Hf-scientific MicroTPW Field Portable Turbidimeters Manuel d'utilisateur télécharger pdf (Page 11)

MicroTPI & MicroTPW (5/10)

Rev. 1.9

3.0 Normal Operation

This instrument allows for the measurement of the turbidity of a grab sample. The

turbidity is reported in Nephelometric Turbidity Units (NTU) and Formazin

Nephelometric Units (FNU). Readings above 1100 NTU are outside the range of this

instrument.

Note: Nephelometric turbidity units (NTU’s) are numerically equivalent to Formazin

nephelometric units (FNU’s) (See Glossary).

Below are some typical screens and a description of when you should see them.

When turning on the instrument or after a calibration, this screen indicates that the

instrument is ready to read:

The instrument will display moving dashes on the screen for 6-7 seconds prior to

displaying a value. This will occur prior to taking a reading & prior to indexing. No

keypad presses will operate during this time.

After taking a reading, a typical display:

If the sample that is being measured has a turbidity that is higher than that which the

instrument can measure, the instrument will indicate this as an over-range condition by

flashing 1100:

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 21 22

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Hf-scientific MicroTPW Field Portable Turbidimeters Manuel d'utilisateur Page 11