[HX-TEDO-250209-002] Tank Remote Sounding (Electro-Pneumatic Type) System Manual R8

Overview

The Electro-Pneumatic Tank Remote Sounding System is designed for precise level measurement in ballast and oil tanks, as well as draft level detection. It utilizes hydrostatic pressure measurements and converts pneumatic signals into electrical signals for monitoring.

1. Safety Information (p.4-5)

Electrical Hazards: Disconnect power before maintenance.
Anti-Static Precautions: Avoid handling PCBs without proper grounding.
Storage Precautions: Keep the unit dry and protected from extreme temperatures.

2. System Components (p.10-14)

2.1 Composition Type Pneumatic Modulator (CT-100M-R1)

Converts liquid pressure into a 4-20mA electrical signal.
Air Pressure: 4.5 kg/cm².
Output: 4-20mA, 2-wire DC signal.

2.2 Dual Check Type Safety Chamber (SC-100F)

Prevents liquid ingress into signal lines.
Max Working Pressure: 10 kg/cm².

2.3 Pneumatic Indicator (CT-180)

Displays tank level based on hydrostatic pressure.
Does not compensate for ship trim and heel angles.

2.4 Air Supply Unit (AP-ASB2000)

Regulates air pressure at 4.5 kg/cm².

2.5 Optional Components

Pressure Switch (CP-100PS): Triggers alarms when levels exceed limits.
Special Air Purge Unit: Ensures accurate readings by preventing liquid entry.
I/I Converter (HIC-100): Isolates input/output 4-20mA signals for noise reduction.
Analog Input Module (DL-1100): Provides 8-channel analog input for monitoring.

3. Operation & Calibration (p.15-24)

3.1 Working Principle

Uses hydrostatic pressure to determine liquid levels.
Converts pneumatic signals to 4-20mA electrical output for monitoring.

3.2 Calibration Procedures

Pneumatic Modulator Flow Rating: Ensures accurate response times.
Gauge Saver Setting: Prevents excessive pressure damage.
P/I Converter Calibration: Adjusts zero & span settings using a pressure calibrator.

4. Troubleshooting Guide (p.25-26)

Issue	Cause	Solution
Zero Point Offset	Leak in purge line	Check for leaks, reset zero
Incorrect Level Reading	High flow rate, line blockage	Adjust flow, clean blockage
No Response	No air supply, electrical fault	Verify power & air pressure
Unstable Readings	Condensation in lines	Open bypass valve to stabilize

5. Storage & Maintenance (p.19-20)

Store in a dry, vibration-free environment.
Regularly inspect air lines and electrical connections.
Ensure all system components are securely mounted.