MKS Device Dependent Messages
Chapter Seven: IEEE-488 Communications Option
114
Example 3: How To Calibrate the Null Value
Calibrating the 670 instrument involves two steps. First, use the set mode command to select the
calibration procedure. Second, issue the command to perform the calibration function to actually
initiate the calibration procedure.
Note
1. The zero feature requires an additional step. Refer to Channel-Specific
Messages, page 115, for an example explaining how to use the zero
feature.
2. The time required to complete a calibration procedure depends on the
value of the averaging entry. Refer to Table 16, page 73, for more
information.
1. Use the set mode command to select the null calibration procedure:
:sense:function null
ENTER
2. Send the perform calibration command to initiate the null calibration procedure:
:calibrate:function
ENTER
The front panel will flash the message “
CALIBRATING
” during the null calibration
procedure. Table 16: Relationship Between Averaging Entry and Calibration Times,
page 73, lists the approximate time for the null calibration.
3. Read the contents of the buffer to determine when the calibration is complete.
4. Change the mode back to pressure by sending the command:
:sense:function pressure
ENTER
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