4)
Securely hold the cylinder of the sampling pump. Then, pull out the handle fully along the red guide
line on the pump shaft to the lock position, and wait 1 minute. At this time, make sure that the flow
finish indicator is not white.
NOTE: Never hold the counter when using a GV-110. It may hamper proper operation of the
counter and may cause a malfunction.
5)
Unlock the handle by turning it more than ¼ turn and guide it back gradually. Confirm the handle
returns to the initial position and the guide line on the pump shaft is not seen. Also confirm the finish
indicator has been popped out again.
When the handle is unlocked, be sure to guide it back gradually by applying a little resistance.
Otherwise the handle will spring back due to the vacuum in the pump cylinder and possibly
damage internal parts or injure yourself.
