A vacuum vessel transmitter is ranged −100 to 0 kPa and outputs 6.4 mA during a leak test. This page owns that exact calculation job and opens the matching server-graded case rather than a generic calculator.
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The lower range value is -100 and the upper range value is 0 kPa. The engineering span is the difference between those values; it is not automatically zero-based.
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Open the registered Vacuum pressure transmitter case so the grader—not the browser copy—owns the expected result.
Open the exerciseSubtract the 4 mA live zero from 6.4 mA, then divide by the 16 mA measurement span. Keep enough precision until the engineering conversion is complete.
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Calculate the fraction separately before typing the final engineering value into the lab.
Open the exerciseMultiply percent span by the configured engineering span, then add -100 kPa. The registered expected result is -85 kPa within ±0.1 kPa.
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Submit the value and inspect the range, live-zero and tolerance checks returned by the server.
Open the exerciseA calculation mismatch can come from signal measurement, transmitter configuration, PLC card range, program scaling or unit conversion. Preserve the measured current, range, result and timestamp before changing any layer.
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Create an account to retain the attempt, then use a paid workspace to compare cases, keep full history and assign the exercise.
Open the exerciseCore concepts
The simulator creates a repeatable result; these concepts make that result transferable to real vendor software and supervised practical work.
Four milliamps represents the lower engineering value, leaving near-zero current available as fault evidence.
For this Vacuum pressure transmitter, the span is 100 kPa.
The case records the input, expected value, units and ±0.1 kPa acceptance statement instead of returning an unexplained number.
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Run the foundation exercise publicly, then use a subscription for advanced challenges, saved configurations, full attempt history, sharing, assigned paths and team reporting.
Related learning surfaces
Competency and practice field guide
Direct answer
The learner can record range and reference convention, calculate low, midpoint and high values, detect under- or overrange and compare the PLC result with a known source.
Written for instrumentation and PLC learners scaling a transmitter whose lower range is negative gauge pressure and upper range is zero.
Measurand, gauge or absolute reference, lower range −100 kPa, upper range 0 kPa, loop endpoints, input raw range, signed data, units, alarm limits and quality.
Applied vacuum through sensing element and transmitter current to analog input raw value, scaled engineering tag, quality and process decision.
Known low, midpoint and atmospheric-reference conditions produce correct current, raw count and engineering values within declared tolerance.
Zero vacuum, full vacuum, below range, above range, open loop, reversed polarity, wrong reference, unsigned tag, rounding and restart.
A process-reference, transmitter-range, loop, input-mode, raw-range, signedness, scale, unit or quality mismatch.
The loop verified with suitable references, current device data and approved calibration procedure.
Map 4 mA to −100 kPa and 20 mA to 0 kPa using a linear equation, then verify at least the endpoints and midpoint with known inputs.
Zero may mean atmospheric gauge pressure rather than zero absolute pressure; record the transmitter reference convention before scaling.