1. Features

• Pipeline temperature testing has been widely used in major oil and gas fields and other industrial temperature testing fields across the country;
• Explosion-proof, fully sealed waterproof design;
• Signal synchronous output 4～20mA, RS485, optional on-site;
• Adjustable installation direction: The display direction can be adjusted by using a union or adjusting the installation locking mechanism.

2. Technical Specifications

• Operating environment: Temperature, 40 ℃≤ Tamb ≤＋ 65 ℃; Atmospheric pressure: 80KPa ～ 110kPa ; Humidity, 5%RH ～ 95%RH
• Power Supply :24VDC
• Sensor element: Pt100
• Output signal: 4 ～ 20mA ＆ RS485
• Housing material: Cast aluminum, protection level: IP67
• Protective sleeve material: 316LSS
• Insertion depth: 90 (Equipped on outer diameter 89 pipeline), 100 (Equipped on outer diameter 114 of 4 inch pipeline), 120 (Equipped on outer diameter 159 of 6 inch pipeline)
• Process connection: Union with protective sleeve; Electrical connection: 1/2 ″ NPT(F) M20*1.5(F)
• Range: -200 ～ 600 ℃ ( Customizable ) , Accuracy grade: 0.5                                
• Dimensions: Height 210 ×Width 106 ×Depth 130 , Weight: 1kg
• Explosion-proof certification: Explosion-proof certificate number: CE18.1518 Explosion-proof mark: Ex d IIC T4 Gb

3. Dimensional Drawing

4. Installation and Debugging Instructions and Wiring Definition

4.1. All transmitters are digitally calibrated, and different transmitters have complete consistency and interchangeability.

4.2. When installing the temperature transmitter on-site, unscrew the back cover of the head, connect the cable to the electrical interface, and connect the wires correctly according to the wiring definition. After the wiring is completed, tighten the back cover to ensure waterproofing.

4.3. Installing the temperature transmitter on the pipeline (1) Pipeline shutdown, depressurization, and venting. Drill a φ26 hole on the pipeline; (2) Insert the protective sleeve from the φ26 hole to a depth of L1 ′ , and then seal and weld it to the pipeline around the hole; (3) Inject heat transfer oil into the protective sleeve, approximately 2/5 of the pipe volume; (4) Insert the temperature transmitter probe into the protective sleeve, adjust the direction of the head, tighten the union with a wrench, and restore pipeline transportation.

4.4. Wiring terminal definition:

8 Core wiring green terminal definition. (1) 1, 5 pins - 24V power supply +, 2, 6 pins - 0V power supply -, 3, 7 pins - 485_A, 4, 8 pins - 485_B.

For on-site 485 communication, pins 1234 need to be connected, 1-2 for power supply, and 3-4 for communication A-B.

For on-site 4-20mA communication, only pins 1-2 need to be connected.

(2) The main signal is a two-wire 4-20mA, RS485 interface. Note that when using RS485 and 4-20mA simultaneously, the number of digital communication networks cannot exceed 10. The RS485 interface cannot add a termination resistor, otherwise it will cause the 4-20mA current to jump, damaging the 4-20mA current signal. If only the RS485 signal is used, there is no limit to the number of parallel connections, and up to 255 units can be connected in parallel.

     Note:

     1. Currently, the drive capability of commercially available passive RS485 converters is limited, so when the number of parallel connections is large, please select an active isolated RS485 interface.

     2. Due to the parallel network, the internal board does not set the bus matching resistor for the RS485 bus, and there is no pull-up or pull-down resistor. If the RS485 interface used by the customer also does not have a pull-up or pull-down resistor, it may cause the bus static level to be uncertain, and incorrect data may be generated on the RS485 bus. Therefore, customers or system integrators should add matching resistors and pull-up/pull-down resistors to the bus externally to set the bus static state.

4.6 On-site Setting of Instrument Communication Basic Information

   Instrument The protocol is also built-in. It supports the MODBUS_RTU protocol. The software uses green, self-extracting installation technology. When used, it will automatically decompress the required dynamic link libraries, so please set this software as a whitelist in your computer's antivirus software to prevent security software from preventing the software from operating normally.

     The software supports serial ports from 1 to 15. If you are using a USB-to-serial port converter, please change the port number to within 1-15.

     In addition, after testing, the USB/RS485 converter is currently used more frequently. The USB conversion chips used in it are numerous. It has been found that the converter using the FDT232 chip needs to set the driver, otherwise the software will not be able to read the data from the transducer. The settings page is as follows:

FDT232 For the software's advanced driver settings, open it in the Device Manager, you can see a BM option. This setting should be changed to 1. Generally, the software defaults to 15, so this setting must be modified to use the serial port normally. Other USB converters with different chips have not found this problem.

1. Find Port:

     The software will automatically search for available ports on the local machine upon startup. Please select the correct port number, select the baud rate that matches the transducer, and click the search button to search for the online transducer. The search results are displayed at the bottom of the software. Lists all available port numbers on this computer. If there are dynamically plugged USB virtual ports, you can click "Find Serial Port" to update the listed information.

     2. Search Transducer:

     This is to search for online transducers. The search address range is 1-255. A prompt will appear in the status bar when found. To end the search prematurely, click again. Note: select the baud rate range. The search only targets the currently set baud rate range.

     3. Read All:

     After the search stops, the software will automatically read all parameters of the first transducer. And continuously read the alarm status bit, real-time measured value, instrument status, and ADC value. Clicking the Read All button will also update the current data.

     4. Write All:

     After all data modifications are completed, click "Write All" to save to the transducer.

     Note: The light blue text boxes on the software support customer modification of content, and the red boxes are the default data of the transducer.

Supplementary explanation:

     According to the protocol provided by the customer, the software has been represented by a separate address representation method. The data type behind the data box indicates the type of this data.

DEC indicates decimal data. HEX indicates hexadecimal data, and characters indicate text characters, which are ASCII codes. For detailed protocols and data meanings, please refer to the protocol text provided by the customer.  

4.7 Panel Button Configuration

     This circuit has three buttons and an LCD display window:

     7.1 Panel Buttons:

M The function of the key is mainly the mode key, which switches between data and menu. When the transducer is not in the setting mode, long pressing the mode button will perform the main variable zeroing function. Whether to execute needs to be selected by the S and Z keys.

S The function of the key is mainly the data addition function. In non-setting mode, long pressing the S key will enter the active transducer upper limit setting mode. At this time, pay attention to the meaningful pressure.

Z The function of the key is mainly data shift and subtraction. In non-setting mode, long pressing the Z key will enter the active zero point setting mode.

     In measurement mode, clicking the M key will enter the password setting mode, and a password needs to be set to enter the setting mode. If the password is incorrect, the transducer will exit to the measurement mode.

     The circuit board has active range migration scaling and passive range migration scaling functions. Passive setting requires the user to enter the configuration setting mode.

     The following conventions are used for key states:

S Single click of the key is referred to as: S Z key single click is: S M key single click is: M

M Long press is: ML

S Long press is: SL Z key long press is: ZL

7.2 The following is the passive configuration panel button setting process ：

     Panel Layout Diagram:

Setting Menu Flowchart:

In the END menu, press the M key to exit the setting mode and save the data. In other menus, long pressing the M key will exit the setting mode, but will not save the data.

     There are two OUT menus in the figure, one is the FIX menu and the other is output linearization.

The corresponding menu data meanings in the above setting menu:

2. Active migration and main variable zeroing

     When entering the active migration and main variable zeroing state, it needs to be in the normal working mode.

     When setting active migration, ensure that the pressure is valid. Otherwise, the output of the transducer will be abnormal.

   Main variable zeroing has a range limit. The general value needs to be around the value 0 or near the zero pressure. The limit range is 10%. Exceeding this range will not perform the zeroing operation.

3. Switch Display:

a) The main screen and sub-screen display areas of the screen have multiple display functions. The main screen displays pressure value, percentage, and current. There are three types.

b) The sub-screen displays temperature and slave address. There are two options. The temperature value comes from the temperature sensor on the circuit board.

The display switching can be performed at any time. The display method after each power-on depends on the mode value saved last time by the software. The display mode set on the panel buttons will be cleared after the next power failure.

     The upper right corner of the LCD screen has a battery power display function. The battery power has a total of 5 progress bars. The more bars, the more sufficient the battery power. The battery will automatically cut off the output when the battery voltage is below 3.0V.

This transmitter uses a dual power supply system. In addition to the normal power supply, there is also a built-in battery power supply mode. When the battery power of the transmitter is turned on via the SW switch, the transmitter operates in battery power mode. For example, when the built-in battery capacity is 2000 mA/h, the maximum operating time of the unit on battery power can reach 300 hours, which is approximately 12.5 days. Regardless of whether there is a built-in battery, if the external power supply is connected, the instrument will automatically prioritize the use of the external power supply and output a 4-20 mA current signal.