Fathom QiQuac M5, Руководство по эксплуатации

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e. Use 3rd U/S BG: This setting will apply to whichever channel is
currently displayed. If Ch2 is active, this will be set to 1 for both
Ch0 and Ch1 and the Ch2 trace will be adjusted by transit time and
delta ECT to estimate the BG ECT over the course of the measure-
ment. If Ch2 is displayed, the text will become “Use Ch2 AS 3U/S?”
and the user can chose to use Ch2 as the 3rd U/S probe or the 3rd
D/S probe. Setting CH2 to 0 will also set CH0 and CH1 to 0. If CH2
is 0, it will be used as the 3rd D/S probe and the AvgQ will include
CH2, as well as included in the calculation of QAvg Unc.. If the user
wishes to use the probe currently set to Ch2 as Ch1, that change
can be made in Setup>Device Settings>Set Ch1 SN. Ensure that no
two Channels have the same SN.
f. Hold to Restart: Push and hold to restart all the calculations as-
sociated with the SDIQ, and also reset the display. There are two
useful situations for this: 1. If you accidentally leave the probes in
the calibration flask when you hit the button to start an SDIQ, you
can move the probes to their appropriate place, then Restart SDIQ,
or 2. If you are performing multiple injections and would like to
process all measurements within a single file, you can record the
SDIQ values during the measurement, then select Restart SDIQ to
begin the next measurement.
g. Adj Y-Axis: Turn the dial to adjust the Y-Axis Max, push the button
to accept, then adjust the Y-Axis Min and push to accept. Use this
feature to zoom in on the BG_ECT near the end of an SDIQ.
h. Return to SDIQ: Select to return to the SDIQ with no changes.
i. Hold to Cancel: Push and hold to stop logging without writing the
summary SDIQ stats to the Summary file or displaying a Summary
card. All data is still logged to the SD Card and can be post-processed.
18. After the measurement is finished the Q+/-Uncertainty for each channel
is displayed. These will be written to the SD card with a timestamp. The
displayed uncertainty is the 95%Confidence Interval. The measurement
is graded by both the individual QUnc. and the %DQ
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. Feedback on the
measurement is also offered. Push the button to return to the main menu.
Determining the BG
ECT for Low Dosing
There are 3 methods by which the QiQuac can determine the BG ECT during a
measurement, equally, there are 3 methods by which the uncertainty on the
measurement can be determined. These are
1. the average of Pre- and Post- BGECT,
2. the regression line determined by the Pre-BGECT (or Pre- and Post-
together if uncertainty falls below the Snap Tolerance) and
3. the transposed 3rd U/S Probe (CH2).
19 Grade A is assigned if QUnc. for CH0 and for CH1 and %DQ are all less than Grade A Thresh%, likewise for Grade B. Grade C is at least one of
these three metrics is greater than Grade B Thresh %. These Thresh values can be changed in SDIQ Settings.