1. Features

　　Ø Temperature monitoring and upper and lower limit alarm for oil pipeline temperature in oil fields and single-well temperature of pumping units;

　　Ø Explosion-proof design: explosion-proof aluminum shell, intrinsically safe circuit board system;

　　Ø Protection level: IP68, fully sealed waterproof design;

　　Ø The instrument can set alarm enable, upper and lower limits, delay, dead zone, maximum range, minimum range, decimal places, upload frequency, acquisition frequency, change amount alarm, and other parameters.

　　Ø LED indication: reset indication, configuration mode indication, networking indication, data acquisition indication;

　　Ø 4.5-digit LCD display: temperature data, battery capacity icon, upper and lower limit alarm, and other parameters.

　　Ø Adjustable installation direction: The direction can be adjusted by connecting to the on-site pipeline valve through a live connection or adapter.

2. Performance Indicators

　　1) Operating ambient temperature, -40~70℃.

　　2) Ambient humidity: 0～95%RH, no condensation;

　　3) Protection level: IP68;

　　4) Explosion-proof mark: Ex ib II C T4 Gb，Explosion-proof certificate: CE18.2230X;

　　5) Power supply: ER34615 lithium thionyl chloride battery (implementation standard: SJ52278/1), two primary batteries in parallel, capacity 3.6V 38Ah; battery connector SM-2P (female head: 1 positive pole, 2 negative pole) connected to the instrument; power supply voltage range, 3.0V～3.6VDC;

　　6) Battery continuous working time: ≥1 year (temperature acquisition frequency 1 time/min, communication frequency 1 time/h);

　　7) Battery replacement method: Open the instrument back cover and quickly replace it through the standard SM-2P interface;

　　8) Long-term stability: Drift, ±0.1%FS/year;

　　9) Measurement performance: Range, 0～150℃、0～300℃、-50～500℃; Accuracy, 0.5%F.S; Customizable according to actual needs; Conforms to GB/T 28473.2, JJF1183 relevant technical standards;

　　10) Temperature sensor: PT100 platinum resistance encapsulation, temperature overload capacity, 150%FS;

　　11) Process connection interface: Probe-type process connection thread M20X1.5, patch sensor uses clamp installation, clamp size can be customized, clamp material 304 stainless steel, cable length is greater than 1 meter, and connected with metal flexible tube.

　　12) Communication method: NB-IOT or 4G (full network access, compatible with 3G/2G);

　　13) Communication protocol: Follows the "Cellular Network Wireless Temperature Transmitter Communication Protocol" to achieve access to the oil field DMZ server;

　　14) Online debugging and setting function: It has the function of debugging and setting the instrument through the miniUSB interface on the sensor instrument panel through a computer without uninstalling it during installation; the setting data content includes:

　　Ø Remote communication parameters: Server IP address, port number;

　　Ø Measurement parameters: Alarm enable, upper and lower limits, delay, dead zone, maximum range, minimum range, decimal places, upload frequency, acquisition frequency, change amount alarm;

　　The setting data is retained after the instrument is powered off;

　　15) Online upgrade: It can be realized by configuring the serial port and using computer operation without uninstalling it during installation;

　　16) Liquid crystal (LCD) display: Liquid crystal display area, length × width = 45 × 35mm, background color is green, the display content includes real-time measured value, temperature unit, instrument range, battery power, voltage, signal strength; the decimal point of the real-time measured value can be set, and the default is to retain 2 decimal places after the decimal point;

　　17) Instrument shell: The material is aluminum alloy, the shell sealing ring (pad) is silicone rubber, and Vaseline is applied to the front and rear cover threads; the dial diameter is 60mm, and the appearance color number is RAL5007;

　　18) Dimensions: Length × width × height = 150 × 130 × 235mm (MAX). (Does not include probe length)

　　19) Sampling interval: The sampling interval is 1～60 minutes, which can be set.

　　20) Sending interval: 5～1440 minutes, which can be set.

3. Explosion-proof Certification Parameters

　　Ø Explosion-proof certificate number: CE18.2230X

　　Ø Explosion-proof mark: Ex ib ⅡC T4 Gb

4. Appearance Structure and Function Introduction

　　Front panel LED: There are two colors, red and green. Red indicates the temperature acquisition status and the sleep-to-wake-up status. The green LED indicates the NB-IOT network connection status.

　　Front panel reset: Use a magnet, located directly below the front cover of the housing. Hold the magnet against the reset arrow for 3-5 seconds, then remove it. The red LED will flash three times, and the LCD display will also flash 8888 three times, indicating that the instrument has been successfully reset. The main purpose of the reset is to enter the instrument to modify internal parameters, or to refresh the current temperature value, and to re-establish the network connection.

　　After opening the instrument back cover, there are batteries, buttons, switches, and a USB debugging port inside the back cover. The functions are as follows:

　　Rear panel K1: Because the instrument reporting cycle has a long cycle, during the debugging process, you can press the K1 button, and the instrument will actively establish a network connection and report a set of current temperature data. K1 is mainly used to debug whether the network is in normal use.

　　Rear panel K2: Because the instrument reporting cycle has a long cycle, some application sites need to observe the real-time number of the current temperature. During the debugging process, you can press the K2 button, and the instrument will actively continuously collect the current temperature for 300 seconds, and the LCD will refresh in real time synchronously. This function only collects data on site and does not upload it. K2 is mainly used for on-site temperature debugging.

　　Rear Panel Switch: The switch is divided into upper, middle, and lower positions. The middle position is off, while the upper and lower positions are on.

　　Rear Panel USB: USB + debugging software allows for convenient input of IP address, network number, and other debugging parameters. See the debugging software manual for details.

　　Rear Panel Battery Replacement: First, turn off the power switch. Remove the two M3 knurled screws on the left and right sides by hand. Then, vertically remove the K1-K2 circuit board cover. Disconnect the black SM plug of the battery. Replace the battery with a new one, reinsert the SM plug, gently reinsert the K1-K2 circuit board vertically into the pins, and finally tighten the two M3 knurled screws by hand. Turn on the switch. During the entire process, pay attention to gently inserting and removing the K1-K2 circuit board. Finally, tighten the rear cover. The physical photo is shown below:

5. On-site Installation and Usage Instructions

　　5.1. All transmitters have undergone digital calibration, and different transmitters have complete consistency and interchangeability.

　　5.2. During transportation, the batteries of all transmitters are disconnected. When installing the temperature transmitter on-site, open the meter head cover, turn on the battery switch, and be sure to tighten the protective cover to prevent water leakage.

　　5.3. Installation of the cellular network temperature transmitter on the pipeline: (1) Shut down, depressurize, and evacuate the pipeline. Drill a hole in the pipeline slightly larger than the outer diameter of the sensor probe's blind pipe sleeve; (2) Vertically insert the blind pipe sleeve from the hole to the bottom of the pipeline, and then seal-weld it around the hole on the pipeline; (3) Inject heat transfer oil into the blind pipe sleeve, approximately 1/2 the volume of the pipe; (4) Insert the temperature sensor probe into the blind pipe sleeve, adjust the direction of the meter head, and tighten the union with a wrench to restore pipeline transportation.

　　5.4. After the installation of this cellular network wireless temperature transmitter is complete, network parameters can be set via buttons or debugging tools.

　　5.5. If the transmitter is not used for a long time, it can be set to sleep mode using the debugging tool (the transmitter is set to sleep mode or off during factory entry and warehousing. On-site parameter adjustment and activation are required for normal use). The online list of the debugging software interface is shown below:

6. Precautions

　　6.1. This product uses an ER34615M-3.6V38Ah battery; do not use other battery models.

　　6.2. The product antenna housing is made of plastic and has a potential electrostatic charge hazard! Avoid friction during use! Please wipe with a damp cloth when cleaning!