HACH LANGE POCKET COLORIMETER II Phosphate LCK 348, Application Instruction, Page: 29 / 142

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Section 4 Operation
4.1 Analyse Phosphate-Phosphorus/Phosphate with
LANGE Cuvette Tests
DANGER
Handling chemical samples, standards and reagents can be dangerous. Users
of this product are advised to familiarize themselves with safety procedures
and the correct use of chemicals, and to carefully read all relevant material
safety data sheets.
To analyse Phosphate-Phosphorus/Phosphate (ortho or total) follow the working
procedure enclosed in the according Cuvette Test LCK 348, LCK 349 or LCK 350.
4.2 Quality assurance
The measurement results must be subjected to plausibility checks (dilute and/or
spike the sample).
Regular checks with corresponding standard solutions (see Section 5 Replacement
Parts and Accessories on page 31 ) ensure that your measurement system is
functioning properly and is being correctly operated.
4.3 Evaluate LANGE Phosphate-Phosphorus/
Phosphate Cuvette Tests
Note: Make sure that the instrument is programmed with the corresponding calibration data,
see
3.4 Check entered data on page 26 .
1. Fill DI water into an empty cuvette (LCW 919) up to the lower edge of the
barcode label.
2. Close the cuvette with the rubber stopper. This is the blank cuvette.
3. Thoroughly clean the outside of the cuvette.
4. Press POWER to switch on the instrument.
5. Make sure that the correct measuring range is selected!
Otherwise press MENU . "SEL" is displayed. A flashing arrow indicates the
current measuring range (1 or 2). Press GREEN key to select measuring range.
Press MENU to get back to the measuring mode.
6. Insert the blank cuvette into the cell holder equipped with the cuvette adapter
1 cm.
Note: Make sure that the cuvette adapter is positioned correctly.
7. Place the instrument cap with the HACH LANGE label over the cell holder to
cover the cuvette.
8. Press BLUE key. "0.00" is displayed.
9. Remove the instrument cap and insert the sample cuvette.
10. Place the instrument cap over the cell holder to cover the cuvette.
11. Press GREEN key.