Hach-Lange POLYMETRON 9240 Operator Manual - Manual (Page 60)

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Installation
4.5 Analyzer stabilization
At this stage the analyzer has been completely installed, but needs to run for a period of time to
stabilize.
1. On the analyzer, press Start on the main menu to start the measurement process.
2. Leave the system to run for a couple of hours before starting any calibrations.
4.6 Analyzer setup
After the analyzer has stabilized, the system and user parameters must be set, followed by an
initial calibration.
1. SYSTEM SETUP - see System Setup on page 73 .
2. USER SETUP - see User Setup on page 79 .
3. CALIBRATION - see Calibration on page 93 and launch a two point calibration.
Note: The complete calibration cycle will last around 1 hour. However, the instrument cannot be calibrated
until at least one complete measurement cycle has been successfully performed. An attempt to calibrate the
instrument before this will result in a “Not authorized” message being displayed.