Announcement: Eurotherm® Joins Watlow® - Read Press Release

Temperature Controller Makes Candy Taste Good

Opportunity:

A manufacturer requires a heating controller for candy processing. They want one control that will do several functions. The control needs to be easy to setup and use.

Problem:

The manufacturer needs to heat up their candy to a temperature of 200°F using the "ramp to set point at start" to prevent damage to the candy at start up. Once it reaches 93°C (200°F), two things need to happen:

1. Inform the operator "batch finished" via a pilot light and remain "on" until this batch is removed.
2. Automatically change the set point from 93°C (200°F) to a cooler 76°C (170°F) until this batch is drained, which could be hours later. This prevents the candy from being overcooked.

Solution:

The 988B-25BD-JARG and DB1C-3027-K200 DIN-A-MITEs®, along with a sanitary RTD probe for direct immersion into the candy was a perfect solution! Our three outputs were able to:

Output 1 - 240V control voltage to four DIN-A-MITEs wired in parallel set at 93°C (200°F).
Output 2 - 120V control to a pilot light and latch it on at 93°C (200°F), event 1 input resets it.
Output 3 - Used as an input for "event 2," which tells the control to go to an idle set point of 76°C (170°F).
Once the batch is removed and a new batch is filled, the "start batch" input needs to be pressed and the pilot light will turn off. The main set point of 93°C (200°F) is reinstalled.

Key products used for this solution: SERIES 988, DIN-A-MITE and RTD Probe