Mianyang Weibo Electronics Co.,Limited
No.7 Road 2 of Xianren Road Youxian District Mianyang City P.R. China
Tel: 86-816-2971265 Fax: 86-816-2281934
5
5
Auxiliary power:
24V
±
0.5
％，
ripple
≤
5mV
Ambient temperature:
25
℃±
2
℃
Relative humidity
: RH(45
～
75)
％
Accuracy for Signal Power Source instrument:
0.05
(3) Warming up the transducer for 3 minutes
(4) Based on the indication of 3-phase AC Calibration Meter, set one set of
any
input value which is within the measuring range of the transducer Ur (line
voltage), Ir, COSφ, and the 3-phase input is balanced. (e.g. if input value is
100V and 5A, the output is 4-20mA, the expected output value Iz should be
calculated as:
Iz =
（
20mA
－
4mA)×│(Ur×Ir×COSφ)/(100V×5A)│
＋
4mA
）
(5) Using output monitoring meter V2 to measuring the output voltage V0 of the
transducer, the basic introduced error
γ
of the transducer should be calculated
as:
γ= (Vo－Iz×250Ω)/[(20mA－4mA)×250Ω]×100
Repeating step (4) (5), if calculated absolute value is less than the given accuracy value of the
transducer, it shows the transducer’s accurate grade is qualified.
Caution:
Caution:
Caution:
Caution:
1.
Pay attention to the auxiliary power information, especially the auxiliary power grade,
and polarity, other wise will damage the product.
2.
Pay attention to the wire connection; wrong terminal connection will cause
malfunction of the product and even damage the product;
6
Auxiliary
Power
7
V2
+
-
10
10
A
Ia
Transducer
11
B
C
250Ω
U
C
Ic
3
U
B
5
U
A
Three
Phase
AC
Calibration
Meter
1
V-
