ELECTESLA ES-PC300 LCD Pressure Transmitter User Manual

1. Introduction

The ELECTESLA ES-PC300 LCD Pressure Transmitter is a high-performance device designed for precise pressure measurement. It integrates advanced circuit processing, temperature compensation technology, and a high-performance pressure sensing chip to convert pressure changes into linear current or voltage signals.

This product features a compact, easy-to-install design with a durable stainless steel shell, offering isolation and anti-corrosion protection. It is suitable for measuring gas and liquid compatible with the material's contact parts, including gauge, negative, and absolute pressure.

Utilizing the latest low-power microprocessor technology and advanced power management, the transmitter ensures stable display and high brightness. Its circuit assembly density is high due to imported specialized integrated circuits and SMT technology. It supports a universal two-wire loop power supply ammeter and operates in a two-wire passive working mode with ultra-low power consumption.

The ES-PC300 is fully intelligent, supporting user self-calibration and non-linear correction of displayed values. It includes reverse polarity protection, preventing damage if the current input is reversed. User calibration is supported, requiring menu access to separately collect zero position and full degree for accurate calibration.

2. Product Overview and Components

The ES-PC300 LCD Pressure Transmitter is engineered for reliability and precision. Key components and design features include:

• Housing Material: Constructed from SS304/SS316 anti-corrosive material.
• Sensing Element: Features an imported diffusion silicon chip for 8ms instantaneous response.
• Core Body: Imported core body with 0.2%FS high precision and strong anti-interference capabilities.
• Design: High-strength adhesive design ensures high pressure resistance and leak-proof operation.
• Protection: PVE engineer plastic, flame retardant, and pressure resistant components.
• Internal Wiring: Pure copper core for high melting point and high temperature resistance.
• Durability: Anti-damping design resistant to 300% instantaneous impact.
• Performance: Linearity ≤0.01%FS and stability ≥10 years.

The device also features an LCD display for clear readings and user interaction.

3. Technical Specifications

4. Setup and Installation

Proper installation and wiring are crucial for the correct operation of your ES-PC300 pressure transmitter. Ensure the power supply matches the device specifications.

4.1 Wiring Diagram

The ES-PC300 supports various wiring configurations depending on the output signal type:

• 2-Wire System (4-20mA Output):
  Connect the Power (24VDC) to the + (red wire) terminal.
  Connect the Output (4-20mA) to the - (black wire) terminal.
• 3-Wire System (0-5V/0-10V Output):
  Connect the Power + (24VDC) to the + (red wire) terminal.
  Connect the Power - (0V) to the - (black wire) terminal.
  Connect the Output (0-5V/0-10V) to the Signal (yellow/white wire) terminal.
• 4-Wire System (0-5V/0-10V Output):
  Connect the Power + (24VDC) to the + (red wire) terminal.
  Connect the Power - (0V) to the - (black wire) terminal.
  Connect the Output + (0-5V/0-10V) to the Signal + (yellow/white wire) terminal.
  Connect the Output - (0V) to the Signal - (blue/green wire) terminal.

4.2 Pressure Connection

The pressure connection thread size can be customized. Common options include M20x1.5, G1/4, G1/2, NPT1/2, and NPT1/4. Ensure the chosen thread size is compatible with your system for a secure and leak-free connection.

5. Operating Instructions

The ES-PC300 features an intuitive interface with three buttons for configuration and operation. The instrument achieves all parameter inputs and calibration data settings and collection through these buttons.

5.1 Button Functions

• Up Key (▲):
  
  • Measurement Mode: Press and hold for 5 seconds to reset the main variable.
  • Setting Mode: Short press to move the flashing bit.
• Down Arrow Key (▼):
  
  • Setting Mode: Increase the value of the setting parameters.
• SET Key:
  
  • Setting Key Function: Simultaneously press ▲ and ▼ to activate the setting key function.
  • Measurement Mode: Press both ▲ and ▼ simultaneously to enter the setting state.
  • Setting Mode: Press both ▲ and ▼ simultaneously to set or confirm parameter modifications.

5.2 Menu Navigation (LED Display 4-20mA Output)

1. Enter Setting Mode: Press and hold the “SET” button for more than 5 seconds until “0000” is displayed.
2. Change Number: Press the “SHIFT” key to change the number to “0006”.
3. Adjust Decimal Place: Short press “SET” to display “POnt”. Short press “SET” again to enter adjustment. Use “SHIFT” to change the decimal place.
4. Set 4mA Display Value (dS-L): Short press “SET” to exit, and “dS-L” will be displayed. Short press “SET” to enter adjustment. Use “ADD” and “SHIFT” to change the display value corresponding to 4mA.
5. Set 20mA Display Value (dS-H): Short press “SET” to exit, and “dS-H” will be displayed. Short press “SET” to enter adjustment. Use “ADD” and “SHIFT” to change the corresponding display value of 20mA.
6. Set Starting Drift Value (door): Short press “SET” to exit, and “door” will be displayed. Short press “SET” to enter adjustment. Use “ADD” and “SHIFT” to change the starting drift value of 4mA.
7. Exit Settings: Press “SET” briefly to exit, and “End” will be displayed. Press “SET” briefly once, and then press it again to confirm exiting the homepage.

5.3 Menu Navigation (LCD Display RS485 Output)

For RS485 LCD displays, the menu structure is as follows:

• Enter Setting Mode: Press and hold SET for ≥2 seconds to enter the Homepage, then enter Password 16.
• Baud Rate (-6PS-): Press the appropriate key to select the baud rate.
• Display Type (Ty-p/Ty-t): Select whether the homepage displays pressure (Ty-p) or temperature (Ty-t).
• Unit Selection: Choose the desired unit of pressure (temperature does not require operation).
• Modify Equipment ID (Addr): Set the equipment ID (1-254).
• Save and Exit (End): Save changes and exit.

Note: In user settings mode, if no button is operated within 60 seconds, the device will automatically exit to measurement mode.

6. Calibration and Debugging

The ES-PC300 allows for user calibration and adjustment of various parameters to ensure accuracy. The menu system is divided into “Advanced User Menu” and “Regular User Menu”, each protected by a password.

6.1 Accessing Menus

• Advanced User Menu: Entry password is “00066”. This menu allows setting the display unit and display mode.
• Regular User Menu: Entry password is “00016”. This menu is for special settings required for on-site use.
• Password Setting Menu (Lock): To enter the Lock page, press ▲ and ▼ simultaneously. Here you can set the password range (19999~99999) and enter the menu password. If the password is incorrect or there’s no key operation within 30 seconds, it will return to measurement mode.

6.2 Regular User Menu Settings

• DiSAL (Over Range Alarm Switch): Adjustable range (0-1). “0” disables the alarm, “1” enables it. A flashing prompt will be displayed if the pressure value exceeds 125% or falls below 25% of the calibration range.
• OFSt (Display Offset Value): Default is 0. This value can be adjusted to offset the displayed value.
• FiLt (Filter Constant Setting): Adjustable range (0-4), default is “2”. A larger value increases interference suppression but decreases sensitivity.
• SPAn (Sensor Sensitivity Correction Factor): Default is “1.000”. Use this to correct sensor sensitivity changes after ensuring zero point error is corrected.

6.3 Advanced User Menu Settings

• Unit (User Unit Setting): Adjustable range (0-12). Select from 12 types including MPa, KPa, Pa, bar, mbar, Psi, kg, mmHg, mm, m, °C, and none.
• -DP- (Display Resolution Setting): Sets the number of decimal places displayed in measurement mode.
• DP-L (Display Lower Range Setting): Adjustable range (-1999~9999).
• DP-H (Display Upper Limit Setting): Adjustable range (-1999~9999).
• ZERO (Zero Full Shielding Coefficient): Adjustable range (0.0~1.0). Default is “0.0” (off). A value of “0.1” means the transmitter output near zero or full point will stabilize, preventing jumping due to interference.

6.4 Production Debugging Menu

• Ad-L (Zero Calibration Point): Press ▲ and ▼ simultaneously to start collecting the current value. Press ▲ and ▼ again to confirm the collection once the value stabilizes.
• Ad-H (Full Calibration Point): Use the same collection method as zero calibration.

6.5 Exiting the Settings Menu

• End (Exit Settings Menu): Adjustable range (0-1). “0” exits without saving, “1” saves and exits.

7. Maintenance

To ensure the longevity and accurate performance of your ES-PC300 pressure transmitter, follow these general maintenance guidelines:

• Cleaning: Keep the device clean and free from dust, dirt, and debris. Use a soft, dry cloth for cleaning. Avoid harsh chemicals or abrasive materials.
• Connection Checks: Periodically inspect all electrical and pressure connections to ensure they are secure and free from corrosion or damage.
• Environmental Conditions: Ensure the operating environment remains within the specified temperature and humidity ranges to prevent damage and maintain accuracy.
• Avoid Physical Impact: While the device has anti-damping design, avoid unnecessary physical shocks or impacts to the sensor.

8. Troubleshooting

If you encounter issues with your ES-PC300 pressure transmitter, refer to the following common problems and solutions:

• Device Does Not Light Up: The meter head has reverse polarity protection. If the instrument does not light up, check the current input wiring for correct polarity. The device will not be damaged by reverse polarity.
• Flashing Prompt on Display: If the display shows a flashing prompt, it indicates an over-range condition. The pressure value may be exceeding 125% or falling below 25% of the calibrated range. Check the pressure source and recalibrate if necessary.
• Unresponsive in Setting Mode: If the device automatically exits setting mode, it is likely due to inactivity. The instrument will automatically return to measurement mode if no button is operated within 60 seconds.
• Inaccurate Readings: If readings are inaccurate, consider performing a user calibration (refer to Section 6) or checking the sensor sensitivity correction factor (SPAn) in the Regular User Menu.
• Unstable Readings: If readings are unstable, adjust the filter constant setting (FiLt) in the Regular User Menu. A higher value provides stronger interference suppression. Also, ensure the ZERO (Zero Full Shielding Coefficient) is set appropriately to prevent output jumping.

9. User Tips

• Application Suitability: This sensor is designed for general pressure measurement. It may not be suitable for high-impact pressure applications, such as those found in internal combustion engines (ICE), where sudden pressure spikes could affect its performance or longevity.
• Customization: The measuring range, thread size, output, and power supply can be customized. If you have specific requirements, contact customer service before purchase.
• Calibration Importance: Regularly calibrate the device, especially the zero position and full degree, to maintain accuracy over time.

10. Warranty and Support

For any assistance, user manuals, bulk order pricing, or technical support, please contact ELECTESLA customer service. You can reach them via online service, WhatsApp at +8615665610693, or email at sales02@jinqu-electric.com.

Please refer to the official product page or contact the seller for specific warranty terms and conditions.

11. Product Video

This video demonstrates the physical handling of the high-temperature pressure sensor, showcasing its OEM logo printing support, resistance up to 200 degrees Celsius, various thread sizes (M20x1.5, G1/4, G1/2, NPT1/4), and output options (4-20mA, 0-10V, 0-5V).