Hach-Lange POLYMETRON 9240 Operator Manual - Manual (Page 83)

81
User Setup
7.2 Measurement
7.2.1 Targeted pH (non-cationic applications only)
7.2.2 Total gas/water ratio (cationic applications only)
7.2.3 Measure steps
If the analyzer has been set up for non-cationic applications,
the screen illustrated left is displayed.
Select the pH option and enter the target pH value for your
application. The measured pH value of the sample in the
measuring cell should be within ±0.2 pH of the target.
If the analyzer has been set up for cationic applications, the
screen illustrated left is displayed.
The example screen is for a 3-channel analyzer.
For each channel, enter the ratio of gas to water to minimize
the DIPA consumption. This is part of the installation
procedure and is explained in more detail in
Sample pH
conditioning check on page 53 .
Select the MEASURE STEPS option to set up the
measurement timings.
The measurement and rinse processes are explained in more
detail in
Measurement process on page 25 . Please ensure
you have read this before entering any of the measure
step parameters.
If the analyzer has been set up as a single channel analyzer
the screen illustrated left will be displayed.
The on line measurement time defines the measurement time
of the sample and how often the measurement values are
stored in memory. For a single channel configuration, it is
recommended to leave this time at the default value of 10
minutes.
If smart rinsing is required after a calibration, grab sample or
sensor reactivation, set this parameter to Yes and define the
maximum rinse time.