Turner Designs AquaFluor, Руководство пользователя

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Aqua Fluor
®
U
ser’s Manual
7
2.4 Calibration Procedure
It is recommended for best accuracy, that you calibrate before performing your sample
analysis. The
Aqua Fluor
®
will save the calibration settings for each channel until a new
calibration is performed.
If the temperature of your samples or the
Aqua Fluor
®
changes significantly, the readings
may show a small shift and in this case, you should consider recalibrating. The solid
secondary standard is useful for checking the reading stability over time. Refer to section
2.5 instructions for using the solid secondary standard.
The
Aqua Fluor
®
is designed with “ambient light rejection”. The black sample compartment
cover does NOT need to be closed when calibrating or reading samples. This allows for the
use of cuvettes with different height dimensions, such as the 12x75 mm round glass tubes.
The orientation and cleanliness of the cuvettes can have an impact on the accuracy of your
results. Refer to Section 4, Sample Analysis Guidelines for information to help ensure the
best results for your analysis.
2.4.1 Assign a Calibration Standard Value
This defines the numeric value that you want the standard to read. For example, if
you calibrate with a primary standard that has a concentration of 50 µg/L, then you
will set the value to 50 and the resulting unit of measure will be in µg/L.
1. Press the <STD VAL> button.
2. Use the

and

arrow buttons to set the standard value. Pressing the arrow
button once quickly will make a small incremental change to the value. Holding
either arrow button will allow you to change the value using fast scrolling.
3. When finished, press the <ENT> or <ESC> button to accept the value and to
return to the Home screen.
2.4.2 Perform the Calibration
1. Press the <CAL> button.
2. Press <ENT> to start the calibration.
3. Insert your blank sample and press <ENT>. The
Aqua Fluor
®
will average the
reading for 10 seconds and set the blanking zero point.
4. Insert the standard sample and press <ENT>. The reading is averaged for 10
seconds and the Standard Calibration value is set.
5. Press <ENT> when the calibration is complete to accept the calibration. If
<ENT> is not pressed within 10 seconds, you will be asked if you want to abort
the calibration. Press the

or

arrow button to abort or accept the calibration
respectively.
If at anytime during steps 1-4 you want to stop the calibration, press <ESC>. This
will return you to the Home screen and will default the instrument to the previous
calibration.
For additional help with calibrations and step by step procedures please refer to the
Turner Designs video page .