Hanna Instruments HI 93414 User Manual
Page 25
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FREE AND TOTAL CHLORINE MEASUREMENT
To take colorimetric measurements follow next
steps:
• Turn the instrument on by pressing
ON/OFF.
Assure that the correct range is selected by
paying attention to the startup message or to
the measuring units.
• When dashes are displayed on the LCD, the
instrument is ready. The current time appears
on the secondary LCD, if selected in SETUP
menu, or “
F Cl” or “t Cl” if the time is not
displayed. The “
ZERO” tag will blink
suggesting that a zero measurement should be
done.
ZEROING THE INSTRUMENT
• Fill a clean, dry cuvette with 10 mL of sample,
up to the mark, taking care to handle the cuvette
by the top. Replace the cap.
• Wipe the cuvette thoroughly with a lint-free
cloth to remove any fingerprints, dirt or water
spots.
• Place the cuvette into the instrument. Align the
mark on the cuvettee with the sign on the
instrument top and close the lid.
Note: If you have a cuvette with orientation mark
place the cuvettee with the orientation mark
aligned with the sign on the instrument top.
• Press
ZERO/AVG
▼
. The dashes will blink
on the primary LCD. If the zeroing procedure
was successful, the display will show “
-0.0-”.