Ironwood Electronics SG-MLF User Manual User Manual

Page 6

Rev A, JC, 5/12/03 Rev. C, JG, 5/25/07

Tel: (800) 404-0204 • (651) 452-8100

Fax: (651) 452-8400

PO Box 21151 • St. Paul, MN 55121 • USA

www.ironwoodelectronics.com

tape is rolled loosely around a fingertip, with the adhesive side out, and overlapped to adhere to
itself. Remove socket from the board. With the tape positioned around the fingertip, roll the tape
over the surface of the elastomer. The tape will not adhere to the elastomer, even if some force is
applied, however, the tape will adhere to the elastomer guide. After cleaning the first side, remove
the elastomer guide and clean the opposite side with a fresh piece of tape. The exposed side of the
elastomer can be cleaned without removing it from the socket base assembly.

Elastomer, elastomer guide and IC guide are assembled using silicone adhesive and are press fit to
the dowel pins on the socket base. Elastomer orientation in the elastomer guide is critical. Socket
will not function properly if the elastomer orientation is wrong (See figure 7 for proper
orientation).

Caution: the elastomer will absorb liquids and may become deformed if it absorbs too much. Do
not apply liquids directly to the elastomer or submerse the elastomer in liquid.

For a more thorough cleaning, use the stiff nylon brush and a solution of half DI water and half
isopropyl alcohol. Wet the brush, scrub the surfaces of the elastomer, and blow both sides dry with
clean dry shop air. After allowing it to fully dry, clean the surfaces with the rolled tape method to
remove any dust or lint accidentally deposited in the drying process. Only perform the thorough
cleaning with the elastomer removed from the elastomer guide.

Elastomer specifications:

Operating Temperature

Continuous usage:

-35C to +85C

Compression set: 150C for 22hrs

Thickness change: -4.5%

Vibration

Standard:

MIL-STD202, METHOD 204, CONDITION A

No change in resistance and thickness

Humidity

Standard:

MIL-STD202, METHOD 106

Resistance change: 26 m

Ω

Thickness change: -1%

Thermal shock

Standard:

MIL-STD202, METHOD 107, CONDITION A

Resistance change: -19 m

Ω

Thickness change: -1%

Temperature cycling

Standard:

MIL-STD202, METHOD 103, CONDITION A

Resistance change: 15 m

Ω

Thickness change: -6%

Mechanical Specifications:

Conductive elastomer life: 1700 cycles.

Electrical Specifications

0.5mm Thick

Contact resistance:

50m

Ω

Insulation resistance:

1000M

Ω