Electrical Governor Test; Car/Counterweight Buffer Test - MCi iControl User Manual

Final Adjustment

Electrical Governor Test

This test verifies that the calibration of the electrical governor switch is appropriate (typically
about 110% of contract speed) and that the car will execute an emergency stop once the electri-
cal governor switch is activated. When the car trips the electrical governor switch in the down
direction, it will execute an emergency stop.
1. Bring the car to the middle of the hoistway.
2. Check your mechanical governor nameplate for its tripping speed. Check the Contract
Overspeed setting on the Configuration > Safety tab. Set a test speed sufficient to trigger
the Contract Overspeed but not high enough to trip the mechanical governor.
3. Select the Electrical Governor test. Complete on-screen instructions.
4. Place a car call that will allow the car to reach the necessary speed.

Car/Counterweight Buffer Test

This is a two-part test. The car buffer test verifies that the car striking the buffer will cause the
hoist motor to break traction and that the car buffer will automatically return to its fully-
extended state after having been fully compressed. The car is arranged to run into the terminal
landing without initiating any form of slowdown. Neither the final limit switch nor the buffer
switch must stop the car.
1. Be certain that the pit is prepared, buffers ready, etc.
2. Place a full load in the car.
3. Position the car in the hoistway high enough to reach contract speed before reaching the
bottom landing.
4. Place a jumper between the #3 bus and the SAFH terminal on the iBox to bypass the
safety string.
5. Set Test speed to Contract Speed.
6. Select the Car/Counterweight Buffer test. Follow on-screen instructions.
7. Use the Inspection switches to run the car. If necessary, you may end the test and bring
the car to an emergency stop using the iBox Stop switch.
The car must strike the buffer, compress it fully, and cause the hoist motor to break traction.
8. Check the hoistway ropes to make sure they are still in their proper grooves before
attempting to move the car.
9. Lift the car off the buffer at inspection speed. (Normally accomplished after the inspec-
tor enters the pit to observe.) The buffer must return to full extension.
Counterweight Buffer Test - The counterweight buffer test verifies that the counterweight
striking the buffer will cause the hoist motor to break traction and that the counterweight buffer
will automatically return to its fully-extended state after having been fully compressed. The
empty car is positioned near the bottom landing and arranged to reach contract speed in the up
direction. The test is comparable to the car buffer test but performed in the opposite direction.
If the counterweight has a governor, remember to jumper it out.
Note
These tests may cause the load weigher to go out of calibration.
Values" on page
4-46 Manual # 42-02-2222
4-33.
Please refer to "Learning Load