User manual SEFELEC 5x Series  25   v1.06 
 
Insulation resistance  
(SEFELEC 1000-M; SEFELEC 56/506-D/S) 
Measurement specifications 
Programmable volt per volt from 
(+) pole of the generator  
Dynamic stability for mains ΔV = ±10%: Variation of the 
voltage measured  
Maximum current in the measurement circuit: 
Maximum capacity of the sample measured 
< 100 µF (discharge time < 10 sec.) 
Resistance measurement range 
(Generator Utest/Umax) x 200 GΩ 
(or 2 TΩ) 
Display with indication of the units kΩ, MΩ, GΩ and TΩ 
Accuracy (in % of the reading, 1U = 1 point of display): 
Option - 2 TΩ and U <= 200 Vdc 
Option - 2 TΩ and U > 200 Vdc 
±(1% x U test / 100 + 1U) 
Precision mode NORMAL ± 100 kΩ