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Instrument Benchtop Turbidity HD 25.2 0 pages
HD25.2 FNU NTU EBC ASBC
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ASBC FNU EBC NTU
Introduction
The HD25.2 is a digital turbidity meter for laboratory and mobile use, suitable for measure-
ments in drinking water, beverages, waste water and process liquids. The working principle
is based on the nephelometric (90° scattered light sensor) and ratiometric method. It is equipped with three light detectors and two LED light sources (white and infrared)
which are permanently kept under control in order to guarantee long-term stability. The
instrument performs measurements according to the standards EPA 180.1, ISO-NEPH
(ISO 7027), EBC and ASBC. It is also able to carry out measures of transmission factor
percentage of white and infrared light. The initial factory calibration is based on Forazin primary standard. Calibration before use
is not required. For routine calibration a set of stabilized secondary standard solutions is
available: STCAL (Turbidity standards for calibration):
• STCAL 1 equal to 0 NTU
• STCAL 2 equal to 1 NTU
• STCAL 3 equal to 10 NTU
• STCAL 4 equal to 100 NTU
• STCAL 5 equal to 1000 NTU
User Calibration is automatic on one, four or fi ve points, depending on the measuring
variable.
Stabilized power supply and advanced electronics garantee optimal performances over
time.
The HD25.2 is a datalogger that stores up to 999 samples. The data can be transferred from the instrument connected to a PC via the multi-standard
RS232C serial port and USB 2.0. The RS232C serial port can be used to transfer the acquired measurements to a 24 col-
umn printer. The Print function allows to print labels with progressive numeration and automatic incre-
mentation, with all data related to the sample being examined. The dedicated software DeltaLog11 allows instrument management and data processing
on PC. The use of the HD25.2 by more customers is facilitated by the “User Mangement” function,
which allows, according to the case, to enable or disable some advanced functions of the
instrument through password. The protection degree is IP66.
