4.2
Calibration
Careful, regular calibration is essential for
reliable, accurate measurement. The
calibration intervals depend on the particular
application and the required measuring
accuracy.
The calibration intervals must be individually
determined in practice for each application.
To begin with it is advisable to calibrate more
often, e.g. once a week to get to know the
operating behaviour.
Calibration steps:
• Depressurise the assembly (vent using the
drain plug or drain valve, if necessary).
• Remove electrode holder by taking off
protective cover and unscrewing union nut.
• Clean electrodes and assembly (see
Chapter 4.1). Automatic cleaning: clean
before removing electrode holder.
• Check electrodes for mechanical damage.
• Fill calibration vessel with buffer solution.
• Calibrate measuring system according to
instructions for measuring instrument.
• Rinse electrode with water.
• Refit electrode holder in assembly.
Caution:
•
Do not allow electrodes to stand in
distilled water.
•
Do not allow electrodes to stand
dry.
4 Maintenance
FlowFit P CPA 240
12
Hauser
