KYORITSU KEW3121B User manual

KEW3121B/3122B
Instruction manual
High voltage insulation resistance tester
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Contents
1. Safety warnings ................................................................... 1
2. Features .............................................................................. 5
3. Specication ........................................................................ 6
4. Instrument layout ................................................................. 9
5. Getting started .................................................................. 10
5-1 Mechanical Zero Adjustment ....................................... 10
5-2 Battery Check .............................................................. 10
6. Measurement ..................................................................... 11
6-1 Insulation resistance measurement ............................. 11
6-2 Continuous measurement ........................................... 13
6-3 Voltage characteristics at measuring terminal ............. 13
6-4 Use of Guard terminal ................................................. 14
7. Battery replacement .......................................................... 15
8. How to remove the Hard case ........................................... 16
9. Cleaning Meter Cover ........................................................ 17
10. Accessories ..................................................................... 18
10-1 Metal parts for Line Probe, and replacement ........... 18
10-2 How to use the adaptor for recorder ......................... 19
10-3 Line probe with alligator clip(optional accessory) ..... 19
11. Disposing the Product ...................................................... 20
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−1 −
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
passing quality control tests. This instruction manual contains
warnings and safety rules which must be observed by the user
to ensure safe operation of the instrument and to maintain 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.
● 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 the 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 the 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 i s 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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−2 −
#DANGER
● Do not use this instrument to test the circuits in which 300V
or higher potentials exist in Measurement category IV (CAT
IV) environment or 600V or higher potentials exist in CAT III
environment.
● Do not attempt to make measurements in the presence of
ammable 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 a voltage. It may
cause personal injury.
● Do not exceed the maximum allowable input of any measuring
ranges.
● Do not press the Test button when connecting the test leads
to the instrument.
● Never open the Battery compartment cover during a
measurement.
● To prevent possible electrical shock, do not touch the circuit
under test during an insulation resistance measurement or
right after a measurement.
#WARNING
● Never attempt to make any measurements if any abnormal
conditions such as broken case and exposed metal parts are
noted.
● Do not rotate the Function switch with the test leads
connected to the object under test.
● Do not install substitute parts or make any modications 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.
● Insert the plug into the terminal rmly when using test leads.
● Ensure that the instrument is switched off before opening the
Battery compartment cover for battery replacement.
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−3 −
#CAUTION
● Before starting a measurement, conrm that the Function
switch is at an appropriate position.
● Set the Function switch to “OFF” position after use. 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 tempera-
tures and humidity or dew.
● Use a damp cloth with alcohol for cleaning the instrument
and the areas around the measuring terminals.
● When this instrument is wet, please store it after it dries.
Symbols
Danger of possible electric shock
Instrument with double or reinforced insulation
#User must refer to the manual
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.
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−4 −
○ 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).
O: Device which is
not directly
connected to the
mains power supply
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−5 −
2. Features
KEW3121B (2500V/100GΩ) and KEW3122B (5000V/200GΩ)
are battery-operated high voltage insulation testers.
● Designed to meet the following safety standards:
IEC 61010-1,-2-030 (CAT III 600V/CAT IV 300V Pollution
degree 2)
IEC 61010-031 (Requirements for hand-held probes)
● Suited for heavy duty electrical maintenance and servicing
ondustrial installations, cables, transformers, generators and
switchgear where high voltage insulation tests are required.
● Dual scales for low an d high ranges which change automatically.
Colour coded scales for easy reading plus LED's that illuminate
in matching colour.
● Hard carrying case furnished as standard accessory. Houses
both instrument and test leads in compact form. Made of
plastic, it is highly water resistant.
● Rated output voltage is maintained down to 0.1GΩ for
KEW3121B, 0.2GΩ for KEW 3122B. This permits accurate
measurements of low insulation resistance.
●
Audible high voltage warning at insulation resistance measurement
● Optional adapter MODEL8324 is available for connection to
recorder and enables cable insulation monitoring.(Option)
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−6 −
3. Specification
● Applicable standards
IEC 61010-1,-2-030
Measurement CAT III 600V Pollution degree2
Measurement CAT IV 300V Pollution degree2
IEC 61010-031 Standard for hand-held probes
MODEL7165A(CAT IV 600V)
MODEL7264(CAT IV 600V)
MODEL7265(CAT IV 600V)
* When KEW3121B/3122B and the test lead
are combined and used together, whichever
is lower category either of them belongs to is
applied.
IEC 61326-1,-2-2 EMC standard
IEC 60529 IP40
EN 50581 RoHS Directive
● Measuring range and accuracy
Model KEW3121B KEW3122B
Rated voltage 2500V 5000V
Measuring range 0 - 2GΩ/ 1 - 100GΩ
(Automatic change) 0 - 5GΩ/ 2 - 200GΩ (Automatic change)
Temperature:
23ºC±5ºC
First effective
measuring range
0.1 - 50GΩ 0.2 - 100GΩ
Accuracy ±5% of indicated value
Second effective
measuring range
Measuring ranges other than listed above , 0 and ∞
Accuracy ±10% of indicated value or 0.5% of scale length
Temperature:
-10ºC to +40ºC
First effective
measuring range
0.1 - 50GΩ 0.2 - 100GΩ
Accuracy ±10% of indicated value
Second effective
measuring range
Measuring ranges other than listed above , 0 and ∞
Accuracy ±20% of indicated value or 1.0% of scale length
Output voltage DC 2500V±5%
(0.1 - 50GΩ) DC 5000V±5% (0.2 - 100GΩ)
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−7 −
●Altitude : 2000m or less
●Temperature & humidity range(guaranteed accuracy)
:
23ºC±5ºC/Relative humidity 85% or less (no condensation)
●Operating temperature & humidity range
:
-10ºC 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: AC720V/10sec.
●Withstand voltage : AC5160V(50/60Hz)/ 5 sec.
(Between electrical circuit and enclosure)
●Insulation resistance : 1000MΩ or more/DC1000V
(Between electrical circuit and enclosure)
●Dimension : 177(L)×226(W)×100(D)mm
●Weight :
KEW3121B approx. 1.6kg (battery included)
KEW3122B approx. 1.7kg(battery included)
●Power source : DC12V LR14(Alkaline battery size C)x 8pcs
● Current consumption (representative values at supply voltage 12V)
Model KEW3121B KEW3122B
Rated voltage 2500V 5000V
Short-circuit current 65mA 82mA
Max. current
consumption
80mA
/50MΩ
100mA
/100MΩ
Output at
open circuit 70mA 85mA
●Measurement time : 3121B:approx. 55 hours
* under a load of 50MΩ on the Insulation
resistance 2500V range.
3122B:approx. 40hours
* under a load of 100MΩ on the Insulation
resistance 5000V range.
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−8 −
●Accessories : Line probe: MODEL 7165A
(Including MODEL8255 Straight type prod
with molded parts)
Earth cord: MODEL 7264
Guard cord: MODEL 7265
LR14(Alkaline battery size C)x 8pcs
Instruction manual
Hard Case: MODEL 9179
Pickel Type Prod: MODEL 8019
Straight Type Prod: MODEL 8254
●Optional : Adaptor for recorder:MODEL8324
accessories 3m Line probe with alligator clip: MODEL7168A
15m Line probe with alligator clip: MODEL7253
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