100-167 Rev. B
Release Date: 10/29/18
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Product Specifications and Usage Information
P4400
GENESYS 30 Spectrophotometer
FIGURE 4
4.
Ensure the dosimeter holder is empty, then zero the instrument by pressing the yellow “0.00” button.
5.
After the instrument is zeroed, insert a dosimeter to be measured and select the green diamond-shaped button. The
measurement will be captured on the screen.
See Figure 5 below. Measurement time for each dosimeter is less than
1 second.
FIGURE 5
6.
After the measurement is recorded, remove the dosimeter and insert the next sample to be measured. Repeat step 5
above for all dosimeters.
NOTE: Only 10 consecutive measurements may be taken. If more than 10 measurements are needed, you must save or
discard the data before proceeding. The recorded measurements may be output to an external USB drive in the
form of .CSV files.
Scanning Measurements:
Sometimes a series of measurements over a range of wavelengths is the objective, in particular for qualification and
performance verification activities, and this can be accomplished using the Scan feature of the GENESYS 30.
Follow the procedure below to determine the peak wavelength of an irradiated film dosimeter or reference standard
(modify the procedure as necessary for other similar types of measurements):
1.
On the home screen of the GENESYS 30 navigate to the scan icon.
2.
Set the Scan Range (X-axis limits) at 500 – 600 nm in the absorbance mode by navigating using the arrow keys and
typing in the values for the lower and upper limits.
3.
Zero the GENESYS 30 with the intended dosimeter holder installed with no sample using the yellow 0.00 button.
4.
When the zeroing process is complete insert a B3 dosimeter into the dosimeter holder.
5.
Press the green Play (measure) button on the instrument keypad.
6.
The resulting graph will display. Using the arrow keys move the vertical line.
7.
The resulting graph forms a peak, move the line until you reach the peak absorbance value. Record the wavelength
associated with this value; this is the peak absorbance wavelength.
