20
Megohmmeter Model 6505 - User Manual
4. SPECIFICATIONS
4.1 REFERENCE CONDITIONS
Influence Quantity
Reference Values
Temperature
23 ± 3 °C
Relative humidity
(45 to 55) % RH
Supply voltage
(9 to 12) V
Frequency range
DC and (15.3 to 65) Hz
Capacity in parallel on resistor
0 µF
Electrical field
nil
Magnetic field
< 40 A/m
4.2 VOLTAGE
Measurement
Range
1.0 to 99.9 V 100 to 999 V 1000 to 2500 V 2501 to 5100 V
Frequency
Range*
DC and (15 to 500) Hz
DC
Resolution
0.1 V
1 V
2 V
2 V
Accuracy
1 % of
Reading ±
5 cts
1 % of Reading ± 3 cts
Input
Impedance
750 kΩ at 3 MΩ depending on measurement voltage
*Over 500 Hz, the small display will indicate “- - - -”, and the main display will give
an assessment of the measured voltage’s peak value only.
4.3 INSULATION RESISTANCE
Method:
Voltage-current method according to EN 61557-2 (ed. 02/97)
Nominal Output Voltage:
500, 1000, 2500, 5000 V
DC
(or adjustable from 40 V to 5100 V)
Adjustments Available in Variable Mode:
10 V from (40 to 1000) V
100 V from (1000 to 5100) V
Nominal Current:
> 1 mA
DC
Short-circuit Current:
< 1.6 mA ± 5 %
Load Current:
3 mA
D C
approx when starting measurement
Max. Acceptable Voltage:
Upeak = 0.4 Un
