Paperless Chart Recorders

Paperless Chart Recorders

Send Inquiry

Paperless Chart Recorders (144x144mm, approximately 16 channels) is a color TFT LCD display; entirely secluded universal input like thermal resistance, thermocouple, current and voltage, regularity input, can sustain multi-loop flow totalizer with programmed temperature and pressure recompense function; accepts modular structure production functions like alarm, auxiliary control supply for sensors production, retransmission, print and communique etc. Gauging data can be showed in numerous types, like graphic display as bar-graph, history trending memory, real-time trending, history circular chart memory, real time circular chart, and alarming state show.

Also can be published in curve and data by mini printer using RS232 port; At the similar time, it also delivers features to examine the data of month, day, year, hour, minute, second straight. Recorder can be conformation with SCADA system, OPC server, and other specialized software with MODBUS-RTU communique protocol via RS485 port. The history data can be copied directly by USB flash drive, play and plug, easy and supple. PC reinforced data examination software can design the data in curve and output Excel arrangement for further analysis.

Khoat Make Color Paperless Recorder

  • Number of Channels - 1, 8 or 16
  • Accepts 5.6-inch TFT color LCD, high lightness, wide visual angle, and contrast.
  • English Menu intended. Simple and clear screen, kind human-meter operation screen, rich information, friendly - operator, easy operation
  • Accept SMT technology, extra concise designed.
  • Worldwide input for multi frequencies, adopt photoelectric separation amongst channels for evading the meddling among channels.
  • T.C and RTD input accepts nonlinear alteration with high correctness and stable performance.
  • Huge volume storage: 8MB for extended time record.

Technical Specification :

Analog Input Specification

Input Signal

: Linear Voltage : 0-5V, 1-5V, standard range: -20000 to 20000.
: Linear current : 0-10mA ,should be external connection with 500Ω resistor; 4-20mA and should be external connection 250Ω precise resistor. Standard range: -20000 to 20000.
: Thermocouple Input: K ( -50 ~ 1300
oC ),S ( -50 ~ 1700oC ),T ( -200 ~ 350oC ), E ( 0 800oC ), J ( 0 ~ 1000oC ), B ( 300 ~ 1800oC ), N ( 0 ~ 1300oC ), R(-50-1700oC) , WRE526 (-0 ~ 2300oC), WRE235 (0 ~ 2300oC)
: RTD Input : Cu50 ( -50 ~ 150
oC ) , Pt100 ( -200 ~ 600oC ), Cu100 ( -50 ~ 150oC )
: Other linear input: 0-20mV,0-60mV, 0-100mV, 0-500mV, standard range : -20000 to 20000.


: 0.2 grade when RTD, linear voltage, linear current and T.C input
: 0.2%FS+2.0oC when T.C input with cold junction compensation by internal part of recorder.

Sampling Rate

: ≤3 s

Temperature Shift Coefficient

: Standard value: 50PPM

CMR Ratio

: 85-110dB

Input Independence

: 500Kω when standard voltage input; 250Ω ( 4-20mA). Or 500Ω (0-10mA) when standard current input More than 20MΩ when other signal input


: Isolated voltage between channels and ground: 1000VAC.Isolated voltage between channels:400VAC


: Internal resistor: not more than 1000Ω. Cold junction compensation tolerance: maximum +-2oC


: Current 2.5mA, three wire, each wire with same resistance: max.10ohm per each wire.

Input Error Action

: When T.C., RTD,1-5VDC, 4-20mA input and there is open or short circle, there are three ways available: measured value as maximum, minimum or hold

Power Supply Specification

Power supply

: VAC: 100-240VAC, frequency: 47-63 HZ, max. power consumption: 5VA
: VDC: 24VDC,max power consumption: 5VA (please advise when order)


: When power insulation to ground is higher than 1500VAC, leakage current: 10mA for one minute
When power insulation to covering is higher than 1500VAC, leakage current: 10mA for one minute

Output Specification

Aux. power supply

:24VDC, 50mA

Alarm Output

: Up to 16 alarm output, 250VAC, 3A relay contact output: NO or NC


: Up to 6 channels, 4-20mA retransmission output with GND



: 32 bits, high performance, high integrated ARM CPU

Hardware guider

: CPU inner integration for long time, stable and safe operation

Hardware Clock

: Accept hardware real clock with high constancy. Clock accuracy: +-5ppm. After power off, Li battery for repeated power supply. The cogency of battery is 30days.

Data Memory

: All data will be stowed in FLASH memory, not essential reserve battery in order to safeguard that all the history data and conformation parameters will be not lost when power off.