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Vaisala Thunderstorm Electric Field Mill EFM550
Overview
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. EFM550 data can be displayed using optional Vaisala ALARM Automated Lightning Alert Risk Management Software to show current electric field measurements numerically and graphically.
The EFM550 integrates with local-area, real-time lightning information systems:
- Vaisala Thunderstorm Lightning Warning System TWX300
- Vaisala Thunderstorm Sensor TSS928 with Vaisala ALARM Automated Lightning Alert
Technical Specifications
| Operational Specifications | |
| Accuracy | +/- 5% of reading offset +/- 50 v/m |
| Response Time | 1 Sec |
| Signal Interface | RS-232 (8 bit binary, 1200 baud) |
| 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. | |
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