Operation
3-9
3-6
TC AND CONVECTORR CALIBRATION
Expose the desired thermocouple or ConvecTorr to either atmospheric pressure or to a vacuum
greater than 1.3 x 10
-1
Pa (1 x 10
-3
Torr).
Press the “Cal” key once to calibrate TC1, or twice to calibrate TC2. The respective pressure display
will flash either 1 x 10
5
Pa/7.6 x 10
2
Torr (if the TC has been reading 1.3 x 10
1
Pa/1.0 x 10
-1
Torr or
above) or 1.3 x 10
-1
Pa/1.0 x 10
-3
Torr (if the TC had been reading less than 1.3 x 10
1
Pa/1.0 x 10
-1
Torr).
Press the “Enter ” key to save the calibration point, or press “Cal” to exit the calibration procedure.
Repeat the procedure for each TC at each end point.
3-7
ACCESS CODES
The senTorr offers several hidden features available through the keypad. This provides some protec-
tion for the operator and the system by requiring knowledge of the access code for the desired func-
tion. The access code is entered through the keypad sequence “Enter” then “Units”. Use the up and
down keys to select the appropriate two-digit code, displayed in the IG readout, using the standard
parameter programming method. The codes and their respective functions are:
Code
Function
33 A
Unlock keypad (default)
27 A
Lock keypad, except for Enter, Units, and arrow keys (to allow further access code entry)
17 A
Lock keypad, except for Enter, Units, arrow, Emis, and Degas keys (to prevent
parameter changes)
81 A
Reset total system. All parameters except the baud rate settings revert to defaults, and
the ion gauge turns off
71 A
Resets TC calibrations to system defaults
61 A
Removes all set point programming.
39A
Set Bayard-Alpert parameters (sensitivity, emission current, and over-pressure shutdown) to
standard Bayard-Alpert values (default)
49 A
Set Bayard-Alpert parameters (sensitivity, emission current, and over-pressure shutdown) to
broad-range Bayard-Alpert (Varian models 564 and 580) values
79 A
Set thermocouple or ConvecTorr pressure update to slow, allowing more stable readings
through data averaging (default)
89A
Set thermocouple or ConvecTorr pressure update to fast, allowing faster response to pressure
changes
56A
Enable E02 (pressure burst) and E06 (grid error) fault protection
52 A
Disable E02 (pressure burst) and E06 (grid error) fault protection. The senTorr will override
these faults, for systems that are able to handle pressure spikes
3-8
SOFTWARE REVISION
The software revision can be displayed by pressing “Enter” then the down arrow. The revision will light
in the IG display for several seconds.
