AEMC instruments 6422, Руководство пользователя

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36 Ground Resistance Testers Models 6422 & 6424
R
H
Ground Electrode Resistance Measurement (Model 6424)
Measurement range 0.050 – 9.999 kΩ 8.00 – 49.99 kΩ
Resolution 1 Ω 10 Ω
Intrinsic uncertainty ± (10 % R + 1 ct) ± (10 % R + 1 ct)
U
SE
Voltage Measurement (Model 6424)
Measurement range 0.10 – 99.99 V
AC/DC
8.00 – 600 V
AC/DC
Resolution 0.01 V 0.1 V
Intrinsic uncertainty ± (2 % R + 2 ct) ± (2 % R + 2 ct)
The instrument is protected up to 600 V between any two of the three input
terminals
3.2.4 Current Measurement (Model 6424)
Additional reference condition:
Peak factor = √2
Measurement
range
0.5 - 999.9 mA 0.800 - 9.999 A 8.00 - 60.00 A
Resolution 0.1 mA 1 mA 10 mA
Intrinsic
uncertainty
± (1 % R + 4 ct) ± (1 % R + 2 ct) ± (1 % R + 2 ct)
3.3 INFLUENCES
3.3.1 Voltage Measurement (Model 6424)
Quantities of
influence
Limits of the range
of use
Variation of the measurement
Typical Maximum
Temperature
(14 to 122°) F
(-10 to 50) °C
± 0.2 % R ± (0.5 % R + 1 ct)
Relative humidity (10 to 90) % RH - ± 2 % R
Frequency DC to 440 Hz - -3 dB
Peak factor 1.4 to 3 (up to 300 V) - ± 1 % R
DC and 50/60 Hz
common mode
rejection
(0 to 600) V
AC
65 dB 50 dB