| 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 range |
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 range |
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 range |
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 (based on in-house testing)
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, 640 g (22.6 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 |