
Watlow D4T Data Logger
•
143
•
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 to 55,555°C
Filter
Set the amount of filtering to apply to the in-
put. Filtering smooths signal fluctuations. In-
crease 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
Resistance Temperature Device (RTD) 100 and 1000 Ohm
Use this block to condition a temperature measurement made with an RTD. This FB is found
on the canvas of the FB diagram. The number of these FBs that are available depends on the
number of flex modules with Universal Inputs installed and configured as an RTD with two or
three wires.
The module number shown on the block is the number of the data logger’s slot that houses
the flex module with the universal input. The Universal Input number indicates the specific
input on the flex module.
Signals
Direction
Label
Type
Function
Transmitter
- - - -
Analog
Supplies scaled, absolute temperature ± the offset as a
connection to another FB.
Name
Uniquely identify this FB using up to 20 alphanumeric characters.