1、 Overview of Small Combination Printing Integrated Paperless Recorder
Tianxin Instrument Small Combination Printing Integrated Paperless Recorder is a new intelligent recording instrument with advanced 32-bit CPU as the core, supplemented by large-scale integrated circuits and graphic LCD displays. The instrument displays a large amount of information, is easy to operate, and has a friendly interface. The following are the main functions:
1. Adopting high-performance ARM Cortex-M3 32-bit RISC core, it can simultaneously achieve multi-channel signal acquisition, recording, display, and multi-channel alarm;
2. Using a 256M large capacity FLASH flash chip to store historical data, never losing data in case of power failure;
3. Fully isolated universal input, capable of simultaneously inputting multiple signals without the need to replace modules, can be configured through software;
4. The numerical range for displaying engineering quantity data is wider, and it can display 4-digit values: -999~9999;
5. The copy and paste function of the clipboard facilitates user parameter settings;
6. Multiple optional functions and additional features are available: optional functions include data backup, serial communication, serial printing, alarm function, power supply output, transmission output, etc; Additional feature: Historical curve. Note: Optional functions need to be specified by the customer when placing an order, and additional functions need to be customized.

2、 Main features of a small combination printing integrated paperless recorder
1. Screen: 128 * 64 dot matrix blue screen liquid crystal display (LCD);
2. Accuracy: Real time display: ± 0.2% F.S;
3. Memory recall accuracy: ± 0.2% F.S;
4. Processor: Adopting high-performance ARM Cortex-M3 32-bit RISC core, it can simultaneously achieve multi-channel signal acquisition, recording, display, and multi-channel alarm;
5. Storage module: using high-capacity parallel NAND FLASH flash memory chips to store historical data, and using serial FRAM storage chips to store system configuration parameters and other key information;
6. Input specifications: fully isolated universal input, 1-4 channel signal input (maximum support for 4 analog inputs+1 frequency input);
7. Recording capacity: 64/128/192/248MB (FLASH capacity can be selected);
8. Voltage input: 0-5V, 1-5V, 0-20mV, 0-100mV;
9. Current input: 0-10mA, 4-20mA, (0-20mA needs to be specified when ordering);

3、 Performance indicators of small combination printing integrated paperless recorder
1. Resistance input: Res;
2. Frequency input: Frequency signal (PI) (frequency range: 0-5000HZ; input signals: 0-10mA, 0-12V, 0-24V, 4-20mA; 4-20mA requires customization);
3. Thermal resistance: PT100, Cu50, G53, Cu100, BA1, BA2 (requires balanced three wire resistance, lead resistance ‹ 10 Ω);
4. Thermocouples: S, B, K, T, R, E, N, J;
5. Radiation pyrometer: F1, F2;
6. Tungsten rhenium: WRe3-25, WRe5-26;
7. Other input signals (such as switch inputs) or division marks (such as PT1000) should be specified when ordering;
8. Distribution output: transmitter centralized distribution+24VDC, standard distribution ≤ 30mA (maximum load capacity can be customized), supports multiple specifications of centralized distribution (such as 12VDC, 5VDC distribution output);
9. Transmission output: Supports up to 2 channels of 4-20mA standard current transmission output, with a load capacity of 750 Ω (maximum), which facilitates the acquisition of display instruments or DCS/PLC, and also realizes long-distance signal transmission;
10. Relay alarm output: 2 relay contact outputs (up to 4 relay alarm outputs can be supported), contact capacity 3A, configurable upper limit, upper limit, lower limit, and lower limit alarms;
11. Communication and printing: Communication interface - RS232C or RS485, supports Modbus RTU protocol, baud rate - (1200, 2400, 9600, 19200, 38400, 57600), printing interface - RS232C directly connects to a micro printer;
12. Record interval: 1 second to 240 seconds, divided into 11 levels: 1/2/4/8/12/24/36/60/120/180/240 seconds optional;
13. Recording time: The length of recording time is related to the capacity of FLASH memory, the number of input points, and the recording interval. The calculation formula is as follows:

14. Data backup and transfer: Supports USB 1.1 and 2.0 USB flash drives, supports 1GB to 16GB USB flash drives for data transfer, has strong compatibility, and is compatible with the vast majority of USB flash drives on the market;
15. Cold end compensation error of thermocouple: ± 1 ℃;
16. Power outage protection: Built in FLASH memory to protect parameters and historical data, which can be permanently saved after power outage;
17. Integrated hardware clock: can run accurately even after power failure;
18. Clock error: ± 1 minute/month;
19. Power supply: standard 220VAC, 50HZ AC power supply, supports 24VDC (22VDC-32VDC) DC power supply, supports 12VDC (11.2VDC-20VDC) DC power supply, DC power supply needs to be specified when ordering;
20. Environmental temperature: 0-50 ℃, avoid direct sunlight exposure;
21. Environmental humidity: 0-85% R.H;
22. Net weight: ≤ 1.0Kg