Drying Equipment Monitoring & Control Instruments

I. Overview

    The LU-MMR100 wood core temperature detector with monochrome LCD display integrates detection, on/off control, recording and data printing, and is mainly used in wood heat treatment production. It has 4 PT100 RTD inputs plus instrument alarm and control outputs, with complete isolation between input and output. The first and second channels measure the temperature of wood core 1 and wood core 2. The third and fourth channels measure ambient humidity and ambient (dry-bulb) temperature. The LU-MMR100 wood core temperature detector can realize on/off control of the dry-bulb temperature, and can be optionally equipped with independent upper-limit and lower-limit alarm functions for wood core temperature 1 and wood core temperature 2.

    Flexible data storage modes: the recording storage space is dynamically adjustable, and each channel has an independently adjustable recording interval; users can select channels and recording intervals for data storage as required. A large-capacity FLASH memory chip stores historical data, which is retained on power failure, and the internal storage time can reach 140 hours to 5600 days.

    Convenient data processing methods: connect directly to a micro printer to print data and curves for a user-specified time period; connect to a portable computer or palmtop (PAD) via the RS232 communication interface to upload real-time/historical data from the instrument directly, and analyze, archive and print the data through host computer data management software; it can also be connected to professional configuration real-time monitoring systems such as KingView and MCGS.

    Powerful display functions: extra-large numeric display, bar graph display, real-time curve display, historical curve display, alarm query, alarm status display, etc. All curve screens can be zoomed, and an intelligent fully automatic playback of historical trends is provided with time and amplitude zoom, making it extremely convenient to locate alarm points. A positioning query function is also provided, allowing direct query of data for a specific year, month, day, hour, minute and second, which is convenient and fast. A flow statistics function is available to query the cumulative flow value of any period;

     Modular design makes configuration more flexible, and different acquisition boards can be used simultaneously; the power supply and acquisition boards are designed in separate layers, and the input and output are completely electrically isolated, greatly improving the reliability of the instrument.

     It also provides a bilingual Chinese/English display interface.

II. Technical Specifications

     ●  LCD: 128*64 monochrome liquid crystal display

     ●  Temperature measurement range:0-100°C

     ●  Temperature basic error:±1°C

     ●  Humidity measurement range:0-100%RH

     ●  Humidity resolution:1%RH

     ●  Acquisition period:0.5 s

     ●  Settable range of data recording interval:1 second to 4 minutes

     ●  Storage time:T=storage capacity/sum of the reciprocals of the recording intervals of all active channels; the more channels are enabled and the shorter the recording interval, the shorter the storage time. When the stored data is empty, the storage capacity, i.e. the total number of storage records, is 4000*504.

For example: when the stored data is empty and channels 1, 2, 3 and 4 are enabled with recording intervals of 1 s, 5 s, 10 s and 20 s respectively, then T=4000*504/(1/1+1/5+1/10+1/20)=1493333.3 s=414.8 hours=17.28 days

     ●  Power supply:AC220V±%10,50Hz±2Hz

     ●  Ambient temperature:0-45°C

     ●  Ambient humidity:0-85%

III. Model Description

                  

IV. Wiring Method

Wiring of the temperature probes

1.Wiring of the wood core temperature probe

      Connect the wood core temperature probes (the two longer ones) to “Wood Core 1” (terminals A1, A3, A5) and “Wood Core 2” (terminals A9, A11, A13) on the rear panel of the instrument. Connect the red wires to terminals A1, A3, A9 and A11 respectively, and the white wires to A5 and A13.

2.Wiring of the dry-bulb and wet-bulb temperature probes

       Connect the two sets of temperature probes (the two shorter ones) to the “Wet-bulb Temperature” terminals (A2, A4, A6 ) and the “Dry-bulb Temperature” terminals (A10, A12, A14) on the front panel of the instrument respectively, connect the red wires to terminals A2, A4, A10 and A12 respectively, and the white wires to A6 and A14.

Wiring of the control outputs

1.B1 and B3 are the upper-limit alarm control terminals of wood core 1, B5 and B7 are the lower-limit alarm control terminals of wood core 1, B9 and B11 are the upper-limit alarm control terminals of wood core 2, and B13 and B15 are the lower-limit alarm control terminals of wood core 2.

2.B2 and B4 are the on/off control terminals of the ambient (dry-bulb) temperature.

3.The printer and external communication share the RS232 communication port of the instrument. When using the printer, short-circuit terminals B12 and B20 as well as B14 and B18. When using external communication, remove the short-circuit jumpers between B12 and B20 and between B14 and B18, then connect B16 (GND),B18(TXD),B20(RXD) to pins GND(5),RXD(2),TXD(3) of the PC serial port. If RS485 communication is required, it can be specially customized.