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Ground Resistance Testers Models 6422 & 6424
3. SPECIFICATIONS
3.1 GENERAL REFERENCE CONDITIONS
Quantity of influence
Reference values
Temperature
73 ± 3.6 °F (23 ± 2 °C)
Relative humidity
(45 to 75) % RH
Supply voltage
Model 6422: 8 ± 0.2 V
Model 6424: 6 ± 0.2 V
Frequency
(45 to 65) Hz
Electric field
< 0.1 V/m
Magnetic field
< 40 A/m
Intrinsic uncertainty
is the error defined under the reference conditions.
Operating uncertainty
includes the intrinsic uncertainty plus the effects of
variation of the quantities of influence (supply voltage, temperature, interference,
etc.) as defined in standard IEC 61557-5.
The uncertainties are expressed in % of the reading (R) and in number of display
cts: ± (a % R + b ct).
NOTE:
The Model 6424 cannot make measurements when the
battery charger is connected..
3.2 ELECTRICAL SPECIFICATIONS
3.2.1 Voltage Measurement (Model 6424) (V/A)
Additional reference condition:
Peak factor = √2
Voltage Measurement
Measurement range
0.1 – 600.0 V
Resolution
0.1 V
Intrinsic uncertainty
± (1 % R + 1 ct)
For voltage above 700 V
AC
the meter displays
>700.0 V
.
Input impedance: 1.3 MΩ
