Owner manual

Turbidity Standards

Only use AMCO or formazin standards with the 2020. StablCalâ standards below 50

NTU should not be used to calibrate the 2020. The diluent used in StablCal

standards has a different refractive index than traditional formazin standards and will

affect the results. The concentration of the calibration standard should be similar to the

expected concentration of samples that will be tested. The following standards are

available from LaMotte Company:

1480 0 NTU Standard, 60 mL (EPA and ISO)

1484 1 NTU Standard, 60 mL (EPA)

1481 1 NTU Standard, 60 mL (ISO)

1485 10 NTU Standard, 60 mL (EPA)

1482 10 NTU Standard, 60 mL (ISO)

1486 100 NTU Standard, 60 mL (EPA)

1483 100 NTU Standard, 60 mL (ISO)

CALIBRATION PROCEDURE

1. Press *ION to turn the meter on.

1.3

2. Press *IOK to select Measure. Main Menu

* Measure

Data Logging

Options

16:02:19 01/04/05

3. Rinse a clean tube (0290) three

times with the blank.

Below 1 NTU – The meter should be

blanked with a 0 NTU Primary

Standard or prepared turbidity-free

(<0.1 NTU) water. For the most

accurate results, use the same tube

for the blank and the sample.

24 ANALYSIS & CALIBRATION