Pasport PS-2121 Manuel utilisateur

PS-2121

The PS-2121 Colorimeter measures the transmittance (%) of different colors of

light through a solution, and can be used to determine a solution’s concentration.

Colorimeter Quick Start

1. Connect a PASPORTTM interface to a USB port on your computer or to a USB hub.

(If using an Xplorer, connect the Xplorer cable to a USB port on your computer.)

2. Connect the sensor to the PASPORT interface (USB Link, PowerLink, Xplorer, etc.).

3. The software launches when it detects a PASPORT sensor. Select a choice from

the PASPORTAL window.

Specifications:

Range: 0 to 100% transmittance

Wavelengths: Red (660 nm), orange (610 nm),

green (565 nm), blue (468 nm)

Accuracy:

0.5% transmittance

Resolution: 0.1% transmittance

Default sample rate 1 sample/sec

Maximum sample rate:*5 samples/sec

Temp. Range:** 5

–

C (recommended)

012-08158C

Colorimeter

* The recommended sample rate is 1 Hz for color and Beer’s law studies.

If you plan to do reaction order studies, use a faster sample rate.

**The temperature range applies to both the temperature of the solution in

the cuvette and the ambient temperature. Using the Colorimeter above

or below the recommended range or with condensation may give false

readings.

Calibration

button

cuvette holder

cuvette

lid

Equipment Setup

Equipment equipment needed:

• PASPORT interface with USB-compatible computer or Xplorer (PS-2000)

• DataStudio®, DataStudio Lite, or EZscreen software

Colorimeter Usage Tips

Colorimeter Specifications

CARD 1A

CARD 1B

800-772-8700 • 916-786-3800 • techsupp@pasco.com • www.pasco.com

*To calculate the log or inverse of absorbance, create an equation using the

DataStudio Calculator. The linear fit and Calculator features are not available

in DataStudio Lite.

DataStudio/DS Lite Procedure

View transmittance or

absorbance results:

From the Data list, drag a colored Transmittance or

Absorbance icon to a Graph or other display.

Open the Experiment

Setup window:

On the main toolbar, click on the Setup button to

open the Experiment Setup window.

Set up the Colorimeter

to read absorbance:

In the upper right corner of the Experiment Setup

window, click on the Maximize button. Scroll to the

Colorimeter box and check the absorbance boxes.

View a linear fit*:Click on the Fit menu button. From the Fit menu,

select “Linear Fit.”

Note: Only the first data run of all four colors (red, blue, green,

orange) will correspond to the graph colors that DataStudio

displays. (This applies to either default measurements or the first

four chosen in the PASPORT Setup window).

Transmittance of Colors through a Red Solution

Activity Example (Continued): Sample Results

Viewing Results in DataStudio

CARD 2B

Activity: Transmittance and

Absorbance of Colors in Solution

Equipment Required: PS-2121 Colorimeter, DataStudio or DataStudio Lite,

PASPORT™interface connected to a USB-compatible computer, distilled water,

red (or other) food coloring, 2 cuvettes

1. Fill one cuvette with distilled water and screw the cap on securely.

2. Fill another cuvette with colored solution (i.e. 2 drops of red food coloring

and 6 ml of water). Screw on the cap, then gently rock the cuvette back

and forth to evenly mix the solution without creating bubbles.

3. Insert the cuvette containing distilled water into the cuvette holder and

tightly close the lid.

4. Plug the Colorimeter into the PASPORT interface, launch DataStudio,

and click the Start button to begin collecting data. The default graph

displays the transmittance readings for each of the four possible

wavelength settings. Click the Stop button to end data collection.

5. Open the Colorimeter lid, remove the first cuvette, and replace it with the

cuvette containing the colored solution. Repeat steps 3 and 4 to collect

data for the colored solution.

6. Examine the graph display from run #2 (the colored solution). Note

the transmittance readings at each wavelength setting. How do

they differ from transmittance readings for the distilled water?

7. To view absorbance data, click on the button to open the

PASPORT Setup window. Maximize the PASPORT Setup window

to view the Colorimeter options.

8. Uncheck each of the four transmittance boxes, and click to place an

“X” next to each of the four absorbance boxes. (Note the changed

“Data” list in the Summary bar to the left.) Close the Setup window.

9. To open a new Graph display, double click on the Graph icon in

the Data list. When the dialog box appears, select a data source to

display absorbance for a data run and wavelength. Click OK to

open Graph 2, which will display Absorbance vs. Time. (Note: If

desired, you can use a Digits display instead of a Graph.)

10. To compare absorbance values for the distilled water and colored

solution, drag the appropriate icons from the Data list to Graph 2.

Analyze which colors were absorbed or transmitted for each run

and explain your results.

800-772-8700 • 916-786-3800 • techsupp@pasco.com • www.pasco.com

®012-08158C

CARD 2A

Calibration Procedure

Sample Preparation

Calibration of the Colorimeter is not always required, but is recommended for

better accuracy. You can calibrate the colorimeter when it is connected to either

an Xplorer or a USB link. All calibration readings are stored in flash memory

inside the PS-2121. When you unplug the sensor and reconnect it, the sensor

retains the last calibration reading.

1. Fill the cuvette with at least 6 ml of sample. Screw the cap on securely.

2. Gently rock the cuvette back and forth to distribute the solute molecules

equally throughout the solution.

Do not shake the cuvette or allow air

bubbles to enter.

3. Handle the cuvette by the cap and wipe the outside glass lens clean with

a non-abrasive cleaning tissue.

Avoid touching the glass with your

fingers!

4. (Optional): Place one of the provided labels on the cap of the cuvette. (See

“Orienting the Cuvette” below.)

Before taking measurements, always do the following:

CAUTION: To avoid errors when calibrating, do not use the Colorimeter

around bright lights or with turbid solutions. Always close the lid tightly before

taking measurements. For accurate readings, fill the cuvette to the lid with

sample.

1. To calibrate for 100% transmittance, insert a cuvette filled with distilled

water into the cuvette holder and tightly close the lid.

2. Press the green Calibration button on the sensor. The light

illuminates to indicate calibration is in progress.

3. Wait for the light to turn off and then remove the sample.

4. To check your calibration, reinsert the cuvette, close the lid, and click

the Start button in DataStudio. All color readings should approximate

100% transmittance.

Experiment Suggestions

• Performing reaction rate, enzymatic, and bacterial growth studies

• Monitoring the concentration of substances in water or other solutions

012-08158C

Orienting the Cuvette (Optional)

To minimize reading variance due to natural differences or imperfections in the

glass of the cuvette, do the following for each cuvette you plan to use:

1. Insert the cuvette containing distilled water or other solution into the

cuvette holder.

2. Put a piece of black cloth over your hand and the cuvette (so that no

light seeps through). Click the Start button in DataStudio.

3. With your covered hand, rotate the cuvette while observing the reading

in DataStudio. At the highest transmittance reading, click the Stop

button. Do not rotate the cuvette any further.

4. With the cuvette still in the holder, place one of the provided arrow labels

on the cap, with the arrow pointing toward the screw on the holder. (For

subsequent measurements, always align the arrow with the screw on

the holder. Do not switch caps between cuvettes!)

Note: While in calibration mode, please do not start collecting data. The

PS-2121 Colorimeter cannot communicate during this time and an error

will occur.

A blinking red light on the Calibration button means either (a): The dark

count is too high; stray light is entering the cuvette holder or (b): The

sensor measurement is out of range. The light turns off when the reading

is within the normal range.

800-772-8700 • 916-786-3800 • techsupp@pasco.com • www.pasco.com

CARD 3A

CARD 3B

Using the Colorimeter with DataStudio

By default, when you plug a Colorimeter into a PASPORT interface and click

the Start button, DataStudio automatically displays the percent

transmittance readings for each of the four colors (red, green, blue, orange)

in a Graph display. Any time you need to change the Colorimeter’s settings

to read a different measurement, you must use the PASPORT Setup

window in DataStudio. To open the PASPORT Setup window, click the

button on the main toolbar. Then click to place an “X” next to the

desired measurement. To remove the setting, click on the “X” again.

Example: You want the Colorimeter to read absorbance instead of %

transmittance for all four colors. In the boxes next to the colors with the

“transmittance” unit, click to remove the “X.” Then click to place an “X” in

each of the boxes next to the colors with the “Absorbance” unit.

1. Plug the Colorimeter into the PASPORT interface. When the

PASPORTAL window opens, select “Launch EZ-SCREEN.”

2. To begin collecting data, click the Start/Stop button.

3. To end data collection, click the Start/Stop button.

4. To cycle through the different colors and measurement types, click

the Colorimeter icon in the bottom right corner of the screen.

5. To toggle between separate runs of data, click the Toggle

button.

Note: To simultaneously view all colors in one graph, you must use either

DataStudio or DataStudio Lite.

Note: Colorimeter options appear in the Setup window when you connect

a Colorimeter to a USB link. To view all Colorimeter measurement options,

use the Maximize button in the Setup window.

Using the Colorimeter with Xplorer

1. Turn on the Xplorer.

2. Plug the Colorimeter into the Xplorer. (Note: If you wish to perform

calibration, you must have Xplorer connected to your computer. Use

the procedure described on the reverse of this card.)

3. To collect data, click the Start button. The LED light flashes

when Xplorer is storing data. (To stop, click the Start button again.)

4. To cycle through the measurements (transmittance or absorbance) for

each color, click the Plus button (to more forward) or Minus button (to

move backward.)

5. To view your data in DataStudio, connect the Xplorer cable to the USB

port on your computer and to the USB port on the side of Xplorer.

6. At the DataStudio prompt, click Retrieve Now. DataStudio

automatically displays the % transmittance readings for the four

colors.

Note: To view absorbance readings in DataStudio, you must open the Setup

window and change the settings. See “Using the Colorimeter with DataStudio”

on this card.

Using the Colorimeter with the

PASPORT EZscreen

Use the down

arrow and the Plus

and Minus buttons

to change the

sample rate.

012-08158C

CARD 4A

CARD 4B

Table des matières

Autres manuels Pasport Instrument de mesure

Pasport

Pasport PS-2179 Manuel utilisateur

Manuels Instrument de mesure populaires d'autres marques

Suaoki

Suaoki D40 Manuel utilisateur

Elster

Elster BK-G1.6 Manuel utilisateur

Endress+Hauser

Endress+Hauser Deltabar FMD71 Manuel

Duratool

Duratool D03128 Manuel utilisateur

Vega

Vega VEGAPULS 65 Manuel utilisateur

Tonghui

Tonghui TH2618B Manuel utilisateur

Tenmars

Tenmars TM-801 Manuel utilisateur

MSR

MSR 145 Manuel utilisateur

TPS

TPS WP-82 Manuel utilisateur

ELMETRON

ELMETRON CP-511 Manuel utilisateur

PCB Piezotronics

PCB Piezotronics 003C30 Manuel utilisateur

Tenma

Tenma 72-10465 Manuel utilisateur

Endress+Hauser

Endress+Hauser Proline Promag 50 Caractéristiques techniques

Siemens

Siemens SITRANS F Coriolis FCT030 Manuel de la liste des pièces

KLINGER

KLINGER CMF V Series Manuel utilisateur

EXFO

EXFO FTB-2 Manuel d'exploitation et d'entretien

Keysight

Keysight M8290A Manuel utilisateur

ADTEK

ADTEK MW-5 Manuel utilisateur