Mianyang Weibo Electronic Co.,Ltd.
No.98 Youxian East Road, Youxian District Mianyang City P.R. China
Tel: 86-816-2971265 Fax: 86-816-2281934
www.wbsensor.com
4
4
(2) The testing must to be done by under the following conditions
；
Auxiliary power: nominal input
±
5
％
Ambient temperature:
25
℃±
5
℃
Relative humidity
: RH(45
～
75)
％
Accuracy for Signal Power Source instrument:
0.05
(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 Ur. (for e.g.
if input value is 100V, the output is 4mA-20mA, the expected output value Iz should be calculated
as:
I
z = (20mA
－
4mA)×
U
r/100V
＋
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= (
U
o
－
I
z×250Ω)/[(20mA
－
4mA)×250Ω]×100%
(6) Repeating (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.
The product only be used for testing the AC wave shape that with low harmonic wave.
4.
Don’t dismantle the product, and carry with care to avoiding bump and fall of the
product;
5.
If the product has been using under the environment with strong Electromagnetic field
