Hf-scientific DRT-15CE Portable Turbidimeter Manual do Utilizador descarregar pdf (Página 13)

DRT-15CE (5/10)Page 5

7.0 CALIBRATION PROCEDURES

7.1 Calibration Standards

7.1.1 ProCal Standard Set (optional) Catalog No. 39071

HFProCalStandardsarerecommendedandcertiedbyHFscientic.

Theyaretraceabletofreshlypreparedformazinprimarystandards.These

standards are very easy to use off the shelf anytime without preparation

makingthemanidealturbiditystandard.ACerticateofTraceabilityis

availableonrequesttotheHFscienticCustomerServiceDepartment.HF

ProCal Standards may be used for calibration of HF turbidimeters. Order

fromHFscientic,inc.

 NOTE: Donotfreezestandards.

Do not leave standards in the measuring well for extended

periods.

Do not shake standards.

Each ProCal Standard Kit contains:

-- 0.02 Calibration Standard

 -- CertiedProCalStandards10.00,100.0,1000NTU

Standards are contained in preselected cuvettes with light

shield caps.

-- A sturdy storage case

7.1.2 Standard Formazin Solutions

CalibrationofthisinstrumentisbasedonFormazin,amaterialwhichis

madebypolymerization.

CalibrationsamplesmaybeobtainedbydilutingFormazinstocksuspension

using“Turbidity-Free”water.Formazinstocksuspensioncanbeprepared

by the user (Reference Standard Methods For Examination of Water and

Wastewater)orakitcanbepurchasedfrom,HFscientic,inc.,

Catalog No. 50040.

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