• 5 레인지 절연 저항계(50 V/100 MΩ ~ 1000 V/4000 MΩ)
• 안정적인 고속의 측정속도, 콤퍼레이터 양불판정 응답 시간 0.3 초
• 콘크리트에 1m 자유낙하에도 견디는 내충격 설계
• 어두운 현장에서 유용한 고휘도 백색 LED 조명(L9788-11 or L9788-10 별매시 사용가능)
• 200mA 의한 도통 체크 기능
• AC/DC 전압계가 내장되어 있어 태양광발전 및 전기자동차 등에 유용함.
• IR4057-20 모델과 동일한 사양

Basic specifications (Accuracy guaranteed for 1 year)

Testing voltage	50V DC	125V DC	250V DC	500V DC	1000V DC
Effective maximum indicated value	100 MΩ	250 MΩ	500 MΩ	2000 MΩ	4000 MΩ
Accuracy 1st effective measuring range MΩ	±4% rdg. 0.200 - 10.00	±4% rdg. 0.200 - 25.0	±4% rdg. 0.200 - 50.0	±4% rdg. 0.200 - 500	±4% rdg. 0.200 - 1000
Lower limit resistance	0.05 MΩ	0.125 MΩ	0.25 MΩ	0.5 MΩ	1 MΩ
Overload protection	AC 600 V (10s)				AC 1200 V (10s

DC voltage measurement	4.2V (0.001V resolution) to 600V (1V resolution), 4 ranges, Accuracy: ±1.3% rdg. ±4 dgt., Input resistance: 100 kΩ or higher
AC voltage measurement	420V (0.1V resolution) / 600V (1V resolution), 2 ranges, 50/60 Hz, Accuracy: ±2.3% rdg. ±8 dgt., Input resistance: 100 kΩ or higher, Average rectifier
Low resistance measurement	For checking the continuity of ground wiring, 10 Ω (0.01 Ω resolution) to 1000 Ω (1 Ω resolution), 3 ranges, Basic accuracy: ±3 % rdg. ±2 dgt., testing current 200 mA or more (at 6 Ω or less)
Display	Semi-transmissive FSTN LCD with back lighting, bar-graph indicator
Response time	Approx. 0.3 second for PASS/FAIL decision (at HIOKI's conditions)
Other functions	Indicate MΩ measurement value after a lapse of one minute, Live circuit indicator, Automatic electric discharge, Automatic DC/AC detection, Comparator, Drop proof, Auto power save
Power supply	LR6 (AA) alkaline batteries × 4 Continuous use: 20 hours (at HIOKI’s conditions) Number of measurements: 1000 times (at 5 s ON, 25 s OFF cycle, insulation measure of lower limit resistance value to maintain nominal output voltage)
Dimensions, mass	159 mm (6.26 in) W × 177 mm (6.97 in) H× 53 mm (2.09 in) D, 640 g (22.6 oz) (including batteries, excluding test leads)
Supplied accessories	TEST LEAD L9787 ×1, Neck strap ×1, Instruction Manual ×1, LR6 (AA) alkaline batteries ×4