Azbil SVX100, User Manual

Page: 33 / 84

23
Zero and span adjustment using the switch
Zero and span adjustments can be made pressing the “UP” or “DOWN” button switch. Once
adjustments have been completed, press the button switch a second time to record the new
position.
Since the zero and span adjustments do not interfere with each other, they can be adjusted
independently.
„
Adjustment direction
The feedback lever moves up when the “UP” adjustment switch is pressed.
Fig. 3-2. Adjusting the lever in the upward direction
The feedback lever moves down when the “DOWN” adjustment switch is pressed.
Fig. 3-3. Adjusting the lever in the downward direction
Note)
„
The zero and span adjustment function uses the input signal to identify whether a valve fully
open position (span) adjustment or a valve fully closed position (zero) adjustment is to be
performed. If the input signal is not within the range of ±1 mA of the set current values that
correspond to the valve open and closed position, this function will not operate.
„
Use the adjustment switches only if the supply air pressure is stable and only if the valve can
move freely.