AEMC GROUNDFLEX 6474, Руководство пользователя

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GroundFlex™ Adapter Model 6474
15
CHAPTER 3
SPECIFICATIONS
3.1 Electrical
Measuring Method:
Voltage/Current measurement with a rectangular AC signal
Short Circuit Current: > 200mA
AC
Noise Suppression: > 80 dB at frequencies differing by 20% or more from the
test frequency
Max. Overload: 250Vrms
Max. Value for R
H
& R
S
: 100k Ω
Measuring Time: Short push on START: approx. 7 s for first value of R
E
at
128Hz, then 3 measurements per s.
Long push on START: approx. 15 s for first value of R
E
at
128Hz, then 3 measurements per s.
Pylon Measurement with GroundFlex™
Measurement
Range
0.067 to
9.999 Ω
10.00 to
99.99 Ω
100.0 to
999.9 Ω
1.000 to
9.999k Ω
10.00 to
99.99k Ω
Resolution 0.001
Ω
0.01
Ω
0.1
Ω
1
Ω
10
Ω
Test Voltage 16 or 32V user selectable
Frequency From 41 to 128Hz selectable
Resistance Measurement
Frequency
From 41 to 5078Hz selectable
Accuracy ±5% of R 1ct @ 128Hz
The intrinsic error specified refers to reference conditions with a test voltage of
32V, test frequency of 128Hz, R
H
, and R
S
= 1k Ω , no external voltage.
The operating error for measurements of R
H
, R
S
and R
E
is the same as that specified
for 4-Pole earth resistance measurement.
The operating error of AC resistance measurements can be less than that specified
for voltage or current because frequency characteristics of the voltage channel are
matched to those of the current channel.