Two-Pan Equal-Arm Balances

Gupta, S. V.

doi:10.1007/978-3-642-23412-5_2

Cited by 1 publication

(2 citation statements)

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“…The aim is to prove that a slightly higher weight (300 mg) can produce a movement higher than a segment of scaling. The best estimate of an analogue indicating device is determined by visual interpolation we call "AP" the number of times that the needle falls within two adjacent graduation lines [13] [17] [18]. In a practical sense, each segment of scaling was subdivided into 5 AP (see Figure 2).…”

Section: Sensitivity Analysismentioning

confidence: 99%

“…Sensitivity is defined as the smallest weight change on the balance (it is considered that a diving-bell manometer works analogously to an equal arm balance-see Figure 1). This is necessary to produce a movement of a unit of change on the indicator element (in this particular case, the indicator needle) [13]. When the weight is on the left plate, the needle moves to the right.…”

Section: Introductionmentioning

confidence: 99%

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Measurement of the Sensitivity for Diving-bell Manometer

Caviedes¹

2018

ACTA IMEKO

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Diving-bell manometers are devices mainly used for low-gauge measurements, with a variety of industrial and medical applications. At the Colombian <em>Instituto Nacional de Metrología</em>, a Junkalor Dessau TMG 25/1104 diving-bell manometer was subjected to sensitivity verification, with 200 mg as the discrimination threshold. Considering that this manometer works analogously to an equal arm balance, sensitivity is defined as the weight change on the balance that is needed to produce a movement larger that the smallest estimable fraction of a scale interval determined by visual interpolation component (resolution on the indicator element). Three set data points were evaluated: the first, with 20 g placed on each plate; the second, with 19.7 g on the left plate and 20 g placed on the right plate; and the third, with 20.3 g on the left plate and 20 g on the right plate. Recommendations for use of the diving bell are made and the resolution for the device was determined.

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Section: Sensitivity Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%