9
C4 Manual Rev 7.5.2
1. INTRODUCTION
This manual describes the operating procedures for the Sigma Systems Models C4
& CC-3
.5
Controllers, microprocessor based controllers and control communications
interfaces for the family of Sigma Systems temperature chambers and thermal
platforms.
1.1 Models C4 & CC-3
.5
Explained
The models C4 & CC-3
.5
controllers are successors to the model CC-3.
The model C4 is a completely redesigned controller that uses a
completely different and more modern set of internal components with
a new processor and completely new firmware. Model C4 controllers
are only available as new products from Sigma Systems.
The model CC-3
.5
is a hybrid upgrade controller that uses only the
digital circuitry of the model C4. It is made by substituting the C4
digital p.c. board (known within Sigma Systems as the “CPU board”, or
the “A” board) for the CC-3's “A” board. The upgrade from CC-3 to
CC-3
.5
also includes a few small modifications to other internal
components. The power supply, power switching, analog, and front
panel components of the CC-3 remain. Model CC-3
.5
controllers are only
available as the product of upgrading a CC-3 controller.
From a functional perspective, models C4 & CC-3
.5
are identical because all of the
functionality of the controllers is defined by the processor, bus interface components,
and firmware... all of which are integral with the C4 “A” board. The C4 analog and
front panel components that remain unique to the C4 (not included in the CC-3
.5
upgrade from CC-3) provide slightly better accuracy and substantially better noise
and static immunity.
For the balance of this manual, the term C4 will mean to
include both the model C4 controller and the model CC-3
.5
controller. In the event that there is a difference between
the two models, that difference will be explicitly detailed.
