Partlow MIC 8200 Installation And Operation Manual page 71

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Engineering Units Upper and Engineering Units Lower
These Program mode parameters are used with volt, millivolt, and milliamp inputs. The
Engineering Units Upper Euu should be selected as the value to be displayed when the input
is at maximum. Th Engineering Units Lower EuL should be selected as the value to be
displayed when the input is at minimum.
First Output Position
This parameter is adjustable from -1000 to 1000 units and represents a shift or offset of the
on-off actuation points or proportional band for the first output relative to the normal position.
For example, a negative value could be used to offset an expected overshoot. First
OutputPosition also shifts the proportional band with respect to the process value range
output of which integral action is inhibited. Factory default is 0. Display code is FoP.
Hysteresis for Alarm Outputs
This Program mode parameter is used to create a deadband for the alarm output(s). For
example, a process direct alarm is selected for 200 °/units with a HyAo set for 20°/units. The
output assigned will turn on when the process value exceeds 210°/units. The output will turn
off when the process value goes below 190°/units.
Be aware that this parameter will also effect the output action if used as a Deviation or
Deviation Band Alarm. (i.e.the Deviation Band will be increased by the amount of HyAo
selected)
This parameter is adjustable from 0 to 300 °/units. The factory default is 3. The display code
is HyAo.
Hysteresis for Control Outputs
This Program mode parameter is used to create a deadband for On/Off control outputs. This
parameter is adjustable from 0 to 300 degrees/units. Factory default is 3. This feature can be
used to reduce the cycling of the on/off outputs. The display code is HyCo.
Input Correction
This parameter is used to adjust the process variable value to compensate for sensor errors.
This Program mode parameter is selectable from -300 to + 300 degrees/units. The factory
default is 0. The display code is iCor.
Manual Reset
This parameter is adjustable from -1500 to 1500 units representing a manual shift of propor-
tional band(s) relative to the normal position. Manual reset is intended to be used when
automatice reset is not used to allow compensation for deviations from setpoint which remain
after the process has stabilized. Factory default is 0. Increasing the value increases the
process variable, i.e. if the process variable stabilized too low, increase the manual set.
Integral action, and conversely reset-windup inhibit apply over the same process value range
regardless of the manual reset value. The display code is rSt.
Process Filter Factor
This Program mode parameter is used to dampen the process value used to calculate output
action. The process value is averaged to dampen the control outputs. This parameter is
adjustable from 1 to 20 . Factory default is 1. The display code is PFF.
Process Retransmission Output
This parameter allows for a linear milliamp proportional output relative to the process value.
The current output may be scaled over a range selectable by the user. This output can be
used to supply the process variable signal to remote chart recorders, panel meters, and data
logger instruments.