Standard Control System: The Protocol 3 Tm - Despatch LCC Series Owner's Manual

C244, 320207, REV B
4.2. Standard Control System: The Protocol 3
Oven operators must have a practical understanding of the
automatic controls. These controls regulate the temperature,
Notice
provide safety features, and generally govern the consistently
uniform and satisfactory performance of the oven.
The Protocol 3™ is a microprocessor based digital temperature controller
designed for simple and flexible oven operation (Figure 5). The Protocol 3
controller operates as a dual-functioning controller/High Limit instrument. The
control portion utilizes a time-proportioning voltage signal to control heating
devices with minimal temperature fluctuations.
The High Limit portion protects the product and/or the oven from overheating. If
the product being processed has a critical high temperature limit, the High Limit
setpoint should be set to a temperature somewhat below the temperature at
which the product could be damaged. If the product does not have a critical high
temperature limit, the High Limit setpoint should be set 5⁰C to 10⁰C (9⁰F to 18⁰F)
higher than the maximum programmed setpoint at which the oven will operate.

The purchaser is responsible for setting the High Limit Control per
the instructions in this manual.
Danger!
Failure to attend to High Limit Control Warning may result in
property damage, serious bodily injury, or death.
The Protocol 3 controller provides three primary operating modes:
• Manual: Oven operates continuously at a fixed temperature until turned
off.
• Timer: Oven operates at a fixed temperature for a user-selected period,
and then automatically turns off.
• Profile: Temperatures increase or decrease as defined by 255 segments
that can be allocated to 64 ramp and soak profiles. The profiles can be
linked to provide additional temperature combinations.
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countries. No part of the contents of this manual may be reproduced, copied or transmitted in any form
or by any means without the written permission from ITW EAE - Despatch, unless for purchaser's
personal use.
LCC_LCD1-16/51 Oven Owner's Manual
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