Megger BM21 - Specification; Test Voltages and Ranges; Accuracy and Performance

Test Voltages (d.c.): 500 V, 1000 V, 2500 V & 5000 V
BM21 only; 50 to 5000 V variable in 25 V steps
Accuracy (0 °C to + 30 °C): ±5% of nominal test voltages (load resistance >100 MΩ)
Insulation Range: 100 kΩ to 1 TΩ analogue
BM11D: 10 kΩ to 500 GΩ digital
BM21: 10 kΩ to 5 TΩ digital
Accuracy (0 °C to + 30 °C): BM11D:±5% 1 MΩ to 100 GΩ at 5 kV
±5% 1 MΩ to 10 GΩ at 500 V
±20% outside these limits (above 100 kΩ)
BM21:±5% 1 MΩ to 1TΩ at 5 kV
±5% 1 MΩ to 100 GΩ at 500 V
±5% 1 MΩ to 10 GΩ at 50 V
±20% outside these limits (above 100 kΩ)
For extended temperature range -20°C to + 50°C the percentage error doubles
Short Circuit Current: 2
mA nominal
17
Specification
Resistance under test (Ω)
BM11D/21 Specification 1/6/00 11:05 am Page 1