Specifications: 
Functional Specifications
Insulation Measurements
Resistance Range: 0.1Ω to 2000MΩ
Accuracy: ±1.25% f.s.

Measurement Accuracies
Nominal: 100V: +40%, -0%; 250, 500, 1000V: +30% -0%
Midscale: 4MΩ
Short Circuit Current: 1.9mA
Load Capacitance: 1µF w/ < ±0.1" pointer movement
Discharge: Up to 1µF capacitance is discharged from 1000V to < 42.4V in < 4 sec.

Voltage Test Measurements
Range: 100, 250, 500, 1000VDC
Resistance: 0.1 to 5000Ω
Open Circuit Test Voltage: 3V ±0.2V
Short Circuit Current 2mA ±10%
Accuracy: ±1.25% f.s.

General Specifications
Power Supply: Dual operation low voltage brushless a.c. generator or 120 V 50/60 Hz mains (line) supply
Battery life: not less than 1300 insulation or Resistance range test
Dimensions: 5.1 x 4.9 x 7" (130 x 125 x 180mm)
Weight: 2.3 lb (1 kg)