HACH LANGE POCKET COLORIMETER II Phosphate LCK 348, Application Instruction, Page: 27 / 142

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3. "RES" is displayed. Press BLUE key to scroll through the entries. Compare the
entries with the figures in the 3.2.2.1 Evaluation as Phosphate-Phosphorus
PO4-P on page 22 .
In case a value was not stored correctly, retrieve the factory calibration first. See 3.5.1
Retrieve the factory calibration on page 27 . After retrieving the factory calibration,
start the programming procedure again.
3.5 Overwrite stored calibration data
With the POCKET COLORIMETER II it is possible to overwrite stored calibration
data. Before overwriting calibration data it is recommended to retrieve the factory
calibration first. After retrieving the factory calibration, you can program new
calibration data.
In case of any mistake retrieve the factory calibration first.
3.5.1 Retrieve the factory calibration
1. Press MENU . "SEL" is displayed. A flashing arrow indicates the current
measuring range (1 or 2). Press GREEN key to toggle between measuring
ranges. Select measuring range retrieving the factory calibration.
1. Press MENU for about five seconds until "USER" followed by "CAL" is
displayed.
2. Press BLUE key to scroll to "dFL". Press GREEN key.