INSULATION TESTER IR4057-20

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INSULATION TESTER IR4057-20

Quick response comparator offering reading stability in high-speed digital format

- 5-range testing voltage 50 V/100 MΩ to 1000 V/4000 MΩ
- Stable & high-speed digital readings, response time at PASS/FAIL decision 0.3 second
- Drop proof onto concrete from 1m (3.28 feet)
- Bright LED luminous LCD, Test lead with bright LED lamp to illuminate near hand (Option       L9788-11 or L9788-10)
- Continuity check via 200 mA testing
- Built in AC/DC voltage meter, useful for testing solar power generation systems and electric   vehicles

Basic Specification

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