Test Procedure

This image is a Logic Diagram of a Safety Thermal Limit Recorder-Controller for a computer or programmable logic controller.

• When the program starts the chart motor is activated.
• If the divert micro switch is on and the divert flow is detected by the detect micro switch, a red light appears and the timing pump is powered. If the divert flow is not detected by the detect micro switch, no light appears.
• If the legal pasteurization temperature is met the, power goes to the flow control device and the flow diversion device. The micro switch is in forward flow mode, a green light appears and the frequency pen solenoid is activated to record forward flow.