Correct control voltage was previously observed but the contactor did not move. The circuit is now isolated and proved dead for a coil-resistance check. The exercise grades the complete measurement plan—state, mode, placement, range and expected evidence—before a tool is applied.
Follow the workflow
Measure across A1 and A2 with the coil isolated from parallel suppression and wiring paths. One measurement should answer one branch of the fault tree; collecting numbers without a decision rule creates more ambiguity.
Do this in the product
Open the registered Isolated contactor coil case and leave the answer fields untouched until you can justify each choice.
Open the exerciseThe case expects “isolated proved dead”. Resistance and continuity need isolation and prove-dead evidence; live voltage or current needs competent authorisation and rated equipment.
Do this in the product
Choose the circuit state before selecting a meter function so the safety boundary drives the method.
Open the exerciseThe registered plan uses resistance mode, across component placement and a 2000 full-scale range. These choices must agree electrically.
Do this in the product
Submit the plan and use the individual server checks to find the first unsafe or non-diagnostic choice.
Open the exerciseThe expected evidence is Finite manufacturer-consistent resistance. A different reading is useful only when it leads to a documented next check rather than an immediate component replacement.
Do this in the product
Save the graded result for a portfolio record or assign it through a paid team training path.
Open the exerciseCore concepts
The simulator creates a repeatable result; these concepts make that result transferable to real vendor software and supervised practical work.
The expected reading and next action are written before the probes move, reducing random fault finding.
Voltage is measured across two points, current through a series path and resistance only on an isolated circuit.
A multimeter result is one item of evidence. It does not replace isolation, category ratings, process knowledge or specialised test instruments.
Continue in the workspace
Run the foundation exercise publicly, then use a subscription for advanced challenges, saved configurations, full attempt history, sharing, assigned paths and team reporting.
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