Voltage Presence Check Calculator
Document an absolute voltage-reading comparison against an entered display threshold and nominal-voltage reference without replacing approved absence-of-voltage procedures.
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Insulation resistance, short-circuit current, pull-box sizing, grounding, bonding, touch voltage, and protection checks.
Published Calculators
Touch Voltage Safety Screen Calculator
Calculate touch voltage from fault current, grid resistance, and touch fraction, then compare it with an entered review value.
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Thermal Scan Temperature Difference Calculator
Estimate ambient rise, absolute temperature difference, and threshold margin from component, ambient, and reference temperatures.
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Test Lead Correction Calculator
Correct a measured resistance reading for test-lead resistance and compare the corrected value with an entered reference threshold.
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Step And Touch Voltage Screen Calculator
Compare grid potential rise, step voltage, and touch voltage with project-entered limits without issuing a personnel-safety conclusion.
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Shock Risk Screen Calculator
Check whether entered shock-review factor rows are recorded, missing, or unknown without classifying risk or producing a work conclusion.
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SCCR Calculator
Compare entered component SCCR with available fault current as a documentation check; no equipment determination is made.
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Restricted Approach Boundary Calculator
Compare a recorded restricted-boundary reference distance with an entered project distance after unit conversion; required boundary selection and entry permission remain outside the result.
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Resistance Measurement Error Calculator
Compare a measured resistance with a reference value and report signed and absolute error in ohms and percent.
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PT Ratio Calculator
Estimate a measured potential-transformer voltage ratio and signed ratio error from primary, secondary, and nominal ratio entries.
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Protective Relay Time Calculator
Apply externally supplied inverse-time relay curve constants to a fault-current multiple and compare the operating time with an entered limit.
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Protective Device Clearing Time Calculator
Compare measured or curve-derived protective-device clearing time with an entered limit and report margin, ratio, and review comparison.
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Protective Relay Pickup Calculator
Convert a secondary relay pickup setting through a CT ratio and compare the primary pickup with available fault current.
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PPE Category Screen Calculator
Compare recorded incident energy with a recorded arc rating and show the entered margin while leaving PPE category selection to qualified review.
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Power Analyzer Sampling Calculator
Compare an analyzer sample rate with the Nyquist screening minimum implied by the entered fundamental frequency and harmonic order.
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Polarity Test Calculator
Estimate voltage magnitude and margin, then compare the measured sign and magnitude with the entered test criteria.
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Phase Sequence Check Calculator
Estimate relative phase angles, then compare the observed sequence and spacing with the entered expectation.
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Oscilloscope Timebase Calculator
Estimate displayed time window, waveform period, and frequency from an entered oscilloscope timebase, division count, and visible cycles.
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Oscilloscope Bandwidth Calculator
Estimate signal-frequency bandwidth needs before checking oscilloscope and probe specifications.
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Meter Burden Voltage Calculator
Estimate meter burden voltage and resistive burden power from entered input resistance and test current for instrument-loading review.
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Megohm Test Trend Calculator
Estimate megohm change, percent change, daily change, and drop margin from comparable readings across known days.
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Lockout Tagout Sequence Calculator
Organize entered lockout/tagout sequence records and energy-source identifiers for qualified review.
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Measurement Uncertainty Calculator
Estimate combined and relative uncertainty from three documented independent components.
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Limited Approach Boundary Calculator
Compare recorded limited-boundary distances in a review worksheet without deriving a required boundary or entry decision.
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