Calibration procedure, View the calibration data – Hach-Lange SENSION+ MM378 User Manual
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Option
Description
DIN19266 Buffers
pH 1.679, 4.006, 6.865, 7.000, 9.180, 10.012 and
12.454
User Buffers
Selected when the technical or DIN19266 buffers
are not used. Refer to
on page 20 for pH values of
specific buffer sets at varying temperatures.
Calibration to a X value To adjust manually any scale value of the
measured pH or conductivity.
Data introduction
Manual probe constant introduction.
Theoretical calibration
pH: The probe calibration data is replaced at
25 °C (77 °F). EC: The probe calibration data is
replaced with C=1.000 cm
-1
DO:calibration is
based on theoretical values (no physical
calibration)
Molar Standards
147 µS/cm, 1413 µS/cm, 12.88 mS/cm and
111.8 mS/cm at 25 °C (77 °F)
Demal Standards
1049 µS/cm, 12.85 mS/cm and 111.31 mS/cm at
25 °C (77 °F)
NaCl Standards
1014.9 µS/cm 25 °C (77 °F)
DO Standards
1 point calibration: water saturated air
2 point calibration: water saturated air & zero
Calibration procedure
This procedure is for general use with liquid calibration solutions. Refer
to the documents that are included with each probe for additional
information.
Note: Solutions should be stirred during calibration. For more information about the
stirring settings, refer to
1. Pour the buffers or calibration solutions into the labeled calibration
beakers.
2. From the main menu use the or and and to select the
CALIBRATION parameter. Confirm.
3. If required select the Operator ID (1 to 10) and confirm.
4. Push to Start calibration.
5. Push to measure the first calibration solution.
The next calibration solution is shown.
6. Rinse the probe with deionized water and put the probe into the
second calibration beaker. Be sure that there are no air bubbles in
the membrane.
7. Push to measure the second calibration solution.
The next calibration solution is shown.
8. Rinse the probe with deionized water and put the probe into the third
calibration beaker. Be sure that there are no air bubbles in the
membrane.
9. Push to measure the third calibration solution.
When the calibration is good, the display briefly shows Calibration
OK and then returns to the main menu.
Note: When a printer is connected the print menu opens and the result can be
printed.
View the calibration data
Data from the most recent calibration can be shown.
1. From the main menu use the or to select DATA LOGGER.
Confirm.
2. Select Display data.
3. Select Calibration data and confirm with . The last calibration data
is shown.
• pH-the slope and offset values are shown alternating with the
deviation (in %) and calibration temperature.
• ORP-the measured mV value and calibration temperature are
shown.
• Conductivity-the cell constant and calibration temperature for each
standard are shown.
• DO-the current (in nA) and temperature are shown.
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