Description
Hioki insulation testers or megohmmeters feature all-in-one designs including built-in rugged cases and test lead storage compartments. The IR4057-20 is a 5-range, 50V to 1000V digital insulation resistance tester with bargraph, and delivers efficient functions and features to help shorten work time associated with field insulation testing. Insulation Tester IR4057
Key Features
• 5-range testing voltage of 50 V/100 MΩ to 1000 V/4000 MΩ
• Digital bar graph • Stable & high-speed digital readings, 0.3 second response time for PASS/ FAIL decisions
• 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
Model No. (Order Code)
| IR4057-20 | with bar graph display |
|---|
Product Video
■ Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)
|
Rated output voltage |
50 VDC |
125 VDC |
250 VDC |
500 VDC |
1000 VDC |
|---|---|---|---|---|---|
|
Effective maximum indicated value |
100 MΩ |
250 MΩ |
500 MΩ |
2000 MΩ |
4000 MΩ |
|
Accuracy 1st effective measuring range MΩ |
±2 % rdg. ±2 dgt. |
±2 % rdg. ±2 dgt. |
±2 % rdg. ±2 dgt. |
±2 % rdg. ±2 dgt. |
±2 % rdg. ±2 dgt. |
|
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 |
4.2 V (0.001 V resolution) to 600 V (1 V resolution), 4 ranges, |
||||
|
AC voltage measurement |
420 V (0.1 V resolution) / 600 V (1 V resolution), 2 ranges, 50/60 Hz, |
||||
|
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) Insulation Tester IR4057 |
||||
|
Display |
Semi-transmissive FSTN LCD with back lighting, bar-graph indicator |
||||
|
Response time |
Approx. 0.3 second for PASS/FAIL decision (based on in-house testing) |
||||
|
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 (based on in-house testing) |
||||
|
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 |
Test Lead L9787 ×1, Neck strap ×1, Instruction manual ×1, LR6 (AA) alkaline batteries ×4 |
||||
