1, Two isolated and three isolated power transmitter
Two isolation transmitter is the input signal and the output signal between the current loop isolation (insulation), the output signal and auxiliary power to ground; three isolated transmitter is the input signal, the output signal and the auxiliary power supply between the three Circuits are isolated from each other, not to each other.

2, IJ01 and IJ03 product differences
LF-IJ01 is three isolated AC current transducer, LF-IJ03 is two isolated AC current transducer.

3, Small signal transmitter use precautions
Small signal transmitter usually refers to the AC voltage input ≤ 10V, AC and DC current input ≤ 2A, DC voltage input ≤ 1V products. Installation, should be away from a place with strong electromagnetic interference, not with the solenoid valve, circuit breakers or relays and other auxiliary power supply sharing, signal lines to avoid tying them together, so as not to affect the stability of small signal products work.

4, LF-P and LF-Q products of the difference
LF-P for the active power transmitter; LF-Q for the reactive power transducer.

5, LF-IZ (B, M) 04 and LF-IZ06 products What is the difference
LF-IZ (B, M) 04 is suitable for monitoring the 30A-300A of the DC current transmitter; LF-IZ06 is suitable for monitoring 2A-20A DC current transducer.

6, IZ07 (27) and IZ08 (28) the difference
IZ07 is an in and out of a conditioner, IZ27 is one into the two out of the conditioner; IZ08 into a distribution for the one, IZ28 into a two-out of the distributor
The difference between conditioner and distributor:
Conditioning device will be 4-20mA DC current signal is isolated by the standard output of other DC signal;
The main distribution of the 4-20mA DC current signal is isolated by the standard output of other DC signals, and to provide users with isolated +24 V power supply.

7, The current output type and voltage output type transmitter compared the use of places
Voltage output type transmitter has the advantages of simple structure and low cost, but it has short transmission distance, poor anti-interference and load capacity. It is usually used in the electric energy measurement and control system or device. Current output type transmitter has the advantages of high signal transmission distance (> 100m), strong anti-interference ability and high precision, and is usually used for signal conversion connection between measurement and control systems or between system and field.

8, Two-wire AC power transmitter
Two-wire system refers to the field transmitter and control room instrument contact only two wires, the two lines are both power lines, but also the signal line. Two-wire transmitter using current or voltage transformer field equipment to the power line of the alternating power isolation, and then V / I conversion circuit into 4 ~ 20mA, according to the linear scale of the standard current signal output. And then through a pair of twisted pair to the monitoring system input interface. The twisted-pair cable will also route the 24V auxiliary power supply to the transmitter in the monitoring system. Two-wire transmitter auxiliary power supply, signal circuit and load with twisted-pair form a closed loop, its biggest advantage is strong anti-interference ability, signal transmission distance, eliminating the need for expensive signal transmission cable.

9, IJ03 and IJ03A the difference
IJ03 for the exchange of electricity transmitter, the output signal in accordance with the linear proportion of the measured power to reflect the average change.
IJ03A for the exchange of electricity transmitter, the output signal in accordance with the linear scale to reflect the measured changes in the RMS power.

10, The difference between mean and true RMS
True RMS (T-RMS) detection is the use of "root mean square" calculation method for non-sinusoidal alternating signal RMS measurement.
The mean detection is a measurement of the amplitude (average) of the alternating signal amplitude over a specified time.
Average value detection is usually used for the measurement of alternating current such as sine wave with regular waveform. When the waveform of alternating current is distorted, it is only accurate to measure with true rms transmitter.

11, VZ02 and VM02 the difference
VZ02 is a conventional DC voltage output transmitter, VM02 is a pulsating DC voltage output transmitter. The so-called pulsating direct current refers to the DC power in the superposition of the alternating components or amplitude fluctuations in the amount of DC power.

12, LF product response time
The LF product response time is the time required for the output signal to rise from 10% to 90% of the expected output value when the input signal transitions from zero to a nominal value.