ETS-Lindgren 2187 Turntable - Manual (Page 7)

Introduction | 7
1.0 Introduction
The ETS-Lindgren Model 2187 Turntable is an electric-powered turntable
platform system designed for use with the Model 2090 Multi-Device Controller (or
next generation ETS-Lindgren controller, if applicable) for EMI compliance
testing. The Model 2187 is available in 2.03-meter and 3.03-meter sizes, both
designed for indoor or outdoor use.
The top of the turntable is conductive with a continuous ground brush to
electrically couple it to the ground plane. The ground brushes are attached
directly to the chamber floor by the floor flange, and are in continuous contact
with the turntable top. The brushes point downward from the floor flange.
Both models utilize a pinion and gear drive with a gear reducer and electric motor
located beneath the platform. The bearing on which the turntable rotates has the
drive teeth cut directly on the outside and will easily support most Equipment
Under Test (EUT). Support for the turntable includes casters that aid in the
support of cantilevered loads on the outside of the turntable.
The turntable top is sectional to provide easy access if service is required. On
standard models, a 15-cm hole is provided in the center of the turntable to
accommodate customer supplied cabling to and from the EUT.
To prevent over-travel of the turntable in either direction of movement, hard limits
are provided in the form of pins that actuate switches located below the tabletop.
These pins allow limits to be set and allow as much as two full rotations. Rotation
speed can be varied from a controller (not included) or through the IEEE-488
interface bus.
Standard Configuration
T URNTABLE A SSEMBLY
Featuring continuous or non-continuous operation, the turntable assembly
includes:
• 230 VAC electric motor unit
• Convenient rotational limit adjust switches
• Ground ring assembly with ground brush and floor flange
• 10-meter fiber optic cable
Additionally, the turntable is infrared compatible, and can be used with an
optional ETS-Lindgren Infrared Remote Controller (IR remote). For more
information on using an IR remote, see Infrared Remote Controller on page 8.