This International Standard specifies methpds for acceptance tests, and technical conditions for the supply of displacement compressors including packaged versions (see annex C).
It gives detailed instructions on the measurement of volume flow r?te and power requirement and means of adjusting the measured values to guarantee conditions.
NOTE — This International Standard may be used for full load acceptance testing of lobed rotary (Roots'1 blowers.
Three types of test are covered, as follows :
a) Acceptance test
This is a full performance test carried out in accordance with this International Standard.
b) Type test
This is also a full performance test carried out in accordance with this International Standard, to establish typical performance of a specrfic model of compressor produced in signrficant quantities. The manufacturer shall select at ran-dom one typical compressor from a batch of identical compressors for this type test. The test shall be witnessed by an independent expert from, or approved by, a reputable institution.
Provided the production compressors are identical with the compressor type tested, it is strongly recommended that the performance results of the type test should be used in catalogues and descriptive literature.
c) Simpfified test
In annex A reference is made to a simplified compressor test. This is a test where volume flow r?te and power input are measured using the manufactureKs normal test-stand instrument and equipment.
This test is normally carried out when a type test of an identical compressor has already been made. Provided the performance results obtained are within the tolerances listed in table 5, then the performance of this series-produced compressor is deemed to be the same as the type performance results. (See annex A for full particulars.)
This International Standard also specifies the operating and testing conditions wtiich shall be agreed between the manufac-turer and the purchaser (see annex B).