Hach DR/Check™ ABS Standards
General Information and Quality Control Instructions
General Information
The DR/Check™ ABS Standards are designed to verify instrument performance by measuring specific absorbance at crucial wavelengths.
Storage: Standards should be stored in their set box at room temperature and kept in an upright position.
Each standard requires proper alignment:
Hach instruments are precalibrated during manufacture. If instrument calibration changes during normal use, consult the instrument manual or contact Hach Technical Support directly at (970) 669-3050 or your Hach dealer.
Standard Visual Description: The visual depicts a Hach DR/Check™ Absorbance Standard, identified as "STD 1". It features designated areas for "Part No." and "Lot", along with an "Alignment Mark" clearly indicated by an arrow pointing to a specific reference point on the standard.
CAUTION: For sample determinations, do not use the blank to zero the instrument. Instead, use a water blank. (AR101A)
Instructions for Quality Control Use
To monitor instrument performance, follow these procedures:
| Wavelength (λ nm) | DR/800 Program # | DR/800 Model |
|---|---|---|
| 420 | 42 | 870, 890 |
| 520 | 52 | 820, 850, 870, 890 |
| 560 | 56 | 890 |
| 610 | 61 | 850, 870, 890 |
- Enter the program number as listed above for the DR/800 model, or the specific wavelength (λ nm) when using the Odyssey instrument.
- For optimal results, wipe tubes with a clean tissue and silicone oil before use.
- Insert the blank into the instrument, ensuring it is properly aligned. Press the "Zero" button.
- Place Standard No. 1 into the instrument, ensuring it is properly aligned. Press the "Read" button.
- Record the initial instrument reading in the provided blank table. This initial value should fall within the tolerance limits of the certified absorbance specified on the Certificate of Analysis.
- Repeat steps 4 and 5 for Standards No. 2 and No. 3.
- Execute all steps for every program number listed for the DR/800 and the corresponding wavelengths (λ nm) for your Odyssey instruments.
Note: To continuously monitor instrument performance, repeat these steps periodically and compare current readings to previously recorded values. (AR101A)
