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Microseries

For applications requiring ultra-close, center-to-center parameters, IDI has pioneered the way toward satisfying those specifications. IDI offers the following probes for testing on or below .030 (0,76) centers:

Penta 0 - .010" (0,25) centers (.015" (0,38) with receptacle).

Quad 00 - .020" (0,51) centers with receptacle

Quad 0 - .020" (0,51) centers (.030" (0,76) with receptacle).

Tri 0 - .025" (0,64) centers (.030" (0,76) with receptacle).

The Penta 0, Quad 0, and Tri 0 are available with wire attached or may be used with the corresponding receptacle.


Wire Types
When using the any of the Microseries probes without a receptacle, it is recommended that the probe be ordered with a preattached wire. All Microseries probe assemblies use soderex magnet wire. Soderex magnet wire is a resistance wire with a desirable thin insulation (polyurethane base insulation enamel). It can be stripped by one of several methods: abrasion, chemical or heat.

The Tri 0 and Quad 0 probes have a 30 gage soderex wire preattached and the Penta 0 probe has a 36 gage soderex magnet wire. If the Microseries probes are to be used with a receptacle, the probe should be ordered without wire. The Tri 0 and Quad 0 receptacle have a 26 gage soderex magnet wire preattached and the Penta 0 has a 33 gage soderex magnet wire. Standard wire length is 36" with a 1" strip. Specialized lengths and strips are available upon request.


Fixturing
Fixturing of the Microseries probes is extremely critical to their performance. Drill hole diameter and drill hole straightness are the two most critical factors. To show the significance of accurate fixturing consider the following. An average sheet of notebook paper is approximately .003 (0,08) thick. The outside barrel diameter of the Tri 0 and the Quad 0 is .0152 (0,39), the inside diameter is approximately .012 (0,30). This makes the wall thickness .0016 (0,41) [(.0152-.012)/2]. The wall thickness is one half the thickness of a sheet of paper! Just imagine what the wall thickness of the Penta 0 must be when the outside diameter is .0075 (0,19).

See recommended fixturing options below.
 
Microseries Fixturing - Penta 0

This method features stepped holes to retain the Penta 0 probe in the fixture and a shear plate, which forces the probes to one side, providing sufficient friction to retain the probes.

Since the Penta 0 Receptacle does not have a flange on the top of the receptacle, the stepped holes are required to retain the receptacle.
   
Microseries Fixturing - Quad 00, Quad 0 & Tri 0

The Quad 0 and Tri 0 probes have a flange at the top of the barrel for a stop. The Quad 00 probe must be used with a receptacle. Its receptacle also has a flange for a stop, as well as the Quad 0 and Tri 0 Receptacle.

An optional shear plate may be used to force the probes and receptacles to one side, providing enough friction to retain the probes in the fixture.



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