NOTICE
Do read the instructions carefully before testing which can make you operate the machine
smoother and enhance the efficiency.
1. Operating environment must suitable for the working condition.
2. The measuring cell must be clean, dry and dust-free, the shading cover should be
closed when not using it.
3. For wet weather, delay the uptime.
4. The tested solution should be poured carefully into the bottle, avoiding to make the
bubble which will affect the test accuracy.
5. Recalibrate when the sample bottle is replaced or after maintenance.
6. Nonprofessionals are not supported to repair the instrument.
7. After filling the test solution into the sample bottle, conduct test immediately,
otherwise, the temperature fluctuation and particle deposition will impact the test
result.
8. The sample bottle must be cleaned very well and do not leave any scratch mark. After
wash it by laboratory detergent, flush it by distilled water repeatedly. Dry it by dust-
free dryer. After using for a long time, soak the bottle into diluted hydrochloric acid
for two hours, then flush it by distilled water repeatedly. Do not touch the main part
of the bottle, any fingerprint will impact the test result.
9. Preparing the Formazine turbidity standard solution correctly is very important to
get correct test result. Pay attention on every steps when prepare the standard solution,
swing the original solution evenly, transfer the solution correctly. Using high capacity
measuring bottle to prepare low value Formazine turbidity standard solution can reduce
the error.
10. Using suitable standard solution for calibration, before do calibration, do swing
the standard solution evenly to make sure the calibration value is correct. To get more
precise test result, repeat the calibration process for the same standard solution.
