1. Features

　　Ø Pressure monitoring and upper and lower limit alarm for oilfield oil pipeline pressure and constant/stop well formation pressure;

　　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, and change amount alarm, etc. parameters.

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

　　Ø 4 1/2 digit LCD display: pressure data, battery capacity icon, upper and lower limit alarm, etc. parameters.

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

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: pin 1 positive, pin 2 negative) connected to the instrument; power supply voltage range, 3.0V～3.6VDC;

　　6) Battery continuous operating time: ≥1 year (pressure 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, 0～2.5MPa、0～6.0MPa、0～25MPa、0～40MPa、0～60MPa; Accuracy, 0.5%F.S; Customizable according to actual needs; Conforms to GB/T 28474.1, GB/T 28474.2 regulations;

　　10) Pressure sensor: Using piezoresistive core, pressure overload capacity, 150%FS;

　　11) Process connection interface: M20X1.5 or 1/2’’NPT, customizable according to actual needs;

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

　　13) Communication protocol: Follows the "Cellular Network Temperature and Pressure Transmitter Communication Protocol" to achieve access to the oilfield DMZ server;

　　14) Online debugging and setting functions: It has online debugging and setting functions for the instrument through the instrument panel or configuration serial port and computer without uninstalling; 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 using a computer through the configuration serial port without uninstalling;

　　16) Liquid crystal (LCD) display: Liquid crystal display area, length × width = 45 × 35mm, the background color is green, the display content includes real-time measured value, pressure 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;

　　17) Instrument shell: The material is aluminum alloy, the shell sealing ring (gasket) 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).

　　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 pressure 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 below the front cover of the housing. Place the magnet upwards against the reset arrow, hold for 3-5 seconds, then remove the magnet. The red LED will flash three times, and the LCD display will also display 8888 and flash three times simultaneously, 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 pressure value, and to re-establish the network connection.

　　After opening the instrument back cover, the inside of the back cover contains the battery, buttons, switch, and USB debugging port. The functions are as follows:

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

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

　　Rear panel switch: The switch has three positions: up, middle, and down. The middle position is off, and the up and down positions are on.

　　Rear Panel USB: USB + debugging software allows for convenient input of IP address, network number, and other debugging parameters. Refer to 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 insert 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, note that the K1-K2 circuit board should be gently inserted and removed. Finally, tighten the rear cover. A 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 in a disconnected state. When installing the pressure transmitter on-site, open the meter head cover, turn on the battery switch, and be sure to tighten the sheath to prevent water leakage.

　　5.3. For pipeline and wellhead installation of cellular network wireless pressure transmitters, first close the valve (needle valve or gate valve) on the pipeline where the pressure transmitter is to be installed. There are two installation methods: (1) Screw the pressure transmitter directly into the upper port of the needle valve; (2) Screw a union or adapter into the upper port of the needle valve, and then screw the transmitter into the upper port of the union or adapter. This installation method uses a union or adapter to adjust the direction. After installation, open the needle valve to confirm that there is no leakage, indicating that the installation is qualified.

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

　　5.5. If the transmitter is not used for a long time, the pressure transmitter can be set to sleep mode using the debugging tool (the transmitter is set to sleep mode or off during factory 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. The battery model used in this product is ER34615M-3.6V38Ah; 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!