Pressure transmitter/NB-IOT cellular network wireless pressure transmitter

1. Features

ØOil field pipeline pressure, well formation pressure, pressure monitoring and upper and lower limit alarms;

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

Ø Protection grade: 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 alarm and other parameters.

Ø LED indication: reset indication, configuration mode indication, network access indication, data collection indication;

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

Ø Adjustable installation direction: It can be connected to the on-site pipeline valve through a union or adapter, and the direction can be adjusted.

2. Performance indicators

1) Working environment temperature: -40~70℃,

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

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

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

7) Battery replacement method: Open the back cover of the instrument 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; can be customized according to actual needs; in accordance with GB/T 28474.1 and GB/T 28474.2;

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

11) Process connection interface: M20X1.5 or 1/2''NPT, can be customized according to actual needs;

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

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

14) Online debugging and setting function: It can debug and set the instrument through the instrument panel or configuration serial port and computer without uninstalling online installation; the setting data content includes:

Ø Remote communication working parameters: server IP address, port number;

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

After the instrument is powered off, the setting data is retained;

15) Online upgrade: It can be realized by configuring the serial port and using a computer without uninstalling the software;

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

17) Instrument housing: Made of aluminum alloy, the housing seal (gasket) is silicone rubber, and the front and rear cover threads are coated with vaseline; the dial diameter is 60mm, and the exterior color is RAL5007;

18) Overall dimensions: length × width × height = 150 × 130 × 235 mm (MAX).

19) Sampling interval: The sampling interval can be set from 1 to 60 minutes.

20) Sending interval: configurable from 5 to 1440 minutes.

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 represents the pressure collection status and sleep to wake-up status. The green LED represents the NB-IOT network link establishment status.

Front panel reset: Use a magnet to position the magnet upwards towards the reset arrow just below the front cover of the housing. Hold it steady for 3-5 seconds before removing the magnet. The red LED light will flash 3 times and the LCD display 8888 will also flash 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, refresh the current pressure value, and re-establish a network link.

Open the back cover of the instrument. Inside the back cover are batteries, buttons, switches, and USB debugging ports. The functions are described as follows:

K1 on the rear panel: Since the instrument has a long reporting cycle, during the debugging process, you can press the K1 button, and the instrument will actively establish a network link and report the current set of pressure data. K1 is mainly used to debug whether the network is working properly.

K2 on the rear panel: Due to the long reporting cycle of the instrument, some application sites need to observe the real-time number of the current pressure. During the debugging process, you can press the K2 button, and the instrument will actively and continuously collect the current pressure for 300 seconds, and the LCD will be refreshed in real time. This function is only for on-site collection and not uploaded. 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 in the closed state, and the up and down positions are in the open state.

Rear panel USB: USB+debugging software, you can easily input IP address, network number, and other debugging parameters. For details, see the debugging software manual.

Rear panel battery replacement: First turn off the power switch, unscrew the two M3 knurled screws on the left and right by hand, then vertically unplug the upper cover of the K1-K2 circuit board, disconnect the black SM plug of the battery, replace the new battery, reinsert the SM plug, and then gently insert the K1-K2 circuit board vertically toward the pin, and finally manually tighten the two M3 knurled screws, turn on the switch, and pay attention to the whole process. The K1-K2 circuit board can be pulled out and inserted lightly. Finally, please tighten the rear cover. The actual photo is as follows:

5. On-site installation instructions

5.1. All transmitters are digitally calibrated, and different transmitters are completely consistent and interchangeable;

5.2. During transportation, all transmitter batteries are disconnected. When installing the pressure transmitter on site, you need to unscrew the back cover of the meter head and turn on the battery switch. Pay attention to tighten the sheath to prevent water leakage;

5.3. To install a cellular network wireless pressure transmitter on a pipeline or a well that is not normally open, first close the valve (needle valve or gate valve) on the pipeline where the pressure transmitter is to be installed. There are two ways to install it: (1) Screw the pressure transmitter directly into the upper port of the needle valve; (2) Screw the 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, which means the installation is qualified;

5.4. After the installation of this cellular network wireless pressure transmitter is completed, the network parameters can be set through 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 through the debugging tooling. (The transmitter is uniformly set to sleep mode or closed during the factory storage process, and it needs to be activated on site before it can be used normally.) The online list of the debugging software interface is as follows:

6. Notes

6.1. The battery model used in this product is ER34615M-3.6V38Ah; other types of batteries are prohibited.

6.2. The antenna housing of the product is made of plastic, which may cause potential danger of electrostatic charge! Avoid friction during use! Please wipe with a damp cloth when cleaning!