OfiTE 112-00 - EP Test Procedure; EP Test Setup and Operation

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 13
EP Test
Before the test can be accurately run, the machine must be in proper
adjustment. To test for proper adjustment, or to run a standard test, proceed
through the following steps. Refer to page 7 for instructions on using the
control panel.
The EP test measures the lm strength of the liquid in two ways.
1. A Pass determines the amount of load or pressure the lubricant will hold
without a breakdown of lm strength.
2. A seizure represents the point where a complete breakdown of the uid
occurs resulting in a metal to metal contact as indicated by tearing or
galling of the metal surface on the block.
Procedure
1. Clean the EP test ring (#111-06-01 with a raised narrow surface) and the
EP test block (#111-04-01 cube with smooth surface) with acetone and
rinse them thoroughly with deionized water. All parts of the machine in the
sample area must be clean before starting a test.
Do not touch metal contact areas with bare hands.
Removing the ring from the main shaft can change the alignment of the
contact area with the block. We recommend removing the ring only to
replace it or to switch between lubricity and extreme pressure tests.
2. Stabilize the main shaft by inserting the shaft lock plunger into the hole in
the shaft.
3. Place the EP Test Ring squarely onto the tapered portion of the shaft.
Using a " wrench, secure the test ring retainer nut. Make sure the ring
seats squarely on the taper of the shaft.
4. Remove the shaft lock plunger from the hole in the shaft.
5. Turn the power on. Let the unit run for 15 minutes.
6. Press the scroll wheel twice to stop rotation. Place the EP Test Block in
the block holder.
7. Set the motor speed to 1,000 rpm. Check to make sure the block does
NOT fall out of the holder.
8. Zero the torque reading on the display (see page 7 for instructions).
9. Run the machine at 1,000 rpm for approximately 3 minutes, or until the
torque zero reading appears to stabilize and no longer drifts appreciably.
Zero the torque reading.