Controller Configuration; Operating Parameters; High Limit; Low Limit - GE CTR 80 User Manual

9 Controller Operation
9.8
9.9
9.9.1
9.9.2
42

Controller Configuration

The controller has a number of configuration and operating options and calibra-
tion parameters which are programmable via the front panel. These are ac-
cessed from the secondary menu after the proportional band function by
pressing "SET". Pressing "SET" again enters the first of three sets of configu-
ration parameters: operating parameters, serial interface parameters, and cali-
bration parameters. The menus are selected using the "UP" and "DOWN" keys
and then pressing "SET". (See Figure 4 on page 36.)

Operating Parameters

The operating parameters menu is indicated by,
Operating parameters menu
PAr
The operating parameters menu contains the High Limit, Stir Speed, and Cool-
ing parameters.

High Limit

The High Limit Parameter adjusts the upper set-point temperature. The factory
default and maximum temperature are set to 100°C. For safety, a user can ad-
just the High Limit down so the maximum temperature set-point is restricted.
High Limit parameter
HL
Press "SET" to enable adjustment of HL.
HL Flashes "HL" and then displays the setting
Current HL setting
H=100
Adjust the HL parameter using "UP" or "DOWN".
New HL setting
H=90
Press "SET" to accept the new temperature limit.

Low Limit

The Low Limit (LL) Parameter adjusts the lower set-point temperature limit.
The factory default and minimum temperature are set to –90°C. For safety, a
user can adjust the Low Limit up so the minimum temperature set-point is
restricted.