the switch to determine actual operating points
before proceeding with readjustment. Refer to
Figure 4B.4 for location of adjustment.
Adjusting Instructions
1. Adjust the range (screw “A”) to the required
cut-in vacuum setting. Turning the screw
clockwise lowers the cut-in and cut-out
vacuum settings equally.
2. Adjust the di
ff
erential (screw “B”) to the
required cut-out vacuum setting. Turning
the screw counter-clockwise will increase
the cut-out vacuum setting. Turning the
screw counter-clockwise will increase the
cutout vacuum setting only. Di
ff
erential is
the di
ff
erence between cut-in and cut-out
settings.
Lubricated Rotary Vane Laboratory Vacuum Systems
4107 9021 88.01
4B-5
