Negative Temperature Ranging; Manual Mode (Auto/Manual) (Function 0 Option 4-100); Park Mode; Linear Process Inputs - Omega CN9000A Series User Manual

3.7 NEGATIVE TEMPERATURE RANGING

The following sensor types can be used for negative temperatures.
The negative value shown against each type is automatically set
by the choice of sensor (Function .16) and requires enabling with
Function .17, Option 1.
Type T:
Pt100:
Type N:
Type K:
3.8 MANUAL MODE (AUTO/MANUAL) (FUNCTION 0 OPTION
4-100)
Enables the heater power to be manually adjusted in the event of
a sensor break, thus avoiding a plant shutdown at an inconvenient
time. The duty cycle monitor (DCM) provides a guide to a suitable
manual heat power setting. This Manual Mode function is Function
.0, Options 4 through 100. All three of the Error Indication LEDs
are on when unit is in Manual Mode. Display shows a flashing
number that represents % output followed by an H (for % heat).
Example: at 50%, Manual Mode display shows 50H with the 50
flashing.

3.9 PARK MODE

Temporarily switches off SP 1 output, the controller otherwise,
remains fully operational. Normally used during startup, for
example, to disable a fast load to adjust to setpoint and then start
autotune or to cool from setpoint. The park mode function is
Function .0, Option 3. All three of the error Indication LEDs are on
when unit is in Park Mode.

3.10 LINEAR PROCESS INPUTS

Five linear inputs (Function .16, Options 11, 12, 13, 14, and 15)
enable non-temperature process applications to be controlled. The
input signal may be either 0-20 mV or 4-20 mV. Full scale display
is provided for 100, 1000 and 2000 engineering units.
By using a precision one (1) ohm resistor, a
4-20 mA DC or 0-20 mA DC input can be
converted to 4-20 mV or 0-20 mV respectively.
36
-90°C, -130°F
-100°C, -148°F
-50°C, -58°F non-linearized
-50°C, -58°F non-linearized
NOTE