2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
12/1/2009
Tel: +1 520 624 6399 • Fax: +1 520 624 1906 • Web:
www.eostech.com
Page 12 of 43
1.7.3.4 Self-Sealing
Fittings
Self-sealing fittings are used for coolant lines to minimize spillage.
1.7.3.5
Over-current Protection Devices
The telescope control system incorporates various over-current protection devices, including
fuses and circuit breakers. In addition, the power supplies employed are self-protected against
over-current.
1.7.3.6
Connector Uniqueness and Pin Arrangement
Where reasonable, unique connectors are used to minimize the risk of incorrectly connecting
the instrument. Within each connector, pins are arranged to reduce the risk of damage due to
partial or an incorrect connection.
1.7.3.7
Interface to Observatory Interlock System
The telescope is be interfaced to the observatory interlock system. Activating any Emergency
Stop button in the enclosure disables power to the dome and telescope drives.
1.7.3.8 Failsafe
Design
Whenever possible, the telescope has been designed to fail in a safe manner when a fault
occurs.
1.7.4 IDENTIFIED
HAZARDS
The following hazards were identified during the conceptual design process:
1.7.4.1
Weight and Impact
The telescope is a heavy piece of equipment that could cause serious injury or death, or be
damaged if dropped or mishandled during maintenance or removal and installation of optics. If
moved quickly during handling, it will develop substantial momentum and serious injury could
result to a person or object between the telescope and an immovable object. Any collision with
the building or other equipment could result in shocks that cause damage.
1.7.4.2 Pinch
Points
Pinch points may exist in several areas within the telescope and may be unavoidable due to
constraints within the building. Crushing or shearing injuries may result if objects or body parts
are placed in these areas.
1.7.4.3 Cryogenic
Gases
If cryogenic gases are supplied to instruments on the telescope, they may present a hazard.
Since EOST is not providing any equipment or components that require cryogens, special
precautions or markings are not provided. If features requiring cryogens are implemented later,
EOST recommends a safety review to identify any necessary safety features that should be
added.
