Quick Start Guide
and Information
Line EMI Monitor
Meter EM100
v1.0.3 Jan. 2020 ©
All rights reserved.
You may take a reading on other power outlets by
simply un-plugging the unit from the wall, moving to
another outlet (mains) and plugging into it without
removing the opposite end from the meter.
Changing and inconsistent readings will be common.
You may also see the noise change according to the
time of day or throughout the week.
A reading below 50.0 mVp-p would be considered
low noise. Higher levels may cause interference with
sensitive equipment and may produce electro-
magnetic pollution near connected devices.
EMI filters are readily available and reduce power line
noise very effectively. They generally use passive
electronic components to attenuate conducted radio
frequencies and electromagnetic interference.
Unplug the meter when not actively measuring.
Expected noise levels and Filtering EMI
• Operating Voltage: 85-300 VAC 50/60Hz
• Average Voltage Read Accuracy: ± 1 VAC
• Line Noise Range: 0.1-1999.9 mV peak-to-peak
• Refresh rate at 4x/sec.
• Noise Read Accuracy: ±8% from 20kHz to 2MHz
(within a factor of two from 10kHz to 10MHz)
• Size: 5.2 x 3.6 x 1.6 inches; 132 x 91 x 41 mm
• Weight: 8 ounces
Specifications
0
200
400
600
800
1000
1200
1KHz
5KHz
10KHz
50KHz
100KHz
500KHz
1MHz
5MHz
10MHz
The Line EMI Meter is manufactured in the USA by
AlphaLab,Inc., Salt Lake City, UT
Questions?
Call Toll-Free (USA) 1-800-658-7030
(Or Call 1-801-487-9492)
WEEKDAYS 9am-5pm MST
We offer a one-year limited warranty from the date of
purchase under normal use and service on all
AlphaLab meters. If you have questions about the
function of your meter, please visit trifield.com/support
or email us at support@trifield.com
For information on our other products, visit www.alphalabinc.com
Warranty
This graph shows the relative frequency response.
A higher level on the graph shows higher sensitivity.
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