DeFelsko PosiTector SPG v.1.1 Full Manual - Manual (Page 7)

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To disconnect a probe from a body, power-down the
Gage and slide the plastic probe connector horizontally
(in the direction of the arrow) away from the body.
Reverse these steps to attach a new probe.
When powered-up, the PosiTector automatically
determines which probe is attached and does a
self-check.
Probes Probes
Additionally, the PosiTector accepts a number of probe types
including magnetic, eddy current and ultrasonic coating thickness,
surface profile, environmental and ultrasonic wall thickness
probes. Perform the latest software Updates (pg. 27) to ensure
probe compatibility with your Gage. For the latest information on
probe interchangeability see www.defelsko.com/probes
The supplied probe tip has a 60° angle to comply with most test
standards including ASTM D 4417 B. An optional 30° angle tip
with replacement tool is available for special applications or to
comply with Australian Standard AS 3894.5.
A replacement tool is included with the purchase of either the 60°
or 30° angle tips. Insert the two legs of the replacement tool into
the probe tip and turn counter clockwise to remove the tip. Insert
the new tip and tighten clockwise. Do not over tighten. Since the
factory zero setting may not always be precise after a probe tip
exchange, the gage should be checked on the included glass
plate and zeroed if necessary.