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Operating Procedures | Refrigerated Circulated Water Baths

Comprehensive Guidelines on Using Your Product Safely, Effectively, and for Optimal Performance

Applicable Models:

TWBRC-24

📜 Quick Navigation

Start Up Procedure

General Controls

OMRON Controller Guide

Manual Reset Safety Thermostat

🔍 Need More Information?

📂 Getting Started

📦 Setup & Installation

🧰 Maintenance & Cleaning

🔧 Troubleshooting & Repair

📜 Warranty & Support

 


Start Up Procedure

Water Bath SocketStart-Up Process for the Refrigerated Water Bath:

  • Before proceeding, ensure that all internal and external packaging has been removed from the appliance, including tape, plastic bags, and foam pieces.
  • Ensure the heater circulator is correctly positioned in the bath and that the bath is filled to the appropriate level.
  • Take the supplied lead and plug it into the male IEC socket on the rear of the heater circulator. Next, plug the 3-pin plug into a 10A General Purpose Outlet.
  • Ensure the power and control lead is securely connected to both the heater circulator and the bath.
  • Turn the main switch on the front of the heater circulator to "ON" to start.
  • The controller will go through a warm-up period, during which all segments of the display will illuminate before showing the set temperature (SV) on the lower display and the water bath's actual temperature (PV) on the top display.

    Water Bath Switch

General Controls

Temperature Control

Press the “<<PF” button to move the cursor. The digits in the SV display will begin to flash, indicating that the temperature can be adjusted.

Use the “UP” or “DOWN” arrows to change the temperature. Once the desired temperature is set, wait a few seconds. The digits will stop flashing, confirming the entry.

Sensor Calibration

Several factors can affect the accuracy of the displayed temperature compared to the actual temperature inside the cabinet, including:

  • Sample load distribution – The load should be evenly distributed inside the bath.
  • Product temperature – At higher temperatures, heat loss from the product will be greater.
  • Sensor placement – The temperature sensor cannot be positioned at the centre of the bath, as it may be damaged.

The Omron temperature controller includes a sensor correction parameter, displayed as “iNS” (Input Shift). This parameter allows for a correction value to be added or subtracted, ensuring the displayed temperature matches the actual internal temperature.

  • The calibration sensor can be attached to the centre of the middle shelf.
  • Once the water bath has stabilised, any difference in the temperature reading can be corrected using the sensor correction parameter.
  • The calibration parameter can be accessed as follows:
    • Press PAGE to display the sensor correction parameter.
    • Use the UP or DOWN button to adjust the sensor correction.
    • After adjusting, wait for the digits to stop flashing—the screen will then display the adjusted value.
    • Press PAGE to return to the main screen.

To access the full instructions for the OMRON controller, please refer to the OMRON manual.

Manual Reset Safety Thermostat

The water bath is equipped with a non-adjustable over-temperature safety thermostat. In the event of an over-temperature condition, the thermostat will automatically isolate the heating elements to prevent overheating.

This safety feature is designed to protect the cabinet from excessive heat buildup, which may occur due to a failure of the air circulation fans or if the cabinet is overstocked, restricting airflow.

For instructions on resetting the safety thermostat, refer to the manual.