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HARTSmart boardKey operation instructions

• Zero point and range migration

Zero point migration: Press simultaneouslyAfter 6 seconds of pressing the S and Z keys (S on the left and Z on the right), the display screen will show "Hart", indicating that the zero and range adjustment status has been activated; Press the Z key again for 5 seconds, and the "Hart" character on the display screen will disappear. The zero point migration will be successful and the activation state will be exited.

Range migration: Press simultaneouslyAfter 6 seconds of pressing the S and Z keys (S on the left and Z on the right), the display screen will show "Hart", indicating that the zero and range adjustment status has been activated; After confirming that the pressure of the device at this time is the range pressure, press the S key for 6 seconds. At this time, the "Hart" character on the display screen disappears, the range migration is successful, and the activation state is exited.

Note: After entering the activation state, if you do not want to make adjustments, you can press both buttons simultaneouslyAfter releasing the S and Z keys, the "Hart" character on the display screen disappears, indicating that the activation state has been exited. Alternatively, it can be powered on again.

• Parameter Settings

2.1 Key Description: Pressing the S key and Z key simultaneously is the exit key; The exit key is only effective when the key is released. Pressing the Z key for 4 seconds is the shift key.

2.2 Parameter Description

pressAfter pressing the S key for 6 seconds, the display screen will show "PASS". Press the Z key again, the display screen will show the value and the cursor will flash. The flashing bit is the modification bit. Press the Z key to add 1 to the number in that bit but do not carry it. Press and hold the Z key for 4 seconds to shift the cursor. Modify this value to 160 according to the above operation method, and then press the S key to enter the next parameter adjustment program. The meanings of each parameter are as follows:

Parameter prompt	Numerical value	significance
	XXXXX	Password verification, password is 160
	XXXX. X	Process quantity corresponding to 20mA (full-scale value)
	XXXX. X	Process quantity corresponding to 4mA (zero point value)
	XXXXX	Transmission function,=0 represents linearity,=1 represents square root
	XXXXX	Display units: 1=inH2O (header not displayed), 2=mHg (header not displayed), 3=ftH2O (header not displayed), 4=mm, 5=mmHg (header not displayed), 6=Psi, 7=bar, 8=mbar (header not displayed), 9=KPa (header not displayed), 10=KPa (header not displayed), 11=Pa, 12=Kpa, 13=KPa (header not displayed), 14=KPa (header not displayed), 15=MPa, 16=mA, 17=%, 18=℃, 19=S, 20=m3/h, 21=t/h
	XXXX. X	Damping time, with a maximum limit of 30 seconds during program execution
	XXXXX	Low point adjustment. Adjust the process quantity to the current input value. Press the Z key to modify the low point fine adjustment pressure value; Do not press the Z key when making no adjustments, press the S key directly to enter the next parameter.
	XXXXX	Fine tune the high point. Adjust the process quantity to the current input value. Press the Z key to modify the low point fine adjustment pressure value; Do not press the Z key when making no adjustments, press the S key directly to enter the next parameter.
	yES/no	Hart three-point linearization and fine-tuning data initialization

Shortcut keys: pressPress the Z key for 6 seconds, which is the zero adjustment command.

If the on-site data is scrambled by the user. Press and hold after turning off the powerPress the "S" button to power on again, and release the "S" button after the startup is complete. Can restore manufacturer settings.

HARTMulti functional circleBoard usage instructions

Our company'sHARTMulti functional circular plates can be used in conjunction with various sensors, such as capacitive film pressure sensors, diffused silicon pressure sensors, and ceramic capacitive pressure sensors. Integrated high-precision with backlight5Digital LCD display, * followingHARTFieldbus protocol. Multi point linear correction and precise digital temperature compensation. The two buttons on the panel not only allow for zero and range migration, but also add parameter setting functions. When there is no communicator on site, the device can still be adjusted. The transmitter manufactured using this circuit board only needs to be used for user maintenanceHARTThe three-point linearization command and sensor fine-tuning command can linearize the device to meet usage requirements.

Figure (1) Motherboard+Signal conditioning board

• Hardware usage instructions

1Power supply：12~36VDC，HARTFoundation forHARTThe power supply of the device has the following requirements:

Figure (2)HARTPower parameters of the circuit

2Maximum load resistance: RL=(VS–12V)/0.023A

Where:RL——Maximum load resistance, unit: Ω; During communication,RLFor:200Ω~1000Ω)

VS——Power supply voltage, unit:V

3Operating temperature range:-40~+85℃

4Start time：<3second

5Damping：032second

6Output signal: Two line system4~20mAOverlay on DC signalFSK(Frequency shift keying)Digital signals (andHARTCompatible). Users can choose between linear output or square root output.

7Wiring method：

• Wiring method of capacitive film box pressure sensor

When using a capacitive film box type pressure sensor, the wiring of the entire machine should be routedHARTMulti functional motherboard and signal conditioning small

Board composition. The sensor output line is connected to the signal conditioning board, which is installed in the reserved cavity of the sensor.

There is already a temperature sensing diode soldered on the small board. If the sensor has a built-in temperature sensing diode and the output line is connected to the temperature sensing diode on the small board

The diode's+-Please remove this diode at the extreme time. The power input terminal on the motherboard has been integratedLCπ - shaped filter, variable

Filters do not need to be installed inside the terminal box of the transmitter. The wiring terminals are shown in Figure (2):

Figure (2)

2)Wiring method of diffusion silicon pressure sensor

When using a diffused silicon pressure sensor, only the entire circuit is usedHARTMulti functional motherboard. Sensor connection

Connect the wire to the motherboard according to the sensor output terminal nameJ2The corresponding solder pads. Constant current source power supply,JP1，JP6Short circuit, other open circuits. Wiring according toJ2instruction The wiring terminals are shown in Figure (3):

Sensor earth shielding wire and motherboard----The copper pillars of the shell are connected. Integration of sensor and motherboard connection endLCFilter, effectively blocking interference signals introduced by sensors. At the same time, the power input terminal on the motherboard is also integratedLCπ - shaped

Figure (3)

Filter to block interference signals introduced by power lines.

Little tip:Using a gauge pressure sensor0~-XX KpaWhen using a vacuum transmitterOUT+TheOUT-Swap the two wires and do more at the same time

A few linearization points (because the sensor manufacturer only linearizes in the forward direction, the linearization is poor in the reverse direction, but more linearization points can be achieved)

To meet the requirements of high precision.

3)Wiring method of ceramic capacitive pressure sensor

When using ceramic capacitive pressure sensors, only the entire circuit is usedHARTMulti functional motherboard.JP1，JP5Short circuit, if high constant voltage is required, can be directly connected to3VBalance the pressure. The rest are open. Wiring according toJ2Instructions, on the motherboardOUT-andIN-Short circuit and connect the sensorCOM（IN-）Lead wires.

2、 Communication connection method

This product * followsHARTCommunication standards include upper computer communication software and handheld communicators for communication with on-site equipment. Upper computer software supportWIN9X/METheWIN2000TheXPAnd supportUSB----RS232converter; When using the upper computer software, it needs to be equipped withHARTdedicatedMODEMHandheld communicator usage2section5High energy alkaline battery, capable of continuous operation3Above days (none)LCDWhen backlit. The specific wiring is shown in the following figure, whereHART_MODEMThe two signal terminals of the handheld communicator can also be connected to250Ω resistor at both ends.

• Installation and use of upper computer software

3-1Software installation

Open the software package and run itSETUP.EXEThe software will automatically install to:\\\\Programe\\Hart3351\\Hart3351under the directoryDuring the installation process, if prompted to enter the serial number, please enter any number. After installation, run the above directoryHart3351.exeJust follow the prompts to apply for a running password. This software supportsWIN9X/METheWIN2000And on laptopsUSBMouth turningRS232converter. When software needs to be upgraded for other reasons, simply update the new versionHart3351.exeCovering the originalHart3351.exeJust enough.

3-2Serial port settings

double-clickHart3351.exeThe file will display the running interface as shown in Figure (6), according to your requirementsPCMachine andHART_MODEMThe connection status, click on itThe serial port number in the "Serial Port Selection" selection box will change from gray to black solid color for commonly used buttons on the interface if the device is connected normally, and the corresponding parameter values will appear. Otherwise, it will indicate "Instrument not responding!", as shown in Figure (7).Note: In future software versions, the interface may differ, but the functionality and usage methods will remain the same.

appearWhen the instrument does not respond! ", please check if the instrument wiring is normal and if the circuit current is normal. If the above situation is normal, press the "Cancel" button to close the dialog box as shown in Figure (7), and then click the "Short Frame Address" button to open the dialog box(See Figure 8)Click the "Short Frame Address Search" button in the middle, and the program will automatically search for the short frame address0~15On site equipment. After searching, click the "Return" button. When this software starts running, it uses the default short frame address0If the short frame address of the on-site equipment is not0Please follow the above steps to operate the components.

Due to the lack of a laptopRS232Mouth, need to purchase separatelyUSBturnRS232converter. After connecting the converter, please install the driver program on the CD that comes with the converter, and then find the serial port number of the converter.The search method is briefly described as follows: right-click on the desktop“My Computer”Icon, click in the menu“attribute”In the appearance“System Properties”Select in the settings dialog box“Equipment Management”Tab（WIN2000Then it is“Hardware Device Manager”Double click on the installed converter device in the dialog box that appears, and then search for the device used in the dialog box that appearscom口。runHart3351.exeAfter the file, click on itSelect the corresponding serial port number in the "Serial Port Selection" box.

3-11Production operation process:

current calibrationtoMulti-point linearizationto temperature compensation to Change the range, damping, display unit, etc. as neededtobackuptoend

Data initialization

When making a new board, this step can be skipped. If the circuit board has already been calibrated in conjunction with the sensor, data initialization can be used to clear the data and perform a new calibration.inEnter password in the value box5567Click the 'Unlock' button; Then click the "Data Initialization" button, and the "Sensor Working Mode" dialog box will appear. After selecting the corresponding working mode and sensor code (as shown in Figure 11), the "Download" button changes from gray to black entity. Click the "Download" button and wait for the "Data is being downloaded" box to display in the "Information" box. Please wait…”After the information disappears, click the "Next" button and follow the prompts to proceed.Attention: During this operation, if the program deadlocks and the dialog box cannot be closed, please press“Ctrl+Alt+Del”Press the key to end the currently running program in the "Close Program" dialog box that appears.

3-6Multi point linearization

clickClick the "Multi point Linearization" button, select the appropriate number in the "Sensor Working Mode" dialog box, and then click the "Download" button (as shown in Figure 11). After downloading, click "Next", and the dialog box shown in Figure (12) will appear. If the dialog box covers the original dialog box“ADPlease move the mouse to the top of the "Multi point Linearization" dialog box, hold down the left mouse button, move the dialog box to the appropriate position, release the left mouse button, and then fill in the actual measurement value according to the content in the dialog box. After completing all measurement points, click the "Download" button. After downloading, click the 'Return' button. If there is some deviation between the displayed pressure and the standard source,It may be that the zero point tracking function is working.Just click again. click”Read parameters”Read the parameters available for download.

Tip: Multi point linearization data can be obtained by clickingADAdd the value button to the dialog box, download and return.

Figure (12)

current calibration

clickThe "current calibration" button appears as shown in Figure (13)“4mAIn the "Current Calibration" dialog box, refer to the standard ammeter and enter the current value shown on the ammeter. Fill in the following informationmASpace, as shown in the figure, click“DAAdjust "button, the ammeter should display at this time4mA.If the adjustment is not in place, you can input the actual current value of the ammeter again and adjust it once. After completion, click "Next" to enter20mAAdjust the interface, as shown in Figure (14), according to4mACalibration method, adjust the current to the correct position.

Figure (13)

Figure 14

3-7Temperature compensation

clickThe "Temperature Compensation" button displays a dialog box as shown in Figure (13). At room temperature, first download the temperature compensation data to the circuit board. Place the cursor in the corresponding box of the room temperature line and click to retrieve it“ADThe "Value" and "Pressure Full" boxes are filled with the full range pressure and then clicked to select“ADValue ", if pressure saturation compensation is not performed, it can be filled in the" Pressure saturation "box65525After filling in as shown in Figure (13), click the download button for this line. Download the temperature compensation data at room temperature to the circuit board. Similarly, the pressure compensation data for low and high temperatures can also be downloaded as described above. When there is pressure compensation data for high temperature, it will automatically compensate after downloading,View compensation effect.click”Read parameters”Read the parameters available for download.

thirteen

Performance parameter settings

The "Performance Parameters" dialog box is mainly used to set damping time, output type, and unit. Click the 'Download' button to proceed. After being set correctly, the small signal cutoff function refers to the process of4mAThe current value for cutting up and down.Cut off the value as a percentage of the range. Click to read,Enter the cut ratio and download it.

data backup

Enter in the password box”5567”,then”data backup”The button turns black and becomes available. Click to bring up the dialog box as shown in the figure, then click 'Yes'. If the on-site data is scrambled by the user. After turning off the power, press and hold the "S" key to power it back on. Once the startup is complete, release the "S" key. Can restore manufacturer settings.

3-3TheHARTThree point linearization (not required for manufacturer calibration)

clickPress the "Instrument Characterization" button to bring up the dialog box shown in Figure (9), and then follow the prompts step by step.

Attention: Please follow the prompts to apply the appropriate pressure to the transmitter, otherwise the device will not function properly and may need to be re initialized with data.

3-4Sensor fine-tuning (not required for manufacturer calibration)

clickThe "Sensor Fine Adjustment" button will display a dialog box as shown in Figure (10), and then follow the prompts to gradually operate.

3-8Three point linearization and fine-tuning data initialization (not required for manufacturer calibration)

inEnter password in the value box8888Click the 'Unlock' button; At this point, press the 'User Data Reset' button

Button activation. Click in the dialog box that appearsIf the 'Yes' button is pressed, thenHARTThe three-point linearization and fine-tuning data are reset.

Figure (20)

3-7Sensor type and amplifier gain settings

clickClick the "Multi point Linearization" button and select the working mode option in the displayed sensor working mode dialog box (as shown in the figure below), then click on the corresponding sensor type. Click on the sensor code option and select the appropriate sensor code. For capacitive film box pressure sensors, the code is0~9Representing different working ranges; At this time, other sensors should select the corresponding gain. When selecting "default gain", the gain will be set according to the program default value. Users only need to select the 'default gain', and can choose the appropriate gain value for special applications.

Figure 18 Figure 19

HARTSmart boardthreeKey operation instructions

• Zero point and range migration

Zero point migration: Press simultaneouslyAfter 6 seconds of pressing the S and Z keys (S on the left and Z on the right), the display screen will show "Hart", indicating that the zero and range adjustment status has been activated; Press the Z key again for 5 seconds, and the "Hart" character on the display screen will disappear. The zero point migration will be successful and the activation state will be exited.

Range migration: Press simultaneouslyAfter 6 seconds of pressing the S and Z keys (S on the left and Z on the right), the display screen will show "Hart", indicating that the zero and range adjustment status has been activated; After confirming that the pressure of the device at this time is the range pressure, press the S key for 6 seconds. At this time, the "Hart" character on the display screen disappears, the range migration is successful, and the activation state is exited.

Note: After entering the activation state, if you do not want to make adjustments, you can press both buttons simultaneouslyAfter releasing the S and Z keys, the "Hart" character on the display screen disappears, indicating that the activation state has been exited. Alternatively, it can be powered on again.

• Parameter Settings

2.1 Key Description: The M key is the menu key; Press the S key to shift, and press the Z key to add 1 to the current digit; Simultaneously press the S key and Z key to exit; The exit key is only effective when the key is released.

2.2 Parameter Description: Press the M key for 4 seconds to enter the password entrance of the secondary menu. The display screen will show "PASS". Press the Z key again, and the display screen will show the value 168 with the cursor flashing. The flashing bit is the modification bit. Press the Z key to add 1 to the number in that bit but do not carry it. Press the S key to shift. Modify this value to 160 according to the above operation method, and then press the M key to enter the next parameter adjustment program. The meanings of each parameter are as follows:

Parameter prompt	Numerical value	significance
	XXXXX	Password verification, password is 160
	XXXX. X	Process quantity corresponding to 20mA (full-scale value)
	XXXX. X	Process quantity corresponding to 4mA (zero point value)
	XXXXX	Transmission function,=0 represents linearity,=1 represents square root
	XXXXX	Display units: 1=inH2O, 2=mHg, 3=ftH2O, 4=mm, 5=mmHg, 6=Psi, 7=bar, 8=mbar, 9=g/cm2，10= kg/cm2，11=Pa，12=Kpa，13=torr，14=rtm， 15=MPa，16=mA，17=％，18=℃，19=S，20=m3/h
	XXXX. X	Damping time, with a maximum limit of 30 seconds during program execution
	XXXXX	Low point adjustment. Adjust the process quantity to the current input value. Press the Z key to modify the low point fine adjustment pressure value; Do not press the Z key when making no adjustments, press the M key directly to enter the next parameter.
	XXXXX	Fine tune the high point. Adjust the process quantity to the current input value. Press the Z key to modify the low point fine adjustment pressure value; Do not press the Z key when making no adjustments, press the M key directly to enter the next parameter.
	yES/no	Hart three-point linearization and fine-tuning data initialization
		K value. When used as a flow unit, the displayed value on the LCD screen can correspond to the required value for full-scale display of the measurement range.
		Data recovery. When the value is 0, it is not tracked, and when the value is 1, zero point tracking takes effect

Shortcut keys: pressPress the Z key for 6 seconds, which is the zero adjustment command.

If there is data misoperation and disorder on site. Press and hold after turning off the powerPress the "S" button to power on again, and release the "S" button after the startup is complete. Can restore manufacturer settings.