Separate optical and contact readings
Identify the model and mark the speeds you need checked in each mode. Note whether the unit reads an optical target or is used with a contact adaptor. A removable tip, cone or wheel can be missing from a stores inventory even though it belongs with the instrument.
Include the wheel for surface speed
For a linear-speed function, give the wheel identification and its marked diameter or circumference. Record the units selected on the display. Flag a worn wheel or loose tip when requesting the quotation so its condition can be reviewed.
Checking a stroboscope’s flash rate
A stroboscope set to 3,000 flashes per minute is set to 50 flashes per second, or 50 Hz. Copy the unit shown on the instrument along with the rates your procedure uses. Identify whether the instrument sets the rate internally or follows an external trigger. For a triggered check, include the input type and any multiplier or divider used.
A calibration request can ask how often the lamp actually flashes. Inferring shaft speed from a stationary-looking pattern is a different observation. Several identical blades, or a flash rate related to the rotation by a whole-number ratio, can produce a similar image. If shaft speed also needs verification, identify the machine and target in a separate request.
Scheduling around a machine-speed check
Give the date of the next scheduled maintenance round when booking a shared tachometer. Confirm which accessories should travel, and retain a list of the contact tips and wheels in the case. Include the return contact so the complete kit reaches the team using it.
Slip speed meters
For a slip speed meter, identify how the instrument obtains rotor speed and its electrical reference. State whether the reported result is speed difference, percentage slip or another indicated value. Keep pole count and reference-frequency settings with the recorded operating point. A check of one speed input does not automatically verify the calculated slip result, so include both the input requirements and the displayed quantity for technical review.
Remote speed indicators
A speed indicator fitted to a panel may receive pulses from a separate pickup rather than observe rotation directly. List the pickup, pulse-per-revolution setting, displayed units and any gearbox factor. State whether the enquiry is for the indicator input, the sensor or the complete chain. RTS can agree the arrangement needed for those results while retaining the same asset identity used on the machine's maintenance sheet.