Hanna Instruments HI 96711 User Manual

Page 11

• Remove the cuvette.

• Place the specific CAL CHECK

Standard

Cuvette B into the cuvette holder, for:
Free Chlorine:

B, HI 96701-11

Total Chlorine:

B, HI 96711-11

• Ensure that the notch on the cap is

positioned securely into the groove.

• Press READ/ /TIMER and the lamp,

cuvette and detector icons will appear on
the display, depending on the
measurement phase.

• After measurement the instrument will

show for three seconds the CAL CHECK

Standard value.

Note:

If the display shows “STD HIGH”, the
standard value was too high. If the
display shows “STD LOW”, the
standard value was too low. Verify
that both CAL CHECK

Standard

Cuvettes, A and B are free from
fingerprints or dirt and that they are
inserted correctly.

• Then the date of the last calibration (e.g.:

”01.08.2009”

) appears on the display,

or “01.01.2009 if the factory calibration
was selected before. In both cases the
year number is blinking, ready for date
input.

CALIBRATION PROCEDURE

Note:

It is possible to interrupt calibration procedure at any time by pressing CAL CHECK or

ON/OFF

keys.

Warning

: Do not calibrate the instrument with standard solutions other than the HANNA CAL

CHECK

Standards, otherwise erroneous results will be obtained.

When calibrating, only the selected range is affected.

• Turn the meter on by pressing ON/OFF.

• When the beeper sounds briefly and the

LCD displays dashes, the meter is ready.

• To change the range, simply press

RANGE/GLP/ .

• Press and hold CAL CHECK

for three

seconds to

enter

calibration mode. The

display will show “CAL” during
calibration procedure. The blinking
“ZERO”

asks for instrument zeroing.

• Place the CAL CHECK

Standard Cuvette

A into the cuvette holder and ensure that
the notch on the cap is positioned securely
into the groove.

• Press ZERO/CFM and the lamp, cuvette

and detector icons will appear on the
display, depending on the measurement
phase.

• After a few seconds the display will show

“-0.0-”

. The meter is now zeroed and

ready for calibration. The blinking
“READ”

asks for reading calibration

standard.