(A) Overview EPF type frequency transmitter, using the latest electronic circuitry to produce a standard quartz crystal frequency, the difference between the input frequency converted into a DC analog after comparing power output. Using a quartz crystal and drift-free digital circuits, so that the frequency transmitter, high accuracy, good temperature performance, stable and reliable. DC output proportional to the input of the transmitter are measured frequency change can be accurately measured to 50Hz, 60Hz is the center frequency of the frequency offset. And capable of high resolution frequency measurements within a narrow frequency range. The transmitter input and output specifications for customers to have more choice, and indicating instruments and other devices with the convenience RTU. (B) the type and specifications: EPF- frequency transmitter (Fig. 2) Accuracy: 0.5% Specifications: Vn: Frequency range Bn Fn auxiliary power Pn On: analog output voltage range of 30-600V F1 50Hz B1 ± 0.5 Hz B2 ± 1Hz P1 AC 100V PD1 * O1 0 ~ 1mA O2 0 ~ 20mA O3 4 ~ 20mA O4 0 ~ 5mA O5 0 ~ 10mA F2 60Hz B3 ± 2Hz ??B4 ± 5Hz P2 400Hz PD2 * O7 0 ~ 1V O8 0 ~ 5V O9 0 ~ 10V F3 400Hz B5 ± 10Hz B6 consumption 3.5 VA O10 2 ~ 10V O11 1 ~ 5V O13 specify Note: * GPF output from 0 to positive full scale, as 0-1mA corresponding 48-52Hz. * If you require full-scale output is negative -0- positive full-scale output can fill 013, and indicate the full-scale value.