How should you take a reading using a contact handheld tachometer?

Using a contact handheld tachometer involves ensuring that the device can accurately measure the rotational speed of a surface. The correct method requires placing the adapter snugly against the rotating surface. This direct contact allows the tachometer to accurately capture the rotation speed, as the device measures the rate of rotation through the friction or force applied by the adapter against the surface.

Proper contact ensures a secure connection, reducing the chance of interference or inaccurate readings that could occur if the device were simply held at a distance or if the surface wasn't adequately engaged. This technique maximizes the effectiveness of the tachometer by ensuring that it gets a precise and reliable reading of the rotational speed.