Related Manuals for Kyoritsu Electrical Instruments Works, Ltd. KEW3121B
Summary of Contents for Kyoritsu Electrical Instruments Works, Ltd. KEW3121B
- Page 1 Instruction manual High voltage insulation resistance tester KEW3121B / 3122B 1.800.561.8187 information@itm.com www. .com...
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Page 2: Table Of Contents
Contents 1. Safety warnings ..............1 2. Features ................5 3. Specification ................ 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 ........... -
Page 3: Safety Warnings
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. - Page 4 # 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 flammable gasses.
- Page 5 # CAUTION ● Before starting a measurement, confirm 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.
- Page 6 ○ 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.
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Page 7: Features
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 ●... -
Page 8: Specification
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... - Page 9 ●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)
- Page 10 ●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...
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Page 11: Instrument Layout
4. Instrument layout 1 Line terminal 2 Guard terminal 3 Earth terminal 4 LED for high & low range indication 5 PRESS TO TEST button 6 Function switch 7 Meter movement zero adjust 8 Guard cord (green) 9 Earth cord (black) 10 Line probe −... -
Page 12: Getting Started
5. Getting started # DANGER ● Be careful. High voltage may present across LINE and EARTH terminals of the instrument when the PRESS TO TEST button is operated. Make sure to connect the Earth terminals of the circuit under test and of this instrument to earth. -
Page 13: Measurement
6. Measurement 6-1 Insulation resistance measurement # DANGER ● Use a high voltage detector and confirm that there is no electrical charge in the circuit under test. ● Wear a pair of insulated gloves for high voltage. ● If the Function switch is at the insulation resistance range and the Test button is being pressed down, high voltages are generated and applied to the test leads and the circuit under test continuously. - Page 14 (1) Check the voltage which can be applied to the circuit under test, and set the Function switch to a desired insulation resistance range. (2) Connect the Earth cord (black) to the Earth terminal of the circuit under test. (3) Place the tip of the Line probe (red) to the circuit under test. Then press the “PRESS TO TEST”...
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Page 15: Continuous Measurement
# DANGER ● Be extremely careful not to get electric shock as a high voltage is present on the tip of the test leads continuously. 6-3 Voltage characteristics at measuring terminal KEW3121B/ 3122B Output characteristics 6000 KEW3122B/ 5000 5000V... -
Page 16: Use Of Guard Terminal
6-4 Use of Guard terminal When measuring the insulation resistance of a cable, leakage current flowing on the surface of cable jacket and the current flowing inside the insulator are mixed and may cause error in insulation resistance value. In order to prevent such error, wind a conductive wire around the point where leakage current flows. -
Page 17: Battery Replacement
7. Battery replacement # DANGER ● Do not open the Battery compartment cover if the surface of the instrument is wet. ● Never open the Battery compartment cover during a measurement. To avoid electric shock, power off the instrument and disconnect the test leads from the instrument when replacing batteries. -
Page 18: How To Remove The Hard Case
8. How to remove the Hard case Hold the side surface of the terminal part, and gently pull the unit toward the front. 1. Hold the side surface of the terminal part. 2. Pull the unit toward the front. − 16 − 1.800.561.8187 information@itm.com www. -
Page 19: Cleaning Meter Cover
9. Cleaning Meter Cover This instrument is managed by our company's quality standard and is delivered in the best condition after passed the inspection. But in the dry time of winter static electricity sometimes builds up on the meter cover due to the characteristic of plastic. When static electricity builds up on the meter cover and affects the meter reading, use a cloth dampened with off-the-shelf anti- static agent or detergent to wipe the meter cover surface. -
Page 20: Accessories
10. Accessories 10-1 Metal parts for Line Probe, and replacement # DANGER Attach MODEL8255 to the test leads to use the instrument in CAT II or higher environments. MODEL8254 and 8019 have exposed large metal parts, therefore, they may short circuit or damage the objects under test, cause fire or pose fatal or serious injuries to the users. -
Page 21: How To Use The Adaptor For Recorder
10-2 How to use the adaptor for recorder MODEL8324 is an adaptor for a recorder (option) for output current measurement. Connect it as shown in the below figure. Output is DC10mV when current of 1μA is flowing. To shield To recorder or Earth －... -
Page 22: Disposing The Product
11. Disposing the Product Waste Electrical and Electronic Equipment (WEEE), Directive 2002/96/EC This Product complies with the WEEE Directive (2002/96/EC) marking requirement. The affixed product label (see below) indicates that you must not discard this electrical/electronic product in domestic household waste. Product Category With reference to the equipment types in the WEEE directive Annex 1, this product is classified as a “Monitoring and Control... - Page 23 MEMO − 21 − 1.800.561.8187 information@itm.com www. .com...
- Page 24 DISTRIBUTOR Kyoritsu reserves the rights to change specifications or designs described in this manual without notice and without obligations. 03-15 92-2236 1.800.561.8187 information@itm.com www. .com...
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