Ephesus Test Report
For
Characterizing Electromagnetic Radiation & Conduction
On The
Altus 80W and 120W Luminaires
Date of Test: March 5, 2013
Equipment List:
Description
Agilent Spectrum Analyzer
Texas Instr Antenna Demo Kit
Loop of Wire for Low Frequency
Antenna
Tektronix Current Probe
Chroma Digital Power Meter
Chroma AC Power Source
Chroma AC Power Source
Model Number
E4407B
169 MHz #14
15 feet of wire looped
around 2” diameter reel
TCP202
66202
61602
61602
Serial Number
Calibration Date
C061442
662020007977
616020002115
ABP000000077
01/28/2013
01/28/2013
02/01/2013
Tests Performed:
All EMC tests were performed in the Ephesus office, not in a qualified EMC test laboratory.
These tests were intended to locate possible interference issues between the Altus luminaires
and cow tag RFID systems. Before any unit under test (UUT) EMC measurements were taken,
the office EMC environment was baselined. Any differences noticed when the UUT was
powered was considered due to the UUT. Two Ephesus luminaires, the 80 watt and 120 watt
versions of the Altus, were placed 3 feet above the floor on a non-conductive table. The lights
were powered by two AC Power Sources at 120VAC and 277VAC while the radiated and
conducted EMI characteristics were measured at each input voltage. During the radiated EMI
testing, the receive antennas were located 3 meters from the UUT. For conducted EMI testing,
the current was measured with a 20 MHz current probe and the frequency spectrum was
recorded by the spectrum analyzer. The cow tag RFID systems operate at 134.2kHz, so the
frequency range analyzed for each type of EMI measurement was 9kHz to 250kHz.
Test Setup:
Test setup for Radiated EMC tests
Pictures of Light and Test Equipment Used:
Ephesus Altus Luminaire (80 Watt & 120
Watt versions were used)
Agilent E4407B Spectrum Analyzer with
Texas Instruments Antenna Kit #14
Chroma 61602 AC Power Sources
Chroma 66202 Digital Power Meter
Test Results:
Test Results Summary
During the radiated EMI testing, when the luminaires were powered there was no sign of EMI
radiation within the frequency range of interest for cow tag RFID systems. This lack of EMI
radiation was proven with two different antennas. During the conducted EMI testing, when the
luminaires were powered some EMI energy was noticed, but none of the measured energy was
near the frequency for cow tag RFID. The conducted EMI energy characteristics of the
luminaires were verified at both 120VAC and 277VAC input voltages.
Proof of Test Results:
Radiated EMI Measurement Results
Cow Tag System
Operating Frequency
Baseline Radiated EMI of office environment. Measured with TI Antenna #14 from 9kHz to 250kHz.
Cow Tag System
Operating Frequency
Radiated EMI of 80W Altus powered at 277VAC. Measured with TI Antenna #14 from 9kHz to 250kHz.
Cow Tag System
Operating Frequency
Radiated EMI of 120W Altus powered at 277VAC. Measured with TI Antenna #14 from 9kHz to 250kHz.
Cow Tag System
Operating Frequency
Baseline Radiated EMI of office environment. Measured with Wire Loop Antenna from 9kHz to 250kHz.
Cow Tag System
Operating Frequency
Radiated EMI of 120W Altus powered at 277VAC. Measured with Wire Loop Antenna from 9kHz to 250kHz.
Conducted EMI Measurement Results
Cow Tag System
Operating Frequency
Baseline Conducted EMI of office environment. Measured with current probe from 9kHz to 250kHz.
Cow Tag System
Operating Frequency
Conducted EMI of 80W Altus powered at 120VAC. Measured with current probe from 9kHz to 250kHz.
Cow Tag System
Operating Frequency
Conducted EMI of 80W Altus powered at 277VAC. Measured with current probe from 9kHz to 250kHz.
Cow Tag System
Operating Frequency
Conducted EMI of 120W Altus powered at 120VAC. Measured with current probe from 9kHz to 250kHz.
Cow Tag System
Operating Frequency
Conducted EMI of 120W Altus powered at 277VAC. Measured with current probe from 9kHz to 250kHz.
Conclusion:
The conducted and radiated EMI measurements performed have verified that the Ephesus 80W
and 120W Altus luminaires do not produce any EMI energy at, or near the frequency of RF
animal identification systems. Based on these findings, Ephesus Lighting is confident that the
Altus luminaires provide an ideal lighting solution that will not cause any interference issues with
134.2 kHz cow tag RFID systems.