Hitec Luxembourg S.A. |
5, Rue de l’Église, L-1458 Luxembourg
www.hitec.lu | [email protected] | Tel.: (+352) 49 84 78 - 1 | Fax. (+352) 401303
File Name: HTCA_003-DADS-UserManual.docx
Document Type: End User Manual | Version date: 01/05/2010 | Last Printed: 15/02/2011
Page 6/81
Introduction
This manual is written in order to let operate know how to work with a DABS, the HITEC
Absorptometer Type H, but the most part of its content is based on the Hitec DADS
application. The DADS application was developed to operate the DADS terminal (the upper
box of the DABS) which was used as the data acquisition system connected to the
Brabender Absorptometers Type E and B.
Today the DADS terminal production as a single part is stopping and is produced only for
replacement or troubleshooting. But this document describes the application function for this
terminal.
Note:
Before you start working with the DABS tester (or DADS terminal), please read the
sections
Starting on First Installation,
Safety note for the HITEC type H Absorptometer (DABS)
The protection door must stay installed and has to be closed during a
measurement.
Application Overview
The
carbon black absorption test
is used in the rubber and carbon black production
industry. The absorption test determines the quantity of liquid a carbon black sample is able
to absorb. The HITEC DADS application provides an automatic tool to execute absorption
tests and record the data resulting.
The
principle
of an absorption test is the following. A certain amount of carbon black is
introduced into a defined mixing chamber. During the measurement the carbon black in the
chamber is mixed, and liquid is added to it. A mixture is created developing a certain
resistance to the mixing chamber rotor blades. This resistance can be defined by torque. The
DADS application records the torque vs. quantity of liquid added and terminates the test in
case certain conditions are fulfilled. See also the section How to do a test? for further
information on the absorption measurement.
As
liquid
n-Dibutyl Phthalate is used. This one will be called
DBP
in the current document.
Other liquids could be used in the future, depending on the specifications.
The DADS application measurements and operations are based on
ASTM standards.
Refer
to
for further information on this topic.
During the absorption test the raw curve torque vs. liquid quantity is recorded. After the test,
a significant part of the curve is determined and a
3rd order polynomial
is calculated, which
has proven to be for carbon black a very good fit to the raw curve. All the calculations and
test results are obtained with this polynomial.
