Super Systems 3 Series - Manual (Page 30)

Operations Manual Series 3
30
Note 3
Mode key locked. Auto/Manual cannot be operated from
the Mode key.
The following sections in this handbook describe the
parameters associated with each subject. The general
format of these sections is a description of the subject,
followed by the table of all parameters to be found in the
list, followed by an example of how to configure or set up
parameters.
Note 4
Meter Configuration
HEAT The meter shows a representation of the heat
output being applied by the control loop to the load. It is
scaled between 0 and 100% full scale deflection.
Op
The meter displays the current Control Output setting
scaled between the low and high output power limits.
COOL The meter shows a representation of the cool
output being applied by the control loop to the load. It is
scaled between 0 and 100% full scale deflection.
C.OP The meter displays the current output power setting
scaled between -100 and 100%, so that a value of zero is
centred in the display. This indicates whether the controller
is currently applying heating or cooling.
w.sp
The meter shows a representation of the current
working setpoint, scaled between the setpoint high and low
limits. It may be used to indicate at what point in the
setpoint range the instrument is currently operating.
PV The meter displays the current Process Variable scaled
between the range high and low values. Provides an
indication of the current temperature relative to the range
of a process.
Err
The meter displays the process error (i.e. the difference
between the current temperature and the setpoint), scaled
between +10 degrees and -10 degrees. This provides a
visual indication of whether the process is close to setpoint.
Amps The meter shows a representation of the
instantaneous current through a load monitored using a
current transformer, scaled between 0 Amps and the
configured range of the Current Transformer. It may be
used to visually indicate the health of the heating elements,
since in normal use it will tend to flick from a low reading
when the heating is off, to a higher reading when the
heating is on. If the needle does not return to a low value,
the SSR may be conducting regardless of the logic signal
driving it. If the needle does not reach the expected level it
is likely that one or more of the heater elements has burned
out.
Lcur
The meter displays a representation of the On State
Current in a load monitored by the current transformer
option. In normal operation it will tend to remain static and
provides an alternative means of monitoring the health of a
heating element to the 'Amps' option.
.