Watlow F4T User Manual

Watlow F4T • 167 • Chapter 5 Function Reference
Pressure Units
Set the units of pressure input.
Options: PSI, mbar, Torr, Pascal, Atmosphere
Altitude Units
Set the units for the altitude output.
Options: Feet, Kilofeet
Offset
Adjustment added to the result of the calculation.
Range: -99,999.000 to 99,999.000
Filter
Set the amount of filtering to apply. Filtering smooths signal fluctuations. Increase the time to
increase filtering. Excessive filtering slows the function’s response.
Range: 0.0 to 60.0 seconds
Dew Point
This function calculates the dew point based on temperature and relative humidity. A filter
and offset may be applied to the calculated value. The output is an absolute temperature.
Signals
Direction
Label Type Function
Receivers
T Analog Temperature measurement
RH Analog Relative humidity measurement
Transmitter - - - - Analog Filtered calculated dew point plus the offset
Function
To calculate the temperature at which water vapor will condense based on the temperature
and relative humidity of an environment, set Function to Dew Point.
Offset
Adjustment added to the result of the calculation.
Range: -99,999.000 to 99,999.000
Filter
Set the amount of filtering to apply. Filtering smooths signal fluctuations. Increase the time to
increase filtering. Excessive filtering slows the function’s response.
Range: 0.0 to 60.0 seconds

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