MASIKT Measurement Analysis Service (Micro Balance Environment)
used for the financial and technical risk reduction in weighing projects chambers and/or rooms, (USD 100,000 – 500,000 project volume) by early analyzing the unpredictable but measurable fatal local vibrational and other perturbations in the automotive, chemical and other industrial R&D and production
The sensitive heart of any project is the ultra micro balance
(accuracy about 1 µg, left inside the chamber).
The MAS contains the complete measurement equipment for analyzing fatal and other failure contributions in order to comply with specifications and regulations ( e.g. US EPA, EU Stage V, for particulate matter filter weighing).
The picture shows
· Dr.sc.nat.ETH Ernst Joerin, Winterthur/Zurich, with the full measurement equipment for
· the analysis of dangerous vibrational perturbations (VWE), red sensors on the floor
· the analysis of all critical systems specs to be re-checked or certified (CCM),
e.g. temperature, humidity, air flow, cleanliness, electro-static discharge,
with special balance accuracy/perturbation analysis (Mettler Toledo UMX5)
· for harsh testing and production environment
Joint Global Measurement Experience
First Step : The VWE Analysis
(VWE = Vibrational Weighing Environment)
The main clients` interest
is precision weighing at the top accuracy level of about 1 micro gram ( 1µg ). This is usually done with either Mettler Toledo or Sartorius “Ultra Micro Balances”, which typically have a read-out accuracy of 0.1 µg, a reference repeatability of 0.25 µg and a sample weighing accuracy of about 0.5 µg – under nearly ideal conditions. “Ideal” means practically no perturbations from all kinds of failure contributions such as vibrations, temperature and humidity influences, pressure changes, electrostatic, draft, drift and other factors which affect a specific sample weighing operation.
For this purpose
the client usually defines a “weighing chamber” or “weighing room project”. The environmentally controlled climate inside the chamber or room should create the “best real conditions” around the micro balance, at least according to regulatory or other experimental conditions required to make reliable and accurate weighings. The weighing operation should be optimally placed in a total process. In the Automotive Industry with Diesel engine emission test requirements the chamber or room is usually a sub-project of a total “Automotive Test System”, as supplied e.g. by AVL or HORIBA.
The client`s first need is
before making any too detailed and expensive concepts
(e.g. to have an excellent micro balance and room, but no accuracy finally)
The vibrational perturbation problem
Although most senior production engineers and scientists do have quite a good experience and feeling for such suitable sites of a micro balance, the facts and numbers related to the actually occurring vibrational perturbations as a function of a 24 hours typical working day are not easy to get.
Furthermore, a specific micro balance does not feel a certain mechanical perturbation always in the same manner. E.g. the x-y horizontal perturbations affect the weighing result generally much worse than the z-vertical perturbations. The reliable experimental check of both these factors require quite expensive measurement and analysis tools as well as experience and time.
The IKT Measurement Service 1 : VWE Analysis with direct plus indirect perturbation check
IKT Expert Partners :
Mettler Toledo (Greifensee, CH) with the UMX5 ultra micro balance support, Dr.U. Joerin Geo-Technical Analysis (Zurich, CH) and Dr. A. Ziegler Consultants (Zurich, CH) with the direct vibration measurement interpretation (SYSCOM MS2003 sensor system) and geo-technical construction practical experience.
The picture shows :· the white Mettler Toledo UMX5 under the air draft (lamp) shield on a massive granite table inside the chamber, with the red direct vibration sensors on the floor in front of the chamber ( for the VWE) · the Schiltknecht Airflow ThermoAir3 sensor close above the MT UMX5 cell, the black CIMET clean air tube sensor inside back, and the silver control box in front, the yellow tube cap right to the draft shield for the Novasina pressure gage, the polonium device and other particulate matter equipment (for the CCM)
Second Step : The CCM Analysis
(CCM = Chamber Characteristics Measurement)
The client`s second need is :
The “complete service” problem
Although there are many well established special components suppliers (including calibration) there
are only few measurement service suppliers with the complete set of test equipment , which do have also a system manufacture experience and can interpret minor deviations in relation to the relevant
technical source for that (e.g. in the air conditioning system ). This is including the VWE competence. Most of the clients do not have the complete measurement set for checking all the parameters permanently.
The IKT Measurement Service 2 : CCM Analysis with Complete System Performance Check
IKT Expert Partners : (in addition to the VWE Analysis)
CAS AG Clean Air Services (CH), Vaisala (SF;D), Schiltknecht AG (CH), Novasina AG (CH), ZHW Zurich University of Applied Science (CH) among other air conditioning partners from EU/USA.
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