Hanna Instruments c 125 User Manual
8
The instrument is supplied complete with batteries. Before starting operations, install
the batteries while paying attention to their polarity (see also “Battery Replacement”
section). To maximize the battery life the meter automatically switches off after 5
minutes of non-use. For reactivating it, simply press the ON/OFF key.
the batteries while paying attention to their polarity (see also “Battery Replacement”
section). To maximize the battery life the meter automatically switches off after 5
minutes of non-use. For reactivating it, simply press the ON/OFF key.
TAKING MEASUREMENTS
• Turn the meter ON by pressing the ON/OFF key.
• Turn the meter ON by pressing the ON/OFF key.
• At start-up the meter will show the full display for
a few seconds, then changes to the measurement
mode.
mode.
• When the LCD displays “----” the meter is ready
to measure.
• Fill a clean cuvette up to 0.5 cm (one quarter inch)
from its rim with the thoroughly agitated sample.
• Allow sufficient time for bubbles to escape before securing the cap.
Note: Do not over-tighten the cap.
• Wipe the cuvette thoroughly with a lint-free tissue
(HI731318) before inserting into the measure-
ment cell.
The cuvette must be completely free of fingerprints
and other oil or dirt, particularly in the area where
the light goes through (approximately the bot-
tom 2 cm/1 inch of the cuvette).
ment cell.
The cuvette must be completely free of fingerprints
and other oil or dirt, particularly in the area where
the light goes through (approximately the bot-
tom 2 cm/1 inch of the cuvette).
• Place the cuvette into the cell and check that the
notch on the cap is positioned securely into the
groove.
groove.
• The mark on the cuvette cap should point towards
the LCD.
OPERATIONAL GUIDE