Vetter Lifting bags 1 bar (14.5 psi) Test Equipment - Manual (Page 7)

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3.2.2 Preparations for testing
Connect the air source, e.g. pressure regulator 200/300 bar, to the
input coupling of the controller. Adjust the output pressure on the
regulator to approximately 2-3 bar.
Connect inflation hose to the output of the controller and close
the open end with a blind coupling 1/0.5 bar and couple the test
manometer 0.5/1 bar.
3.2.3 Operation
Open the shutoff valve on the pressure regulator. Carefully open
the piston valve or ball valve. Monitor and compare the pressure
increase on the manometer of the controller and the test mano-
meter. Increase the pressure until the safety valve activates (per-
missible tolerance according to GUV-G 9102, +/- 10 %). Close the
piston valve or ball valve and check to see if the safety valve per-
fectly closes.
3.2.4 Pressure test for lifting bags 0.5 bar/1 bar
The required pressure test is, in connection with the manufacturer´s
test, carried out by the manufacturer or his mobile inspection ser-
vice. Therefore a pressure test made by a specialist of the user is
not made.
4.1.1.2 Five yearly test
Pneumatic lifters (without compressed air bottle) are to be in-
spected if there is any doubt about safety or reliability but at
least every 5 years by the manufacturer.
Excerpt from GUV-G 9102
4. Testing the mini lifting bags 8 bar
4.1 Test intervals
9 After each opeation/period of use
Visual test by the user
9 Yearly test
Visual test and function test by a specialist according to the
preliminary stipulations in GUV-G 9102
9 Every 5 years, after repair or if there is any doubt about
safety
Pressure test only to be made by a specialist according to the
preliminary stipulations in GUV-G 9102 with the addition trai-
ning according to GUV-G 9102, section 4.2.1.2.