20
Pneumatic Division
Richland, Michigan
www.wilkersoncorp.com
ER09 / ER19 Electronic Proportional Regulators
FRL-SIF-621
Glossary
Hysteresis – The mechanical limits of accuracy of
the unit. The regulator cannot be adjusted within the
inherent mechanical limits of the design.
Dead Band – The minimum limit of accuracy at which
the regulator is set for normal operation. This band
must be equal to, or exceed, the inherent design limits
of the regulator or the hysteresis band.
Proportional Band – The band used for setting
reaction sensitivity of the regulator. The regulator
senses the excursion from the set pressure and adjusts
response in relation to the degree of excursion beyond
the dead band. This band must exceed the dead band
of the unit.
Proportional Effect – The speed at which the unit
approaches P2 (secondary pressure).
Sensitivity – The smallest change in the control signal,
or feedback signal, to cause a change in regulated
output pressure.
Repeatability – a measurement of how consistently
the unit can reproduce an output pressure in relation
to a specific set pressure.
Linearity – A measure of how closely the relationship
of output pressure vs. the control signal deviates from
a straight line function.
PNP Output – Referred to as a “Sourcing” open
collector transistor output where the voltage sources
towards 24VDC when activated.
NPN Output – Referred to as a “Sinking” open
collector transistor output. The output sinks towards
0VDC when activated.
Safety Guide
For more complete information on recommended application
guidelines, see the Safety Guide section of Pneumatic Division
catalogs or you can download the Pneumatic Division Safety
Guide at: www.wilkersoncorp.com
