GE CTR 80 User Manual

9.8 Controller ConfigurationThe 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 bypressing “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” keysand then pressing “SET”. (See Figure 4 on page 36.)9.9 Operating ParametersThe operating parameters menu is indicated by,PAr Operating parameters menuThe operating parameters menu contains the High Limit, Stir Speed, and Cool-ing parameters.9.9.1 High LimitThe High Limit Parameter adjusts the upper set-point temperature. The factorydefault 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 parameterPress “SET” to enable adjustment of HL.HL Flashes “HL” and then displays the settingH=100 Current HL settingAdjust the HL parameter using “UP” or “DOWN”.H=90 New HL settingPress “SET” to accept the new temperature limit.9.9.2 Low LimitThe Low Limit (LL) Parameter adjusts the lower set-point temperature limit.The factory default and minimum temperature are set to –90°C. For safety, auser can adjust the Low Limit up so the minimum temperature set-point isrestricted.429 Controller Operation