Overview

This document provides guidelines for the PL40M-U-I Pressure Transmitter, including safety precautions, installation procedures, operating conditions, troubleshooting, and maintenance. The PL40M-U-I is an intrinsically safe pressure transmitter designed for use in hazardous areas, ensuring accurate pressure and level measurements in industrial applications.

1. Safety Information (p.4-5)

• Electrical Hazards: Ensure the power supply is isolated before maintenance.
• Intrinsic Safety Compliance: Certified for Ex ia IIC T6...T4 Ga, meeting ATEX & IECEx standards.
• Anti-Static Precautions: Proper handling is required to avoid electrostatic discharge damage.

2. Storage Before Installation (p.6)

• Store in a dry, covered area and keep in original packaging for protection.
• Inspect for physical damage before installation.

3. Description and Application (p.9)

• The PL40M-U-I Pressure Transmitter measures gauge and absolute pressure in liquids and gases.
• Designed for process engineering applications, including tank level monitoring and industrial pressure measurement.
• Available with various process connections, including hygienic and threaded connections.

4. Technical Specifications (p.10-11)

• Measurement Ranges:
  • Pressure measurement: 0 to 50 bar
  • Burst pressure: up to 120 bar
• Operating Temperature:
  • PL40M-U-I: -40°C to +85°C
• Protection Ratings:
  • IP67 (dust and water-resistant).
• Output Signal: 4-20mA DC (2-wire system).

5. Mechanical Installation (p.12)

• Mounting Guidelines:
  • Secure the transmitter to the wall using M4 bolts.
  • Ensure proper cable gland installation for environmental protection.
• Electrostatic Discharge (ESD) Risks:
  • Avoid installation in areas where electrostatic charge buildup is possible.
  • Use a damp cloth for cleaning to prevent charge accumulation.

6. Electrical Installation (p.13-14)

• Precautions:
  • Ensure the power is OFF before making electrical connections.
  • Connect transducer and power supply carefully, ensuring correct polarity.
• Intrinsic Safety Requirements:
  • Must be used with an intrinsically safe isolation barrier or zener barrier.
  • Certified for Zone 0, 1, and 2 applications.

7. Operation & Calibration (p.15)

• Startup Verification:
  • 3.5mA output → No signal detected.
  • 4-20mA output → Normal pressure reading.
  • 21mA output → Overpressure condition.
• Calibration:
  • Factory pre-set, but field adjustment may be required.
  • Zero and Span calibration can be adjusted using the DIP switch and variable resistance.

8. Maintenance & Troubleshooting (p.16)

• Common Issues & Solutions:
  • Indication Error → Adjust Zero/Span settings and check specific gravity.
  • Zero Reading → Inspect power supply, isolation valve, and sensor status.
  • Maximum Reading → Possible sensor failure—requires replacement.