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2019, Industrial Test Systems, Inc. Printed in USA
EXACT
®
STRIP MICRO CL INTERFERENCES
Interfering Substance
Interfering Levels and Treatments
Acidity
If sample has acidity above 150mg/L CaCO3
test may not develop full color . Neutralize to
pH 6.0 to 7.0 with 0.5N Sodium hydroxide.
Alkalinity
If sample has alkalinity above 200mg/L CaCO3
test may not develop full color . Neutralize to pH
6 .0 to 7 .0 with 0 .5N Sulfuric acid .
Bromine and Bromamines, Br
2
Color similar to free chlorine reaction at all levels .
Chlorine Dioxide, ClO
2
Color similar to free chlorine reaction at all levels .
Copper, Cu2+
Color development is reduced above 10 ppm (mg/L) .
Iodine, I
2
Color similar to free chlorine reaction at all levels .
Manganese, oxidized (Mn4+,
Mn7+) or Chromium, oxidized
(Cr6+)
See AWWA procedure 4500-CL F, 1(d) for
removal of interferences .
Monochloramines (NH2Cl)
(applies to DPD-1 only)
Monochloramine interferences are known
to occur in free chlorine DPD methods . This
interference is dependent on temperature and
monochloramine concentration .
Ozone, O
3
Color similar to free chlorine reaction at all levels .
Peroxides
Interference is possible .
pH
Typical pH samples of potable water with a pH
of 6 .0 to 9 .0 are OK . If outside this range adjust
to pH 6 .0 to 7 .0 using acid (0 .5N Sulfuric acid)
or base
(0.5N Sodium hydroxide).
BLUETOOTH
®
SMART TECHNOLOGY
Bluetooth
®
SMART is a low-power networking standard
which uses short radio waves to allow electronic devices
to communicate with each other wirelessly . The eXact iDip
®
comes standard with Bluetooth
®
4 .0 technology . It is a class
2 device with a wireless working distance of up to 30 feet
(10 meters) and a 2 .1 Mbps data transfer rate . This allows a
seamless transfer of data between a smart device and the
eXact iDip
®
photometer .
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 .
Our studies have shown that scratches on the cell will not
compromise the accuracy of your results because of the
cell’s fixed position.
MAKING CALLS
The eXact iDip
®
photometer is not intended for use while
talking on your smart phone . Talking during testing may
cause the app to shutdown .
ABOUT
Summary of Contents for 486101
Page 1: ...SMART GUIDE...
