Compliance Verification - eXact Micro 20 Instruction Manual

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About
The eXact Micro 20 with Bluetooth
®
This type of reagent delivery method is designed to give the most precise accuracy reading for testing
various water quality parameters.
eXact Strip Micro has been designed to offer the user a more "Green" and cost–effective alternative
®
to testing. Instead of using a 10 mL water sample, eXact
which uses up to 60% less chemical per test. The accuracy of the meter is maintained by designing
the photo cell with a 20 mm path–length.

Compliance Verification

This DPD test system is accepted by most health departments because this test is USEPA (DIN Standard
38 408 G4, ISO 7393/2) accepted for testing requirements for Free and Total Chlorine. The eXact
Micro 20 meter uses a wavelength of 525 nm; and the compliance requirement is that the colorimeter
wavelength is between 490 nm to 530 nm. The eXact
and proportions, and the resulting solution pH is maintained between 6.2 and 6.5 as specified by AWWA
(American Water Works Association) method 4500–Cl G. It should be understood that the USEPA does
not "approve" commercial DPD delivery systems such as reagent powder pillows, tablets, dispensers, or
eXact Strip DPD delivery devices. The eXact
®
Strip Micro CL (DPD–3), the eXact
Micro Cd (DPD–1) for Chlorine Dioxide meet your reportable testing requirements because the eXact
Strip Micro strips deliver the same chemicals in identical proportions (see table below). Likewise, AWWA
proportions are followed as required for Total Chlorine measurements using Potassium Iodide. The eXact
Strip Micro Chromium is compliant because it uses the same wavelength and delivers the same chemicals
in the same proportions as AWWA method 3500–Cr B. This is also true for Phosphate (Ascorbic Acid
method, AWWA 4500–P E.) and Sulfide (Methylene Blue method, AWWA 4500–S
tests are based on the Nitroprusside/phenate method found in Standard Methods. Interferences are
controlled by EDTA and sodium potassium tartrate. Standard Methods requires an instrument reading in
the range of 630 to 660nm. The Micro 20 reads the reacted sample at 638nm.
Anhydrous DPD sulfate
Anhydrous Na
Anhydrous KH
EDTA
Strip Strip
Strip
SMART is designed to work with our line of eXact
®
For a complete list of eXact
Strip Micro CL (DPD–4) for Total Chlorine, and the eXact
®
Component
(Free Chlorine)
HPO
2 4
PO Na
2 4 2
Strip Micro uses a 4mL water sample,
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Strips Micro we offer, please see page 31.
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Strip Micro CL (DPD–1) uses the same reagents
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Strip Micro CL (DPD–1) for Free Chlorine, and the eXact
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AWWA
4500–CI G
1.5%
33.4%
64.0%
1.1%
Micro Strips.
®
®
Strip
®
D). Our Ammonia
–2
eXact
®
DPD–1
1.5%
33.4%
64.0%
1.1%
®
®
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