Overview

The FLT-100R is an intrinsically safe loop-powered transmitter designed for resistance-type sensor measurements in hazardous environments (Zone 0, 1, or 2). It outputs 4-20mA signals and complies with IEC 60079-0 and IEC 60079-11 explosion protection standards.

1. Safety Information (p.3-4)

• Electrical Hazards:
  • Power must be isolated before installation or maintenance.
  • The device operates at high voltage, requiring caution.
• Electrostatic Discharge (ESD) Precautions:
  • Handle PCBs with care to prevent static damage.
  • Store PCBs in conductive packaging.
  • DO NOT install or uninstall while power is applied.

2. Storage Before Installation (p.5)

• Store in a dry, sheltered area to protect from moisture and extreme temperatures.
• Before installation, verify:
  • Physical damage, scratches, dents.
  • Bent or distorted components.
  • Connector and PCB conditions.

3. General Description (p.7)

• Designed for hazardous areas (Zone 0, 1, and 2).
• 4-20mA analog output with intrinsically safe protection.
• Resistance-type sensor input with 3-wire cable compensation.
• Plastic PBT housing with epoxy molding for durability.

4. Technical Specifications (p.8)

• Explosion Protection:
  • Ex ia IIC T6..T4 Ga (IECEx KTL 16.0016X).
  • Operating Temperature Ratings:
    • T6: -40°C to +55°C
    • T5: -40°C to +70°C
    • T4: -40°C to +85°C

5. Electrical Connection & Zero/Span Calibration (p.9-10)

• Power Terminal (+, -): Connect 12-30V DC power.
• Signal Terminal (H, C, L): Connect resistance-type sensor.
• Zero/Span Calibration:
  1. Set the sensor resistance to zero/full range.
  2. Connect a multi-meter to the power terminal.
  3. Adjust the zero (4mA) / span (20mA) potentiometer using a screwdriver.

6. Installation & Intrinsic Safety Guidelines (p.10-11)

• Installation Steps:
  1. Pass sensor wires through the central hole in the transmitter.
  2. Secure the transmitter using mounting screws.
  3. Ensure firm cable connections to avoid disconnection.
• Precautions:
  • Do not overtighten mounting screws (risk of damage).
  • Use an enclosure rated IP20 or higher for added protection.
• Intrinsic Safety Certification:
  • Must be installed with an intrinsically safe power supply.
  • Example barrier compatibility: KFD0-CS-Ex1.50P.

7. Troubleshooting & Maintenance (p.11-12)

8. Revision History (p.12-13)

• Version R3 (2025.03.03) – Third revision of the technical manual.