Turner AquaFlash, Руководство пользователя

Страница: 18 / 18

Aqua Flash U
ser’s Manual
18
Appendix C: Calibrating the Aqua Flash
The
Aqua Flash can be user calibrated. This action will overwrite the factory calibration which
can only be restored using Aqua Flash Calibration Solution P/N 8600-225 purchased from
Turner Designs.
NOTE: Do not overwrite the factory calibration unless you are sure you have the proper
standards for calibrating the AquaFlash.
Calibration Procedure
The materials required for calibrating the
Aqua Flash are:
- Two glass cuvettes
- Standard that has a known chlorophyll concentration value; this can either be live
algae or a secondary standard, such as a dye solution.
- Deionized water
- Kim wipes
- Aqua Flash instrument
1. Turn the Aqua Flash on and wait until the warm up has completed.
2. Press the CAL button.
3. Press the ENTER button.
4. Fill a cuvette ¾ full with deionized water.
5. Insert the cuvette into the
Aqua Flash and press ENTER.
6. When measurement has completed, remove the cuvette from the instrument.
7. Fill a second cuvette ¾ full with the standard solution.
8. Insert the cuvette into the
Aqua Flash and press ENTER.
9. When measurement has completed, remove the cuvette from the instrument.
10. Press the CAL VAL button and adjust using the

arrow keys to set the value
displayed to match the standard solution
’s known chlorophyll (
µ
g/L) concentration.
-
If the message “Standard<Blank Recalibrate<ENT>” is displayed, it means the standard
solution used didn’t generate a response higher than the blank. Either the standard being
used isn’t appropriate for this application or a standard with a higher concentration is
required to proceed with calibration.
-
If the message “RE-CAL USING HIGHER CONC.” is displayed, it means the standard
solution’s response was slightly higher than the blank’s response but not high enough and
a standard with a higher concentration is required to proceed with calibration.
-
If the message “RE-CAL USING LOWER CONC.” is displayed, it means the standard
solution’s response was too high and a standard with a lower concentration is required to
proceed with calibration. You can either dilute the standard by half and re-calibrate or
obtain a new standard.