Sensor is main feature parameters and connection

1 sensor main characteristic parameters of the

1, zero output: in current or voltage to be measured under the condition of zero, the output of the sensor output signal to zero.

2, rated output: sensors under the condition of the measured signal for rating, the difference between the sensor output signal and the output value of the zero sequence for the rated output.

3, linearity, linearity is the actual characteristics of measuring sensor in accordance with the extent of the straight line, due to the actual features is usually a curve, it has a deviation and theoretical characteristics, the size of the deviation of the extent to which reflects the actual characteristics of nonlinear, it can be said with the non-linear error measuring system linearity.

4, accuracy, precision of the sensor when the sensor within its range, and its basic error sensor is expressed as a percentage of the rated output value.

5, measuring range, the sensor measurement range refers to the sensor can measure the maximum current value or voltage value, measuring range is generally higher than that of rating of more than two times.

6, zero temperature drift: each sensor temperature change 1 ℃, the change of the zero output value and the ratio of the rated output value, generally less than 0025%.

2 sensor connection

1, straight type ( Open loop) Connection

1) Direct current sensor CS series. Its output signal for voltage form, under the rated working conditions, the standard output signal of plus or minus 4 v. If users have special requirements, can produce different rated output of the sensor to the manufacturer. Sensors on the zero and gain adjustment potentiometer, users do not need to be adjusted again.

　　2) Direct put current sensor for four more terminals, respectively, are power input '1' side, negative power input '2', '3' end for the signal output end, '4' for the power supply.

2, magnetic balance type ( The closed loop) Connection

1) Magnetic balanced current, its output signal voltage sensor for the current. ( If you need voltage output mode, can be in M side and power supply according to the voltage required size between external sampling resistor or sampling voltage signal amplification of necessary. )

　　2) Magnetic balanced current and voltage sensors are three terminals, respectively: 'end' is the power input, negative power input by '- 'End,' M 'for the signal output end of the

3, voltage sensor wiring 1) Voltage sensor in general there are 5 terminals, including 'V', 'V - 'As the primary side terminals, respectively the measured voltage at the input of the positive and negative. Another three terminals as terminal side, 'end' is the power input, negative power input by '- 'End,' M 'for the signal output terminal.

　　2) According to the measured voltage is different, the user should be on the way and the original edge back concatenated current-limiting resistance R. Best accuracy is achieved for the sensor, try to choose the size of the R make the input current of 10 ma, left and right sides.

　　3) Considering the primary coil resistance ( Compared with Ri, to keep the temperature as low as possible) And isolation. In order to ensure the stability of measuring the resistance, Ri of power for over 4 times of the rated power ( In more than 10 w) 。

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