Vaisala EFM550 Technical data
Vaisala Thunderstorm
Electric Field Mill EFM550
www.vaisala.com
Vaisala Thunderstorm Electric Field Mill EFM550 integrates with Vaisala local-area,
real-time lightning systems to monitor the development and dissipation of overhead
lightning threats by measuring the local atmospheric electric field.
Features and Benefits
Advance warning of overhead
▪
lightning threat
High-resolution lightning
▪
threat data
Exceptional reliability and low
▪
maintenance
Minimizes false alarms
▪
No preventative maintenance
▪
required during the first two
years of operation
Flexible siting and easy
▪
installation
Advance warning of
overhead lightning threat
The EFM550 integrates with these
local-area, real-time lightning
information systems:
• Vaisala Thunderstorm Lightning
Warning System TWX300
• Vaisala Thunderstorm Sensor
TSS928™ with Vaisala ALARM
Automated Lightning Alert Risk
Management software
The EFM550 provides for exible
and convenient operation. Digital
output supports on-site system and
function tests. The EFM550 allows
for correction adjustment of electriceld enhancement. Hardware for roof
mount is included.
EFM550 data can be displayed using
optional Vaisala ALARM Automated
Lightning Alert Risk Management
Software to show current electric
field measurements numerically and
graphically
Adding EFM550 to these systems
provides advance warning of
overhead lightning threats and then
identies when the threat has passed
to operations especially vulnerable to
lightning, such as:
• Aircraft refueling and ramp safety
• Aerospace operations
• Munitions and blasting operations
• Ordnance facilities
• Explosives handling and storage
• Hazardous material handling
• Oil storage and reneries
• Chemical processing
Technical data
24 in.
(61 cm)
9 in.
(22.9 cm)
Minimum 6 in. (15.2 cm)
clearance to mounting surface
Operational Specifications
Accuracy +/- 5% of reading
offset +/- 50 v/m
Response Time 1 Sec
Signal Interface 8-bit binary digital signal RS-485
(RS-422 compatible); full duplex
Sampling Fixed 2/sec message rate
Range +/- 10 kV/m, max.
Environmental Conditions
Operating/Storage Temperature Range -10 °F to +115 °F
(-23 °C to +46 °C)
Humidity 0% to 100%
Mechanical
Motor Brushless; 25,000 hours MTBF
Cable 4-twisted pair, 24 AWG min.
Electrical
Voltage 100-240 VAC, 50-60 Hz; or 20-30 VDC
Power Protection Multi-stage transient protection
Power Consumption 2.3 watts
Mounting
Hardware included for convenient mounting to a vertical pipe or
flat mounting surface.
Minimum 6.0 in.(15.2 cm) clearance from bottom of junction box
to mounting surface.
Maintain a minimum of 18.0 in.(45.7 cm) area clear between mill
head and mounting surface.
Support Services AND Standard Warranty
Training, technical support, spare parts and service agreements
are available for maintaining optimal sensor performance. Vaisala
warrants all products manufactured by Vaisala to be free from
defects in workmanship or material for one year from the date
of delivery. Contact your Vaisala Sales Representative for specific
support services and product warranty details.
For more information, visit
www.vaisala.com or contact
us at sales@vaisala.com
Ref. B210372EN-E ©Vaisala 2010
This material is subject to copyright protection, with all
copyrights retained by Vaisala and its individual partners. All
rights reserved. Any logos and/or product names are trademarks
of Vaisala or its individual partners. The reproduction, transfer,
distribution or storage of information contained in this brochure
in any form without the prior written consent of Vaisala is strictly
prohibited. All specifications — technical included — are subject
to change without notice.
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