The calibration of vacuum gauges

Steckelmacher, W

doi:10.1016/0042-207x(87)90051-0

Cited by 15 publications

(4 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The marginal deviations of the literature values from our results are plausible by considering the limits of the piston manometer 38 and the insufficient number of data points in comparison with the versatile evaluated transpiration method in this work. 31,32,39 Comparison: The experimental p−T data of the compounds of interest are depicted in Figure 13.…”

Section: ■ Results and Discussioncontrasting

confidence: 48%

“…Examination of the determined enthalpies of both this work and the literature, as well as visualization of the p–T data sets, revealed rough agreement with the literature values. The marginal deviations of the literature values from our results are plausible by considering the limits of the piston manometer and the insufficient number of data points in comparison with the versatile evaluated transpiration method in this work. ,, …”

Section: Resultsmentioning

confidence: 45%

See 1 more Smart Citation

Crystal Structures of the Commonly Used Plasticizers Ethylene Glycol Dinitrate, Diethylene Glycol Dinitrate, and Triethylene Glycol Dinitrate─Characterization and Discussion of Their Structural Behavior

Lechner

Neuer

Bockmair

et al. 2022

Crystal Growth & Design

View full text Add to dashboard Cite

Ethylene glycol dinitrate (EGDN), diethylene glycol dinitrate (DEGDN), and triethylene glycol dinitrate (TEGDN) are used as plasticizers in propellant mixtures and have been known for more than 100 years. Despite the industrial application and the long history of these compounds, the crystal structures of all three compounds, which are liquids at room temperature, have not been determined. Therefore, in this work, the crystal structures were examined by low-temperature X-ray diffraction, and thus, the bonding properties and crystal packing in the solid state could be compared and discussed for the first time. Furthermore, the compounds were characterized by nuclear magnetic resonance spectroscopy and infrared spectroscopy. The thermal properties were investigated by DTA (differential thermal analysis) measurements, and the experimental vapor pressures were measured with the chromatography-assisted transpiration method. The densities at room temperature (for the liquids) were measured by gas pycnometry, and the energetic properties were calculated using the EXPLO5 code. Moreover, a more in-depth analysis of the different sensitivities through discussion of the Hirshfeld surfaces, created based on their crystal structures, was performed to compare their sensitivities in the solid state.

show abstract

Section: ■ Results and Discussioncontrasting

confidence: 48%

Section: Resultsmentioning

confidence: 45%

Crystal Structures of the Commonly Used Plasticizers Ethylene Glycol Dinitrate, Diethylene Glycol Dinitrate, and Triethylene Glycol Dinitrate─Characterization and Discussion of Their Structural Behavior

Lechner

Neuer

Bockmair

et al. 2022

Crystal Growth & Design

View full text Add to dashboard Cite

show abstract

“…In Figure 1 and equations included in this work, 𝑉 𝑃 is the volume of the small tank, 𝑉 𝐺 is the volume of the large tank, 𝑇 𝑖 is the initial temperature of the process, 𝑇 𝑓 is the final temperature of the process, 𝑃 𝑖 is the initial pressure of the process in the small tank, 𝑃 𝑖,𝐺 is the initial pressure of the process in the large tank, which should be as close as possible to zero, and 𝑃 𝑓 is the final pressure of the process. To further reduce the pressure, it is possible to repeat the expansion process, using the initial pressure resulting from the previous expansions [8]; the lower achievable limit is imposed by the level of vacuum that can be generated in the large tank, and by the effects of sorption and degassing in the tanks and the instruments under test [18].…”

Section: Static Expansion Systemsmentioning

confidence: 99%

“…walls of the materials, a necessary procedure to maintain ultrahigh and superior voids [18], [19]. Other aspects that have been studied in static expansion systems are the determination of tank volumes by methods other than gravimetry [13], [24] and the effect of the inhomogeneity of temperature in the tanks on the process [8].…”

Section: Approximate Volumes Of Tanks (L) Pressure Range (Pa) Referencementioning

confidence: 99%

Analysis of the mathematical modelling of a static expansion system

Mora¹,

Franco²,

Moreno³

et al. 2021

ACTA IMEKO

View full text Add to dashboard Cite

Static expansion systems are used to generate pressures in medium and high vacuum and are used in the calibration of absolute pressure meters in these pressure ranges. In the present study, the suitability of different models to represent the final pressures in a static expansion system with two tanks is analysed. It is concluded that the use of the ideal gas model is adequate in most simulated conditions, while the assumption that the residual pressure is zero before expansion presents problems under certain conditions. An uncertainty analysis of the process is carried out, which leads to evidence of the high importance of uncertainty in a first expansion over subsequent expansion processes. Finally, an analysis of the expansion system based on uncertainty is carried out to estimate the effect of the metrological characteristics of the measurements of the input quantities. Said design process can make it possible to determine a set of restrictions on the uncertainties of the input quantities.

show abstract

Vakuummeßgeräte Teil 3: Genauigkeit und Kalibrierung

Jitschin¹

1990

Vak Forsch Prax

View full text Add to dashboard Cite

Bei &r Auswahl eines Vakuum-MeJgerates spielt hau& die Genauigkeit eine wesentlicheRolle. Je nach Druckbereich werden Gerate mit unterschiedlichen Funktionsprinzipien in verschiedenen Qualitatsstufen angeboten. Die Gerate zeigen iiblicherweise den Zustand d e s Vakuums in Druckeinheiten (Millibar oder Pascal) an, detektieren jedoch im Hoch-und Ultrahochvakuumbereich nicht unmittelbar den Druck sondern andere Eigenschaften des Gases. Um die Druckanzeige zu erhalten, kalibrieren die Hersteller die Gerate mit Hiwe bekannter Driicke. Die mit einem Vakuum-MeJgerat erzielbare Genauigkeit hangt somit von der Qualitat der Kalibrierung als auch von der Stabilitat des Gerates in Bezug auf die Zeit ab.

show abstract

The calibration of vacuum gauges

Cited by 15 publications

References 69 publications

Crystal Structures of the Commonly Used Plasticizers Ethylene Glycol Dinitrate, Diethylene Glycol Dinitrate, and Triethylene Glycol Dinitrate─Characterization and Discussion of Their Structural Behavior

Crystal Structures of the Commonly Used Plasticizers Ethylene Glycol Dinitrate, Diethylene Glycol Dinitrate, and Triethylene Glycol Dinitrate─Characterization and Discussion of Their Structural Behavior

Analysis of the mathematical modelling of a static expansion system

Vakuummeßgeräte Teil 3: Genauigkeit und Kalibrierung

Contact Info

Product

Resources

About