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| Add Time： | 2016-08-21 15:06:08 |
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Product description:
Model: PT01C
A, product characteristics
1, PBT shell, high temperature resistance, corrosion resistance;
2, epoxy resin, good isolation performance, strong impact resistance;
3, small size, beautiful shape, pin type direct welding circuit board;
4, wide linear range, good consistency.
Two, model definition
Three, performance index
The current type I/O nonlinear phase shift RL=0 (compensation) linear range of load resistance PT01C-2/22mA /2mA < 0.1% < 5'0 ~ 10mA≤ 500&Omega PT01C-1/11mA; /1mA < 0.1% < 5'0 ~ 10mA≤ 500&Omega PT03C-2/22mA; /2mA < 0.1% < 5'0 ~ 10mA≤ 500&Omega PT03C-1/ 11mA; /1mA < 0.1% < 5'0 ~ 10mA≤ 500Ω isolation voltage the use of temperature storage temperature relative humidity > 2500Vac-50 DEG to 65 DEG -60 to 80 DEG C < 90% rated voltage rated output voltage of series resistance after 30V ~ 1000V50mV ~ 8V (operational amplifier) (2mA) type I/O precision voltage phase shifted RL=0 (compensation) linear range of load resistance PT02V-450/7.07450V /7.07V0.5 < 5'0 ~ 120%≥ 500k&Omega PT02V-100/4100V; /4V0.5 < 5'0 ~ 120%≥ 500kΩ isolation voltage temperature storage temperature relative humidity > 2200Vac-40 DEG to 75 DEG -60 to 75 DEG C < 90%
Four, shape and pin diagram (unit: mm)
PT01/PT03 is actually a Ma class precision voltage transformer (current type voltage transformer), the input current rating of 2mA, rated output current of 2mA. Users need to use the voltage signal into a current signal, the recommended circuit is shown in figure 1. Figure 1, R'is a current limiting resistor, no matter how much the rated input voltage, adjust the value of R', so that the rated input current of 2mA, to meet the conditions of use. The auxiliary circuit is a current / voltage conversion circuit. Adjust the value of the feedback resistor R and R to obtain the desired voltage output. Capacitance C1 and adjustable resistor R'are used to compensate the phase shift. The proposed R take Vo/0.002, r take R/10, C1 value of about 65/R (μ F), R 'take 200kΩ. Capacitors C2 and C3 are 400 to 1000pF small capacitors used to decouple and filter. The two diodes are connected to protect the op amp. The operational amplifier is used as the visual precision, and it is recommended to use the OP07 series. It is easy to achieve high precision and good stability by using the operational amplifier with good performance. Operational amplifier supply voltage is usually +15V or +12V, can also be customized according to the specific circumstances. Figure 1 resistance R and R'require accuracy is better than 1%, temperature coefficient is better than 50PPM, R' power requirements have a margin of 2 times. The user can change the recommended circuit to form a single power supply mode, which is suitable for the input of the unipolar A/D converter. Rated input current can also be selected as 1mA to reduce power consumption or 5mA to reduce the phase shift, the nonlinearity is still better than 0.1%. Five, the use of methods
It is also possible to convert the output of the PT01/PT03 to a voltage signal if it is not directly connected with an operational amplifier. The use of the circuit shown in Figure 2, on the premise that the resistance is less than 400&Omega, the maximum output voltage of 1 volts, then can get the output voltage signal is better than the nonlinearity of 0.1%. Compared with the recommended circuit, the effects are as follows: 1 the dynamic range of the transformer is reduced. 2 increase the phase shift.
PT02 is actually a precision voltage type voltage transformer, the transformer isolated voltage signal into a voltage signal the rated input voltage is usually 100V, 450V, 4V, 7.07V are usually rated output voltage, but also can be designed according to customer requirements, can not deal directly behind the A/D sampling circuit
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