BS ISO 21360-2:2020
$142.49
Vacuum technology. Standard methods for measuring vacuum-pump performance – Positive displacement vacuum pumps
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 26 |
This document specifies methods for measuring the volume flow rate, base pressure, water vapour tolerance, power consumption, and the lowest start-up temperature of positive displacement vacuum pumps, which discharge gas against atmospheric pressure and with a usual base pressure <10 kPa.
In this document, it is necessary to use the determinations of volume flow rate and base pressure specified in ISO 21360-1.
This document also applies to the testing of other types of pumps which can discharge gas against atmospheric pressure, e.g. drag pumps.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 6 | Foreword |
| 7 | Introduction |
| 9 | 1 Scope 2 Normative references 3 Terms and definitions |
| 10 | 4 Symbols and abbreviated terms |
| 11 | 5 Test methods 5.1 Measurement of the volume flow rate 5.1.1 Measurement methods 5.1.2 Throughput method |
| 12 | 5.1.3 Pump-down method 5.1.4 Operating conditions 5.2 Measurement of the base pressure 5.3 Measurement of water vapour tolerance 5.4 Determination of the power consumption 5.4.1 General 5.4.2 Measuring conditions 5.4.3 Measuring procedure |
| 13 | 5.5 Lowest start-up temperature 5.6 Measuring uncertainties |
| 14 | Annex A (informative) Measurement of the water vapour tolerance |
| 21 | Annex B (informative) Calculation of the water vapour tolerance |
| 22 | Annex C (informative) Table of the saturation vapour pressure of water |
| 24 | Bibliography |
