Overview

This document provides guidelines for the PL40-O Level Transmitter, including safety instructions, installation procedures, operating conditions, troubleshooting, and maintenance. The PL40-O is a 2-wire, 4-20mA level transmitter designed for hazardous areas, ensuring accurate level measurement in various tank applications.

1. Safety Information (p.4)

• Electrical Hazards: High voltage present; ensure power isolation before maintenance.
• Intrinsic Safety Compliance: Follow ATEX & IECEx guidelines for hazardous areas.
• Anti-Static Precautions: Handle PCBs carefully to avoid electrostatic discharge damage.

2. Storage Before Installation (p.6)

• Store in a dry, covered area to prevent moisture and environmental damage.
• Inspect for physical damage before installation.

3. Description and Application (p.9)

• The PL40-O Level Transmitter consists of a transducer and a transmitter box.
• Designed for tank level measurements, including ballast, fuel oil, fresh water, and chemical products.
• Built to operate in hazardous environments with intrinsic safety certification (Ex ia IIC T6...T1 Ga).

4. Technical Specifications (p.10-12)

• Measurement Ranges: Various pressure levels up to 70 bar.
• Operating Temperature:
  • Transducer: -40°C to +125°C
  • Transmitter Box: -40°C to +85°C
• Protection Ratings:
  • Transducer: IP68 (fully submersible)
  • Transmitter Box: IP66/67 (outdoor use)
• Output Signal: 4-20mA DC (2-wire system).

5. Mechanical Installation (p.13-14)

• Mounting options:
  • Immersed mounting (ballast tank applications).
  • Side flange mounting (transducer fixed or welded).
• Isolation Valve Recommended: Install between tank and transducer for easier maintenance.

6. Electrical Installation (p.15-18)

• Transducer Cable Requirements: Must be free from damage (cracks, burns, crushing).
• Transmitter Box Placement:
  • Install outside the tank in a protected area.
  • Avoid exposure to shock, chemicals, and excessive moisture.
• Intrinsic Safety Guidelines:
  • Use an isolation barrier (KFD0-CS-Ex1.51P/2.51P) in the safety area.
  • Certified to ATEX & IECEx standards for explosion-proof applications.

7. Operation & Calibration (p.19)

• Startup Verification:
  • 3.5mA output → No signal detected.
  • 4-20mA output → Normal level or pressure reading.
  • 21mA output → Overpressure alarm.
• Calibration:
  • Factory pre-set, no adjustment needed.
  • Ensure proper specific gravity setting for accurate readings.

8. Maintenance & Troubleshooting (p.20)

• Common Issues & Solutions:
  • Indication Error: Check transducer cleanliness, zero/span settings, and venting pipe.
  • Zero Reading: Inspect power supply, isolation valve, and sensor status.
  • Maximum Reading: Likely sensor failure—requires replacement.