Cooling Circuit

12.1Connecting the cooling circuit

Connect the hoses of the object to be temperature-controlled to the supply and return of the respective cooling circuit.

12.2Coupling the cooling circuits

If a large amount of water is required, both supply lines and both return lines can be coupled in parallel.

12.3Filling up the cooling water

Place the container with the cooling medium in an elevated position and connect it to the connection provided for refilling the cooling water.

12.4Draining the cooling water

Drain the cooling water via one of the two cooling circuits. Connect a hose to the supply of KK1 or KK2 (cooling circuit 1 or 2) and place the hose in a collecting container. Switch on the respective pump to pump the coolant out of the tank.

12.5Replacing the pH sensor

• Drain the tank
• Disconnect the plug
• Remove the sensor

12.5.1Calibrating the pH sensor

• Select the calibration menu CAL; start the calibration with CAL
• Set the pH value of the buffer for ZERO with the arrow keys
• Immerse the sensor in test container 1 with the buffer solution (e.g., pH 7), moving the sensor gently
• Start the calibration with CAL; when CAL= ACCEPT is shown on the display and the displayed mV value is stable, accept the value with CAL
• Remove the sensor from the buffer solution, rinse it thoroughly with water and then dab it dry
• Set the pH value of the buffer for SLOPE with the arrow keys
• Immerse the sensor in test container 2 with the buffer solution (e.g., pH 4), moving the sensor gently
• Start the calibration with CAL; when CAL= ACCEPT is shown on the display and the displayed mV value is stable, accept the value with CAL
• The determined values for zero point and slope are displayed. If the values for ZERO and SLOPE are both OK, the calibration is saved as successful. If the result of the calibration is outside the tolerance limits, the error message ERR appears
• Continue with CAL to confirm the result and end the calibration (if necessary, also unsuccessfully)