Agilent Technologies TwisTorr 305 FS User Manual page 223

Technical Information
Black rectangles as shown below may be displayed at any time in the first and last
box of the bottom line of the display (opposite the LS / AG / R1 / R2 captions). The
meaning of these rectangles is as follows:
LS → the controller is at LOW SPEED
AG → the Gauge is connected to the controller
R1 → relay (set point) R1 is active
R2 → relay (set point) R2 is active
Figure 58
Agilent TwisTorr 305 FS Remote Controller User Manual
LS
AG
R1
R2
223