ANSI ESTA E1.42 pdf free download

ANSI ESTA E1.42 pdf free download.Entertainment Technology- Design, Installation, and Use of Orchestra Pit Lifts.
3.3.4 Control station’: A device for operating an orchestra pit lift and displaying information to the operator.
3.3.5 Contactor: As used in this standard, the term contactor includes both electro-mechanical and solid state devices used to make or break the current in one or more devices.
3.3.6 Dead load: The weight of the lift platform structure, flooring, skirts and permanently installed equipment.
3.3.7 Encoder: That sensor which provides position information to the control system derived from linear or rotation motion of the lift drive train or actuators.
3.3.7 E-stop (Emergency stop)’: A function of the control system wherein the orchestra pit lift is brought to a complete stop in as rapid a manner as possible and brought to an inherently safe state at the conclusion of the stop where all sources of power or energy are removed and isolated from the actuators.
3.3.8 E-Stop station: An E-Stop Station is a station that contains only an E-stop button.
3.3.9 Enable station: A station that contains a control that a person must hold-to-operate to permit motion initiated from a control station.
3.3.10 Fault’: An action or condition characterized by inability to perform a required function.
3.3.11 Guarded access portal: An access way with monitored barriers to restrict personnel from access into lift enclosure. Physical barriers may consist of doors, hatches, panels or demountable barriers.
3.3.12 InitIal Limit (Sensor)*: That sensor whose function is to stop the lift in the event of over-travel beyond the highest or lowest target. In the event of a contactor-based control system, this may be the same sensor as the upper and lower positioning sensor.
3.3.13 Jogging (Inching): The quickly repeated closure of the circuit to start a motor from rest for small movements of the orchestra pit lift.
3.3.14 Labeled’: Equipment or materials to which has been attached a label, symbol or other identifying mark of an organization that is acceptable to the Authority having jurisdiction and concerned with product evaluation, that maintains periodic inspection of production of labeled equipment or materials, and by whose labeling the manufacturer indicates compliance with appropriate standards or performance in a specified manner.
3.3.15 Lift enclosure’: The lift hoistway plus all the areas bounded by physical barriers.
3.3.16 Lift hoistway’: The vertical space containing the orchestra pit lift, extending from the machinery pit floor to the highest point of lift platform travel.
3.3.17 Lift platform: The horizontal structure of orchestra pit lift intended for supporting user applied loads.
3.3.18 Lifting load*: The maximum live load intended for the user to add to the lift platform to be moved at the rated speed.
3.3.19 Listed*: Equipment, materials or services included in a list published by an organization that is acceptable to the authority having jurisdiction and concerned with evaluation of products or services, that maintains periodic inspection of production of listed equipment or materials or periodic evaluation of services, and whose listing states that either the equipment, material or service meets appropriate designated standards or has been tested and found suitable for a specified purpose.
ANSI ESTA E1.42 pdf download.