With the thermometer on and probe plugged in, place the "ring" over an inked part of a garment (or scrap piece of material) with the cross-hairs wires down. Be sure the wires are actually touching the ink. Allow the garment and probe to be fed into the dryer along the conveyor belt. The temperature displayed by the thermometer reflects the rise in temperature of the ink as it moves through the dryer. When the temperature begins to quickly decline, the probe should now have exited the dryer. Unplug the probe and allow only the lead wire to follow the probe through the dryer. DO NOT ALLOW THE THERMOMETER TO GO THROUGH THE DRYER and DO NOT PULL RING BACK as this could damage the delicate cross-hair wires.