49
If a start on level has been set the
Abs/%T
icon is
displayed in the centre of the screen. The instrument
will take photometric readings until the start on level is
reached. Once the absorbance/% transmittance level has
been reached the readings will be plotted on the graph.
Once the measurement has commenced it can be aborted by pressing the key below the
kinetics
measurement in progress
icon.
Depending on how many data points have been recorded,
the instrument will either return to the pre-measurement
screen or display a partial scan.
Once the measurement time is reached the experiment is
complete and the post measurement icons are displayed.
If the automatic scaling was selected the y-axis will
automatically be re-scaled.
9.5
DATA ANALYSIS
Following the completion of the kinetics measurements the post measurement icons are displayed on
the screen. These include the
statistics
for the kinetics experiment and the
kinetics moving line
. The
post measurement statistics include rate of change, start and end absorbance levels and concentration
of the sample. The kinetics moving line function enables the initial and final points of the experiment to
be set and the statistics for this part of the experiment to be analysed.
To access the statistics for the whole of the kinetics
experiment press the key adjacent to the
S
icon which
opens the statistics menu over the top of the expanded
operating menu.
The information displayed includes concentration,
absorbance per minute (rate of change), correlation
coefficient (r
2
), start time absorbance and end time
absorbance. If the operating mode selected was %
transmittance then the statistics displayed will be %
transmittance instead of absorbance.
In this menu the factor can be updated by pressing the key adjacent to the
factor
icon. The instrument
calculates the factor and saves the value in the settings. Therefore the factor value calculated can be
used in subsequent measurements to calculate the concentration of unknown samples.
To exit the statistics menu press the key adjacent to the
tick
icon.
The kinetics moving line screen can also be accessed from this menu by pressing the key adjacent to
the
kinetics moving line
icon. The kinetics moving line function enables the initial and final points of
the kinetics experiment to be set, allowing the statistics for this part of the experiment to be analysed
specifically. This function can be accessed from the statistics menu or from the expanded operating
menu by pressing the key adjacent to the
kinetics moving line
icon.
In the kinetics moving line screen the initial and final
09:02
2.500
ABS
-0.500
350
550
450nm
3.000
ABS
-5.000
0.00
10.00
5.0
s
09:02
3.000
ABS
-5.000
0.00
10.00
5.0
s
09:02
3.000
ABS
-5.000
0.00
10.00
5.0
s
09:02
0.000
ABS/m:
r2:
0s
10s
ppm
0.000
1.000
0.152
0.152
Summary of Contents for 7315
Page 1: ...Spectrophotometers Models 7310 7315 Operating Manual 731 005 REV D 06 10...
Page 2: ......
Page 74: ...SECTION 14 Declaration of Conformity 76...
Page 75: ...SECTION 14 Declaration of Conformity 77...
Page 85: ......
