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technical article
Signal of paperless recorder
2012-1-28 11:42:57

长期以来一直受到广大用户的好评。 Jiangsu Jinhu Dongxiang Instrument Co., Ltd. is a manufacturer of display instruments. The paperless recorder produced by it has been praised by users for a long time. The following introduces several common paperless recorders for users

Failures and solutions.

1. The meter does not work when it is powered on.

A. Check whether the instrument 220V power terminal wiring is correct;

B. Check whether the instrument fuse is blown;


C. Unscrew the fixing screw behind the meter, pull out the watch core from the front, and check whether the cable between the power board and the main board is plugged in.


2. The LCD backlight is on, but no characters or curves are displayed.

Check the meter to see if the cables are connected properly.

3. If the channel does not count, the channel signal value is changed, and the channel display value does not change.

A. Use a multimeter to measure whether the signal is normal on the terminal;


B. Check whether the channel module switches and signal types are set correctly;

C. Open the case and check whether the channel signal cable is connected properly.


4. The channel measurement value is inaccurate.


A. Check whether the signal type setting in the channel parameter setting is consistent with the actual access signal type;


B. Whether the switch setting of the channel module is consistent with the signal type of the channel;


C. Check whether the signal wiring is correct and the signal cable is in good contact;

D. After confirming that there is no problem above, recalibrate the meter (note that the accuracy of the signal source must be higher than 0.1%). If the meter calibration is abnormal (cannot be calibrated), or the calibration is normal but the channel measurement is still abnormal, please contact the paperless record.

Contact the instrument manufacturer.


摒弃了传统有纸记录仪中使用的记录笔和记录纸,提高了记录仪本身的质量,增强了记录仪的稳定性和可靠性,更重要的是降低了记录仪的运行成本。 The paperless recorder abandons the recording pen and recording paper used in traditional paper recorders, improves the quality of the recorder itself, enhances the stability and reliability of the recorder, and more importantly reduces the operating cost of the recorder .

There are two ways to access the paperless recorder:

1. The method of adding amplifier and acquisition card is simple in structure and low in cost. It has a certain versatility in the experiment and can be connected with a variety of instruments, which is suitable for data collection for student experiments. The accuracy of data acquisition depends mainly on the performance of the amplifier, II amplification

The amplifier amplification error is <± 1%, which can meet the needs of experiments and general application research.

2. Serial port mode is used for instruments with serial port output. Because the serial port parameter settings of different instruments are different, you need to set it according to the instrument's instructions when using it.

The paperless recorder transfers data through U disk or CF card, and transfers the recorded data on the paperless recorder to the computer. The user can use the upper computer data management software provided by the manufacturer to save and process the data. machine

To reproduce historical data and historical curves. Or use RS-232C / RS-485 communication interface to realize remote monitoring and management of data recorded on paperless recorder.

是将工业现场的各种需要监视记录的输入信号,比如流量计的流量信号、压力变送器的压力信号、热电阻和热电偶的温度信号等,宽屏无纸记录仪 The paperless recorder is a wide-screen paperless recorder that takes various input signals that need to be monitored and recorded at the industrial site, such as the flow signal of a flowmeter, the pressure signal of a pressure transmitter, the temperature signal of a thermal resistance and a thermocouple, etc

Data processing is performed by a high-performance 32-bit ARM microprocessor. On the one hand, it is displayed in a variety of pictures on a large-screen LCD display screen.

Memory chip for data and graphics query, flipping and printing directly on the recorder. The main applications of paperless recorders are: metallurgy, petroleum, chemical, building materials, papermaking, food, pharmaceutical, heat treatment and water treatment, etc.

Various industrial scenes. With the development of science and technology, the paperless recorder has expanded more functions, such as PID adjustment, etc., and is also developing towards an increasingly integrated trend.