3M CTM048 User manual

User’s Guide
3M™EM Eye Meter CTM048
Handheld ESD Event Detector

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Table of Contents
Section Page
Safety Information ................................................................................................3
Overall Features ....................................................................................................4
User Features.........................................................................................................4
Package Contents ..................................................................................................5
Precautions............................................................................................................5
Attaching the Sensor Heads..................................................................................6
Attaching the Antenna...........................................................................................6
Power Supply and Charger....................................................................................6
Connecting the Sensor Head.................................................................................7
Parts Description...................................................................................................8
Modular Assembly ................................................................................................9
Reset Button........................................................................................................10
ESD Event Detection Sensor ..............................................................................11
EM Field/Power Density/EIRP Sensor ...............................................................12
RF Signal Detection Sensor ...............................................................................12
ESD Events Sensor Display and Controls ..........................................................13
RF Signal Sensor Display and Controls..............................................................15
Common Display and Controls...........................................................................16
ESD Events Display and Controls ......................................................................18
Electromagnetic Field Sensor and EIRP Display and Controls ..........................21
RF Signal Sensor Display and Controls..............................................................25
Access Data using a PC ......................................................................................27
Calibration...........................................................................................................28
Specifications ......................................................................................................28
Regulatory Information.......................................................................................30
Warranty..............................................................................................................32

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Safety Information
Please read, understand, and follow all safety information contained in this
User’s Guide prior to use of the 3M™EM Eye Meter CTM048. Retain these
instructions for future reference.
Explanation of Signal Word Consequences
WARNING Indicates a potentially hazardous situation, which, if not avoided, could
result in death or serious injury and/or property damage.
CAUTION Indicates a potentially hazardous situation, which, if not avoided, may
result in minor or moderate injury and/or property damage.
To reduce the risks associated with hazardous voltage, which if not avoided, could result in death or
serious injury:
• Never allow children or other non-qualified persons to come in contact with battery charger;
• Never use battery charger outdoors or in other wet locations;
• Always use extreme caution to avoid coming into contact with any exposed electrical conductors of
the equipment being measured with the 3M™EM Eye Meter CTM048.
To reduce the risks associated with hazardous voltage or possible fire or explosion related to internal
Li-ion battery, which if not avoided, could result in death or serious injury:
• Use only the battery charger provided with the product;
• If the battery charger is missing or damaged, only replace with one supplied by 3M.
To reduce the risks associated with electrostatic discharge (ESD) voltage, which if not avoided, could
result in damage to the meter:
• To install or change antennas, turn off the meter, install or change antennas, turn meter back on;
• Avoid touching antenna when meter is turned on
WARNING
To reduce the risks associated with environmental contamination from the EM Eye Meter CTM048 with
the lithium battery and power supply:
• At the end of service life, dispose of the EM Eye Meter CTM048 accordance with federal, state and
local requirements.
CAUTION

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Overall Features
The 3M™EM Eye Meter CTM048 is capable of providing measurements for
many various parameters, which are determined by the type of sensor connected
to the EM Eye Meter CTM048. Below are the three sensors that are available
now:
• ESD Events Detection – The portable, easy-to-use EM Eye Meter CTM048
serves as a measuring instrument for most ESD signals. The EM Eye Meter
CTM048 measures the magnitude of ESD events. This meter also provides
filters to estimate the events magnitude for CDM, HDM and MM models.
• Electromagnetic Field Measurement – Enables the EM Eye Meter
CTM048 to be transformed into an EMF Meter, Power Density Meter and
EIRP Meter.
• RF Signal Sensor – The EM Eye Meter CTM048 measures the amplitude of
an RF signal.
User Features
Modular Construction
The EM Eye Meter CTM048 with the modular construction
concept can expand to different applications. With the
current design, it measures the magnitude of most ESD
events when in one of its filter modes, electromagnetic fields
(EMF), power density, effective isotropically radiated power
and radio frequency (RF).
Touch Screen to Power ON
The EM Eye Meter CTM048 is designed with a modern user
interface. All buttons and controls are within the display
itself. With its display and touch screen, it is easier for users
to quickly navigate through the features that were built into
the meter.
Speaker and Headphone Alarm Outputs
The EM Eye Meter CTM048, with a speaker and
headphones, allows flexible means for audible indications,
beeping or “warbling” like a radio. If one is in a noisy place,
a headphone jack for optional headphones can be used for
clearer audio.

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Easy Data Logging to Memory Card
The 3M™EM Eye Meter CTM048 supports data logging by
using a microSD™card and exports to an Excel spreadsheet.
Having data at hand enables quick analysis. Solutions can
be decided quickly and can be measured on the spot.
Package Contents
Please confirm that the following accessories are included in your EM Eye
Meter CTM048 package when you open it:
• Base EM Eye Meter module
• One or more of the following sensors heads:
• ESD event sensor with antenna
• Electromagnetic field sensor with antenna
• RF signal sensor (includes RF cable and 20 dB attenuator)
• Power supply adapter
• Optional accessories may be ordered separately:
• Remote antenna CTC113
Precautions
• Do not drop the meter. This may damage the device and will void the
warranty.
• Do not discharge directly into the antenna metals as it may damage the
input sensors and will void the warranty.
• Be cautious in the placement of antenna and the module heads; align the
parts while assembling.
• Do not use sharp objects to touch the screen.
• Do not use a wrench or pliers to screw or unscrew the antenna. Use your
bare hands.
• Do not remove the microSD™card while the power is on. Turn off the meter
before removing the microSD™card.
• Do not remove the sensor heads while the power is on. Turn off the meter
before removing and replacing the heads.

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Attaching the Sensor Heads
Please keep in mind the following when using the modular sensor heads.
BEFORE CONNECTING TO AN INPUT SOURCE, TOUCH THE OUTSIDE
SURFACE OF THE 3M™EM EYE METER CTM048 INPUT CONNECTOR.
THIS WILL HELP PREVENT ESD SHOCK TO THE METER.
1. The power must be turned off when changing the sensor heads.
2. Make sure to gently plug or unplug EM Eye Meter CTM048 and the sensor
heads.
3. Plug or unplug the sensor heads by firmly gripping them. Then fit the sensor
over the EM Eye unit. Do not grab the antenna for plugging and unplugging
the sensor heads.
4. If the antenna is separated from the sensor head, reattach it when the sensor
head is securely in place.
Attaching the Antenna
In order to avoid damaging the EM EYE METER CTM048, installation and
replacement of the antenna must be done with great care. An excessive amount
of force or improper installation may permanently damage the meter.
Attach the antenna to the input connector by simply screwing it in by hand.
DO NOT OVERTIGHTEN THE CONNECTION. Screw in the antenna firmly
but gently. Do not use any tools other than your hand to attach and detach the
antenna.
Power Supply and Charger
Use only the power supply that comes with the EM Eye Meter CTM048. Do not
use any other power supply as it may damage the meter.
Battery Care – Charging for the first time
To improve the battery life we recommend that you make three fully charge-
discharge cycles. For example: fully charge the meter for two hours or overnight,
then use the meter until it is fully discharged (do not recharge it at half-charge-
life). Repeat this step two times. It would normally take two hours to fully charge
the battery, but since the meter power is on while charging; it would extend the
charge time to four hours. Succeeding charging would be at any duration. Use
only the supplied charger.
Power On
Using your finger, press and hold any spot on the screen for approximately
three seconds – do not use any tools to perform this action. If a new sensor
was installed, a sequence of initialization will take place for the first time

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for approximately ten seconds. After that, the switch-on action will take
approximately three seconds. The main display screen appears after the
initialization and a beep will sound. The EM Eye Meter CTM048 will then
perform a battery check. If the battery is too low to provide reliable operation,
it will not turn on. The screen will go white momentarily and then the meter
will power up. After the initial power up, the meter will go directly to the main
screen.
Connecting the Sensor Head
Antenna CTS001 Antenna CTS001 (External cable sources)
ESD Event ModuleElectromagnetic Field
Module RF Signal Module
Base 3M™EM Eye
Meter CTM048 Module Base EM Eye Meter Module Base EM Eye Meter Module
Memory Card
(microSD™card) (microSD™card) (microSD™card)
Memory Card
Memory Card
Power Supply/Charger
*Not included: Australian power plug
Power Supply/Charger
*Not included: Australian power plug
Power Supply/Charger
*Not included: Australian power plug
3M™Remote Antenna
CTC113
*Not included: order separately
3M™ Remote Antenna
CTC113
*Not included: order separately
RF Cable BNC connector
20db Attenuator
* Included with the purchase of the
CTC029 model. Otherwise needs to
be ordered separately.

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Parts Description for the 3M™EM Eye Meter CTM048
Local directional antenna
SMA connector (M/F)
Connector (M/F)
Reset pinhole
Sensor module
Speaker
Storage microSD™card
Alignment pin
Headphone jack
Alignment hole
Power adapter jack
Main body
Touch screen and display

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Modular Assembly and Disassembly
Carefully insert the sensor head and antenna to avoid damaging the 3M™ EM
Eye Meter CTM048.
1. Position the sensor head so that the dowel pins align
with the holes.
2. With the initial head midway through, reposition it so
that it is parallel to the body.
3. Press the sensor head firmly against the body until
both surfaces are flat with each other.
4. Insert and screw in the antenna making sure that it’s
not too tight or too loose. Do not use any tools other
than your hand.
Note: Antenna is not applicable for the RF Signal Sensor.

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If the assembly isn’t done correctly, you may receive one of the following error
and warning messages. To correct, follow the instructions as indicated within the
message.
Error Message Reason for Error
ERROR: Sensor is disconnected. Click here to
turn device off.
The meter is turned on without the sensor
module.
ERROR: Card was removed. Data may be lost
and card could be damaged. Click here to
close the window.
The storage card (microSD™) is removed
while the meter is powered on.
ERROR: Card was removed. Data may be lost
and card could be damaged. Click here to
close the window.
The meter is turned on with no storage card
in place.
ERROR: Card was removed. Data may be lost
and card could be damaged. Click here to
close the window.
A new card is inserted or when a card is
empty.
ERROR: Card was removed. Data may be
lost and card could be damaged. Click here to
close the window.
Inserting a card that has contents other than
the 3M™EM Eye Meter CTM048 files.
ERROR: Invalid memory card. Format or
replace it. Click here to close the window.
The card is not formatted to FAT32. Format-
ting is done using the PC.
ERROR!!! STACK OVERFLOWED Click here to
turn device off.
This is a fatal error. If it appears even after
resetting, please contact 3M.
Reset Button
If the 3M™EM Eye Meter CTM048 locks up or the
display freezes, press the reset button to restart the
meter. The reset button is in a small hole found near
the power supply jack. Use a paper clip to push the
button inside the small hole.

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ESD Event Detection Sensor
The 3M™EM Eye Meter CTM048 will help you detect most ESD events. This
will help you make sound decisions in tackling what may have been a daunting
task. The EM Eye Meter CTM048 detects the magnitude of events and using
the filters built into the unit. It can provide approximate values for some ESD
Events for models (CDM, MM, HBM) using proprietary algorithms. Switching
between any of the modes will give you immediate data analysis. Solving ESD
problems requires data; a before-and-after analysis of data may now be measured
and used to tailor ESD control programs.
CDM Mode MM Mode HBM Mode Raw Input Mode
In IC testing, ICs
that are sliding
through tubes may
be charged up. Once
the lead touches the
metal tracks, a CDM
event can occur.
A moving, un-
grounded cart may
accumulate charges
in its path. As it ap-
proaches a metallic
worktable and bumps
into it, a discharge
may occur and may
adversely affect
nearby products or
instruments.
In IC testing, opera-
tors that are handling
an IC (i.e. fixing
bent leads) may be
discharging through
the IC.
For engineers who
want to simply ana-
lyze raw ESD signals
for further analysis,
the Raw Input mode
provides actual volt-
ages received by an
antenna.
In feeder bowls
where the ICs are ar-
ranged for sorting or
orientation, voltages
may be induced by
the vibrating bowl.
In using a bad solder-
ing iron, induced
voltages may cause
discharges to the
components mounted
into the PCB. Use
grounded tools and
confirm that no
ESD events will be
detected by using the
MM mode.
During picking up
of an IC by a person
not properly wearing
a wrist strap, use
the EM Eye Meter to
alarm the operator of
such events.

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EM Field/Power Density/EIRP Sensor
The 3M™EM Eye Meter CTM048 is a handy tool for the detection and analysis
of some electromagnetic fields.
EM Field Sensor
This sensor provides several important functions:
• For the EMC engineer, it helps with diagnostics of electromagnetic emission
from the product and for troubleshooting a problem.
• For the manufacturing engineer, it assists in identifying sources of harmful
electromagnetic interference in production that causes equipment lock-up,
sensitive component damage and other problems.
• For those who install and maintain antennae of radio transmitters and mobile
phones, the EM Eye Meter CTM048 can provide readings of the field strength,
including peak and average values. Further, proprietary algorithm allows the
EM Eye Meter CTM048 to measure EIRP of some emission sources.
• For those who are concerned with EMI and RF safety, the EM Eye Meter
CTM048 provides measurements of power density.
RF Signal Detection Tool
The EM Eye Meter CTM048 is a handy tool for the RF communications design
engineer. Used in the laboratory, this tool measures signals from RF emitting
devices.

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ESD Events Sensor – Display and Controls
For the detection of most ESD events using CDM, MM or HBM models.
Settings and Displays
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(denotes a touch screen feature)
POWER C
Press the “Power C” button to:
1) Clear or reset the screen data (momentarily
press)
2) Turn the meter OFF (long press for 4 seconds)
MENU F
Press the “Menu F” button to:
1) Adjust brightness
2) Adjust auto-OFF-time
3) Select antenna options
NAVIGATOR
Press the arrow buttons to:
1) Increase or decrease value settings
2) Move fields or cursor around the setup screen
3) Return to the main screen by pressing the
center arrow
HOLD
Press the “Hold” button to:
1) Freeze the display (the “Hold” symbol appears)
2) Freeze maximum values (press twice for the
“Max” symbol to appear)
DATA STORAGE
Press to read the data from the memory card
TRUE-ESD
TRUE-ESD mode, toggle to enable ESD FILTER
mode
ALL-SIGNAL
ALL-SIGNAL mode, toggle to enable ALL SIGNAL
mode
BATTERY
Battery level display
TIME
Displays time, press to setup
ESD MODE Press to set calculations for CDM, MM or HBM
models. Also sets the distance to the ESD target
COUNTER Counter display for ESD events detected
THRESHOLD BAR Displays relative amplitude level of detected ESD
events. Green means the ESD event is below set
threshold, Red means the ESD event is above
threshold. Press this button to adjust the ESD
event threshold voltage
AUDIO Selectable audio mode
Tone (bell), speaker/volume and mute
VOLTAGE
DISPLAY
Displays the estimated voltage readout of the
ESD event or other signals as detected through
the antenna

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EM Field Sensor – Display and Controls
Settings and Displays (denotes a touch screen feature)
POWER C
Press the “Power C” button to:
1) Clear or reset the screen data (momentarily press)
2) Turn the meter OFF (long press for 4 seconds)
MENU F
Momentary press
adjusts time interval
for data recording
1) INTERVAL recording
2) AVERAGE value
Long press
1) Adjust brightness
2) Adjust OFF-time
3) Select AF
NAVIGATOR
Press the arrow buttons to:
1) Increase or decrease value settings
2) Move fields or cursor around the setup screen
3) Return to the main screen by pressing the
center arrow
HOLD
Press the “Hold” button to:
1) Freeze the display (the “Hold” symbol appears)
2) Freeze maximum values (press twice for the
“Max” symbol to appear)
DATA STORAGE
Press to read the data from the memory card
RECORD DATA Press record area to start data writing onto the
microSD™
storage card
UNIT Press “UNIT” button to change units between
dBµV/m or V/m
BATTERY
Battery level display
TIME
Displays time, press to setup
MODE OPTION
The triangle at the upper right side of display
switches modes sequentially as follows:
EM Field Power Density EIRP EM Field
When pressed at the “Hardware” setup menu, any
of the mode options maybe disabled or enabled
THRESHOLD BAR Displays relative amplitude level of EMF
detected. Green means EMF is below set
reference, Red means EMF is above reference.
Press it to adjust the EMF references
AUDIO Selectable audio mode: Tone (bell), speaker/
volume, mute
PEAK Displays the peak readout of EMF, Power Density
and EIRP
AVG Displays the average readout of EMF, Power
Density and EIRP
REF Displays the reference level setting, either memory
or current references. (EMF and Power Density only)

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RF Signal Sensor – Display and Controls
Settings and Displays (denotes a touch screen feature)
POWER C
Press the “Power C” button to:
1) Turn the meter ON (press the screen for three
seconds)
2) Turn the meter OFF (press for three seconds)
MENU F
Momentary press
adjusts time interval
for data recording
1) INTERVAL recording
2) AVERAGE value
Long press
1) Adjust brightness
2) Adjust OFF-time
3) Select AF
NAVIGATOR
Press the arrow buttons to:
1) Increase or decrease value settings
2) Move fields or cursor around the setup screen
3) Return to the main screen by pressing the
center arrow
HOLD
Press the “Hold” button to:
1) Freeze the display (the “Hold” symbol appears)
2) Freeze maximum values (press twice for the
“Max” symbol to appear)
DATA STORAGE
Press to read the data from the memory card
RECORD DATA Press “Record” button to start data writing onto
the microSD™storage card
UNIT Press “UNIT” button to change units between
dBµV/m, dBm and mV
BATTERY
Battery level display
TIME
Displays time, press to setup
THRESHOLD BAR Displays amplitude level of RF signal detected.
Green means RF signal is below reference, Red
means RF signal is above reference. Press it to
adjust the RF signal references.
AUDIO Selectable audio mode
Tone (bell), speaker/volume and mute
PEAK Displays the peak readout of RF signal.
AVG Displays the average readout of RF signal.
REF Displays the reference level setting, either
memory or current references.

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Common Display and Controls
POWER and CLEAR
HOLD and MAX
TIME
TIME
The POWER C button turns off the
3M™EM Eye Meter CTM048 or
clears the values that are on display.
To turn off the meter, press and
hold the POWER C button for
approximately four seconds or
longer until the meter goes off.
To reset all of the values on the
display, press the POWER C button
for approximately one second.
The HOLD button toggles the HOLD data and MAX data
sequentially.
HOLD freezes the current data on the display. The instrument
will not be active at this point.
MAX displays the maximum voltages detected by the EM Eye
Meter above the set threshold.
Pressing the HOLD button for the third time will disable the
HOLD and MAX function and returns to normal run mode.
HOLD and MAX does not affect recording into memory storage.
Data is still being recorded even if HOLD and MAX is active.
To set the time, press the time display.
The NAVIGATOR screen appears.
Press the left or right arrows to move the shaded area that
need to be changed.
Press the up or down button to scroll and set the numbers.
Press the center button to return to the main screen.
Time: AM/PM format or 24-hour format
Date: Format as MM/DD/YY
Mode: 12-hour, 24-hour format

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BATTERY
AUDIO INDICATORS
The BATTERY symbol is not a touch feature. It displays the approximate level of
battery life remaining for use.
Full charge life.
Half charge
<1 hour charge, charging is required
Battery is discharged, charging is required
Charging in progress
The AUDIO INDICATOR button scrolls through the following audio modes:
1) Tone (bell)
2) Speaker at low volume
3) Speaker at middle volume
4) Speaker at loud volume
5) Mute
The BELL audio mode sends an audible beep for every ESD event count detected.
The SPEAKER, on the other hand, produces the “crackling” or “humming”
amplitudede-modulated sounds of ESD event or EMF. This may provide a better
feel of what discharges or EMF sounds like. The MUTE disables the audio and the
unit operates in silent mode.

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ESD Events Display and Controls
MENU FUNCTION
ANTENNA TYPES
Local Antenna
CTS001 is a directional antenna that comes as a default
with the set. Use this antenna for general purposes.
3M™Remote Antenna
CTC113-6FT – general use omnidirectional antenna,
ambient temp, black plastic with screw mounting.
ESD EVENT MAGNITUDE and COUNTER
Press the MENU F icon and the NAVIGATOR icon appears.
Press the up/down arrows to scroll through functions.
Press the left or right arrows to set values and options.
Press the center button to return to the main screen.
Serial Number
The serial number is a five-digit number indicated at the top left
section of the screen.
Brightness
10% to 100%, with 10% increments.
Auto Off Time
Disabled or adjustable between 1 to 9 minutes.
Antenna
1) Local antenna; 2) Remote antenna.
The VOLTAGE display is not a touch feature. This displays the estimated voltage detected
at the antenna which corresponds to a filter selected at the ESD MODE button.
The COUNTER is not a touch feature, but it displays the number of ESD events that had
occurred above the threshold level setting.
The maximum event count it can register is up to 32,767. The counter restarts to zero
after the maximum count.

19
ESD FILTER MODELS*
*Not all ESD events are captured by
the 3M™ EM Eye Meter CTM048. The
magnitude of the event can be measured.
CDM, HBM and MM Model results are
estimated based on proprietary algorithms.
ESD THRESHOLD
“TRUE-ESD FILTER” and “ALL-SIGNAL”
The ESD MODE button enables the user to choose between
RAW INPUT and calculations of HBM, MM and CDM.
At the NAVIGATOR button:
Press the up/down arrows to set the distance.
Press the left or right arrows to set ESD event models.
Press the center button to return to main screen.
Effective distance range
0.5” (1.3 cm) to 15.0” (38.1 cm)
Filter
1. Human Body Model (HBM)
2. Machine Model (MM)
3. Charge Device Model (CDM)
4. Raw input
The THRESHOLD, in a form of an ARC LED bar, displays the
detection level of the ESD events detected. When pressed, the
threshold level may be adjusted.
With the NAVIGATOR bar:
Press the left or right arrows to set the ESD event threshold
voltage. Press the center button to return to the main screen.
Threshold Levels
0 - 10 Volts at 1V increments
10 - 990 Volts at 10V increments
1 - 999mV for RAW input
After pressing the lightning bolt symbol or the TRUE-
ESD-FILTER button, the triangle button appears on the
display. In this mode, the 3M™EM Eye Meter CTM048
will detect most signals, including ESD and some EMI
signals.
After pressing the triangle or the ALL-SIGNAL button,
the lightning bolt symbols appears on the display. In
this mode, the EM Eye Meter CTM048 will detect ESD
events that are mostly CDM in nature. Not all events
are captured and the information provided is based on
proprietary algorithm which models and approximates
for the event type.

20
DATA STORAGE and READ
MEMORY STORAGE CARD
The DATA STORAGE button displays the data stored in the
microSD™card found at the bottom of the 3M™EM Eye
Meter CTM048.
Scroll through the recorded data using the NAVIGATOR
button.
The displayed information is as follows:
(ESD mode) (Threshold) (Distance) (CDM on/off) (Date) (Voltage
sensed) (Time) (Data bar indicator)
Data from the microSD card can be exported using the utility
software described in the following section.
Memory storage card
The EM Eye Meter CTM048 works with microSD™Cards.
Some cards may not be compatible. Non-compatibility is indicated by an “X” mark
overlaid on the card button display. For other memory card types, please contact 3M for
verification.