Thermo Scientific APEX 100, User Manual

Page: 155 / 442

Thermo Scientific APEX User’s Guide
Page 155
Setting Acceptable Limits for Phase Tracking
For this function to work, you must already have enabled phase tracking.
When the “acceptable limit for phase tracking” function has been set, as each package
passes through the search head, the package’s phase angle is measured and then
compared with the current running average for phase angle. Then, assuming that the
phase angle measurement for the package does not exceed the current running average
by ±0.30 degrees (the limit, in the screen below, for an acceptable change), this
package is passed as showing an “acceptable change” for phase angle, and the running
average updated (that is, before the next package enters the search head).
For example, if the current running average is 89.78 degrees and the limit for an
“acceptable change” is ± 0.30 degrees, the phase angle of the next package passing
through the search head must fall in the range 89.48–90.08 degrees to be accepted and
the running average updated.
Phase Angle
To set a limit for an “acceptable change” in phase angle, do the following.
1)
Highlight the “acceptable change” menu shown above.
2)
Press the Go button and an input screen appears.
Phase Tracking Limits
3)
Key in your new setting for an acceptable change in phase angle (in degrees and
hundredths of a degree).
4)
Press the Go button to save your setting and exit the menu.