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Become familiar with the meter and the different tests by reading the instructions carefully.
The Free Chlorine, Combined Chlorine, and Total Chlorine reagents are compliant for meeting
USEPA (4500-Cl G); ISO 7393/2; and German DIN 38408 G4-2 requirements.
Observe the dip time (
as required for the test
) for accurate results.
7HVWLPPHGLDWHO\DIWHU¿OOLQJWKH
CELL
with water sample when testing for oxidizers.
Be sure the
CELL
LV¿OOHGWRFDSDFLW\P/
Rinse the
CELL
with clean water immediately after completing the test
(some indicators will stain
the CELL wall if allowed to remain in the CELL).
Just before testing, rinse the sample
CELL
with the sample water several times to get a
representative sample. (
Use deionized or distilled water for rinsing if you have a limited amount of
sample
).
Store the meter and all test materials out of direct sunlight and away from chemical storage areas.
Minimize exposure of meter and test reagents to heat above 32°C (90°F).
Dry the outside of the meter when testing is complete or before storage of the meter.
When running a DPD-1 Free Chlorine test
AFTER
a Total Chlorine DPD-3, a Total Chlorine DPD-4,
or a HR Free Chlorine test, rinsing is very important to remove residual KI, which may interfere.
Each strip is valid for
ONLY
one test. Discard strip after single use in regular refuse that is
inaccessible to children and pets.
Each bottle of strips contains, at minimum, the quantity of strips notated on the bottle. Due to the
VWULSVOLWWLQJSURFHVV\RXPD\¿QGRQHRUWZRH[WUDVWULSVWKDWDUHQRWLFHDEO\VPDOOHURUODUJHULQ
width than the normal strips in the bottle. These should be discarded. Using these strips may give
incorrect results.
The HHWT-11 Photometer is not compatible for use with DPD-1, DPD-3, and DPD-4 powder
pillows, tablets, or liquids available from other manufacturers. Accurate results can only be
guaranteed by using genuine Micro strips or reagents (
reorder information below
).
Our lab testing with the HHWT-11 meter has shown that zeroing and measuring of the sample
normally does not require any cell cover for accurate results, except in sunlight. To obtain optimal
accuracy when testing with the meter outdoors (sunlight), use the Mixing Cap/Cell Cover when
zeroing and reading the sample.
Remove batteries when meter is not used for more than a month (Warranty Requirement).
&(//FOHDQLQJLQVWUXFWLRQV)LOOFHOOZLWKFOHDQZDWHUDQGPRYHWKH&HOOFOHDQLQJEUXVKXSDQG
down and back-and-forth along the walls of the cell. Afterwards, rinse the cell and the meter is
ready for use again. Cleaning the cell regularly is especially recommended after you run a test that
is using turbidity or precipitation chemistry for analysis (contact technical support for details).
HHWT-11 Tips For Best Accuracy
About The Built-In Cell
The built-in
CELL
LVWUDQVSDUHQWSODVWLFDQGZKHQ¿OOHGWRWKHWRSFRQWDLQVPO7KHVWXUG\
CELL
design
will last for over 20,000 readings. Scratches on the
CELL
will not interfere or compromise the accuracy of
WKHUHDGLQJVEHFDXVHRILWV¿[HGSRVLWLRQ)RUEHVWDFFXUDF\ULQVHFHOOZLWKFOHDQZDWHULPPHGLDWHO\DIWHU
a test is completed. Do not use solvents, such as acetone, to clean the cell. When the
CELL
becomes
stained or cloudy from repeated testing, or when the meter does not blank when you press the
ZERO/ON
button, the cell needs to be cleaned.
