HF scientific MicroTPI Field Portable Turbidimeter (Old) User Manual

Page 10

Turn on the instrument by pressing the ON/OFF button continuously for 1 second. Allow
75-second warm-up period while preparing for the turbidity measurement as described in
the following steps:
1. Sample approximately 100 ml of your process, as you would normally do for

turbidity measurement.

2. Obtain a clean and dry sample cuvette.
3. Rinse the cuvette with approximately 10 ml of the sample water (2/3 of cuvette

volume), capping the cuvette with the black light shield (cuvette top) and inverting
several times. Discard the used sample and repeat the rinsing procedure two more
times.

4. Completely fill the rinsed cuvette (from step 3) with the remaining portion

(approximately 15 ml) of the grab sample and then cap the cuvette with the supplied
cap. Ensure that the outside of the cuvette is dry, clean and free from smudges

5. Place the cuvette into the instrument and press it down until it snaps fully into the

sample well. Index the cuvette by pressing and holding down the

↵

button while

rotating the cuvette to identify the lowest reading (the displayed turbidity is

continuously updated on the display). Once the cuvette is indexed, release the

↵

button to display the measured turbidity (see Glossary for more information on
indexing a cuvette).

6. Repeat steps 1 through 5 for all of your samples.

Warning: NEVER pour liquid directly into the sample well of the instrument always use a

cuvette. The instrument will only accurately measure the turbidity of a sample
when cuvettes sealed with the black cap are used. The black cap serves as both
seal and a light shield.

Note: The instrument will turn off after approximately 5 minutes if no buttons are pressed.

Any typical glass cleaner can be used along with a lint free cloth, or tissue (Kimwipes®), to clean the outside of

the cuvette.

Ref. 22666 (12/04)

Rev. 1.4