Hanna Instruments HI 931100 - Manual (Page 9)

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• To quit the calibration and save
the first point, press the CAL
key.
For better accuracy however, it is recommended
that a two-point calibration is performed.
TWO POINT CALIBRATION
• After the first point is confirmed,
immerse the FC 300B electrode
into the second solution:
HI 7085 at 0.3 g/L NaCl or
HI 7081 at 30 g/L NaCl.
Note: The electrode should be
immersed approximately
2.5 cm (1") into the so-
lution.
• Select the second point value
by pressing the BUF key. Make
sure that the selected value cor-
responds to the one being used
for the second calibration point.
• If the reading is not close to
the selected value, the "BUF"
symbol will blink.
Otherwise, if the reading is
close to the selected value, the
meter will recognize the stan-
dard solution. Only the "
"
symbol will blink, to indicate
that the reading is stabilizing.
• Once stabilized "CON" symbol
will appear on the display.
For best results, wait for a
couple of minutes and press
the CFM key.
• The two point calibration is now
completed and the meter re-
turns to the normal mode.
CAL
BUF
SINGLE POINT CALIBRATION (OFFSET)
• Dip the FC 300B sodium elec-
trode into the HI 7083 (3.00 g/L
NaCl) solution.
Note: Immerse the electrode
approx. 2.5 cm (1") into
the solution.
• Press the CAL key. The "CAL" and "BUF" indi-
cators will be displayed with the "BUF" and the
"
" symbols blinking.
• As soon as the standard solu-
tion is recognized, only the
"
" symbol will continue
blinking to indicate that the elec-
trode is stabilizing.
The value of the standard solu-
tion being used will be displayed
on the primary LCD.
• As soon as the electrode is sta-
bilized, "CON" symbol lights up.
For best results, wait for a couple
of minutes before pressing the
CFM key.
• HI 931100 will then display "30.0
gm".
CAL
gm
°C
NaCl
BUF CAL
CFM
CFM