Instron 1000KPX-J3D, Руководство по эксплуатации

Страница: 49 / 70

49
Mount fixtures
Product Support: www.instron.com
Loss of power
If at any time main power is lost to the frame (due to the disconnect switch being turned off,
Emergency Stop
being engaged, power loss at the customer power supply, or complete power loss to
facility), gravity will cause the frame to go to its natural resting state, i.e. the rod will extend from the
hydraulic cylinder. To impede this process, the system is equipped with a servo blocker valve that closes
at loss of system power and prohibits oil leakage from the hydraulic cylinder. However, it can not stop
100% of oil leakage and thus the hydraulic cylinder will drift very slowly. Drift is slow enough that a
noticeable amount of drift may be seen if system power remains off over an extended period (i.e. several
days). Even with this very slow drift rate, multiple pinching hazards may exist on the frame (depending on
accessories mounted in the test space) and personal injury is still possible. Also, any equipment in the
test space may be damaged. If possible, remove any specimens from the frame.
Warning
Caution
On loss of power, any equipment in the test space may be damaged, particularly
extensometers. It is always good practice to keep equipment that is not currently in use out
of the test space.
Caution
On loss of power, when the servo blocker valve closes, the hydraulic cylinder will drift
upward approximately 2 mm (0.08 in). Any instrument in the load train that is sensitive to a
tensile load may be damaged (i.e. extensometers, low range load cells, etc.).
On loss of power, immediately remove hands and arms from the frame to avoid personal
injury.