The Hioki IR4053 is a digital insulation resistance tester for photovoltaic generation systems. Measure insulation resistance accurate and safely without being affected by generated solar power and identify the value in just 4 seconds. CAT III 600 V Key Features • Safely and accurately measure PV insulation resistance even while generating solar power • Built-in PV dedicated function, display measurements in 4 seconds • Five ranges (50/125/250/500/1000V) built in for normal insulation resistance measurement • Built-in 1000 VDC voltage measurement for open voltage tests of PV systems that support 1000 V • Built-in comparator function • Drop proof design withstands drop onto concrete from a height of 1 meter
Rated output voltage
500 V DC
1000 V DC
Effective maximum indicated value
2000 MΩ
4000 MΩ
Measuring range/ Accuracy
0.200 to 500 MΩ / ±4% rdg.
501 to 2000 MΩ / ±8% rdg.
0.200 to 1000 MΩ / ±4% rdg.
1010 to 4000 MΩ / ±8% rdg.
Other measuring range / Accuracy
0 to 0.199 MΩ / ±2% rdg. ±6 dgt.
Basic specifications â– Insulation resistance measurement
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
±4% rdg.
0.200 to 10.00
±4% rdg.
0.200 to 25.0
±4% rdg.
0.200 to 50.0
±4% rdg.
0.200 to 500
±4% rdg.
0.200 to 1000
Lower limit resistance
0.05 MΩ
0.125 MΩ
0.25 MΩ
0.5 MΩ
1 MΩ
Overload protection
600 V AC (10 s)
600 V AC (10 s)
600 V AC (10 s)
600 V AC (10 s)
1200 V DC (10 s)
DC voltage measurement
4.2 V (0.001 V resolution) to 1000 V (1 V resolution), 4 ranges,
Accuracy: ±1.3% rdg. ±4 dgt., (Ranges in excess of 1000 V are not guaranteed for accuracy.)
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., (Ranges in excess of 600 V are not guaranteed for accuracy.)
Display
Semi-transmissive FSTN LCD with back lighting, Backlight
Response time
Insulation resistance range: 1 second, PVΩ function: 4 seconds (based on in-house tests)
Other functions
Live circuit indicator, automatic electric discharge, automatic DC/AC detection, comparator, drop proof, auto power save
Power supply
AA alkaline batteries (LR6) ×4, Continuous operating time: Approx. 20 hours (based on in-house tests)
Dimensions and mass
159 mm (6.26 in) W × 177 mm H (6.97 in) H × 53 mm (2.09 in) D, Approx. 600 g (21.2 oz) (including batteries, excluding test lead)
Accessories
TEST LEAD L9787 ×1, Neck strap ×1, Instruction manual ×1, AA alkaline batteries (LR6) ×4
