®
Water Quality Colorimeter PS-2179
3
For Best Results
• Place the cap fully over the ampoule. A blinking red light on
the calibration button indicates that the colorimeter is not
ready to make a valid measurement: either stray light is
entering the colorimeter or the measurement is out of range.
Ensure that the cap is properly in place to make the light stop
blinking.
• Keep the colorimeter horizontal.
• The ambient temperature and the temperature of the test
solution should be about equal and between 5° C and 40° C.
A cold ampoule may develop condensation, which would
affect the reading.
• Ensure that the outside of the ampoule is clean and dry.
• Do not test turbid water samples.
• Shield the colorimeter from direct sunlight.
Calibration
Calibration is not required but is recommended for better accu-
racy. Calibration information is stored in the colorimeter; when
you unplug the sensor and reconnect it, the sensor retains the last
calibration.
To calibrate the colorimeter you will need a calibration ampoule,
which is included in each ezSample Snap Vial kit.
1. Handling the calibration ampoule by the tip, wipe the glass
clean using a non-abrasive cleaning tissue. Avoid touching
the glass after it is clean.
2. Align the mark on the calibration ampoule as illustrated on
page 2 and insert the ampoule into the colorimeter
3. Place the cap over the ampoule.
4. Press the green button on the sensor. The button illuminates
(in green) to indicate calibration is in progress.
5. Wait for the light to turn off.
6. Remove the calibration ampoule.
If the red light on the button blinks, ensure that the cap is properly in place
and repeat the calibration procedure.
The interface cannot collect data from the colorimeter during calibration.
Wait until the green light turns off before recording or monitoring data.
After calibration, the colorimeter should register the concentration of the
calibration ampoule as close to zero (within the specified accuracy of the
test kit).
Specifications
Each type of ezSample test kit has its own accuracy and range
specifications. For that information, refer to the instruction sheet
included with the kit.
These specifications apply to the colorimeter itself, independent
of the reagent used.
Technical Support
For assistance with any PASCO product, contact PASCO at:
Limited Warranty For a description of the product warranty, see the
PASCO catalog.
Copyright The PASCO scientific 012-09873B
Water Quality Colorimeter
Instruction Sheet
is copyrighted with all rights reserved. Permission is
granted to non-profit educational institutions for reproduction of any part of
this manual, providing the reproductions are used only in their laboratories
and classrooms, and are not sold for profit. Reproduction under any other
circumstances, without the written consent of PASCO scientific, is prohib-
ited.
Trademarks PASCO, PASCO scientific, DataStudio, ezSample,
PASPORT, and Xplorer GLX are trademarks or registered trademarks of
PASCO scientific, in the United States and/or in other countries. All other
brands, products, or service names are or may be trademarks or service
marks of, and are used to identify, products or services of, their respective
owners. For more information visit www.pasco.com/legal.
Range 0 to 100% transmittance
Wavelengths 660 nm (red), 610 nm (orange), 565 nm
(green), 468 nm (blue)
Accuracy ±0.5% transmittance
Resolution 0.1% transmittance
Default sample rate 1 sample/s
Maximum sample rate 5 samples/s
Temperature range 5° C to 40° C
Address: PASCO scientific
10101 Foothills Blvd.
Roseville, CA 95747-7100
Phone: 916-786-3800 (worldwide)
800-772-8700 (U.S.)
Fax: (916) 786-7565
Web: www.pasco.com
Email: support@pasco.com
