Extech Instruments 96VFL Series User Manual page 18

FIGURE 6.3: PROPORTIONAL BAND EXAMPLES
Pb setting too narrow
When Proportional Band is set
too narrow, the PV rises too
quickly and typically overshoots
the SV, as shown.
Pb set correctly
When Proportional Band is set
correctly, the PV rises to the SV
in the desired time with little
undershoot. A slight oscillation of
the PV (within specification) is
typical once the SV is reached.
Pb setting too wide
When Proportional Band is set
too wide, the PV rises too slowly
and may never reach the SV.
VFL Series User Manual v2.0 10/20
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