Hanna Instruments HI 93414 - Manual (Page 29)

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TWO-POINT CALIBRATION
• Turn the instrument ON by pressing ON/OFF.
If you are not in turbidity range, first select the
range. If you are in turbidity range, 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
“
turb”, if the time is not displayed.
• Enter calibration mode by pressing CAL/
CHECK for 3 seconds. The display shows “CAL
P.1”on the secondary LCD and no suggested
value and “
READ” tag will blink.
• If the prepared formazin is used, edit the
displayed value by pressing ▲ or ▼ keys
until the display shows the correct value.
• Place the <0.1 NTU standard cuvette (or the
prepared one) into the holder and ensure that
the cuvette mark is aligned with the sign on
the instrument top.
Note: Alternatively, press CFM to skip the
first calibration point.
• Close the lid and press READ/TIMER . The
display will show blinking dashes and the icons
for cuvette, detectors and lamp will appear
during measurement.
• At the end of the measurement, the second
calibration point (15 NTU) is displayed on the
primary LCD and “
CAL P.2” on the secondary
LCD, and “ READ” tag will blink.
• Remove the first standard cuvette.
• Place the 15 NTU standard cuvette (or the
second prepared standard) into the holder, with
the cuvette mark aligned with the sign on the
instrument top.