The ORF-1 fixtures center o-rings between two pins under the indenter of the durometer, therefor it becomes necessary to use an operating stand.
1. To center the gauge remove the standard specimen holder from the base of your operating stand and insert the set plug included with the ORF-1.
2. Loosen the column lock lever and position the foot of the gauge so that the foot of the gauge slides into the counterbore of the set plug. With the foot inside the set plug, re-tighten the column lock lever when the foot has just made contact with the bottom of the counterbore. The stand is now set with the proper alignment and height for the o-ring fixtures.
3. Select the proper size fixture for the cross section of the o-ring that will be tested. When placed in the proper fixture, the cross section will fit snuggly between the pins. Place the fixture in the base of the stand, then place the o-ring in the fixture, making sure it is fully seated. When the durometer is lowered onto the specimen it will indicate the durometer reading.