I. Overview: 

 SCJ power station gate differential monitor to receive the analog signal, gate, gate level sensor sent two A / D converter to send the CPU to process the calculation, intuitive LCD display gate before the water level, gate level and gate the difference , and outputs the three-way analog corresponding to gate before the water level, water level and gate in the gate. Each group monitoring the amount of two pairs of relay alarm output, and the range and alarm values ??arbitrarily set by pressing a button. 
 Two main features: 

 SCM system using the MCS-51 series, after the frequency of some measurement of the timing pulse period is 2us, the measurement accuracy of up to 0.01Hz, high stability, long-term change. 
 2, the display circuit using the LCD screen display of Chinese characters, intuitive, easy viewing. 
 3, the signal input circuits are optically isolated. Signal cycle to take into the computer, and then converted into the corresponding water level values ??for display, memory. 
 Advanced WATCHDOG and voltage monitoring circuit to monitor the work of the computer when power on, power-down or voltage instability, the information in the industrial SPI standard serial memory can protect your computer. When the computer crashes, the watchdog can automatically generate a reset signal to restart the computer work, greatly improving the reliability of the instrument. 

 5, the steady-state switching power supplies, voltage 180-240V change does not affect the reliable operation of the monitoring and control devices. 
 Third, the technical parameters: 
 ? Measuring signal: level transmitter 
 ? Measurement accuracy: the non-linearity <0.25% 
 ? Display: the gate before the water level; gate level; gate difference; 6-channel alarm output settings and status. 
 ? Output signal: 6, each point by the user in the given range of tuning. 
 ? Intended output: 4 ~ 20mA 3 Road 
 ? Contact capacity: 3A/250VAC  3A/30VDC 
 ? Working environment: Temperature 0 ~ 65 ℃ Humidity <85% 
 ? Dimensions: plate mounted 144X144X165mm 
 ? Work: continuous 
 ? Power: 110V/220VDC or AC110/220V/50Hz 
 ? Power consumption: 10W