AlphaLab TriField EM100 User manual

Safety and Warnings
WARNING - Exercise care when plugging and
unplugging these power cords. They carry potentially
lethal voltages. Never touch or use this equipment in
or around water or in conditions where water has
condensed on or around the equipment or any of its
test leads (AC power cord). Do not use this equipment
if the test leads (AC power cord) are damaged.
WARNING - There are no user serviceable parts in
this equipment. Opening the back cover will expose
potentially lethal voltages. Refer all repairs and
concerns to the manufacturer, AlphaLab, Inc., or
authorized representative.
WARNING - Use only UL approved, 2-conductor, 18
AWG, NEMA 1-15P to IEC 320-C7, 120 or 250 VAC
power cord. Do not use other power cords. Never
remove the ground pin from a 3-conductor cord as
replacement for approved 2-conductor cord!
WARNING - Using this meter in a manner not
specified by the manufacturer or outside the
environmental limits may impair the safety protection
provided by the equipment.
This meter is safe under the following limits:
• Indoor use ONLY
• Temperatures from 5° to 40° Celcius
• Humidity 0-80% up to 31° C decreasing linearly to
50% at 40° C
• Main Power Supply (Wall outlet or mains)
110-240VAC, line fluctuations not to exceed ±10%
The Line EMI Meter by AlphaLab, Inc. measures
electromagnetic interference (EMI) in single-phase,
110-240 VAC 50/60Hz power lines. It plugs into a
wall outlet or mains socket and requires no battery
or additional external power source.
This meter measures the total line noise present on
the power outlet (differential noise between hot and
neutral) into which the unit is plugged. This noise is
displayed as a peak-to-peak value in millivolts
(RMS x 2.82). A yellow signal-strength bar also
displays the EMI noise and a speaker plays the
sound of the noise.
Hold the meter firmly in one hand and plug the
smaller, female end (IEC-320-C7) of the supplied
cord into the base of the meter.
The range is 0.1 mV to 1999.9 mV peak-to-peak in
frequencies from 10 kHz to 10 MHz. 50Hz and 60Hz
power frequencies are ignored. Only noise
frequencies above 10kHz and below 10 MHz are
measured.
Description
Setup
Setup Continued
Reading the Color LCD Display:
Average AC
Voltage
Yellow
Signal-Strength Bar
Noise Level in p-p millivolts (RMS x 2.82)
10kHz - 10MHz
The supplied power/test cord is reversible and may
be plugged into the wall in either direction. Plug the
larger, male end (NEMA 1-15P) of this cord into the
wall outlet or mains. An adapter plug may be needed
outside of the United States.
The speaker sound will build to its
correct level over a three-second
period to avoid a power spike. The
meter will now automatically display
the noise on that power line.

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 [email protected]
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.