Overall vibration
Capture
Machine geometry
Spectrum
Peaks and tags
Trend
One capture tells you where the machine is. A row of captures at the same point tells you where it is going, which is the only version of this that lets you schedule instead of react.
Severity
Waterfall
Airborne channel
The motion sensor stops at about 30 Hz, which is well below where bearing defects live. Envelope analysis gets there another way: band-pass the high frequency region where a defect impact rings, rectify it, low-pass the result, and the repetition rate of the impacts appears at the bottom of the envelope spectrum, right where BPFO and BPFI sit.
Flash rate
Controls
Finding the true speed
A frozen image at rate f may also freeze at f/2, f/3 and every other integer division, so the first still image you find is often a submultiple. Work down: halve the rate. If the pattern stays frozen and single, keep halving. The true speed is the highest rate at which exactly one image appears. Two or three evenly spaced images mean the rate is a multiple of the true speed.
Readings
Camera tachometer
A strobe tells you the truth only if you know the harmonic rule. This does not care. Put a strip of reflective tape on the shaft, point the camera at it, and the brightness of a small patch of the frame rises once per revolution. Count the rate and the speed is unambiguous.
Illuminance
Camera
Point the lens at the surface you are lighting, from the surface, facing the fixture. The phone camera has no cosine corrector and no photopic filter, so treat this as a relative meter that becomes useful once calibrated against a known reading.
Calibration and target
Flicker
Flicker is read from rolling shutter banding: the sensor scans rows over time, so a modulating source prints stripes across the frame. Frequency is only absolute once the row readout rate is known, which is what the calibration step measures using a plain mains-driven lamp as the reference.
Colour quality
Correlated colour temperature is estimated with McCamy's cubic on the camera's own sRGB response, and Duv tells you how far off the blackbody locus the source sits. This is a hint, not a spectrometer reading: white balance is forced off where the browser allows it, but any residual camera processing lands directly in this number. Hand the swatch to Colorimeter when you want to build a palette from it.
Survey points
Room grid
One reading at the bench tells you almost nothing about a room. A grid tells you uniformity, which is what people actually feel: the average can be perfect while the corner you work in is half of it.
Sound level
Exposure
Calibrating the microphone
A phone microphone is not a class 2 meter. It compresses, it rolls off below about 100 Hz, and it clips well under the levels a shop can produce. Set the offset by standing next to a real sound level meter, or an acoustic calibrator if you have one, and adding the difference here. Without that step every number on this station is relative, and the honest use of it is comparing today against last Tuesday rather than declaring compliance.
Session history
Octave bands
Dose tells you how much. It does not tell you what frequency it was, and that is the number you need to choose hearing protection. A muff rated for 25 dB may give you eight in the band that is actually hurting you.
Hearing protection, long method
Enter the attenuation your protector claims in each band, from its data sheet. The estimate applies the usual seven decibel safety adjustment to the A-weighted result.