JRCS JSTD-M15A

JRCS JSTD-M15A

Product Introduction JSTD-M15A is a marine temperature indication and control instrument manufactured by JRCS (Japan Radio Co.) of Japan for ship engine room monitoring systems. The instrument receives temperature sensor signals, displays temperature, and outputs control signals to temperature control valves or heaters with marine anti-vibration, anti-humidity, and anti-salt design. Used for temperature monitoring and regulation in ship engine rooms, cargo holds, and tanks. Panel-mount with CCS classification certification.

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Description

JRCS JSTD-M15A

Technical Specifications

  • Instrument type: Marine temperature indication controller
  • Input: Pt100 RTD or thermocouple
  • Measuring range: Selected by sensor
  • Display: Pointer/digital temperature readout
  • Output: Relay or 4 to 20 mA control output
  • Setting: Panel pushbuttons/potentiometer
  • Supply: AC24 V / DC24 V marine
  • Accuracy: 1.0 class
  • Temperature: -10 °C to +55 °C
  • Storage: -25 °C to +70 °C
  • Humidity: 5 % to 95 %, non-condensing
  • Protection: IP55 (front panel)
  • Installation: Panel flush-mount
  • Certification: CCS

Functional Features

  • Marine temperature monitoring and control in one unit
  • Pt100 or thermocouple input
  • Temperature limit alarm relay output
  • Control output to temperature valves
  • IP55 front panel resisting humid salty engine rooms
  • Marine anti-vibration design
  • Adjustable upper/lower alarm limits
  • Real-time temperature display
  • Marine wide-voltage supply
  • Long-term reliable in harsh marine environment

Application Scenarios

  • Ship engine room temperature monitoring
  • Ship cargo hold and tank temperature monitoring
  • Ship cooling water temperature control
  • Ship fuel heater temperature control
  • Offshore platform temperature monitoring systems

Materials and Construction

  • Front panel: Corrosion-resistant metal panel with glass dial
  • Housing: Die-cast metal with anti-corrosion paint
  • Seal: Silicone rubber gasket
  • PCB: FR4 board with conformal coating
  • Mechanism: Pointer movement or digital display module
  • Relay: Marine-grade electromagnetic relay
  • Terminals: Marine waterproof terminals

Structural Features

  • Panel flush-mount instrument structure
  • Front panel integrates temperature dial, adjustment knob, and LEDs
  • Rear housing terminals for wiring
  • Gasket sealing panel-to-cabinet
  • Internals vibration-hardened
  • Marine metal housing anti-corrosion coating

Working Principle The Pt100 or thermocouple sensor signal enters input terminals; measurement circuitry converts sensor signal to temperature and drives the display mechanism. Comparison circuitry compares actual temperature to setpoint; exceeding limits triggers alarm relays. In control mode, output circuitry emits 4 to 20 mA proportional to deviation to control external valve or heater, maintaining temperature at setpoint.

Installation Requirements

  • Panel cutout flush-mount on console
  • Install gasket completely for IP55
  • Connect sensor compensating wires per drawing
  • Route control output to control valve
  • Marine power supply
  • Temperature -10 °C to +55 °C
  • Calibrate temperature range after power-up
  • Mount away from vibration and heat radiation

Precautions

  • Sensor compensating wire polarity must be correct
  • Do not short control output
  • Periodically calibrate temperature accuracy
  • Replace cracked front glass promptly
  • Store spares in dry moisture-proof packaging
  • Disconnect sensor and supply before service

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