If you measure a motor at 30°C and get 50 MΩ, but the base rating is 100 MΩ at 20°C, the insulation may still be acceptable after correction. Always follow your local electrical code.
The manual gives you numbers; this section gives you meaning. protmex pt6708 manual
To begin a measurement, turn on the device. The large LCD will display current decibel levels and a high-speed analog bar graph that updates every 40 milliseconds to show varying noise trends. If you measure a motor at 30°C and