HF scientific DRT-100B Research Turbidimeters - Manual (Page 12)

Page 4 DRT-100B (5/00)
Use the following procedure to standardize:
1. Place the Reference Standard in the Optical Well, indexed as described above.
2. Place the front panel Range Switch in the 1 NTU range.
3. Set the Reference Adjust knob, in the left forward corner instrument, such that the display reads .02
NTU.
Bottom
The turbidimeter’s optical system measures the liquid sample through this section of the Reference Standard,
grab sample cuvette or Flow-Thru Vial. It is therefore important that this 3/4" wide band of the glass container be
kept clean and free of scratches or abrasion.
FIGURE 1