HACH LANGE LCK 303, Application Instruction

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Section 4 Operation
4.1 Analyse Ammonium-Nitrogen/Ammonium with
HACH-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 Ammonium or Ammonium-Nitrogen follow the working procedure
enclosed in the according Cuvette Test LCK 303, LCK 304 or LCK 305.
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 19 ) ensure that your measurement system is
functioning properly and is being correctly operated.
4.3 Evaluate HACH-LANGE Ammonium-Nitrogen/
Ammonium Cuvette Tests
Note: Make sure that the instrument is programmed with the corresponding calibration data,
see
3.4 Check entered data on page 14 .
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" (LCK 303/305) or "0.000“ (LCK 304) 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.