BS ISO 6690:2007

Foreword
1 Scope
2 Normative references
3 Definitions
4 Test equipment
  4.1 General
  4.2 Measurement of vacuum
  4.3 Measurement of a vacuum changing over time
  4.4 Measurement of atmospheric pressure
  4.5 Measurement of back pressure
  4.6 Measurement of airflow
  4.7 Measurement of pulsation characteristics
  4.8 Measurement of pump rotational frequency
  4.9 Teatcup plugs
5 Vacuum system
  5.1 General requirements and preparation
  5.2 Vacuum regulation
  5.3 Vacuum pumps
  5.4 Vacuum regulator leakage
  5.5 Vacuum gauge error
  5.6 Vacuum drop in air line
  5.7 Effective volume of interceptor
  5.8 Effective volume of the sanitary trap
  5.9 Leakage in vacuum system
  5.10 Vacuum drop across vacuum taps for bucket milking units
6 Pulsation system
  6.1 Airflow at stall taps
  6.2 Pulsation rate, pulsator ratio, pulsation chamber vacuum
       phases and vacuum drop in pulsator air line
7 Milk system
  7.1 Slope of milkline
  7.2 Milk system leakage
  7.3 Effective volume of receiver
  7.4 Leakage in releaser
8 Milking unit
  8.1 Mouthpiece depth and effective length of liner
  8.2 Teatcup or cluster fall-off air inlet
  8.3 Leakage through shut-off valves of milking units
  8.4 Air vent and leakage into teatcup or cluster
  8.5 Effective volume of buckets, transport cans and
       recorder jars
  8.6 Measuring the vacuum in the cluster
  8.7 Measurement of the vacuum drop from accessories
       attached in the long milk tube
  8.8 Airflow at the end of the long milk tube
Annex A (normative) Laboratory tests of vacuum in the
                    milking unit
Annex B (informative) Alternative method for the measurement
                      of air inlet and leakages in clusters
Annex C (informative) Examples of test procedure to reduce
                      the test work
Annex D (informative) Test report for testing milking machine
                      installations in accordance with ISO 6690

Describes mechanical tests for milking machine installations in order to verify compliance of an installation or component with the requirements of ISO 5707. It also stipulates the accuracy requirements for the measuring instruments.

This International Standard specifies mechanical tests for milking machine installations in order to verify compliance of an installation or component with the requirements of ISO5707. It also stipulates the accuracy requirements for the measuring instruments.

This International Standard is applicable for testing new installations and for periodic checking of installations for efficiency of operation. Alternative test methods may be applicable if they can be shown to achieve comparable results.

Test procedures described in AnnexA are primarily for testing in the laboratory. An example of a field test procedure which can reduce the time and effort involved in testing is given in AnnexC and a corresponding test report in AnnexD.