? All-digital intelligent instrumentation;? Suitable for all standard output of the transmitter and the sensor bridge mV level voltage differential signal;? Using eight digital tube, up to the maximum display range -19999 to 999999;? Choose m, kPa, MPa and other units display mode;? power off to save the set parameters, the power automatically read the settings and automatically detects all display devices;? 4 limit switches with a contact output can be set to control the domain, each limit can be set;? Standard serial RS232 / RS485 digital interface, fully isolated current and voltage output;? can be set "point" value (ie, zero altitude transmitter to be displayed when the value of the instrument or transmitter installed);? may connected with two of the company's transmitter for liquid level measurement sealed container or trash racks around the poor;? instrumentation hardware watchdog dual structure, power magnetic isolation and optical isolation measures, the whole super interference;? For Standard transmitter signal input, the instrument in the field of passive adjusted to facilitate exchange and transmitter site commissioning;? within the range, the instrument analog output can be arbitrarily selected transmitter output range, achieve zoom range;? wide power range, reliable operation in the AC85V ~ AC420V range, especially for the power grid environment;? pull-out design, the instrument can be drawn from the movement within the housing for easy instrument maintenance and replacement;? instrument case aluminum alloy materials, a lightweight strong, suggesting that anti-electromagnetic radiation advantages type 1, the control point can be set in the field of products, but also when ordering, set by the manufacturers. 2, digital communications port with RS232 and RS485 digital interface ASCⅡ code transmission. Instrument to master-slave network design, to comply with "Mike communications company digital transmitter instruction set", using RS485 interface can consist of distributed monitoring and control network and host computer. About the communication protocol details, refer to "Mike communications company digital transmitter instruction set." Performance parameter transmitter feed: 24VDC / 50mA sensor power supply: constant voltage, constant current adjustable sampling rate: 18 times per second non-linear error: ≤ ± 0.1% transmission output accuracy: ≤ ± 0.5% Long-term stability: ≤ ± 0.5% / year Input signal: 4 ~ 20mA, 0 ~ 20mA, 0 ~ 10mA, 1 ~ 5V, 0 ~ 5V, 0 ~ 10V (transmitter type) 0 ~ 5 ~ 1000mV (sensor type) transmitter output : completely isolated: 0/1 ~ 5VDC, 0 ~ 10 / 20mADC, 4 ~ 20mADC Display: 13mm (0.5 inches) six super bright red LED light: the upper limit, the upper limit and lower limit, lower limit, kPa , MPa, m maximum display: Measured value plus "basis points" can be displayed after the value -19999 to 999999 Communication interface: RS485 / RS232 Ambient temperature: -10 ℃ ~ 60 ℃;