Watlow D4T Data Logger
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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. Filtering smooths signal fluctuations. Increase the time to
increase filtering. Excessive filtering slows the input’s response.
Range: 0.0 to 60.0 seconds
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 Error parameter.
Clear Error
Set this parameter to
Clear
to reset the input error after correcting the condition that caused
it.
Options:
Ignore, Clear
Thermistor Input Errors
Error Status
Description
None
No error is detected.
Open
A sensor is broken or disconnected.
Shorted
A sensor has failed or is shorted.
Measurement Error A measurement error has occurred.
Bad Calibration
The data logger has not been calibrated.
Ambient Error
The ambient temperature is outside of the data logger's operating
range.
Fail
A measurement failure has occurred.
Not Sourced
An input signal is not connected to a function block's output.
Stale Data
Data sourced from another data logger has become unavailable.
Math Error
A calculation has no defined result (such as divide by zero).
