22
INW - TempHion Instruction Manual
•
Molar NaBr (Bromide)
=
79.10 ppm
• 0.1 Molar NaCl (Chloride)
=
35.15 ppm
• 100 ppm (Chloride)
=
0.99 ppm
• 1000 ppm (Chloride)
=
9.90 ppm
• Stir to distribute standard evenly.
• Allow time for sensor to stabilize (15 - 20 minutes).
• In
the
Ref ppm
box for the fi rst point, enter the concentration you have chosen.
• Click
the
fi rst
Measure
button.
• When readings have stabilized to your satisfaction, click the
OK
button on the
pop-up box.
— Second Calibration Point—
• Add 10 cc of the
same
standard to the water. Depending on which solution you
are using, this will result in a concentration as shown below:
• 0.1 Molar NaBr (Bromide)
=
791.8 ppm
• 0.1 Molar NaCl (Chloride)
=
351.8 ppm
• 100 ppm (Chloride)
=
9.9 ppm
• 1000 ppm (Chloride)
=
99.0 ppm
• Stir to distribute standard evenly.
• Allow time for sensor to stabilize (15 - 20 minutes).
• In
the
Ref ppm
box for the second point, enter the concentration you have
chosen.
• Click the second
Measure
button.
• When readings have stabilized to your satisfaction, click the
OK
button on the
pop-up box.
— Applying Calibration Values—
• Observe
the
M
and
I
values in the right hand section of the calculator.
M
should
be between -50 and -60. For Chloride,
I
should be between 120 and 160.
• Click
the
Apply
button to apply calibration values.
• The reference values, the computed M and I, and the sample temperature will be
transferred to the calibration fi elds.
• Click
OK
to save the values to the sensor.
— Verifying Calibration Values—
• Using the Real Time Monitor, take a few readings while the sensor is still in the
standard. Be sure units are set to ppm. Readings should be very close to your
selected concentration.