including source code may be reproduced, transmitted, transcribed or translated into
any language or computer language in any form or by any means, electronic, magnetic,
optical, manual or otherwise, without the prior written permission of FLIR Systems.
The documentation must not, in whole or part, be copied, photocopied, reproduced,
translated or transmitted to any electronic medium or machine-readable form without
prior consent, in writing, from FLIR Systems.
Names and marks appearing on the products herein are either registered trademarks or
trademarks of FLIR Systems and/or its subsidiaries. All other trademarks, trade names or
company names referenced herein are used for identification only and are the property
of their respective owners.
1.2 Quality Assurance
The Quality Management System under which these products are developed and
manufactured has been certified in accordance with the ISO 9001 standard.
FLIR Systems is committed to a policy of continuous development; therefore, we reserve
the right to make changes and improvements on any of the products without prior
notice.
1.3 Documentation
To access the latest manuals and notifications, go to the Download tab at:
area you will also find the latest releases of manuals for our other products, as well as
manuals for our historical and obsolete products.
1.4 Disposal of Electronic Waste
As with most electronic products, this equipment must be disposed of in an
environmentally friendly way, and in accordance with existing regulations for
electronic waste.
Please contact your FLIR Systems representative for more details.
FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC
Before operating the device, you must read, understand, and follow all instructions,
dangers, warnings, cautions, and notes.
FLIR Systems reserves the right to discontinue models, parts or accessories, and other
items, or to change specifications at any time without prior notice.
Remove the batteries if the device is to be stored for an extended period.
Warning Statements
Do not operate the device if you do not have the correct knowledge. Incorrect operation
of the device can cause damage, shock, injury or death to persons.
Do not start a measuring procedure before you have set the function switch to the
correct position. Failure to do so can cause damage to the instrument and can cause
injury to persons.
Do not change to the resistance mode when measuring voltage. This can cause damage
to the instrument and can cause injury to persons.
Do not measure the current on a circuit when the voltage increases to more than 1000 V.
This can cause damage to the instrument and can cause injury to persons.
You must disconnect the test leads from the circuit under test before you change the
range. Failure to observe this warning can damage the instrument and cause bodily
injury.
Do not replace the batteries before you remove the test leads. This can cause damage to
the instrument and can cause injury to persons.
Do not use the device if the test leads and/or the device show signs of damage. Injury to
persons can occur.
Be careful performing measurements if the voltages are > 25 VAC rms or 35 VDC. There is
a risk of shock from these voltages. Injury to persons can occur.
Do not do diode, resistance or continuity tests before you have removed the power from
capacitors and other devices under test. Injury to persons can occur.
Be careful when performing voltage checks on electrical outlets. These checks are
difficult because of the uncertainty of the connection to the recessed electrical contacts.
You must not rely solely on this this device when determining if the terminals are not
Do not touch expired/damaged batteries without gloves. Injury to persons can occur.
Do not cause a short circuit of the batteries. This can cause damage to the instrument
and can cause injury to persons.
Do not put the batteries into a fire. Injury to persons can occur.
Use extreme caution when the laser pointer is on.
Do not point the beam toward anyone's eye or allow the beam to strike the eye from a
reflective surface.
Do not use the laser near explosive gases or in other potentially explosive areas.
Refer to the CAUTION statement label (shown below) for critical safety information.
FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC
Thank you for selecting the FLIR CM275 Imaging Clamp meter with IGMTM(Infrared
Guided Measurement) and Bluetooth®. The CM275 is a True RMS 600A AC/DC clamp
meter with a radiometric Lepton Thermal Imaging system, integrated VFD Mode, Inrush
Current capture, , Bluetooth®
communications capabilities, and many others as listed in the Key Features section
below. This device is shipped fully tested and calibrated and, with proper use, will
provide years of reliable service.
3.1 Key Features
6000 count digital TFT display with bargraph
Built-in Infrared Imager with gallery mode for storing, viewing, and transmitting images via
Bluetooth®
Capture fully radiometric thermal images where a temperature measurement is saved for
each display pixel
Imager features Laser pointer, cross hairs targeting, and an intuitive menu system
High power work lights built-in
Auto Range True RMS AC/DC 600 A capability
Auto Range True RMS AC/DC 1000 V capability
Frequency AC bandwidth (45-400Hz)
Frequency Measurements to 60KHz
Flex clamp adaptor input for FLIR TA72_TA74 and other clamp adaptors
Input over-voltage warning
Automatic Datalogger memory (40,000 readings over 10 sets) with selectable sample rate and
Bluetooth® transmission capability
Resistance and Continuity measurements
Capacitance and Diode measurements
Data HOLD
Inrush current
DCA zero function
Low Z (Impedance) mode
Minimum/Maximum memory
Integrated VFD mode (Low-pass filter)
Auto power off (can be disabled or preset to 1, 2, 5, or 10 minutes)
Easy-access battery cover mechanism
Optional FLIR TA04 battery charging system
Micro USB port (battery compartment) for transferring images/data logs to PC; operates
similarly to a conventional thumb drive
Safety Category Rating: CAT IV-600V, CAT III-1000V
Equipped with batteries, test leads, carry pouch, and Quick Start booklet.
FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC
1. Set the function switch to any position to switch on the meter.
2. If the battery indicator shows that the battery voltage is low, if one of the Low
Battery screens appears (Fig. 5-1), or if the meter does not power on, replace the three
See Section 12.2, Battery Replacement. If using the Model TA04
charging system, please recharge the rechargeable battery.
FIG. 5-1 Low Battery Alerts
5.2 Auto Power OFF (APO)
The meter enters sleep mode after a programmable period of inactivity, to customize
this setting please see Section 7.1.2, APO (Auto Power OFF). The default time-out is 10
minutes. The time can be set to 1, 2, 5, or 10 minutes (select OFF to disable the APO).
20 seconds prior to entering APO mode, the meter beeps; at this point, press any
button or turn the Rotary Switch to reset the APO timer.
5.3 Battery Type Selection
The user must enter the battery type (Lithium or Alkaline) in the General Settings
menu before use. This allows the meter to display battery status as accurately as
possible. Refer to Section 7.1.5, Battery Selection.
FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC
Use the Navigation Pad left/right arrows to highlight an icon. From left to right
the icons are Image Mode, Thermal Settings, Gallery (for viewing stored images and data logs), Advanced Menu, and General Settings.
Press OK to open a menu or to set an option ON or OFF. When an option is ON a
blue dot will appear next its icon. In some cases, use the navigation arrows to
select an option.
Use the Return button to exit menu levels and to return to the normal
display mode.
The mode of the meter dictates what icons are available for use.
6.2 Main Menu Options
6.2.1 Image Mode
This Image mode icon is only available in the thermal imaging mode. The Image
mode has two options:
Image + Clamp mode (default): Display will show Clamp meter data on the
thermal images while in the thermal imaging mode.
Image-only mode: Display shows thermal image data only in the thermal
imaging mode.
Press OK on the Image mode icon to open the menu and use the arrow buttons to
select the desired option.
6.2.2 Thermal Settings Menu
Press OK at the Thermal Settings icon to access the
following options: Color Palette, Emissivity, Temperature units, Laser pointer ON/OFF, and Cross hairs ON/OFF. Refer to
Section 8.3, Thermal Settings Menu (Color Palette, Emissivity,
Temperature Units, Laser Pointer, and Crosshairs) for detailed
information.
Fig. 6-2 Thermal Settings Menu
FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC
In Gallery mode, view stored images and logged readings.
Press OK at the Gallery icon. The display will show rows of stored images on
the lower area of the display and data logs on the upper area.
Use the up/down arrows to step between image and reading log areas. Use the left/right arrows to scroll through data logs or images. Press OK to open a reading log or an image. Press OK again on an image to bring up icons that will permit you to delete the
image, transmit the image via Bluetooth®, and to resize the image to full screen.
Press OK again on a data log set to bring up icons that permit you to delete the
log or to transmit the log via Bluetooth®.
Note that there is a micro USB port located in the battery compartment that
allows you to transfer data logs and images directly to your PC. When connected
to a PC, use t external
storage drive.
For More detailed information, see Section 7.1.9, Delete all Datalogger Readings,
Section 7.1.10, Delete all Stored Images, Section 8.5, Image Capture, and Section
9.7, Datalogger
6.2.4 Advanced Functions Menu
Press OK at the Advanced Functions Menu icon to access the functions listed
below. Highlight a function using the arrow buttons and then press OK to activate it.
Refer to the dedicated section for each as listed below for detailed information:
To customize the Thermal Imager, refer to Section 8.3, Thermal Settings Menu. For
basic operation, follow these steps:
1. Set the function switch to any position.
2. Press the IGM button to switch the Thermal Imager ON. Point the thermal
imaging lens (back of meter) toward an area to test.
3. The display will show the temperature in the upper left hand corner for the
targeted area.
4. In the Thermal Imaging mode, use the laser pointer and display cross hairs for
targeting. These can be switched ON or OFF in the Thermal Settings Menu.
5. In the Thermal imaging mode, the meter continues to operate normally as a
Clamp Meter. Note that in the Thermal Imaging mode, view clamp
measurements and function on the left side of the display. If desired, the
meter can be set to image-only mode in the Image Mode menu, see Section
8.4, Image Mode Menu.
6. The Distance to Spot ratio for the imager is 30:1 meaning that the
measurement spot is 30 times smaller than the distance from meter to spot
See Fig. 8-2.
7. ield of View) is 44 degrees (vertical) and 57
degrees (horizontal) see Fig. 8-3 (a) and (b).
Fig. 8-2 Distance-to-Spot ratio 30:1
FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC
Image + Clamp mode where you can view Clamp meter data superimposed on
the thermal images or:
Image-only mode where Clamp meter measurements are removed from the
thermal images
8.5 Image Capture
Short press the Display Save button to store a displayed, fully radiometric,
thermal image (or a clamp meter screen) to the Up to 100
images can be stored.
Saved thermal images are fully radiometric (each pixel includes temperature
measurement data). Note that the imager must be fully initialized (indicated by
display of IR temperature measurement instead of dashes) before radiometric data
can be captured. To view radiometric data within captured thermal images, copy the
images to a PC and view using FLIR Tools.
To view stored images:
1. Press OK to open the Main Menu
2. Press OK at the Gallery icon
3. Use the left/right arrow buttons to scroll through the images (note that the
datalogging records are located here also, on the upper display area)
4. Press OK to open a selected image
5. Press OK to open a menu permitting recycling of image, full-screen sizing,
and transmission of image via Bluetooth®
6. Use the RETURN
operating mode
button to exit screens and to return to the normal
8.6 Image Freeze (Data Hold)
In Data Hold mode, the displayed reading or thermal image is frozen. To enter/exit Data
Hold mode, press the button. In Hold mode, the indicator appears.
FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC
Caution: Before operating the device, you must read, understand, and follow all
instructions, dangers, warnings, cautions, and notes.
Caution: When the meter is not in use, the function switch should be set to the OFF
position.
Caution: When connecting the probe leads to the device under test, connect the COM
(negative) lead before connecting the positive lead. When removing the probe leads,
remove the positive lead before removing the COM (negative) lead.
9.1 Auto/Manual Range Mode
In Auto range mode, the meter automatically selects the most appropriate measurement
scale. In Manual range mode, the desired range (scale) can be adjusted by the user.
Auto range mode is the default mode of operation. When a new function is selected with
the function switch, the starting mode is Auto range and the indicator is displayed.
1. To enter Manual range mode, short press the button. To change the range,
press the button repeatedly until the desired range is displayed.
2. To return to the Auto range mode, long press the button until the Auto Range
indicator is again displayed.
9.2 Out-of-range Warning (OL)
If the input is over/under the full-scale range in Manual range mode, or if the signal has
exceeded the maximum/minimum input in Auto range mode, OL is displayed.
9.3 Data Hold
In Data Hold mode, the displayed reading or thermal image is frozen. To enter/exit Data
Hold mode, press the button. In Hold mode, the indicator is displayed.
9.4 VFD Mode (Low Pass Filter)
The VFD (variable-frequency drive) utility eliminates high-frequency noise from AC
measurements with a low-pass filter. VFD mode is available when measuring AC voltage
or AC current.
1. Press OK to access the main menu
2. Press OK at the Advanced Menu icon
3. Press OK at the VFD icon
4. The blue dot next to the icon and the VFD display icon will appear
5.De-select the VFD mode by pressing OK again. The blue dot and VFD display icon
will switch OFF when de-selected
FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC
The meter captures and displays the maximum and minimum readings, updating only
when a higher/lower value is registered.
1. Press OK to access the main menu
2. Press OK at the Advanced Menu icon
3. Press OK at the MAX-MIN icon to show Maximum and Minimum
readings.
9.6 DCA Zero Mode
The DC zero feature removes offset values and improves DC Current accuracy. Before
executing the steps below, set the clamp meter to the DC Current measurement mode
(see Section 9.8, Current and Frequency Measurements).
Note that this feature cannot correct for errors greater than 20A.
1. Press OK to access the main menu
2. Press OK at the Advanced Menu icon
3. Press OK at the icon , the display will zero and the DCA icon will appear
9.7 Datalogger
Log up to 40,000 total reading. Each time the datalogger is
started a new memory set is opened and the previous one is archived.
To start logging:
1. Press OK to access the main menu
2. Press OK at the Advanced Menu icon
3. Press OK at the icon to begin storing readings at the sample rate selected in
the General Settings menu, see Section 7.1.3, Datalogger Sample Rate. The
datalogger display icon will appear while the logger is running
To stop logging:
1. Press OK to access the main menu
2. Press OK at the Advanced Menu icon
3.Press OK at the icon
To view logs:
1. Press OK to access the Main menu
2. Press OK at the Gallery icon
3. Use the up arrow to move the cursor up to the log area of the display (the lower
area is for saved images). Scroll left/right to a set and press OK to open it.
The list of recorded measurements for the set will appear.
to stop. The datalogger display icon will switch off
FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC
In Inrush Current mode, the meter displays the AC RMS current reading in the first 100ms
period after the trigger point (current detection threshold) is reached, see Fig. 9-3 below.
For the FLEX Current function:
Current detection threshold is 0.5A for 30.00A
Current detection threshold is 5A for 300.0A
Current detection threshold is 50A for 3000A
For CLAMP Current function:
Current detection threshold is 0.5A for 60.00A
Current detection threshold is 5A for 600.0A
Inrush current mode is available when measuring AC current.
1. Press OK to access the main menu
2. Press OK at the Advanced Menu icon
3. Press OK at the Inrush Current icon , the Inrush display icon will appear
4. Connect the meter to the unpowered circuit under test
5. Set the meter to the position
6. Turn on the power to the circuit under test
7. When it reaches the threshold, the meter will display the RMS reading for the
100ms integration time.
Fig. 9-3 Inrush Current
FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC
When connected to a remote device running the FLIR Tools software suite, the CM275
(using the METERLiNK® protocol) can:
Send readings for live display on the remote device Send saved data log files to the remote device Send saved screen images (thermal and DMM) to the remote device
When connected to a remote FLIR camera that supports Bluetooth® BLE (Bluetooth®
Low Energy), the CM275 can:
Send meter readings for live display on the camera screen
Download the FLIR Tools software suite at the link below:
http://www1.flir.com/l/5392/2011-06-08/IUUE
1. Any Bluetooth® BLE device running FLIR Tools can find and connect to the CM275.
2. When successful communication between the meter and a remote device or FLIR
camera is established, the Bluetooth® icon appears on the meter display.
3. Open the main menu (by pressing OK) and use the Gallery mode to locate the
stored images and data log sets. You can transmit Images and data log sets directly
from the Gallery mode. For further information, refer to Section 6.2.3, Gallery
mode and Section 9.7, Datalogger.
4. Refer to the FLIR Tools help utility (in the software suite) for detailed information
and tutorials regarding the FLIR Tools application.
Note: The Bluetooth® utility defaults to ON but can be disabled if desired in the General Settings
menu (see Section 7, General Settings).
FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC
A non-uniformity correction (or NUC) is an image correction carried out by the camera software
to compensate for different sensitivities of detector elements and other optical and
geometrical disturbances1.
The NUC is an automatic function that takes place periodically (approximately every 2-3
minutes) or whenever the inner core of the cameral detects a ±2oC temperature change.
1. Definition from the imminent international adoption of DIN 54190-3 (Non-destructive testing Thermographic testing Part 3: Terms and
definitions).
FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC
A thermal imager generates an image based on temperature differences. In a thermal image, the
hottest item in the scene appears as white and the coldest item as black. All other items are
represented as a gray scale value between white and black. The CM275 also offers color images
to simulate hot (lighter colors) and cold (darker colors) temperatures.
It may take some time to get used to the thermal imagery. Having a basic understanding of the
differences between thermal and daylight cameras can help with getting the best performance
from the CM275.
One difference between thermal and daylight cameras has to do with where the energy comes
from to create an image. When viewing an image with an ordinary camera, there has to be some
source of visible light (something hot, such as the sun or other lighting) that reflects off the
objects in the scene to the camera. The same is true with human eyesight; the vast majority of
what people see is based on reflected light energy. On the other hand, the thermal imager
detects energy that is directly radiated from objects in the scene.
This is why hot objects such as parts on engines and exhaust pipes appear white, while the sky,
puddles of water and other cold objects appear dark (or cool). Scenes with familiar objects will
be easy to interpret with some experience.
Infrared energy is part of a complete range of radiation called the electromagnetic spectrum.
The electromagnetic spectrum includes gamma rays, X-rays, ultraviolet, visible, infrared,
microwaves (RADAR), and radio waves. The only difference is their wavelength or frequency. All
of these forms of radiation travel at the speed of light. Infrared radiation lies between the visible
and RADAR portions of the electromagnetic spectrum.
The primary source of infrared radiation is heat or thermal radiation. Any object that has a
temperature radiates in the infrared portion of the electromagnetic spectrum. Even objects that
are very cold, such as an ice cube, emit infrared. When an object is not quite hot enough to
radiate visible light, it will emit most of its energy in the infrared. For example, hot charcoal may
not give off light, but it does emit infrared radiation, which we feel as heat. The warmer the
object, the more infrared radiation it emits.
intensities of radiated energy. The infrared imager converts this energy into an image that we
can interpret.
The FLIR Infrared Training center offers training (including online training) and certification in all
aspects of thermography:http://www.infraredtraining.com/.
FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC
Wipe the housing with a damp cloth as needed. Use a high-quality lens wipe to remove
dirt or smudges from the meter lenses and display window. Please do not use abrasives
or solvents to clean the meter housing, lenses, or display window.
If the meter is not to be used for an extended period, remove the batteries and store
them separately.
12.2 Battery Replacement
The Battery symbol flashes critical level.
The meter displays readings within specifications while the low battery indicator is on.
The meter powers off before it displays an out of tolerance reading.
WARNING: To avoid electrical shock, disconnect the meter from any connected circuits,
remove the test leads from the meter terminals, and set the function switch to the OFF
position before attempting to replace the batteries.
1. Unscrew and remove the battery compartment cover.
2. Replace the three (3) standard AA batteries, observing correct polarity.
3. If using the Model TA04 rechargeable lithium polymer battery system, please
recharge the rechargeable battery.
4. Secure the battery compartment cover.
12.3 Disposal of Electronic Waste
As with most electronic products, this equipment must be disposed of in an
environmentally friendly way, and in accordance with existing regulations for electronic
waste. Please contact your FLIR Systems representative for more details.
FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC
AC conversion type: AC coupled, true RMS responding, calibrated to the RMS value of a sine wave
input. Accuracies are given for sine waves at full scale and non-sine waves below half scale.
If the meter measures a 4000-count signal and the Crest Factor of the signal is more then 3.0, the
reading may not meet specified tolerances. For non-sine waves (50/60 Hz), add the following Crest
Factor corrections:
For non-sine waves (50/60 Hz), add the following crest factor corrections:
600.0 V
1000 V
60.00 V
600.0 V
1000 V
Range, resolution, and accuracy specifications for Low Impedance
(Lo Z) measurements are the same as DCV, ACV, and VFD
specifications shown above
AC reading is <10 counts
± (1.0% + 5 dgt) 600.0V
± (1.0% + 5 dgt)
45~400 Hz
± (1% + 5 dgt) 45~65 Hz
± (5% + 5 dgt) 65~400 Hz
For a crest factor of 1.0 2.0, add 3.0% to the accuracy.
For a crest factor of 2.0 2.5, add 5.0% to the accuracy.
For a crest factor of 2.5 3.0, add 7.0% to the accuracy.
FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC
AC Conversion Type and additional accuracy is same as AC Voltage.
DCA affected by the temperature and residual magnetism; use DCA Zero function to compensate.
If the meter measures a 4000-count signal and the Crest Factor of the signal is more then 3.0, the
reading may not meet specified tolerances. For non-sine waves (50/60 Hz), add the following Crest
Factor corrections:
For non-sine waves (50/60 Hz), add the following crest factor corrections:
For a crest factor of 1.0 2.0, add 3.0% to the accuracy.
For a crest factor of 2.0 2.5, add 5.0% to the accuracy.
For a crest factor of 2.5 3.0, add 7.0% to the accuracy.
Table 13.3 Frequency (ACA and ACV)
Accuracy
Frequency
± (0.1% + 2 dgt)
Notes:
Overload protection: 1000V (rms) and 600 A (rms)
Trigger Sensitivity:
ACV function:
> 6V (rms) at 60.00V range for 10Hz ~ 1kHz
> 60V (rms) at 600.0V range for 10Hz ~ 1kHz
> 600V (rms) at 1000V range for 10Hz ~ 1kHz
Hz function at ACV rotary switch:
> 6V (rms) for 10Hz ~ 10kHz
> 30V (rms) for 10kHz ~ 60kHz
FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC