Watlow F4T User Manual

Watlow F4T • 194 • Chapter 5 Function Reference
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
Filter
Set the amount of filtering to apply to the input. Filtering smooths signal fluctuations. In-
crease the time to increase filtering. Excessive filtering slows the input’s response.
Range: 0.0 to 60.0 second
Input Error Latching
Set whether an input error persists until it is cleared or clears automatically when the sensor
signal returns to a normal level.
Options:
• Off: error clears automatically once the input returns to normal
• On: error remains active until the input returns to normal and the error is cleared by
the Clear Latch parameter
Clear Error
Set this parameter to Clear to reset the input error after correcting the condition that caused
it.
Options: Ignore, Clear

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