Test Method for Determining the Ionic Resistivity (ER) of Alkaline Battery Separator Using a Carbon Electrode in an Electrolyte Bath Measuring System

10.1520/d7148 ◽  
2008 ◽  
Author(s):  
Keyword(s):  
Test Method ◽  
Measuring System ◽  
Carbon Electrode ◽  
Alkaline Battery ◽  
Battery Separator ◽  
Ionic Resistivity

scholarly journals Introduction of the compensatory method of gas sample control in universal systems of ecological diagnostics of diesel engines – microtunnels

2017 ◽  
Keyword(s):  
Flow Rate ◽  
Diesel Engines ◽  
Experimental Studies ◽  
Indirect Measurement ◽  
Differential Method ◽  
Test Method ◽  
Measuring System ◽  
Dilution Factor ◽  
Diagnostic Systems ◽  
Accuracy Of Measurements

Purpose. The development, implementation and confirmation of the practical suitability of the compensatory method for monitoring a gas sample in microtunnels, which is significantly less expensive than the known analogs, in particular the differential method used in the AVL SPC 472 measuring system. Methods. Analysis and synthesis of information on methods for controlling gas samples, regression analysis in the construction of calibration dependences, experimental studies of the method under study, a calculated experiment in evaluating the accuracy of determining the dilution factor of a sample. Results. Measures have been developed to introduce an inexpensive compensatory method for controlling gas samples in universal systems for the ecological diagnosis of diesel engines – microtunnels: the method of calibrating the flowmeters of this method - standard narrowing devices, the method of indirect measurement of the mass flow rate of the sample in a microtunnel, the algorithm for regulating the flow rate of the sampled sample. Conclusions. Theoretically justified, the expediency of using the compensation method of sample control, which is 5 ... 8 times cheaper than the known analogue - the differential method used in the microtunnel AVL SPC 472. It has been experimentally confirmed that, when implementing the compensation test method, inexpensive flow meters - standard tapering devices with a precision class of 1.5 provide the required accuracy of measurements of the dilution factor of exhaust gases by air with an error not exceeding the permissible value of ± 4% and can be used in universal ecological diagnostic systems diesels - microtonules.

Simplified isoperibol calorimetry for thermal testing of dielectric and conducting materials

2011 ◽  
Vol 60 (1) ◽  
pp. 95-104
Author(s):  
Leszek Moroń ◽  
Paweł Żyłka
Keyword(s):  
Specific Heat ◽  
Test Method ◽  
Measuring System ◽  
Drop Calorimetry ◽  
Thermal Testing ◽  
Scanning Calorimetry ◽  
Isoperibol Calorimetry ◽  
Conducting Materials ◽  
Materials Used ◽  
Reference Measurements

Simplified isoperibol calorimetry for thermal testing of dielectric and conducting materials A simplified isoperibol calorimetry method for measuring specific heat in solids is described. Taking advantage of the classical Nernst dependency the specific heat is calculated from time-domain temperature curves registered for a sample forced heating and natural cooling phase. In order to improve accuracy of the measurements a correction factor, taking into account the heat transferred to the surrounding, is introduced along with a procedure of statistical elimination of unavoidable measurement deviations. The method is implemented in a simple and straightforward measuring system involving no vacuum calorimeter. The method is applicable for quick and routine specific heat measurements performed on small solid dielectric or metallic specimens at near-room temperature. Test results of various materials used commonly in electrical engineering are demonstrated and discussed as well as comparison to drop calorimetry and differential scanning calorimetry reference measurements is included. The overall repeatability of the test method and the simplified apparatus is estimated as not worse than 2.6%.

REPRODUCIBILITY OF RADON-IN-WATER MEASUREMENTS BY EMANOMETRY TECHNIQUE

2020 ◽  
Vol 191 (2) ◽  
pp. 166-170
Author(s):  
C Di Carlo ◽  
G Venoso ◽  
L Lepore ◽  
M Ampollini ◽  
C Carpentieri ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Detection Limit ◽  
Water Samples ◽  
Test Method ◽  
Measuring System ◽  
Measuring Systems ◽  
Detection Techniques ◽  
Transport Container ◽  
Sample Transfer ◽  
Radon In Water

Abstract The emanometry test method is one of the detection techniques of radon in water satisfying requirements of Directive 2013/51/Euratom with regards to the detection limit. Quality assurance (QA) procedures were developed and implemented for a measuring system relying on such a technique. These procedures mainly address the following: (i) the assembling of each component of the degassing circuit, (ii) the sample transfer from the transport container to the degassing vessel and (iii) the control of all the influencing quantities. Three identical measuring systems have been used to analyse in parallel 39 water samples with the aim to evaluate the effectiveness of QA procedures in terms of reproducibility. The results showed quite low variability (<15% for the 84% of measurements in the range 10–100 Bq L−1) among the three different measuring systems.

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