FujiFilm PB-30 Operation Manual page 41

(3) Make sure that the indications on the pressure indicator 1
and 2 are stable at about -6 kPa.
(4) Wrap the balloon on the over-tube lightly with your hand.
(5) Press the toggle switch 1 of the remote switch to supply
air.
(6) Make sure that the balloon inflates and the indication of
the pressure indicator is stable at about +5.6 kPa.
[Note]
The pressure indicator becomes an orange display
momentarily during air feed. But, it happens by the timing
of air feed and pressure display, it is not abnormal.
Chapter 6 Preparation and Inspection
41