CAT. IV 600V Pollution degree2
IEC 61010-031 Standard for hand-held probes
MODEL7165A(CAT. IV 600V)
MODEL7224A(CAT.IV 600V)
MODEL7225A(CAT.IV 600V)
* When KEW3127 and the test lead are combined and
used together, whichever is lower category either of
them belong to is applied.
IEC 61326-2-2 EMC standard
IEC 60529 IP40(Instrument)
IP65 (Hard case)
● Measuring range and accuracy (Temperature, humidity: 23±5Cº, 45 - 75%RH)
<Insulation resistance tester>
Rated
voltage
Measuring
range(*2)
Display range
Open circuit
voltage
Rated
current
Short-circuit
current
250V(*1) 500V 1000V 2500V 5000V Accuracy
0.0-99.9MΩ
100-999MΩ
1.00-9.99GΩ
0.0M - 12.00GΩ 0.0M-120.0GΩ 0.0M-240GΩ 0.0M-1200GΩ 0.0M-12.00TΩ
DC 250V
+10%, -10%
0.0-99.9MΩ
100-999MΩ
1.00-9.99GΩ
10.0-99.9GΩ
DC 500V
+20%, -10%
For 10 sec after a test is started : max 5mA,
after that : 1.4mA
0.0-99.9MΩ
100-999MΩ
1.00-1.99GΩ
2.00-9.99GΩ
10.0-99.9GΩ
100-199GΩ
DC 1000V
+20%, -0%
1mA or more,
1.2mA or less
(at 1MΩ load)
0.0-99.9MΩ
100-999MΩ
1.00-9.99GΩ
10.0-99.9GΩ
100-999GΩ
DC 2500V
+20%, -0%
1mA or more,
1.2mA or less
(at 2.5MΩ load)
0.0-99.9MΩ
100-999MΩ
1.00-9.99GΩ
10.0-99.9GΩ
100-999GΩ
1.00-9.99TΩ
DC 5000V
+20%, -0%
1mA or more,
1.2mA or less
(at 5MΩ load)
±5%rdg
±3dgt
±20%rdg
(*1) 250V Range is for IRPI/DAR measurement only.
(*2) Measuring range goes to one lower range when the applied input drops to
80% or lower of the rating of the lower range. Measurement accuracy to be
applied is changed when the range goes to the lower range.
－ 6 －
<Voltage monitor for insulation resistance range>
Rated voltage 250V 500V 1000V 2500V 5000V Accuracy
Measuring
range
This monitor is used to check whether electrical charge stored on the equipment
under test is discharged or not. The measured voltage value displayed on the
LCD is a reference value.
Please be noted that the indicated value, when external AC voltage is applied to
the instrument, is not the correct value.
<Volt meter >
Volt
Frequency 45.0-65.0Hz(*1) 0.1Hz ±0.2Hz
(*1)When the measured voltage is less than 30V or DCV is measured, the
frequency is displayed as ----Hz on the LCD.
<Ammeter (Output Current)>
Measuring range Accuracy
0.00nA～5.50mA
(*1) If result of resistance measurement is 10MΩ or more, output current is
determined by resistance and voltage.(Accuracy is derived from measured
resistance specification and measured voltage specification)
<Capacity meter>
Rated voltage Measuring range Accuracy
250V 〜 2500V range 5.0nF 〜 50.0μF
5000V range 5.0nF 〜 25.0μF
【Calculated Value】
PI,DAR,DD
Measurement Mode Display range Computational error
30-330V 30-650V 30-1200V 30-3000V 30-6000V ±10%rdg±20V
(resolution 10V)
Measuring range Resolution Accuracy
DC voltage:±30 - ±600V
AC voltage: 30 - 600V
(50/60Hz)
1V ±2%rdg±3dgt
±10%rdg(*1)
±5%rdg±5dgt
PI 0.00 〜 9.99 ±2dgt
DAR 0.00 〜 9.99 ±2dgt
DD 0.00 〜 9.99 ±2dgt
－ 7 －
●Display: Liquid crystal display
Bar graph: Max. 41points
DAR/PI value: 9.99
Time: 99:59
●Low battery warning: Battery mark display (in 4 levels)
●Overrange indication: OL mark appears at insulation resistance
range and Hi mark at voltage range.
●Auto-ranging: Range shifts to upper range : 1000 counts
Range shifts to lower range : 80 counts
(Only at the insulation resistance range)
●Auto-power-off: Power off function operates in 10 min. after
the last switch operation.
●Used location: altitude 2000 m or less
●Temperature & humidity range (guaranteed accuracy):
23ºC±5ºC/Relative humidity 85% or less
(no condensation)
●Operating temperature & humidity range:
0ºC to 40ºC/Relative humidity 85% or less
(no condensation)
●Storage temperature & humidity range:
-20ºC to +60ºC/Relative humidity 75% or less
(no condensation)
●Overload protection: Insulation resistance range: AC1200V/10sec.
Voltage range: AC720V/10sec.
●Withstand voltage: AC6720V(50/60Hz)/5sec.
(Between electrical circuit and enclosure)
●Insulation resistance: 1000MΩ or more/DC1000V
(Between electrical circuit and enclosure)
●Dimension: 208(L)×225(W)×130(D)mm
(Hard case 380(L)×430(W)×154(D)mm)
●Weight: 4kg approx. (including battery)
Total 8kg approx. (including accessories)
●Power source: Rechargeable battery
12V5Ah Lead acid batteries (PXL12050) or equivalent.
●Power Adapter Output:DC15V(15VA)
for recharging Input:100-240V 50/60Hz
－ 8 －
●Current consumption (representative values at 12V of supply voltage)
Range 250V 500V 1000V 2500V 5000V VOLT
Output at
short-circuit
When rated
measuring current
is outputted
Output at
open circuit
On stand-by 30mA
When backlight
is on
Note) Current values in above table are all approximate values.
●Operating time: approx. 10 hours continuous
- under a load of 100MΩ at 5000V Insulation resistance range
●Accessories: Line probe: MODEL7165A
(Including MODEL8255 Straight type prod with molded parts)
Earth cord: MODEL7224A
Guard cord: MODEL7225A
Hard Case MODEL9171
Pickel Type Prod: MODEL8019
Straight Type Prod: MODEL8254
Instruction manual
Power Adapter
For 10 sec after a test is started : 700mA,
after that : 180mA
380mA
/0.25MΩ
60mA 60mA 70mA 90mA 140mA
440mA
/0.5MΩ
510mA
/1MΩ
Increased by 30mA
670mA
/2.5MΩ
860mA
/5MΩ
110mA
●Optional accessories: USB Communication set:MODEL8258
(USB adaptor(MODEL8212USB) with KEW Windows for
3127)
Adaptor for recorder:MODEL8302
Line probe with alligator clip:MODEL7168A
Long Line probe with alligator clip (15m): MODEL7253
－ 9 －
191817
9
101112
13
14
15
16
20
4. Instrument layout
4-1 Instrument layout
1
2
3
4
5
6
7
8
1 LCD display
2 MEMORY button
3 ENTER button
4 MODE button
5 ESC button
6 UP/DOWN button
7 FILTER button
8 TEST button
9 Backlight button
10 Range switch
11 Earth terminal
12 Guard terminal
13 Line terminal
14 Communication port
(for MODEL8212USB)
15 Shutter
16 Power adapter terminal
17 Earth cord (black)
18 Guard cord (green)
19 Line probe (red)
20 Power adapter
－ 10 －
4-2 LCD display
16
12
15
17
18
11
101314
1
2
3
4
5
6
7
8
9
1 Battery mark
2 Overheat warning mark
3 AC/DC mark
4 LOGGING mark
5 MEMORY mark
6 FILTER mark
7 Date and time mark
8 Time
9 DAR/PI/DD/Break down/Frequency value
10 Voltage warning mark
11 Bar graph
12 MODE mark
13 USB mark(for MODEL8212USB)
14 Bluetooth mark
15 Output voltage
16 Insulation resistance
17 Unit
18 Capacitance / Output current value
－ 11 －
4-3 Opening and closing Hard case
Handles
The Latching device has two features: the larger portion which is the latch itself ①,
and the small latch release tab ② at the bottom of the latch.
1. To open, pull up the latch release tab
② in the direction of the arrow.
2. To close, lower the latch ① and press
until it snaps.
Never press the latch release tab ②
to close the latch as damage may result.
4-4 Taking out KEW3127 from the Hard case.
Grip the handles and pull upward to take out KEW3127 from the Hard case.
②
①
－ 12 －
5. Preparation for measurement
It is recommended to charge the battery with reference to 10.1 How to charge
battery described in the manual before stating to use with the instrument since
the battery voltage may be low due to self-discharge.
5-1 Checking the battery voltage
(1) Set the Range switch to any position other thanOFF.
(2)
When the battery mark shown at the upper left on the LCD is last 1 level ,
the batteries are almost exhausted.
Charge battery to perform further measurements.
The instrument operates properly even in such a low battery power condition
and it may not affect the accuracy.
When battery mark is empty , the battery voltage is below the lower limit
of the operating voltage. In such a condition, the accuracy isnt guaranteed.
Refer to10.1 How to charge battery and charge battery.
5-2 Connecting test leads
Insert the test lead firmly to the connector terminal on the instrument. Connect the
Line Probe(red) to the Line terminal, the Earth Cord(black) to the Earth terminal
and the Guard Cord(green) to the Guard terminal. (To establish guard is not
necessary, you do not have to connect the Guard cord.)
# DANGER
● Do not press the TEST button when the Range switch is at any position other
than OFF. High voltages are applied to the test leads and you may get
electrical shocks.
－ 13 －
6. Measurement
6-1 Mains disconnection check (Voltage measurement)
# DANGER
● Do not make measurement on a circuit in which the electric potential
exceeds 600V (voltage to ground) in order to avoid getting electrical shock.
In addition, do not use this instrument when the voltage to ground is 600V or
higher even the line voltage is 600V or less.
● Ensure that a measurement is performed at the secondary side of the circuit
breaker when testing the voltages of power lines, which has a large current
capacity, in order to avoid possible hazard to the user.
● Extra precaution shall be taken to minimize the possibility of shorting the
power line with the metal tip of test lead at voltage measurement. It may
cause personal injury.
● Do not start a measurement with the battery cover removed.
● Connect the Earth cord (black) to the Earth terminal of the circuit under test.
Set the Rage switch to any position other thanOFFposition.
Press the MODE button(
No need to press the Test button.
KEW3127 has an AC/DC auto-detect circuit and can measure DC voltage as well.
At DC voltage measurement, when applying positive voltage to the Line Probe
(red), positive value is displayed on the LCD.
) and selectVOLT mode.
Ensure that the circuit breaker of the circuit under test is turned off.
(1) Connect the Earth Cord (black) to the earth side of the circuit under test and
the Line Probe (red) to the line side respectively.
(2) Confirm that the voltage displayed on the LCD is Lo. If the display doesnt
show Lo, voltage is applied on the circuit under test. Check the circuit
under test again and turn off the circuit breaker.
－ 14 －
6-2 Insulation resistance measurement
# DANGER
● Confi rm that no electrical charge exists on the circuit under test before
measuring by using a high voltage detector.
● Put on a pair of insulated gloves for high voltage.
● In case the Range switch is set to Insulation resistance range, high voltage
is being applied to the tips of test leads and to the circuit under test
continuously while the Test button is kept pressed down. Be extremely
careful not to get electric shock.
● Do not start measurement with the battery cover removed.
● Never start measurement when thunder rumbling.
● Connect the Earth Cord (black) to the earth terminal of the circuit under test.
● When any mode other than VOLT mode is selected, live circuit warning
symbol appears on the LCD and the audible warning activates when a
voltage of 30V or higher is measured.
KEW3127 doesnt start a test, even the Test button is pressed down, if the
measuring voltage is 160V or higher: it starts a test if the measuring voltage
is under 160V upon a press of the Test button.
Prior to testing, ensure that the equipment under test is disconnected from
the mains supply and not energized in order to avoid possible electrical
hazards. This instrument may start a measurement for energized electrical
circuits. Be extremely careful not to get electrical shock.
－ 15 －
Loading...