BS ISO 21360:2007
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Vacuum technology. Standard methods for measuring vacuum-pump performance. General description
Hardcopy , PDF
06-17-2020
English
07-31-2007
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Test Methods
5.1 Volume flow rate (pumping speed) measurement with
the throughput method
5.2 Volume flow rate (pumping speed) measurement with
the orifice method
5.3 Volume flow rate (pumping speed) measurement with
the pump-down method
5.4 Measurement of the base pressure
5.5 Measurement of the compression ratio and the
critical backing pressure
Annex A (informative) Mean free path of some important gases
Annex B (informative) Measuring uncertainties
Bibliography
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