INSULATION TESTER IR4056-20, IR4057-20 Field Measuring Instruments 5-range INSULATION & CONTINUITY CAT Ⅲ 600V IEC/EN 61557 AC/DC automatic detection range Model IR4056- 20 with Bar Graph QUICK & EASY Comparator Function Improves Work Efciency • Identify the Insulation and Low Resistance Conditions with the PASS/FAIL Icon • FAIL Alert with Red LCD and Audio Buzzer Stable Digital Readings are Easy to Read Model IR4057- 20

2 Efcient, Safe Measurement with Digital Insulation Resistance Testers Solar Power Hybrid Electric Vehicles Periodic Inspection Electric Vehicles Comparator function provides PASS/FAIL decisions at a glance The comparator function compares measured values to pre-set reference values to generate a pass or fail judgment. (Can be used with insulation resistance measurement and low-resistance measurement.) The stable display is easy to read, increasing work efficiency. Instant judgment Identify PASS/FAIL using light and sound Since the IR4056-20 and IR4057-20 generate judgments as soon as the test...

3 Designed for safety and peace of mind Featuring improved convenience and ease of use Integrated hard case with sliding cover DROP PROOF Testers are built tough to withstand a 1-meter drop onto a concrete oor With cover closed AC/DC voltage measurement (With AC/DC automatic detection function) Test Lead L9787 Use as a tester replacement thanks to DC voltage measurement functionality, which is useful in applications involving solar power and electric vehicles (EVs). Connect either the test probe or alligator clip for the earth side Easy-to-see LCD An FSTN LCD ensures the instrument’s display...

4 Specifications Guaranteed accuracy period: 1 year, Accuracy guarantee for temperature and humidity: 23°C±5°C (73°F ±9°F) and 90% RH Insulation Resistance Measurement Rated output voltage (DC) 50V 125V 250V 500V 1000V 100 MW 250 MW 500 MW 2000 MW 4000 MW Effective maximum indicated value 2 MW 5 MW 10 MW 50 MW 100 MW Effective medium value 1st effective measuring range [MW] 0.200 to 10.00 0.200 to 25.0 0.200 to 50.0 0.200 to 500 0.200 to 1000 ±4 % rdg. Accuracy 50.1 to 500 501 to 2000 1010 to 4000 2st effective measuring range [MW] 10.1 to 100.0 25.1 to 250 ±8 % rdg. Accuracy 0 to 0.199 Other...