Watlow F4T User Manual

Watlow F4T • 196 • Chapter 5 Function Reference
Name
Uniquely identify this FB using up to 20 alphanumeric characters.
Thermistor Curve
Set the curve for the thermistor used.
Options: Custom, Curve A, Curve B, Curve C
Coefficient A
Enter the custom resistance coefficient for the thermistor.
Range: -3.4000000E039 to 3.4000000E038
Coefficient B
Enter the custom resistance coefficient for the thermistor.
Range: -3.4000000E039 to 3.4000000E038
Coefficient C
Enter the custom resistance coefficient for the thermistor.
Range: -3.4000000E039 to 3.4000000E038
Resistance Range
Set the maximum resistance to be measured by the thermistor input. Higher settings yield a
wider range with less precision.
Range: 5K, 10K, 20K, 40K
Display Precision
Set how many decimal places are displayed for the process value and associated parameters
such as set points.
Options: Whole, Tenths, Hundredths, Thousandths
Calibration Offset
Set a value to add to the measured input value to compensate for sensor placement, lead
wire resistance or other factors that cause the input to vary from the actual process value
Range: -99,999.000 to 99,999.000°F or units
-55,555.000 to 55,555.000°C

Watlow F4T Specifications

General

Inputs	Thermocouple, RTD, mA, V
Outputs	Relay, SSR, mA, V
Communication	Ethernet, Modbus RTU
Data Logging	Yes
Certifications	CE, UL, cUL, RoHS
Control Modes	PID, On/Off
Power Supply	100 to 240 VAC
Operating Temperature	0 to 50°C
Enclosure Rating	IP65
Display	4.3 in. (109 mm) color touch panel LCD
Control Loops	Up to 4