Ph Measurement - Fisher Scientific XL15 User Manual

pH Operation
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pH MEASUREMENTS
The measure screen provides readout of the current sample measurement. You can use
this meter when the Auto Read function is active or when it is inactive. When the auto
read function is active, the meter will lock onto a reading when the meter recognizes it
as stable. The meter will not deviate from this reading until the Measure button is touched.
If the Auto Read mode is inactive, then the meter will continuously monitor the pH of the
sample and the measure display screen will indicate any fluctuation in the sample pH.
Regardless of the status of the Auto Read mode, STABLE will flash as the meter recog-
nizes the measurement as stable.
Once the meter is standardized, you are ready to take pH measurements of your sample.
To Measure pH of a Sample with Auto Read ON
1. Immerse the rinsed electrode(s) in the sample and stir gently.
2. Touch Measure to begin measuring your sample. The meter will accept the reading
and display STABLE when the measurement meets the selected stability criteria.
OR
To Measure pH of a Sample with Auto Read OFF
1. Immerse the rinsed electrode(s) in the sample and stir gently.
2. Record the reading once the measurement has become stable. STABLE will appear
once the meter recognizes that the measurement is stable.
NOTES: You can access other functions of the meter with the remaining buttons on the
measure screen.
• Touching Print will send the data to the meter's memory if the sample ID# is activated
and to a printer or a computer if it is attached to the meter. The saved data can be
accessed through the View Storage Data screen in the pH Setup mode.
• Touching Setup will access the pH Setup screen.
• Touching Measure will initiate a new measurement of a sample with Auto Read ON.
• At anytime, you can touch Mode to access another mode of operation including: mV,
rel mV or the setup mode.