AEMC GROUNDFLEX 6474, Руководство пользователя

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GroundFlex™ Adapter Model 6474
For test frequencies between 41 and 5087 Hz, between 1 and 4 turns of the
GroundFlex
™
sensor, and a selection of 1 to 4 measurement channels, the
operating accuracies are the following:
SENSITIVITY and minimum I
SEL
minimal Operating accuracy for R
S-ES
S x 1/10 I
SEL
> 10mA ± (10% + 4cts)
S x 1 I
SEL
> 5mA ± (5% + 4cts)
S x 10
I
SEL
> 5mA ± (5% + 4cts)
5mA > I
SEL
> 0.5mA ± (15% + 10cts)
Current Measurement with GroundFlex™
Measurement Range
0.0 to
99.9mA
(1)
100 to
999mA
1.00 to
9.99A
10.0 to
99.9A
Resolution 0.1mA
(1)
1mA 0.01A 0.1A
Frequency 16 to 400Hz
Accuracy <5% of Reading @ 50/60Hz
(1): Valid only in the SENSITIVITY x 10 setting
The current measured depends on the number of turns of the GroundFlex
™
sensor
around the conductor to be measured. (e.g. i f the GroundFlex
™
sensor is wrapped
4 times around a conductor carrying a current of 1A, the input signal will be the
same as if the
GroundFlex
™ sensor were wrapped once around a conductor car-
rying a current of 4A. The operating error is therefore indicated for an input signal
current in A.tr (Ampere.turns)
.
The minimum current measured depends on the setting of the SENSITIVITY switch
as indicated by the table below:
SENSITIVITY I
MIN
(A.tr) Points additional error (pt-er)
x 10 0.01 5
x 1 0.04 2
x 1/10 0.16 2
Accuracy
Current (A * turn) 16 to 49Hz 50 to 99Hz 100 to 400Hz
I
MIN
to 0.399 ± (20% + pt-er) ± (5% + pt-er) ± (3% + pt-er)
0.4 to 39.9 ± (10% + 2ct) ± (3% + 2ct) ± (3% + 2ct)
40 to 99.9 ± (10% + 2ct) ± (3% + 2ct) ± (20% + 2ct)