The WTR-1000 type paper logger, with unique thermal printing recording method and advanced microprocessor control technology, achieves high definition, high accuracy, high reliability, multi-function and easy operation. A paper recorder can be continuously recorded and digitally printed.  
Each channel of the WTR-1000 type paper recorder can directly select and receive a variety of thermocouples, thermal resistances, voltage and current signals, and can digitally display the measured signals and carry out trend recording and digital recording. It can record the engraving value, the time and the curve of each signal on the printed 100mm wide paper grid, and print the channel number beside the tracks of each channel. A paper recorder can set parameters such as measuring signal type, decimal point position, display range, recording boundary, alarm value, return error, correction of system error, recording ruler, data printing interval, paper speed, printing depth and time and other parameters through the keyboard, and protect the parameters set. Paper recorder is widely used in medicine, petroleum, chemical industry, metallurgy, electricity and other industries and scientific research units.  
Main performance and technical index
1. input channel, single point, double point, three point four o'clock, five point six o'clock, eight o'clock.
The types of measurement signals for each channel can be set by users themselves.
It can also be noted at the time of ordering. [set by the manufacturer for the user]
2. channel isolation: input channels are isolated from each other, without interference.  
3. display function: fixed or roving display of measured values.
Set parameter display [in set condition]
Alarm prompt and reminder light
Time display [when all input signals are completely closed]
4. recording function: imported fixed thermal head, no ink consumption, no pen position.
Error, aseismic motion
There are 800 hot print points in the 100mm range.
Trend and digital records of measured values.
Print the ruler scale and each channel mark at the same time.
Print the scale value, the current time and the paper speed every 100mm.
5. real time: set the current date and time by keyboard.
Even if the power fails, it will not affect normal timing.
6. curve migration function: by setting the recording boundary, the trend record curves of different channels can be separated.  
7. scale conversion function: for voltage and current input signals, it can display and record the linear scale of input signals by setting the display range. For the thermocouple and the thermistor signal, the display range is the measuring range.  
8. input signal type and measurement range: all kinds of thermocouples, thermal resistances, standard voltage and current signals, set by keyboard.

Table 1

Overview
9. paper speed: set by keyboard, and paper speed is 10 mm/h to 990mm/h.  
10. alarm function:
Provide six sets of relay contact output, any combination of users.
The upper limit, the lower limit, the upper limit of difference and the lower limit of difference can be chosen for each channel alarm.
The alarm return difference of each channel can be set. When the relay operates, there is indication light.
Relay contact capacity: 24VDC, 3A; 220VAC, 3A
11. communication: it can provide RS232C or RS485 communication interface.
This is an extension function. It must be noted when ordering.
12. analog output: two way 4 to 20 mA analog output.
This is an extension function. It must be noted when ordering.
13. sampling period: 0.6S
14. digital display and alarm accuracy: + 0.2%F? S
15. trend recording accuracy: + 0.2% "two".
16. digital recording accuracy: + 0.2%F? S
17. input impedance: greater than 10MW. Note: when the current is measured, the input impedance is 250W * 18. power consumption: no more than 30W
19. normal working environment: temperature range: 0~50 degree C humidity range: 10~85% R? H
20. power supply voltage: 220 V; 50 Hz
21. external dimensions: 144, 144, 200 mm
22. opening size: 138+1 138+1 mm