International intercomparison of pressure standards in the pneumatic pressure region 0.4-4.0 MPa between NPL (India) and PTB (FRG)

Sharma, J. K. N.; Jain, Kamlesh; Bandyopadhyay, A. K.; Jager, Johan de

doi:10.1088/0022-3735/21/7/001

Cited by 20 publications

(7 citation statements)

References 6 publications

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“…Pressure was measured with a static highpressure unit obtained from Setaram of France accurate to ±0.01 MPa. This unit was calibrated by the National Physical Laboratory, New Delhi, against its transfer standard gauges (7). The reference pressure was taken as 106 Pa. Calibration of the densimeter was done with water and air, and all the measurements were made with reference to water.…”

Section: Methodsmentioning

confidence: 99%

Densities, molar volumes, cubic expansion coefficients, and isothermal compressibilities of 1-alkanols from 323.15 to 373.15 K and at pressures up to 10 MPa

Garg¹,

Banipal²,

Ahluwalia³

1993

J. Chem. Eng. Data

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Section: Methodsmentioning

confidence: 99%

Densities, molar volumes, cubic expansion coefficients, and isothermal compressibilities of 1-alkanols from 323.15 to 373.15 K and at pressures up to 10 MPa

Garg¹,

Banipal²,

Ahluwalia³

1993

J. Chem. Eng. Data

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“…The zero pressure effective area of NPLI-4 is also obtained by cross-floating against another large diameter primary piston gauge, NPLI-P10 and was found to be 8.392438x10 −6 m 2 with a combined relative uncertainty of 1.41x10 −5 (Singh et al, 2016), which agrees to about 2 ppm of the value obtained against the UIM, as mentioned above. NPLI-4 has also participated in many international Inter-comparisons (Bandyopadhyay et al, 2003; Driver et al, 2007; Sharma et al, 1988).…”

Section: Details Of Gauge Understudy and Standard Usedmentioning

confidence: 99%

Investigation of contribution of number of trials in Monte Carlo simulation for uncertainty estimation for a pressure balance

Singh

Bura

Kaushik³

et al. 2021

Transactions of the Institute of Measurement and Control

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It is well established that the estimation of measurement uncertainty is vital for the validation of any measurement and is an essential parameter of quality assurance. Apart from the conventional technique of law of propagation of uncertainty (LPU), which has many limitations, Monte Carlo simulation (MCS) technique has become an essential tool for the estimation of measurement uncertainty in various fields of metrology. The most critical factor in MCS is the generation of random numbers of the input quantities according to their probability distributions. The number of Monte Carlo trials to generate these random numbers significantly affects the results. In particular, the required number of trials is also affected by the parameter for which the uncertainty is to be estimated. Hence, in the current paper, the effect of selection of the number of trials on the random number generation and the resulting output in terms of standard deviation (SD) is investigated for the uncertainty in the effective area of a pneumatic reference pressure standard (NPLI-4) at the CSIR-National Physical Laboratory of India. The simulation results thus obtained are compared amongst themselves, with an adaptive approach as well as with the experimental results. The outcomes are analyzed and discussed in detail.

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“…The masses used for calibration are of S2 class and made up of nonmagnetic stainless steel. NPLI-8A has participated in bilateral comparison with PTB Germany in 1988 [5] and has also participated in APMP.M.P.-K1c key comparison [6]. It was also used as the reference standard in 2003 in bilateral comparison with NIST, USA [7].…”

Section: Description Of Standard Used (Npli-8a)mentioning

confidence: 99%

Reliability and long term stability of a digital pressure gauge (DPG) used as a standard- a case study

Singh

Kumar

Sharma

et al. 2011

MAPAN

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The current paper reports the stability of a pressure dynamometer with a full scale pressure of 60 bar over nine years of operation. Since the stability of this digital pressure gauge depends on factors like repeatability, hysteresis, non-linearity, relative deviation etc, a systematic study has been carried out on each of these components. Finally, a comparison of the calibration factors and the estimated expanded uncertainty is made from the collected nine years calibration database. It has been found that the performance of the equipment showed consistent results for about 5 years after which a slight shift in the parameters described above has set in. But, the overall performance of the equipment remains excellent over the period studied within the limit of experimental uncertainty.

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International intercomparison of pressure standards in the pneumatic pressure region 0.4-4.0 MPa between NPL (India) and PTB (FRG)

Cited by 20 publications

References 6 publications

Densities, molar volumes, cubic expansion coefficients, and isothermal compressibilities of 1-alkanols from 323.15 to 373.15 K and at pressures up to 10 MPa

Densities, molar volumes, cubic expansion coefficients, and isothermal compressibilities of 1-alkanols from 323.15 to 373.15 K and at pressures up to 10 MPa

Investigation of contribution of number of trials in Monte Carlo simulation for uncertainty estimation for a pressure balance

Reliability and long term stability of a digital pressure gauge (DPG) used as a standard- a case study

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