Hioki-IR4056-21 Insulation tester

Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)



Rated output voltage
50 V DC
125 V DC
250 V DC
500 V DC
1000 V DC


Effective maximum indicated value
100 MΩ
250 MΩ
500 MΩ
2000 MΩ
4000 MΩ


Accuracy 1st effective measuring range MΩ
±2 % rdg. ±2 dgt.0.200 - 10.00
±2 % rdg. ±2 dgt.0.200 - 25.0
±2 % rdg. ±2 dgt.0.200 - 50.0
±2 % rdg. ±2 dgt.0.200 - 500
±2 % rdg. ±2 dgt.0.200 - 1000


Lower limit resistance
0.05 MΩ
0.125 MΩ
0.25 MΩ
0.5 MΩ
1 MΩ


Overload protection
600 V AC (10s)
660 V AC (10s)


DC voltage measurement
4.2 V (0.001 V resolution) to 600 V (1 V resolution), 4 ranges, Accuracy: ±1.3 % rdg. ±4 dgt., Input resistance: 100 kΩ or higher


AC voltage measurement
420 V (0.1 V resolution) / 600 V (1 V 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. 0.8 second for PASS/FAIL decision (based on in-house testing)


Other functions
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 (Comparator off, backlight off, 500 V range, no load)Number of measurements: 1000 times (at 5 s ON, 25 s OFF cycle, insulation measurement of lower limit resistance value to maintain nominal output voltage)


Dimensions and mass
159 mm (6.26 in) W × 177 mm (6.97 in) H× 53 mm (2.09 in) D, 600 g (21.2 oz) (including batteries, excluding test leads)


Accessories
[IR4056-20] Test lead L9787 ×1, Neck strap ×1, Instruction manual ×1, LR6 (AA) alkaline batteries ×4[IR4056-21] Test lead set with remote switch L9788-11 ×1, Neck strap ×1, Instruction manual ×1, LR6 (AA) alkaline batteries ×4