ETS-Lindgren 2175 User Manual
Model 2175 MiniMast™
User Manual
ETS-Lindgren L.P. reserves the right to make changes to any products herein to improve
functioning or design. Although the information in this document has been carefully reviewed and
is believed to be reliable, ETS-Lindgren does not assume any liability arising out of the
application or use of any product or circuit described herein; nor does it convey any license under
its patent rights nor the rights of others. All trademarks are the property of their respective
owners.
© Copyright 2005–2008 by ETS-Lindgren L.P. All Rights Reserved. No part of this
document may be copied by any means without written permission from ETS-Lindgren
L.P.
Trademarks used in this document: The ETS-Lindgren logo and MiniMast are trademarks of
ETS-Lindgren L.P.
Revision Record | Model 2175 MiniMast, MANUAL | Part #399770, Rev. C
Revision Description Date
A
B
C
Initial Release April, 2005
Updates November, 2005
Design updates; rebrand September, 2008
ii |
Table of Contents
Notes, Cautions, and Warnings ......................................................................... v
1.0 Introduction ................................................................................................... 7
Standard Configuration ............................................................................................................. 8
Optional Items ........................................................................................................................... 9
ETS-Lindgren Product Information Bulletin .............................................................................. 9
2.0 Maintenance ................................................................................................ 11
Maintenance Recommendations ............................................................................................ 11
Routine Check .................................................................................................................. 11
Six-Month Check .............................................................................................................. 12
Replacement and Optional Parts ............................................................................................ 12
Service Procedures ................................................................................................................. 12
3.0 Specifications .............................................................................................. 13
Electrical Specifications .......................................................................................................... 13
Physical Specifications ............................................................................................................ 13
4.0 Assembly and Installation .......................................................................... 15
Product Assembly ................................................................................................................... 16
Electrical Installation ............................................................................................................... 23
Connecting the Controller ....................................................................................................... 24
Carrier Safety Brake ................................................................................................................ 25
5.0 Operation ..................................................................................................... 27
Editing the Controller Configuration Parameters .................................................................... 27
MiniMast Encoder Calibration ................................................................................................. 27
Antenna Mounting Instructions ............................................................................................... 28
Pre-Operational Checks .......................................................................................................... 30
Start-Up and Safe Shutdown .................................................................................................. 30
Infrared (IR) Controller ............................................................................................................ 30
Appendix A: Warranty ...................................................................................... 33
Appendix B: Drawings ...................................................................................... 35
Appendix C: EC Declaration of Conformity .................................................... 37
| iii
This page intentionally left blank.
iv |
Notes, Cautions, and Warnings
Note: Denotes helpful information intended to provide tips for
better use of the product.
Caution: Denotes a hazard. Failure to follow instructions
could result in minor personal injury and/or property
damage. Included text gives proper procedures.
Warning: Denotes a hazard. Failure to follow instructions
could result in SEVERE personal injury and/or property
damage. Included text gives proper procedures.
See the ETS-Lindgren Product Information Bulletin for safety,
regulatory, and other product marking information.
| v
This page intentionally left blank.
vi |
1.0 Introduction
The ETS-Lindgren Model 2175 MiniMast™ is a portable, electric-powered mast
and platform system designed to be used with the Model 2090 Multi-Device
Controller (or next generation ETS-Lindgren controller, if applicable) for EMI
compliance testing. The MiniMast is designed for antenna scanning from 1 meter
to 4 meters. The mast, carrier, platform, lifting rope, and guying system are
non-conductive and non-magnetic. The mast section is constructed of square
fiberglass tubing for strength, rigidity, and “weatherability”.
The MiniMast may also be manufactured in custom mast heights. Contact your
local sales representative for additional information regarding custom height.
The MiniMast features an offset boom that maintains a constant rotational axis
along the centerline when the antenna is rotated from horizontal to vertical
polarization. A cable guide at the back end of the boom feeds the coaxial cable to
the antenna while maintaining the appropriate bending radius.
The air polarization feature allows for remote polarization of the antenna using
the controller or the infrared remote control.
For antennas with a stinger mount, the offset boom can be removed. The
antenna stinger is then clamped into the mounting block using the hand knob.
Introduction | 7
The antenna carrier is raised and lowered by a fractional horsepower, electric,
variable speed motor. A worm-type gearbox driven by the motor provides the
adequate torque needed to raise and lower the carrier and prevents the carri er
from back-driving the motor. The motor and associated electronics are contained
in a shielded enclosure mounted beneath the platform of the unit. Under
command of the controller, the motor typically positions the carrier within
one centimeter of the desired location. To prevent over travel of the carrier in
either direction of movement, the mast system has integral fiber optic limits. Soft
limits may be set within the travel range provided by the mechanical limits using
the controller.
The motor base is connected to the controller through a twin fiber optic cable
assembly. This fiber optic cable transmits both directional control and position
information. Power to the motor base is provided locally to the motor through a
detachable, grounded power cable.
A carrier brake is mounted on the carrier assembly. In the event that the carrier is
released from the rope suspension, a spring-loaded cam locks the brake into
position against the mast and locks the carrier so that further vertical movement
is restricted.
The carrier brake is intended to provide some protection to the
carrier and the antenna; it is not a fail-safe brake for protection
to personnel. Personnel operating this equipment should be
instructed to stay clear of the carrier and boom at all times
whether or not the carrier is moving.
Polypropylene braided rope guy lines are provided for installations requiring the
mast to be guyed and must be firmly anchored for vertical stability. Use of the
guy lines is recommended in all applications to provide maximum stability.
Standard Configuration
• Motor, 220 VAC, nominal
• Input frequency 50 or 60 Hz
• Tower platform casters for movement of the unit
• Offset antenna mount
• Stinger antenna mount
• 10-meter fiber optic control cable for inside chamber
8 | Introduction
• 3-meter fiber optic control cable for connection to Model 2090 controller (or
next generation ETS-Lindgren controller, if applicable) outside chamber
• Two ST-to-ST bulkhead feedthroughs provide a means to penetrate a shield
wall and maintain the integrity of the shielded enclosure
• Air polarization (adjustable speed)
• Infrared (IR) Remote
Optional Items
• Model 2090 Multi-Device Controller (or next generation ETS-Lindgren
controller, if applicable): This controller provides control for two separate
devices (for example, towers and turntables) in any combination, plus the
control of four auxiliary devices through a fiber optic interface. The unit
includes a GPIB connection and is compatible with most popular EMI
measurement software.
• Universal Antenna Mount: This option is a versatile and sturdy mount for
most common antennas.
• Additional Fiber Optic Cable: Various lengths of fiber optic cable are
available by custom order.
ETS-Lindgren Product Information Bulletin
See the ETS-Lindgren Product Information Bulletin included with your shipment
for the following:
• Warranty information
• Safety, regulatory, and other product marking information
• Steps to receive your shipment
• Steps to return a component for service
• ETS Lindgren calibration service
• ETS Lindgren contact information
Introduction | 9
This page intentionally left blank.
10 | Introduction
2.0 Maintenance
Maintenance of the Model 2175 MiniMast™ is limited to external components
such as cables or connectors. If you have any questions concerning
maintenance, contact ETS-Lindgren Customer Service.
Maintenance Recommendations
Regular maintenance will prolong the service of your mast assembly. If excessive
wear or damage is found during any of the recommended checks, the system
must be taken out of service and repaired before proceeding. Pneumatic tubing
that appears to be brittle and worn from the effects of UV radiation and inclement
weather should be replaced. Lubricant may be purchased from ETS-Lindgren;
contact the Sales Department at +1-512-531-6400 and request item #890437.
Before performing any maintenance, follow the safety
information in the ETS-Lindgren Product Information Bulletin
included with your shipment. Warranty may be void if
maintenance is performed incorrectly.
Before performing any maintenance, disconnect the unit and
turn off power.
ROUTINE CHECK
• Prior to beginning normal operation of the mast, check the mast and
lift system for any signs of damage or excessive wear.
• Checks the lift rope for excessive wear.
• Check the mast and carrier for any signs of damage or excessive
wear.
• Check the guy line(s) to ensure safe and secure and check for
excessive wear.
• Verify the height readout of the controller and the physical position of
the mast are the same.
• Verify the antenna is secure.
• Check routing of all cables to make sure they do not interfere with
the operation of the mast.
Maintenance | 11
SIX-MONTH CHECK
• Check the lift rope and guy line for signs of wear.
• Inspect the components and tubing of the pneumatic polarization
mechanism for signs of corrosion, excessive moisture, and wear.
• Lubricate the air cylinder O-rings to prevent excessive wear.
• Check all cabling to the motor base for frayed and worn insulation.
Replacement and Optional Parts
See the drawings located in the back pocket of this manual for the part numbers
to order replacement or optional parts for the MiniMast.
Service Procedures
For the steps to return a system or system component to ETS-Lindgren for
service, see the Product Information Bulletin included with your shipment.
12 | Maintenance
3.0 Specifications
Electrical Specifications
Nominal AC Voltage
Input Frequency
Current Rating
Phase
Physical Specifications
Base Dimensions
Weight
Overall Height
Mast Height
Scan Range
Required Air Pressure
220 VAC
50/60 Hz
10 Amp service
Single
0.90 m x 0.90 m
2.95 ft x 2.95 ft
81.2 kg (179.0 lb)
4.61 m (15.1 ft)
Nominal 4.5 meters
4 meters standard
Custom height may be specified upon
placement of order
60-80 psi (410-550 kPa)
Carrier Load Rating
Maximum Loading
Not to exceed 18 kg (40 ft lb)
10 kg (22 lb)
See Operation on page 27 for additional
information
Specifications | 13
Loading...