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Watlow D4T Data Logger
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Chapter 5 Function Reference
Process Errors (
cont .
)
Function
Error Condition
Result
Switch Over
When SW has no error
The output’s value and error follow the
input selected by the digital input.
When SW has an error
The output value and error follow input
1.
Differential
X or Y or both have errors
The output is equal to the offset and
has an error.
Ratio
X or Y or both have errors
The output is equal to the offset and
has an error.
Y equals zero
The output is equal to the offset and
has an error.
Add
Any or all inputs have errors
The output is equal to the offset and
has an error.
Multiply
Any or all inputs have errors
The output is equal to the offset and
has an error.
Absolute Dif-
ference
X or Y or both have errors
The output is equal to the offset and
has an error.
Maximum
One or more, but not all inputs
have errors
The output value is the maximum of
the inputs with no errors and the out-
put has no error.
All inputs have errors
The output’s value and error follow the
first input.
Minimum
One or more, but not all inputs
have errors
The output value is the minimum of the
inputs with no errors and the output
has no error.
All inputs have errors
The output’s value and error follow the
first input.
Square Root
X has an error
The output is equal to the offset and
has an error.
X is less than zero
The output is equal to the offset and
has an error.
Viasala
%RH or T or both have errors
%RH has an error
Pressure to
Altitude
X has an error
The output’s value is calculated as usu-
al and has an error.