WBI417S91 converts AC input current into a load independent output signal RMS (0)4-20mA. It has adopted electromagnetic isolation principle for real time measurement of AC current from electric net or electric circuit.
It is suitable for current isolation measurement of sine wave and non-sine wave (rectangular wave, triangular wave, sawtooth wave and other large distortion waveform).
(1) According to the terminal definition table to connect the testing circuit;
(2) The testing must be done by under the following conditions;
Auxiliary power: 24V±5％,ripple Less than or equal to 5mV
Ambient temperature: 25 degree ±5 degree
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 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 of the transducer should be calculated as:
=(Uo－Iz×250Ω)/[(20mA－4mA)×250Ω]×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.
Popularni tagovi:
: AC 0~50A
: RMS 0-20mA or 4-20mA DC
: Class 0.2
: +12VDC/+24VDC
: 300ms
: 30 times of nominal input, 5 seconds
: 50×10-6/ degree
: 0 degree ~50 degree
: DIN rail 35mm mount or screw mount.
