OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 25
12. Apply 75 in-lb of torque.
13. Run for 2 hours, stopping every 30 minutes to redistribute the grinding
compound on the surface of the block.
14. Stop the motor and observe the block. The block should show a shiny
wear pattern covering more than 50% of the surface. If it does not, return
to step 8.
The EP Lubricity Tester is considered to be in calibration when a reading of
34 ± 2 is obtained in deionized water at a speed of 60 rpm with 150 in-lb of
force applied for 5 minutes.
1. Thoroughly clean the ring, block, and block holder with acetone.
2. Submerge the ring and block in a cup of new deionized water.
3. Set the speed to 60 rpm
4. Zero the torque and timer.
5. Apply 150 in-lb of force for ve minutes.
6. Wait for the reading to stabilize.
7. After the rst run, the reading is usually low. Repeat steps 1 through 6 a
total of three times.
8. If the reading is not 34 ± 2 after three runs in deionized water, then
additional grinding of the block and ring will be required. Repeat until the
instrument reads within the proper range.
a. If the reading is below 32: Use coarse compound for one hour at 100
rpm and 90 in-lb. Redistribute the grinding compound every 15 to 30
minutes.
b. If the reading is above 38: Use ne compound for one hour at 100
rpm and 75 in-lb. Redistribute the grinding compound every 15 to 30
minutes.
Calibration
Calibration Check
To Next Page
Loading...