Kyoritsu 3131A User Manual

MODEL３１３１AANALOGUE INSULATION TESTERINSTRUCTION MANUALKYORITSU ELECTRICAL INSTRUMENTSWORKS，LTD., TOKYO JAPAN

―8―5-2 Mechanical Zero AdjustmentCheck that the pointer lines up with the middle of the mark on the scalecorrectly. If not, adjust it by rotating the

―9―6. Operation 6-1 Disconnection and check of power source of circuit under testDANGER● To avoid possible electrical shock, do not perform measuremen

―10―6-2 Insulation Resistance MeasurementDANGER● Always test the circuit or equipment to ensure it is surely de-energizedbefore measurement a

―11―DANGERDo not touch the circuit under test immediately after testing. Capacitancestored in the circuit may cause electric shock.Leave the

―12―Principle of Continuity Testing (Resistance Test)Resistance value can be obtained by applying a certain current to theresistance under test an

―13―7. Back Light Function To facilitate working at night or dimly lit situations, a back light function isprovided which illuminates the d

―14―8. Battery & Fuse Replacement 8-1 Battery Replacement① Disconnect the test probe from the instrument.② Open the battery compartment cover by

―15―9. Notes on Accessories 9-1 How to Fit Strap Belt and Test Probe PouchBy hanging the instrument around the neck, both hands can be usedfre

―16―10. Cleaning of the Instrument ◎ Cleaning the meter coverThis instrument is managed by our company's quality standard and isdelivered in the

―17―ＭＥＭＯ

Contents 1. Safety Precautions ... 12. Features ...

01-1292-1487ADISTRIBUTORKYORITSU ELECTRICALINSTRUMENTSWORKS, LTD．No.5-20, Nakane 2―chome, Meguro-ku,Tokyo, 152-0031 JapanPhone：（03）3723―0131Fax：（03）37

―1―1. Safety Precautions○ The instrument is designed and tested in accordance with the followingstandards and supplied in the best condition.・IE

―2―DANGER● Do not use this instrument on energized (LIVE) circuits.● Do not make measurement in the presence of flammable gasses.Otherwise, the use o

―3―2. FeaturesMODEL-3131A is an analogue insulation tester with five ranges for insulationresistance measurement and continuity testing (resistanc

―4―3. Specifications●Measuring Range and Accuracy(at 23±5°C, relative humidity 45-75%)Insulation Resistance Ranges:(IEC 61557-2)Nominal Output Voltage

―5―Typical Number of Measurements(central tendency for supply voltage up to6.5V)Insulation Resistance Ranges:1000V/400MΩ Range Approx. 500 times min.5

―6―4. Instrument Layout ①METER MOVEMENT ZERO ADJUST ②TEST BUTTON③SCALE PLATE ④LIVE CIRCUIT WARNING LED⑤POWER-ON INDICATION LED ⑥CONTINUITY ZERO ADJUST

―7―5. Preparation for Testing 5-1 Removing the CoverModel 3131A has a dedicated cover to protect against an impact fromthe outside and prevent the op