Jenway 7315 Manual Italian - Manual (Page 33)

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If the start wavelength entered is the same as the end wavelength the end wavelength will automatically
be set to be one times the scan interval. For example, if the start wavelength is entered as 500nm but
the end wavelength is already set to 500nm and the scan interval is 2nm, the end wavelength will be
automatically adjusted to 502nm. If the end wavelength entered is the same as the start wavelength
the start wavelength will automatically be set to be one times the scan interval. For example, if the end
wavelength is entered as 500nm but the start wavelength is already set to 500nm and the scan interval
is 2nm, the start wavelength will be automatically adjusted to 498nm.
7.2.1.3 Setting the Scan interval
This function enables the interval between wavelengths measured in the spectrum scan to be set. The
scan interval can be altered to 1, 2 or 5nm by pressing the key below the
scan interval icon. Repeat
pressing of the key cycles the interval between 1, 2 or 5nm. The scan interval can only be selected if the
wavelength range is divisible by this number. For example a scan interval of 5nm cannot be selected for
a wavelength range of 400 to 503nm.
7.2.1.4 Y-Axis Scaling
This function enables the scale of the y-axis of the spectrum graph to be adjusted either manually or
automatically. The automatic scaling is represented by the
hand icon with a cross through it and the
manual scaling by the hand icon without the cross. To select manual or automatic scaling press the key
adjacent to the hand icon. Repeat pressing of the key cycles between manual and automatic scaling.
In automatic y-axis scaling the absorbance or %
transmittance values are cleared from the settings screen.
When the spectrum scan has been completed the y-axis
is automatically re-scaled.
In manual scaling the minimum and maximum
absorbance or % transmittance values can be set. To
change the absorbance or % transmittance values press
the key adjacent to the minimum y-axis value, this opens
a number entry screen.
Use the keys at the bottom of the screen to select the digit
to be changed and 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.
Automatic Scaling
Manual Scaling
3 - . 0 0 0
400nm 500nm
ABS
-0.500
2.500
400nm 500nm
ABS