On both the CD / CM clamp and the CD stethoscope there is an arrow that indicates which way the clamp or stethoscope is facing in relation to the transmitter. If the arrow is pointing away from the transmitter when the CD reset is performed the locator display shows 000 and the bar graph reads 100%. If the arrow is pointing towards the transmitter, the locator display shows 111 and there is no bar graph reading.

When using either of these accessories it is important to reset the CD at a known point, near the transmitter, before making any identification measurements.