Wireless Drop Counter
Assembling the Titration Setup (See figure on next
12
013-16026A
15.
Touch or click “New
Calibration” to see the Slope
and Offset values. In this
example, the Slope is
“2.0000 drops/mL” because
10 drops were counted and
the volume of the titrant you
entered is 5 mL.
16.
Click or touch “OK” to close
the “Calibrate Sensor”
window. Click or touch in the
Graph display to close the
“Configure sensors and
measurements” menu.
About the Calibration
Calibration information is stored
in the Wireless Drop Counter
Sensor and can be used by both
PASCO Capstone and
SPARKvue. The information can
be changed as needed. Note
that if you use a different liquid
as the titrant, or if you change
the drop rate or drop size by
adjusting the stopcock valves on
the Drop Dispenser, you will need to re-calibrate.
Acid-Base Titration (Calibration Method)
1.
Setup the equipment and consumables as shown.
2.
Start the data acquisition software.
3.
In the software, “pair” (connect) the Wireless Drop Counter and a Wireless pH Sensor
4.
Use the software to create a graph display of pH (vertical axis) vs. Fluid Volume (horizontal axis).
5.
Start the magnetic stirrer. Check that the micro stir bar is able to rotate.
6.
In the software, touch, or click “Start” or “Record” to begin recording data.
7.
Adjust the stopcock valves on the Drop Dispenser so
the titrant drops fall at about 1 drop per second.
8.
Observe the data on the pH versus Fluid Volume graph.
After the equivalence point is reached, continue
collecting data until the pH curve flattens.
9.
Close the stopcock valve and stop data recording.
•
In the software, touch or click the Start (or Record)
button to begin collecting data.
Touch or Click to see the results
The “Slope:” is 2.0000 because the sensor
counted 10 drops and you entered 5.0 mL
as the volume
Equivalence point
