Dwyer SCZ10 - Manual (Page 8)

Alarm hysteresis
ON
OFF
Main setting +Alarm setting point
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Alarm action delayed timer setting
• Sets the alarm action delayed time. Alarm output activates
when the setting time has passed after the input enters alarm
output range.
• This setting item is not indicated when “No alarm” action is
selected in [Alarm action selection].
• 0 to 9999 seconds
0 seconds
Direct/Reverse selection
• Selects reverse (heating) or direct (cooling) control action.
• Reverse
(Heating) action:
Direct (Cooling) action :
Reverse
(Heating) action
AT bias setting
• Set the PID auto-tuning bias value.
• This setting item is not indicated when DC voltage or current
input is selected in [Sensor selection] and when action is not
PID, either.
• 0 to 50°C (0 to 100°F) or 0.0 to 50.0°C (0.0 to 100.0°F)
20°C
Setting value digital transmission bias setting
• The desired value is the value that adds the one set in the
setting item to the received value by setting value digital
transmission.
• This setting item is indicated only when [Option: C5] is added.
• ±20% of scaling span (DC voltage and DC current: Decimal
point place follows the selection.)
0
Controller/ Converter function selection
• Selects controller or converter function.
• This setting item is indicated only when the control output
is DC current output type.
• Controller function: , Converter function:
Controller
function
Sensor correction function
This corrects the input value from the sensor. When a sensor cannot be set at a location where control
is desired, the sensor measuring temperature may deviate from the temperature in the
When controlling with multiple controllers, the accuracy of the sensors has influence on the control.
Therefore
In such case the control can be set at the desired temperature by shifting the input value of the sensors.
Loop break alarm
The alarm will be activated when the process variable (PV) does not rise as much value as the span or
greater within the time it takes to assess the Loop break alarm after the manipulated variable has re
0% or the output low limit value. When the control action is Direct (Cooling), the alarm acts conversely.
Energized/Deenergized function
[If temperature alarm action Energized is selected]
When the alarm output indicator is lit, the alarm output (between terminal 8 and 9) is conducted (ON).
When the alarm output indicator is unlit, the alarm output is not conducted (OFF).
[If temperature alarm action Deenergized is selected]
When the alarm output indicator is lit, the alarm output (between
When the alarm output indicator is unlit, the alarm output is conducted (ON).
High limit alarm (Energized setting) High limit alarm (Deenergized setting)
(Fig. 3.5-1) (Fig. 3.5-2)
ON
OFF
Main setting +Alarm setting point
Alarm hysteresis
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