CEMP-E
TI 810-11
30 November 1998
Manual Reset:
The act of manually restoring control-circuit
electrical continuity after the circuit has been
opened by a safety device.
A feature of the single-loop digital controller
that allows manual adjustment of the analog
output signal when proportional mode control
is used without integral mode control or
derivative mode control.
Measured Variable:
The uncontrolled variable (such as
temperature, relative humidity, or pressure)
sensed by the measuring element.
Microprocessor Controller:
A microprocessor-based controller
(non-analog in processing its internal signals)
that performs a dedicated function and does
not require software programming.
MIN:
Minimum
Minimum-Position Switch:
A manual switch used to set the position of
mixing plenum control dampers to assure
that the minimum quantity of outside air is
introduced by an HVAC system.
MO1, MO2:
Magnetic-Starter Holding coil
Modulating Control:
Control achieved by gradually changing a
controller analog output signal to an actuator
in response to a change in a sensed variable.
MPS:
Minimum-Position Switch
M/S:
Meters per second
MZ:
Multizone
Normally Closed:
A controlled device that closes when its
power supply or input signal is removed.
Normally Open:
A controlled device that opens when its
power supply or input signal is removed.
Normal Mode:
The usual or expected operating condition.
OA:
Outside Air
OCC:
Occupied
Offset:
The difference between the setpoint of a
controller and the actual control point of the
controlled variable, caused by changes in
load.
Glossary-8
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