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Conditional
Recording on Temperature and ON Time Data Logging
Overview
The following program NET samples two thermocouple inputs and records
the temperatures only when they exceed a set point. It is also assumed
that when the temperature exceeds the set point that a burner is on and
this ON time is also recorded to memory.
Details
The sample rate clock samples two thermocouples every five minutes.
The temperatures are sent to probe points for real-time viewing, memory
icons for recording and to a comparator. The temperatures are compared
to the constant (K) of 1000'F. When either temperature exceeds 1000
degrees the comparator turns ON and enables the memory icon and allows
the data to be stored in memory. A time data stamp will appear with
each data sample. The Constant can be programmed with any value.
The comparators
also feed an OR gate allowing either ON signal from the comparator to
trigger the stop watch icon. The stop watch icon will return the number
of seconds either temperature was greater than 1000F. The seconds are
summed, converted to minutes and stored to memory.
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Data
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8363-6F Center Drive
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Phone: (619) 698-3300 |
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