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7.1.2
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, 5 or 10nm by touching the value below scan interval
. Select the required scan
interval from the available options. Touch the
adjacent to the required interval to apply. 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.
7.1.3
Selecting Absorbance or % Transmittance
The default operating mode is absorbance. To change this between absorbance or % transmittance, touch
or
to select the required measurement mode. Repeat touches will cycle between
the two options.
7.2
Calibration
The calibration must be performed across the same wavelength range as the sample will be measured across. Insert
a cuvette containing the blank solution into the sample chamber and close the instrument lid. Touch the
icon
to initiate the baseline scan.
This sets the instrument to zero absorbance and 100% transmittance across the wavelength range and scan interval.
If the wavelength range or scan interval is changed, a new blank calibration will need to be performed.
7.3
Sample Measurement
It is not possible to measure a sample before a baseline scan has been performed. Once the calibration has been
performed the
icon becomes active and a sample can be measured. Remove the cuvette containing the
blank solution and place a cuvette containing the sample to be measured in the sample holder. Close the
instrument lid and touch the
icon.
Once the scan is complete the spectrum will be shown on the screen.
To perform another spectrum scan using the same method parameters touch
.
