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KYORITSU
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3126
User Manual
28 pgs2.08 Mb0
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KYORITSU 3126 User Manual

INSTRUCTION MANUAL
4-range High voltage insulation resistance tester
KEW 3126

Contents

1. Safety warnings ·········································································· 1
2. Feature ······················································································· 5
3. Specification ··············································································· 6
4. Instrument layout 4-1 Instrument layout ·································································· 9 4-2 LCD display ········································································ 10
5. Preparation for measurement 5-1 Checking the battery voltage ·············································· 11 5-2 Connecting test leads ························································· 11
7. Battery replacement ································································· 23
8. Accessories 8-1 Metal part for Line Probe, and replacement ······················· 24 8-2 How to use the adaptor for recorder ·································· 25 8-3 Line probe with alligator clip ··············································· 25

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 # 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.
 1 
 2 
DANGER
#
● Never make measurement on the circuit in which electrical
potential to ground over 600V exists.
● Do not a tte mpt to make m eas ure men t in t he 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 input s exce e d i n g th e max i m u m al l o w able
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 i ns tall substitut e parts or mak e any modificat io n to
the instrument. Return the instrument to your local Kyoritsu
distributor for repair or re-calibration.
● Do not try to repl a c e th e ba t t eries if the surfa c e 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.
 3 
CAUTION
#
● Always make sure to set the Range switch to the appropriate
position before making a measurement.
● Set th e Range Sw i t c h to “O F F ” position af t e r use an d
disconnect the test leads from the instrument. Remove the
batteries if the instrument is to be stored and will not be used for
a long period.
● Do not exp o s e th e in s t rume n t to th e di r e c t su n , hi g h
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 measure-
ment 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.
 4 
○ Measurement categories(Over-voltage categories)
To ensure safe operation of measuring instruments, IEC 61010 establishes safety standards for various electrical environments, categorized as CAT I 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 CATII.
CAT I : Secondary electrical circuits connected to an AC
electrical outlet through a transformer or similar device.
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).
 5 

2. Feature

KEW3126 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 61010-031 (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 DAR (Dielectric Absorption
Ratio) and PI (Polarization Index)
● 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.
 6 

3. Specification

● Applicable standards
IEC 61010-1 Measurement CAT.III 600V Pollution degree2 IEC 61010-031 Standard for hand-held probes MODEL7165A(CAT.III 600V) MODEL7224A(CAT.IV 600V) MODEL7225A(CAT.IV 600V) *
IEC 61326-2-2 EMC standard IEC 60529 IP40
● Measuring range and accuracy
(Temperature, humidity: 23±5Cº, 45 − 75%RH) <Insulation resistance tester>
Rated voltage 500V 1000V 2500V 5000V
Measuring Range
Open circuit Voltage
Rated Current
Short-circuit current
Accuracy ±5%rdg±3dgt
Voltage monitor for insulation resistance range 30−6000V (resolution 10V): ±10%rdg±20V
When KEW3126 and the test lead are combined and used together, whichever is lower category either of them belong to is applied.
0.0
99.9MΩ
−
100
−
DC 500V +30%, -0% 1mA or more,
1.2mA or less
(at 0.5MΩ load)
For 10 sec after a test is started : max 5mA, after that : 1.4mA
999MΩ
0.0
99.9MΩ
−
100
999MΩ
−
1.00
1.99GΩ
−
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
−
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
1000GΩ
−
DC 5000V +20%, -0% 1mA or more,
1.2mA or less
(at 5MΩ load)
100GΩ or more,
±20%rdg
 7 
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.
<Voltmeter>
DC voltage AC voltage
Measuring range ±30−±600V 30−600V(50/60Hz)
Resolution 1V
Accuracy ±2%rdg±3dgt
●Display: Liquid crystal display
Insulation resistance range: Max.999 counts
(1000 counts only at 1TΩ display)
V range: Max. 630 counts Bar graph : Max. 36 points DAR/PI value : 9.99 Time: 60:00
●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)
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