Industrial Test Systems Spa eXact EZ, Quick Start Manual

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10
ABOUT
ACCURACY & CALIBRATION
All tests have been calibrated at 100°F/38°C using certi fi ed reference
standards and standard analytical spectrophotometric methods. The
algorithms in the software re
fl ect the best correlation of the Spa eXact ®
EZ system against the AWWA, US EPA , DIN, and ISO reference test
methods for chlorine. Studies show that the Spa eXact
® EZ System
repeatedly agrees with an EPA Compliant reference method greater
than 99%. The Spa eXact
® EZ meter Advanced Photometric System has
been factory calibrated and you can expect the fi xed calibrations in the
meter to be valid for the life of the meter because of the quality, Long-
Life LED, the photo cell, and the software.
HEALTH DEPARTMENT COMPLIANCE
This DPD test system for Chlorine and Bromine are USEPA (DIN
Standard 38 408 G4, ISO 7393/2) accepted for testing requirements for
Free and Total Chlorine. The compliance requirement is a photometer
wavelength to measure between 490 and 530nm. The Spa eXact
® EZ
photometer uses a 525nm wavelength. The eXact ® Strip Micro CL (DPD-
1) uses the same reagents and proportions, and the resulting solution
pH is maintained between 6.2 and 6.5 as speci
fi ed by AWWA method
4500-Cl G. The USEPA does not “approve” commercial DPD delivery
systems. The eXact
® Strip Micro CL (DPD-1) for Free Chlorine, and the
eXact ® Strip Micro CL (DPD-3) for Combined Chlorine or the
eXact ® Strip Micro CL (DPD-4) for Total Chlorine meet your
reportable testing requirements because the eXact ® Strip
Micro CL delivers the same chemicals in identical proportions.
ABOUT THE BUILT-IN SAMPLE CELL
The built-in sample cell is made of transparent plastic; the sturdy cell design
will last for over 20,000 readings. Scratches on the cell will not compromise
the accuracy of your results because of the cell’s
fi xed position.
CLEANING THE SAMPLE CELL
Fill the sample cell with water and use the enclosed cleaning brush
to scrub the sample cell thoroughly. Rinse the cell. You can use dish
soap or distilled white vinegar for cleaning the cell if needed. NEVER
use solvents such as acetone.
COMPONENT
(FREE CHLORINE)
AWWA
4500-CL G
EXACT
®
DPD-1
Anhydrous DPD sulfate
1.5% 1.5%
Anhydrous Na
2
HPO
4
33.4% 33.4%
Anhydrous KH
2
PO
4
Na
2
64.0% 64.0%
EDTA 1.1% 1.1%
®