Water I.D. Primelab 2.0, Manual

Page: 251 / 301

(112)
Turbidity-NTU
0.5 - 1000.0 NTU (Turb)
Internal Name: 112-Turbidity-NTU
10ml
Prime L ab
10ml
0.5
NTU
10ml
10
NTU
10ml
1000
NTU
Measurement procedure:
1 Mix the sample thoroughly.
2 Rinse the cuvette several times with the sample water.
3 Then fill 10 ml of the sample water in the cuvette.
4 Screw the lid back on the cuvette.
5 Insert the cuvette into the PrimeLab. Pay attention to the arrow on the front of the cuvette.
6 Tap TEST to perform the measurement.
7 The measured value is immediately displayed.
Notes:
If low values (< 20 NTU) are expected, we recommend to let the water sample (in the vial) rest
for at least 05:00 minutes before pressing TEST. As an alternative, you can also continue to
repeat measurement in steps of 01:00 minute. The lowest value displayed can be taken as a
result.
The test result can be converted into the following unit(s): FTU / FNU
Ensure that all parts are clean, dry and free of grease and the adapter must be placed firmly
until it stops.
If your PrimeLab was delivered with activated ID 112 (means you have NOT activated it
afterwards), the device is already calibrated. You only have to make a new calibration again if
you feel that results obtained are inaccurate. The calibration process is described under SET ->
calibration.
The following factors affect the accuracy of the measurement result : • a cell not thoroughly
cleaned / residue from previous measurements • scratches/water bubbles on the cell inner wall
• finger prints on the cell • environmental influences, such as different or extreme temperatures,
humidity or strong sunlight
The turbidity measurement method ID 112 uses, is based on the nephelometric principle, which
is described in DIN EN ISO 7027.
Make sure the PrimeLab 2.0 is calibrated correctly (see: "Settings - Calibration > Turbidity
(NTU)".)
Make sure that you use the cuvette specifically selected for this test, which has been prepared
according to chapter: "Settings - Calibration > Turbidity (NTU)".
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