Pyxis SP-380, Руководство пользователя

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6.2 Fluorescein Measurement
When powered on, the SP-380 will default to the PTSA measurement mode. Press FC ( ) to switch to
Fluorescein measurement mode. The water sample can be transferred to the sample cell using a pipette or
filled directly from a faucet, sample bottle, or sample valve.
*
NOTE
*
Special care should be taken when pouring the sample into the cell to avoid air
bubble entrainment, which can interfere with reading accuracy.
Before beginning a measurement, use the sample water to rinse the sample cell at least three times. Allow
5–10 seconds for the SP-380 to stabilize. The values will be displayed in white with a blue background if a
stable value is reached (Figure 3). For a sample containing 10.0 ppb Fluorescein, the measured Fluorescein
should be stabilized within the range of 9.8–10.2 ppb.
*
NOTE
*
The time required to reach a stable reading may be slightly longer if the water
sample temperature is significantly different than the environmental temperature at which
the SP-380 had been equilibrated (stored).
Figure 3.
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