Related Manuals for KYORITSU KEW 3121A
Summary of Contents for KYORITSU KEW 3121A
- Page 1 INSTRUCTION MANUAL KEW3121A, 3122A KEW3123A HIGH VOLTAGE INSULATION TESTER KEW 3121A, 3122A, 3123A...
-
Page 3: Table Of Contents
CONTENTS Page 1．Safety warnings …………………………………………………1 2．Features …………………………………………………………2 3．Specifications ………………………………………………3 ∼ 4 4．Instrument Layout ………………………………………………5 5．Operating Instructions …………………………………………6 5-1．Mechanical Zero Adjustment ……………………………6 5-2．Battery Check ……………………………………………6 5-3．Insulation Resistance Measurement ……………………7 5-4．Continuous Measurement ………………………………7 5-5．Use of Guard Terminal ……………………………………8 6．Battery Replacement ……………………………………………9 7．Accessories and options ………………………………………9 ... -
Page 4: 1．Safety Warnings
1. Safety warnings Please read through these operating instructions before using the instrument to avoid any dangers such as electrical shock and to ensure safe operation of the instrument. Pay particular attention to all WARNING and CAUTION in this instruction manual. WARNING indicates warnings to avoid electrical shock and CAUTION indicates cautions to avoid damage to the instrument. -
Page 5: 2．Features
2. Features ● Battery powered, the instruments test insulation up to 100000MΩ at 2500V for KEW 3121A, 200000MΩ at 5000V for KEW 3122A and 200GΩ at 5000V and 400GΩ at 10000V for KEW 3123A. ● Suited for heavy duty electrical maintenance and servicing of industrial installations, cables, transformers, generators and switchgear where high voltage insulation tests are required. -
Page 6: 3．Specifications
3. Specifications KEW 3121A DC Test Voltage 2500V 5000 0∼2000MΩ/ 0∼5000 M Measuring Ranges 1000∼100000MΩ 2000∼ 20 （automatic change） (automatic ch ±5% of reading ±5% of re （200∼ 10 （100∼50000MΩ） ±10% of reading ±10% of re or 0.5% of scale length or 0.5% of sc... - Page 7 3122A KEW 3123A 5000V 10000V 00 MΩ/ 0∼5GΩ/2∼200GΩ 0∼10GΩ/4∼400GΩ ∼ 200000MΩ (automatic change) (automatic change) tic change) of reading ±5% of reading ±5% of reading ∼ 100000MΩ） （0.2∼100GΩ） （0.4∼200GΩ） of reading ±10% of reading ±10% of reading of scale length or 0.5% of scale length or 0.5% of scale length es other than...
-
Page 8: 4．Instrument Layout
4. Instrument Layout ③ ② ① ④ ④ ⑦ ⑧ ⑥ ⑤ ① Line Terminal ⑪ ⑩ ⑨ ② Guard Terminal ③ Earth Terminal ④ LED's for High & Low Range Indication ⑤ Press to Test Button ⑥ Function Switch ⑦... -
Page 9: 5．Operating Instructions
5. Operating Instructions CAUTION: BE CAREFUL ABOUT HIGH VOLTAGE PRESENT ACROSS LINE AND EARTH TERMINALS OF INSTRUMENT WHEN PRESS TO TEST BUTTON IS OPERATED. MAKE SURE TO EARTH CIRCUIT UNDER TEST. ALWAYS CONNECT EARTH TERMINAL OF INSTRUMENT TO EARTH. THE BUZZER WILL KEEP SOUNDING DURING INSULATION RESISTANCE MEASUREMENT. -
Page 10: Insulation Resistance Measurement
With the function switch set at 2500V and 5000V for KEW 3121A and 3122A or 5000V or 10000V for KEW 3123A, connect the black earth code to the earth terminal (EARTH) and place the line probe in contact with the circuit under test and press the Test button. -
Page 11: Use Of Guard Terminal
5-5. Use of Guard Terminal When measuring the insulation resistance of a cable, Ieakage 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 12: 6．Battery Replacement
6. Batttery Replacement Remove the battery compartment cover by loosening the screw located on the back of the housing case. Replace the whole battery pack. Alkaline batteries are recommended where the instrument is used at a temperature below the freezing point. The ordinary manganese batteries will deteriorate below the freezing point. -
Page 13: How To Use The Adaptor For Recorder
7-2. How to use the adaptor for recorder MODEL8324 is the adaptor for recorder for output current measurement. Connect it as shown in the below Fig.3. Output is DC10mV when current of 1μA is flowing． To recorder To shield or Earth Fig.3 −... -
Page 14: 8．How To Fix The Meter To The Hard Case
8. How to fix the Meter to the Hard case Please follow the instructions below to fix MODEL9159 main unit to MODEL9158 Hard case with Dual lock fastener. 1. Place a hard board beneath the Hard case. The board should be located under the fastener attached to the Hard case. -
Page 15: 9．Cleaning Meter Cover
9. Cleaning Meter Cover This earth tester 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. - Page 16 DISTRIBUTOR Kyoritsu reserves the rights to change specifications or designs described in this manual without notice and without obligations. 7-11 92-1919C...
Need help?
Do you have a question about the KEW 3121A and is the answer not in the manual?
Questions and answers