4-44 Manual # 42-02-2223
Final Adjustment
Car/Counterweight Safety Test
This is a two-part test. Car safety testing verifies operation of the car safeties. The objective of
the test is to set the safeties, causing the hoist motor to break traction. The over-speed must be
sufficient in magnitude to cause the governor to trip mechanically and to set the car safeties.
The electrical governor switch must not prevent the cars continued acceleration to the mechan-
ical trip speed and the safety-operated switch (plank switch) must not open the safety string. To
perform the Car Safety test:
1. Place a full load in the car.
2. Position the car some distance away from the bottom landing (about 10-feet per 100-
feet-per-minute of contract speed).
3. On the iView, Configuration > Pattern > Modes tab, verify that Deceleration and
Approach deceleration are set no higher than 2ft/s
2
to avoid tripping the drive.
4. Place a jumper between the #3 bus and the GOV terminal on the iBox to bypass tripping
the governor overspeed.
5. Place a jumper between SAFH and SAFC on the iBox to bypass the safety plank (SOS).
6. On the View > Safety Tests > Test Configuration, enter a speed sufficient to trip the
mechanical governor (trip speed from the governor name plate plus 5 to 10%).
7. Calculate the overspeed as a percentage of Contract speed and set up the AC drive for an
“Overspeed” test (see “Running a Test” on page 4-43).
• .
8. On the iView > Controller > View > Safety Tests tab, select the Car/Counterweight
Safety Test and click Select. Complete on-screen instructions.
9. Place a car call distant enough to allow the car to reach the necessary speed. If neces-
sary, you may end the test and bring the car to an emergency stop using the iBox Stop
switch.
10. Remove jumpers placed for the test in steps 4 and 5 above.
11. Check the hoistway ropes to make sure they are still in their proper grooves before
attempting to move the car.
12. Use whatever method is required to reset the safeties. For flexible quick-clamp safeties,
move the car on Inspection (UP and ENABLE buttons) to release the safety and restore
the safety string.
Counterweight Safety Test - The counterweight safety test verifies operation of the counter-
weight safeties. For this test, position the empty car near the bottom landing and arrange to
over-speed in the up direction. The test is comparable to the car safety test but performed in the
opposite direction. If the counterweight has a governor, remember to jumper it out. Also,
remember to remove jumpers when tests are complete.
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 (Controller > View > Setup > Safety > Configuration tab). Set a test
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