PASCO PS-3214 Manuel utilisateur
Reference Guide
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Wireless Drop Counter
PS-3214
(a) (b)
(d)
(c)
(e)
(f)
Power: Rechargeable Battery
or USB Cable
Connection:
PS-3220 Introduction
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*See the PASCO catalog or the PASCO web site www.pasco.com for more information.
Introduction
The PASCO Wireless Drop Counter is a versatile
measuring device that can connect to a computer or
mobile device wirelessly through Bluetooth (BLE) or
physically through a USB port. It includes a rechargeable
battery and a Micro USB Cable. It measures the number
of drops of fluid that fall through the rectangular opening
(drop window) of the sensor and converts the drops into
a volume. It is typically used in conjunction with a pH
sensor and other equipment to perform a titration. Data
from the Wireless Drop Counter and other sensors are
recorded and displayed using software such as
SPARKvue or PASCO Capstone. SPARKvue allows the
sensor to work with a computer or a mobile device such
as a tablet or smart-phone when the sensor is
connected. PASCO Capstone will work on a PC or Mac.
The Wireless Drop Counter can be mounted on a
support rod. The counter is equipped with two integrated
probe holders. The included Micro Stir Bar fits onto the
end of a pH probe or probe of the same diameter.
The included syringe, syringe holder, stopcock valves,
and drop tip can be assembled into a drop dispenser that
can also be mounted on a support rod.
Equipment Included
(a) Micro Stir Bar (d) Stopcock Valves (2)
(b) Wireless Drop Counter (e) Drop Tip
(c) Syringe (60 mL) (f) Syringe Holder
Micro USB Cable (1 meter) - NOT SHOWN
Required Item* Part Number*
PASCO Data Collection Software see www.pasco.com
Recommended Items* Recommended Items*
pH Sensor Temperature Sensor
Support Rod and Table Clamp Magnetic Stir Plate
Beaker. 150 mL Graduated Cylinder, 10 mL
Consumables Consumables
0.1 M NaOH 0.005 M HCl
Hole for
Support Rod
Drop Indicator LED
Bluetooth LED
Device ID
ON/OFF Button
Battery LED
Drop Window
Hole for Temperature
Sensor
Hole for pH Sensor
PS-3220 Introduction
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Initial Step: Charge the Battery
• Connect the Cable: On the back of the
Wireless Drop Counter, pry open the rubber
seal that covers the Micro USB port. Use the
included Micro USB Cable to connect the
micro USB port on the back of the sensor to a
USB port or USB charger such as the
PASCO PS-2575 USB Single Port Charger.
Charging begins automatically. The charger
circuit inside the sensor turns itself off when
the unit is fully charged. The battery status LED will shine yellow as the battery is charging, and will shine green
when the battery is charged. The battery is partially charged at the factory. Initial charging time may be three
hours or longer depending on the power source and the condition of the battery.
Using the Sensor
The sensor is designed to work with PASCO data collection software to measure the number of drops that fall
through the drop window.
ON/OFF and Sleep Information
Before turning the sensor on, make sure that nothing is blocking the drop window. To turn the sensor on, press and
hold the ON button. When the battery status LED shines red for a moment, release the ON button. Then, the
Bluetooth status LED will blink. This indicates that the sensor is ready to be “paired” with a device using the data
collection software. NOTE: The sensor calibrates itself each time that it is turned on and therefore it is important
that the drop window is unblocked when the sensor is turned on.
To turn the sensor off, press and hold the ON button for a moment until the battery status LED shines red. Release
the ON button and the Bluetooth status LED stops blinking. The sensor puts itself to sleep after one hour of
inactivity if connected, and after several minutes if not connected.
Data Collection Software
See the PASCO web site at www.pasco.com/software for help in selecting the right PASCO software and to
check for the latest versions.
Software Help
•In Sparkvue, open the Main Menu and select “Help” for information about collecting, displaying, and analyzing
data.
PASCO Capstone SPARKvue
•Mac OS X •Mac OS X
•Windows •Windows
•iOS
•Android
•Chromebook
Device
ID
Pry open the cover.
Micro USB Port
USB Port Cover
open position
Wireless Drop Counter Introduction
4013-16026A
•In the window that opens is the address of the
web page for Help. Copy and paste the address
into a web browser program to open the
Sparkvue User’s Guide web page.
•SPARKvue User’s Guide web page”
.
•In PASCO Capstone, select PASCO Capstone Help from the Help menu,
or press F1.
LED Information
The “drop” LED operates as follows:
The “drop” LED blinks when a drop is detected passing through the
drop window.
If the lens in the drop window becomes obscured or dirty, the “drop”
LED shines continuously. Clean the lens with water or a glass cleaner
and a piece of lens paper or a lint-free cloth. Dry with a cotton swab.
The Bluetooth and the Battery Status LEDs operate as follows:
SPARKvue “Help” Window
drop LED
Bluetooth LED
Battery LED
PS-3220 Assembling the Titration Setup (See figure on next page)
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For a wireless Bluetooth connection:
For a micro USB cable connection to a USB port:
For a micro USB cable connection to a USB charger:
Assembling the Titration Setup (See figure on next page)
1. Put the Wireless Drop Counter on a support rod.
2. Attach a pH Probe to a Wireless pH Sensor. Put the pH probe into the larger of the two sensor ports on the
Wireless Drop Counter.
3. Mount the Micro Stir Bar to the end of the pH Probe.
4. Arrange the magnetic stirrer and a 150 mL beaker with 100 mL of 0.005 M HCl so that the end of the pH Probe
and the Micro Stir Bar are in the liquid in the beaker.
Assemble the Drop Dispenser
1. Remove the plunger from the syringe. Remove the protective white plastic caps from the stopcock valves.
2. Connect the two stopcocks together. Connect the stopcocks to the end of the syringe.
3. Connect the drop tip to the bottom of the stopcocks.
4. Attach the Drop Dispenser (syringe, two stopcocks, and drop tip) to the support rod above the Wireless Drop
Counter.
5. Align the Drop Dispenser so that the drop tip is over the rectangular window of the Drop Counter.
Bluetooth LED Status Battery LED Status
Red blink Ready to pair Red blink Low power
Green blink Connected
Bluetooth LED Status Battery LED Status
OFF -none Yellow ON Charging
OFF -none Green ON Charged
Bluetooth LED Status Battery LED Status
Red blink Ready to pair Yellow ON Charging
Green blink Connected Green ON Charged
Wireless Drop Counter Assembling the Titration Setup (See figure on next
6013-16026A
Syringe with 50 mL
of 0.1 M NaOH
Wireless pH Sensor
Direct Connect pH Probe
Wireless Drop
Counter
Drop Tip
Stopcock
Stopcock
Syringe Holder
Support
Rod
Micro Stir Bar
Magnetic Stirrer
150 mL Beaker with
100 mL of 0.005 M HCl
PS-3220 Assembling the Titration Setup (See figure on next page)
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Calibrating the Drop Counter
The Drop Dispenser has two stopcocks. The bottom stopcock is used to regulate flow rate and the top stopcock is
used to turn the flow on and off. The top stopcock should either be in the completely open (handle vertical) or
completely closed (handle horizontal) position.
The following two methods illustrate the calibration procedure.
Calibration (Generic Process using PASCO Capstone)
1. Attach the Drop Dispenser (syringe, two stopcocks and drop tip) to a support rod.
2. Fill the syringe with titrant. Put a beaker under the Drop Dispenser to catch the titrant.
3. Open both stopcock valves and adjust the valve on the bottom stopcock so that the drops fall at a rate of about
1 drop per second. Close the top valve after the rate is achieved. Discard the titrant in the beaker as directed by
the instructor.
4. Align the drop tip with the rectangular window in the Wireless Drop Counter. Put a graduated 10 mL cylinder
under the Drop Counter window so it can catch drops from the drop tip and give you a measure of the volume.
5. Start Capstone. “Pair” the Wireless Drop Counter wirelessly
to the computing device (e.g., computer). In Capstone,
open the “Hardware Setup” window and click the Drop
Counter with the Device ID that matches the number on
your sensor.
6. In Capstone, click the “Calibration” icon in the
“Tools” panel to open the Calibration window. In
Step 1, select the Volume measurement and
click “Next”. In Step 2 the “Wireless Drop
Counter Sensor” is picked by default. In Step 3,
the default choice for type of calibration is “One
Standard (1 point slope)”, Click “Next” to open
Step 4.
7. Open the top stopcock valve to let the titrant
begin dripping into the cylinder. NOTE:
Capstone will automatically record the number of
drops. (You do not need to click “Record”.)
8. After about 5 mL of titrant is collected in the
graduated cylinder, close the top
stopcock.Carefully measure the exact volume of
titrant in the graduated cylinder.
9. In Capstone, highlight the number in the
“Standard Value” text box in Step 4. Enter the
exact volume of titrant that you collected in the
graduated cylinder (5 mL in this example). Next,
click the button “Set Current Value to Standard
Value”.
Highlight the
number and
then enter
the exact
volume here.
Next, click
here.
Wireless Drop Counter Assembling the Titration Setup (See figure on next
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10. Step 5 opens automatically and it shows the “New
Calibration” in the lower part. NOTE: In this example,
Capstone counted 10 drops. Since the volume was 5.0
mL, the “New Calibration” shows “Slope” equal to
“0.500 mL/drops”.
11. In Capstone, click “Finish” to return to Step 1. Click the
“Calibration” icon in the Tools panel to close the
Calibration window.
Calibration (Generic Process using SPARKvue on a
Computer or Tablet)
1. Attach the Drop Dispenser (syringe, two stopcocks and
drop tip) to a support rod.
2. Fill the syringe with titrant. Put a beaker under the Drop Dispenser to catch the titrant.
3. Open both stopcock valves and adjust the valve on the bottom stopcock so that the drops fall at a rate of about
1 drop per second. Close the top valve after the rate is achieved. Discard the titrant as directed by your
instructor.
4. Align the drop tip with the rectangular window in the Wireless Drop Counter. Put a graduated 10 mL cylinder
under the Drop Counter window so it can catch drops from the drop tip and give you a measure of the volume.
5. Start SPARKvue.
•The “choose a path” window opens.
6. To “pair” the Wireless Drop Counter
wirelessly to the computing device
(e.g., computer or tablet), click or
touch “Sensor Data” in the “choose
a path” window.
•The “Sensor Data Configuration”
window opens.
7. In the “Sensor Data Configuration
window”, look in the “Connected
Devices” list. Touch or click to select
the correct address that matches the
Device ID XXX-XXX number found
on the Wireless Drop Counter.
•A message confirms that the sensor
is being connected.
Click or Touch
“Sensor Data”
Click or Touch
PS-3220 Assembling the Titration Setup (See figure on next page)
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•Next, in the “Sensor Data Configuration” window, the “Select Measurement for Templates” menu opens and
“Fluid Volume” is the measurement selected as default. The “Templates” window also opens with “Graph”,
“Table and Graph”, and “Digits” as the choices.
8. In the “Templates” window, touch or click the “Graph” template to open a “Graph” display.
•The Graph display shows “Fluid Volume (mL)” as the measurement on the vertical axis. The “Hardware Setup”
icon is in the lower right-hand corner.
Touch or Click
Hardware
Setup Icon
Wireless Drop Counter Assembling the Titration Setup (See figure on next
10 013-16026A
9. Touch or click the “Hardware Setup” icon to open the
“Configure Sensors and Measurements” menu.
•The menu shows the sensor name and the three
measurement choices. Note that each measurement has
a gear-shaped “Edit Data Properties” icon. Note that the
“Fluid Volume” measurement also has a “Calibrate
measurement” icon.
10. Click or touch the “Calibrate measurement” icon to open
the “Calibrate Sensor: Select Measurement” window.
11. In the “Calibrate Sensor: Select Measurement” window, touch or click “Continue” to open the “Calibrate
Sensor: Enter Values” window
•The “Calibrate Sensor Enter Value” window opens. Note that the window has a text area for “Standard Value:
10.0000........ ml” and a display area for “Sensor Value: 0.0000........ drops”
“Calibrate measurement” icon
“Edit Data Properties” icon
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