Calibration; Calibration While The Probe Is Disassembled From Process; Calibration In The Process - Burkert 8221 Manuel D'utilisation

9.

cAlibrATion

There are two possibilities for calibration:
• calibration while the probe is disassembled from process ;
• calibration in the process.
9.1. calibration while the probe is
disassembled from process
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Rinse the probe thoroughly with deionized water.
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Use a beaker with an internal diameter of at least 60mm. (The
probe can be directly immersed into the Bürkert conductivity
standard calibration solutions).
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Use a solution of known conductivity.
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Check the temperature dependency.
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Immerse the probe in the calibration solution. Make sure that the
4 electrodes are immersed. The probe should be placed in the
center of the beaker.
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Leave the probe for at least 5 minutes for equilibration, before
initiating the calibration on the instrument.
For precise determination of the cell constant, it is recommended
that you use an assembly situation similar to the situation in the
process. The cell constant may vary according to the final mounting
position of the process.
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English
Type 8221
CALIBRATION
9.2.

calibration in the process

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Insert the probe in the process.
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Leave conductivity and temperature at least 15 min. for
equilibration.
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Take a process sample and perform an external measurement
with a reference conductivity system. The best approach is to
perform the measurement at a temperature equal to that of the
process. If that is not possible, you need to know the temper-
ature coefficient of your sample.
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Manually adjust the cell constant to read the same conductivity
value on the process instrument.
You may switch off the temperature compensation of
the process to prevent any errors. Refer to the operating
instructions of the device connected to the probe.