Cryo-con 24C User Manual page 60

Cryo-con Model 24C
CalGen Sub-menu
Selection of the CalGen field initiates the calibration curve generator feature. This
feature is described in the section
Setting a Temperature Alarm
The Alarm lines are used to setup alarm conditions. The Model 24C allows alarm
conditions to be assigned independently to any of the input channels.
High temperature and low temperature alarms may be entered and enabled. Note
that there is a 0.25K hysteresis in the assertion of high and low temperature alarms.
Alarm conditions are indicated on the front panel by the Alarm LED and various
display fields. They are also reported via the remote interfaces.
When the audible alarm is enabled, a high-pitched buzzer will sound when an alarm
condition is asserted.
The Model 24C supports latched alarms. These are alarms that remain asserted even
after the condition that caused the alarm has been cleared. To clear a latched alarm,
first press Alarm to view the Alarm Status Display and then press the Home key to
clear.
Loop Configuration Menu
These menus contain all of the user-configurable parameters for the selected control
loop.
The Loop 1 menu is used to
perform the setup of the
primary 25/50 Watt heater
output. This display was
designed to provide all of the
information required to tune
heater parameters and is
rather complex.
Loop #1 and #2 menus can be accessed directly from the front panel. Loop #3 and #4
can be accessed by first pressing the Options key.
When the cursor is on the top line, the user can scroll through all of the control loop
menus by pressing the + or
0 keys.
54
Using CalGen.
Loop 1A:Sample Holder
Set Pt:300.000K
Pgain: 5.0000
Igain: 60.000S
Dgain: 7.5000/S
Pman: 5.0000%
Type: Man
Input: ChA
Loop 3D:Booster Supply
Set Pt:300.000K
Pgain: 5.0000
Igain: 60.000S
Dgain: 7.5000/S
Pman: 5.0000%
Type: Man
Input: ChD
Front Panel Menu Operation
A: 1.234K
1-Off-Low -Htr-Off
Range: LOW
PID Table index: 1
W
Htr Load: 50
Next
D: 211.234K
3-Off-Low -Htr-Off
Range: 10VDC
PID Table index: 1
Htr Load: N/A
Next