Jenway 7315 Manual Italian - Manual (Page 34)

34
To change the maximum absorbance or % transmittance
value press the key adjacent to the maximum y-axis
value, this opens a number entry screen. Use the keys
adjacent to the
arrow icons to increase or decrease the
number. To change the sign press the key below the + or
- icon. Repeat presses will cycle between + and –. Once
the required absorbance or % transmittance value has
been entered press the key adjacent to the
tick icon.
7.3 CALiBRAtion
In the spectrum measurement mode the calibration is
a baseline scan which is performed across the selected
wavelength range at the selected scan interval. Insert a
cuvette containing the blank solution into the sample
chamber and close the instrument lid. Press the key below
the
baseline scan icon to initiate the baseline scan. The
baseline icon will change to show baseline scan in
progress icon and a progress bar will be displayed.
To stop the baseline scan before completion press the key
below the
baseline scan in progress icon. Confirmation
will be needed to stop the baseline scan. Press the key
adjacent to the
tick icon to confirm stopping the baseline
scan and return to the expanded operating menu.
Press the key adjacent to the cross icon to continue the
baseline scan. Once the baseline scan has been completed
the
scan sample icon is displayed and a sample can be
measured.
If the wavelength range, or the scan interval, is changed
before a sample scan is performed a new baseline scan
must be performed across the new wavelength range, at
the new scan interval, before a sample can be measured.
7.4 SAMPLe MeASUReMent
It is not possible to measure a sample before a baseline
scan has been performed. Insert a cuvette containing the
sample to be measured in the sample chamber and close
the instrument lid. Press the key below the
scan sample
icon to start the spectrum scan of the sample.
The instrument will perform a scan across the wavelength
range and scan interval previously selected. The
scan
sample icon will change to show the spectrum scan is
in progress icon.
09:02
2.500
ABS
-0.500
350 550 450nm
0 100
09:02
2.500
ABS
-0.500
350 550 450nm
09:02
2.500
ABS
-0.500
350 550 450nm
09:02
2.500
ABS
-0.500
350 550nm 450nm
3 + . 0 2 0