Chapter
4
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pH, pH/ISE and pH/LogR Measurement Modules
Example pH Calibration Displays
Example 1: When
a pH calibration is started,
onscreen text prompts provide instructions for
how to perform each calibration step.
Example 2: A flashing
Stabilizing icon is shown
on the display as the
pH buffer reading
fluctuates and becomes stable.
Example 3: When the pH buffer reading is stable,
onscreen text prompts and function keys update
with the appropriate instructions and options.
Example 4: While
each pH buffer is being read,
the display shows the previous calibration points
with corresponding mV and temperature values.
Example 5: Once the pH calibration is complete,
the calibration summary is shown on the display.
Example 6: The calibration
summary can also
be viewed as a graph.
Example 7: The calibration edit function can be
used to edit calibration data and fix individual
points without performing a full recalibration.
Example 8: The calibration
summaries for the
ten most recent calibrations per parameter can
be viewed and printed in the calibration log.
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Chapter
4
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pH, pH/ISE and pH/LogR Measurement Modules
Relative mV Calibration
One standard can be used for relative mV calibration. Always use fresh standard for calibration.
Prepare the electrode according to the instructions in the electrode user manual. Connect the
electrode and any other electrodes to be used to the module inputs on the selected channel.
In
the measurement mode, press the
channel key
until the channel with the pH, pH/ISE or
pH/LogR module with electrode connected is shown. If needed, press the
mode key until
RmV
Measurement is shown as the measurement mode.
1.
Press the
f1 (Cal) key to start the calibration.
a.
If more than one channel is displayed in the measurement mode, press the
▲ or
▼
key to highlight the desired channel and press the
f3 (Select) key.
2.
Rinse the electrode and any other electrodes in use with distilled water, blot dry with a lint-
free tissue and place into the standard.
3.
When the electrode and standard are ready, press the
f3 (Start) key.
a.
If using a stirrer probe, the stirrer probe will start stirring when the
f3 (Start) key is
pressed and stop stirring when the reading stabilizes.
4.
Wait for the mV value on the meter to stabilize and perform one of the following actions:
a.
Press the
f2 (Accept) key to accept the displayed value.
or
b.
Press the
f3 (Edit) key and use the
f3 (Clear) key and numeric keypad to enter the
relative mV value. Press the
f2 (Accept) key to confirm the entered value.
5.
The meter will display the calibration summary including the mV offset. Press the
f3 (Cal Done) key to save the calibration and export the data to the calibration log. Press
the
measure (esc) key to proceed to the measurement mode.
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Orion V
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Meter User Manual
Thermo Scientific
Chapter
4
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pH, pH/ISE and pH/LogR Measurement Modules
ORP Calibration
V
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meters with pH, pH/ISE or pH/LogR modules offer a simple, automatic calibration
to the E
H
value (relative to the Standard Hydrogen Electrode, 420 mV at 25°C) in the ORP
mode when using the following items:
·
Thermo Scientific Orion ORP standard (Catalog Number 967901 or 967961)
·
Thermo Scientific Orion ORP electrode (Catalog Number 9678BNWP, 9778BNWP,
9180BNMD or 9179BNMD)
·
Thermo Scientific Orion 4 M KCl filling solution (Catalog Number 900011) or 4 M KCl gel
(in the 9179BNMD electrode)
Orion ORP standard is nonhazardous, stable and will not change over time, so it is an ideal
standard for any ORP measurement system. One ORP standard can be used for calibration.
Always use fresh ORP standard. Prepare the ORP electrode according to the
instructions in the
electrode user manual. Connect the ORP electrode and any other electrodes to be used to the
module inputs on the selected channel.
In the measurement mode, press the
channel key until the channel with the pH, pH/ISE or
pH/LogR module with ORP electrode connected is shown. If needed, press the
mode key until
ORP Measurement is shown as the measurement mode.
1.
Press the
f1 (Cal) key to start the calibration.
a.
If more than one channel is displayed in the measurement mode, press the
▲ or
▼
key to highlight the desired channel and press the
f3 (Select) key.
2.
Rinse the ORP electrode and any other electrodes in use with distilled water, blot dry with a
lint-free tissue and place into the standard.
3.
When the electrode and standard are ready, press the
f3 (Start) key.
a.
If using a stirrer probe, the stirrer probe will start stirring when the
f3 (Start) key is
pressed and stop stirring when the reading stabilizes.
4.
Wait for the mV value on the meter to stabilize, indicated by the flashing
stabilizing or solid
Ready icons. When the solid
Ready icon appears, press the
f2 (Accept) key to confirm the
ORP standard value.
5.
The meter will display the calibration summary including the mV offset. Press the
f3 (Cal Done) key to save the calibration and then press the
measure (esc) key to return to
measurement mode.
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Orion V
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Meter User Manual
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