Nor-Cal SDC15 Controller - Manual (Page 53)

■ Temperature unit
When the PV input type is T (thermocouple) or R (RTD), the temperature unit can
be selected.
• When the PV input type is T (thermocouple) or R (RTD), the display and setting
can be made.
■ Cold junction compensation (T/C)
When the PV input type is T (thermocouple), any of the following can be selected:
• The cold junction compensation (T/C) is performed inside this unit.
• The cold junction compensation (T/C) is not performed inside this unit since
an external cold junction compensation unit, such as ice bath is used.
• When the PV input type is T (thermocouple), the display and setting can be
made.
■ PV square root extraction dropout
When the PV input type is L (DC voltage/DC current), a dropout value can be set
so that the result of the PV square root extraction used to convert the pressure
(differential pressure) into the flow becomes "0".
• When the PV input type is L (DC voltage/DC current), the display and setting
can be made.
• Details of PV square root extraction
The calculation input in % and the calculation result in % are expressed as PVin
and PVout, respectively.
When the PV input is the PV square root extraction dropout set value or more
and less than 100.0%, the control formula becomes as shown below.
PVout = √PVin ÷ 100 X 100
When the PV input is larger than 0.0% and smaller than the PV square root
extraction dropout set value, PVout = 0.0%.
When the PV input is 0.0% or less or 100.0% or more, the square root extraction
is not performed. Therefore, PVout = PVin.
Item (Setting display/bank) Display Contents Initial value User level
5-3
Chapter 5. DETAILED DESCRIPTION OF EACH FUNCTION
Temperature unit
(Setup setting/Setup bank) 0: Celsius (˚C)
1: Fahrenheit (˚F). 0 Simple,
Standard,
High function
Item (Setting display/bank) Display Contents Initial value User level
Cold junction
compensation (T/C)
(Setup setting/Setup bank) 0: Cold junction compensation (T/C) is
performed (internal).
1: Cold junction compensation (T/C) is not
performed (external).
0 High function
Item (Setting display/bank) Display Contents Initial value User level
PV square root extraction
dropout
(Setup setting/Setup bank) 0.0%: Square root extraction is not performed.
0.1 to 100.0% 0.0% High function