5
Mianyang Weibo Electronics Co.,Limited
No.98 Youxian East Road, Youxian District, Mianyang City, P.R. China
Tel: 86-0816-2971265 Fax: 86-016-2281934
www.mywbdz.com [email protected]
(3)
Warming up the transducer for 3 minutes
(4)
using output monitoring meter V1 to measuring the output of signal
power source instrument, set a any input value which is within the
measuring range of the transducer Ir (e.g. if input value is 5A, the
output is 4mA
～
20mA, the expected output value Iz should be
calculated as:
Iz = (20mA
－
4mA)
×
Ir/5A
＋
4mA
(5)
Using output monitoring meter V2 to measuring the output voltage
Uo of the transducer, the basic introduced error
γ
of the transducer
should be calculated as:
γ
= (Uo
－
Iz
×
250
Ω
)/[(20mA
－
4mA)
×
250
Ω
]
×
100
(6)
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:
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;
3.
Don’t dismantle the product, and carry with care to avoiding bump and
Sign
al
Sour
ce
Transducer
Power
V
1
-
V
2
6
3
1
3
+
+
-
-
R
250Ohm
