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9.8 Controller Configuration
The controller has a number of configuration and operating options and calibra
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tion parameters which are programmable via the front panel. These are ac
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cessed from the secondary menu after the proportional band function by
pressing “SET”. Pressing “SET” again enters the first of three sets of configu
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ration parameters: operating parameters, serial interface parameters, and cali
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bration parameters. The menus are selected using the “UP” and “DOWN” keys
and then pressing “SET”. (See Figure 4 on page 36.)
9.9 Operating Parameters
The operating parameters menu is indicated by,
PAr
Operating parameters menu
The operating parameters menu contains the High Limit, Stir Speed, and Cool
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ing parameters.
9.9.1 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.
HL High Limit parameter
Press “SET” to enable adjustment of HL.
HL Flashes “HL” and then displays the setting
H=100 Current HL setting
Adjust the HL parameter using “UP” or “DOWN”.
H=90 New HL setting
Press “SET” to accept the new temperature limit.
9.9.2 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.
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9 Controller Operation