FLIR Systems CM275-NIST User manual

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

2

Table of Contents

1. ADVISORIES 5

1.1 Copyright 5

1.2 Quality Assurance 5

1.3 Documentation 5

1.4 Disposal of Electronic Waste 5

2. SAFETY 6

3. INTRODUCTION 8

3.1 Key Features 8

4. METER DESCRIPTION 9

4.1 Front and Back Meter Descriptions 9

4.2 Function Switch Positions 10

4.3 Function Buttons and Selector/Navigation Pad 10

4.3.1 MODE Button Sequence of Operations 11

4.3.2 Navigation Pad/OK Button 11

4.4 Status Bar Display Icons 11

4.5 Other Display Icons 12

5. METER POWER 13

5.1 Powering the Meter 13

5.2 Auto Power OFF (APO) 13

5.3 Battery Type Selection 13

6. MENU SYSTEM 14

6.1 Using the Menu System 14

6.2 Main Menu Options 14

6.2.1 Image Mode 14

6.2.2 Thermal Settings Menu 14

6.2.3 Gallery Mode 15

6.2.4 Advanced Functions Menu 15

6.2.5 General Settings Menu 15

7. GENERAL SETTINGS 16

7.1 General Settings Navigation 16

7.1.1 Diode SMART/CLASSIC 16

7.1.2 APO (Auto Power OFF) 16

7.1.3 Datalogger Sample Rate 16

7.1.4 Real-time Clock 16

7.1.5 Battery Selection 17

7.1.6 Bluetooth® ON/OFF 17

7.1.7 Button-press tone ON/OFF 17

7.1.8 Language selection 17

FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

3

7.1.9 Delete all Datalogger readings 17

7.1.10 Delete all Stored Images 17

7.1.11 View HELP Screen 17

7.1.12 Viewing meter component information 17

8. THERMAL IMAGING 18

8.1 Thermal Imager Basics 18

8.2 Thermal Imager Operation 19

8.3 Thermal Settings Menu (Color Palette, Emissivity, Temperature Units, Laser
Pointer, Crosshairs) 20

8.4 Image Mode Menu 21

8.5 Image Capture 21

8.6 Image Freeze (Data Hold) 21

9. CLAMP METER OPERATION 22

9.1 Auto/Manual Range Mode 22

9.2 Out-of-range Warning (OL) 22

9.3 Data Hold 22

9.4 VFD Mode (Low Pass Filter) 22

9.5 MAX-MIN Mode 23

9.6 DCA Zero Mode 23

9.7 Datalogger 23

9.8 Current and Frequency Measurements 25

9.9 Clamp Adaptor (FLEX) Current and Frequency Measurements 26

9.10 Inrush Current Measurements 27

9.11 Voltage, Lo Z, and Frequency Measurements 28

9.12 Resistance Measurements 29

9.13 Continuity Test 29

9.14 Classic Diode Test 30

9.15 Smart Diode Test 31

9.16 Capacitance Measurements 32

10. BLUETOOTH® COMMUNICATION 33

11. APPENDICES 34

11.1 Emissivity Factors for Common Materials 34

11.2 Non-Uniformity Correction 34

11.3 Infrared Energy and Thermal Imaging Overview 35

12. MAINTENANCE 36

12.1 Cleaning and Storage 36

FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

4

12.2 Battery Replacement 36

12.3 Disposal of Electronic Waste 36

13. SPECIFICATIONS 37

13.1 General specifications 37

13.2 Thermal Imaging Specifications 38

13.3 Electrical Specifications 39

14. TECHNICAL SUPPORT 43

15. WARRANTY 44

FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

5

1. Advisories

1.1 Copyright

© 2020, FLIR Systems, Inc. All rights reserved worldwide. No parts of the software

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

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

6

2. Safety

Safety Notes

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

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

7

Fig. 2.1 Laser Safety Information

Cautions

Do not use the device in a manner not specified by the manufacturer. This can cause damage to
the protection provided.

This symbol, adjacent to another symbol or terminal, indicates that the user
must refer to the user manual for further information.

This symbol, adjacent to a terminal, indicates that, under normal use, hazardous
voltages may be present.

Double insulation.

UL listing is not an indication or a verification of the accuracy of the meter

FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

8

3. Introduction

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

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

9

4. Meter Description

4.1 Front and Back Meter Descriptions

Fig. 4-1 Front View

1. Jaw opening trigger

2. Navigation Pad/OK button

3. MODE button

4. RANGE button

5. Data Hold (short press)/Work Light (long
press)

6. Rotary function switch

7. COM (negative -) Probe Input jack

8. Positive (+) Probe Input jack

9. Image Save button (short press)

10. Return/Exit button

11. IGMTM button (short press)

12. Color TFT Display

13. Clamp jaw

14. Work lights

15. Laser pointer lens

16. Thermal Imaging lens

17. Tripod mount

18. Battery compartment (micro USB port)

19. Battery compartment lock/unlock

Fig. 4-2 Rear View

FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

12

4.5 Other Display Icons

o

AC current or voltage

Resistance

10

-

3

(milli)

10

-

6

(micro)

MAX (Maximum) reading

MIN (Minimum) reading

C, oF

V

A

F

Hz

Temperature units

Emissivity

DC current or voltage

Continuity

Diode

Voltage

Current (Amperes)

Farad (for Capacitance)

Hertz (Frequency)

103 (kilo)

OL

Out of Range warning

Bar Graph

Bar Graph overload indicator

Meter is measuring voltage > 30 V (AC or DC)

FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

13

5. Meter Power

5.1 Powering the Meter

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

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

14

6. Menu System

6.1 Using the Menu System

Press OK to open the main menu, shown below:

Fig. 6-1 Main Menu

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

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

15

6.2.3 Gallery Mode

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:

VFD (low pass filter), see Section 9.4, VFD mode
MAX-MIN Readings, Section 9.5, MAX-MIN mode
Inrush Current, Section 9.10, Inrush Current mode
DCA Zero, Section 9.6, DCA mode
Datalogger, Section 9.7, Datalogger

6.2.5 General Settings Menu

1. Press OK to open the main menu.

2. Press OK at the General Settings icon to access the options.

3. See next section for detailed information on the General Settings mode

FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

17

7.1.5 Battery Selection

Press OK to toggle LITHIUM AA and ALKALINE AA battery types. Select the battery type in

use.

7.1.6 Bluetooth® ON/OFF

Press OK to toggle Bluetooth® ON/OFF (default is ON). Refer to Section 10, Bluetooth®

7.1.7 Button-press tone ON/OFF

Press OK to toggle the button-press tone ON/OFF

7.1.8 Language selection

Press OK to open the menu. Scroll to the desired language and press OK. Press to exit

7.1.9 Delete all Datalogger readings

Press OK to delete all datalogger records. The meter will ask for confirmation

7.1.10 Delete all Stored Images

Press OK to delete all saved images. The meter will ask for confirmation

7.1.11 View HELP Screen

Press OK to view FLIR support contact information

7.1.12 Viewing meter component information

Press OK to view meter component firmware version information and Laser data:

Meter firmware version
Lepton® camera interface firmware version

Bluetooth® firmware version

Laser data

FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

19

8.2 Thermal Imager Operation

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

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

21

8.4 Image Mode Menu

The Image Mode menu allows you to select:

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

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

22

9. Clamp Meter Operation

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

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

23

9.5 MAX-MIN Mode

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

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

24

To delete datalog sets:

1. With a datalog set open, press OK. Two icons will appear on the bottom of the

display, one for transmitting data and one for deleting.

2. Scroll to the Trash icon and press OK to delete all of the readings in the selected

set.

3. To delete ALL datalog sets at once, see Section 7.1.9, Delete All Datalog

Readings.

To transmit a datalog set via Bluetooth®:

1. Transmit data logs to a remote device running the FLIR Tools software suite.

Refer to Section 10, Bluetooth® Communication for more information.

2. , press OK. Two icons will appear on the bottom of the

display (for transmitting or deleting).

3. Scroll to the transmission icon and press OK to begin transmitting all of the

readings in the selected set.

4. Note that a micro USB port is located in the battery compartment. When

connected to a PC the CM275 operates in the same manner as an external
storage medium where you can drag and drop data logs and images from the

ry to a PC.

FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

25

9.8 Current and Frequency Measurements

WARNING Do not measure the current on a circuit when the voltage increases to more

than 1000V. This can cause damage to the instrument and can cause injury to persons.

When measuring current, the jaws should enclose one conductor only refer to Fig. 9-1.

Fig. 9.1 Correct (left image) and incorrect (right image)

1. Disconnect the probe leads from the meter.

2. Set the function switch to the position.

3. Select AC or DC using the button. If measuring DC Current be sure to ZERO

the display per Section 9.6, DCA Zero Mode.

4. To manually select the measurement range (scale), press the button

repeatedly. Refer to Section 9.1, Auto/Manual range mode.

5. Press the trigger to open the clamp jaws. Fully enclose one conductor refer to

Fig. 9.2. For optimum results, center the conductor in the jaws.

6. Read the current value on the display.

7. To see the Frequency measurement for an AC Current measurement use the
button to step to the Hz display.

8. For VFD mode operation refer to Section 9.4, VFD Mode.

9. For MAX-MIN operation, refer to Section 9.5, MAX-MIN Mode.

FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

27

9.10 Inrush Current Measurements

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

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

28

9.11 Voltage, Lo Z, and Frequency Measurements

Warning: If the measured voltage is > 30 V DC or AC RMS, the indicator is displayed.

1. Set the function switch to one of the following positions:

Voltage AC/DC measurements.

Voltage AC/DC measurements with a low impedance circuit, eliminating ghost

voltages. The impedance is approx. 2.5k . The LoZ indicator appears in this mode.

2. Insert the black probe lead into the negative COM terminal and the red probe lead

into the positive terminal. Refer to Fig. 9-4 below.

3. Use the button to select AC or DC measurement.

The indicator appears for AC measurements.
The indicator appears for DC measurements.

4. Connect the probe leads in parallel to the part under test.

5. Read the voltage value on the display.

6. To view the frequency (Hz) of the measured voltage, short press the button

until the Hz reading appears.

7. For VFD mode operation refer to Section 9.4, VFD Mode.

8. For MAX-MIN operation, refer to Section 9.5, MAX-MIN Mode.

Fig. 9-4 Voltage and Frequency Measurements

FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

33

10. Bluetooth® Communication

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

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

34

11. Appendices

11.1 Emissivity Factors for Common Materials

Material Emissivity Material Emissivity

Asphalt 0.90 to 0.98 Cloth (black) 0.98

Concrete 0.94 Skin (human) 0.98

Cement 0.96 Leather 0.75 to 0.80

Sand 0.90 Charcoal (powder) 0.96

Soil 0.92 to 0.96 Lacquer 0.80 to 0.95

Water 0.92 to 0.96 Lacquer (matt) 0.97

Ice 0.96 to 0.98 Rubber (black) 0.94

Snow 0.83 Plastic 0.85 to 0.95

Glass 0.90 to 0.95 Timber 0.90

Ceramic 0.90 to 0.94 Paper 0.70 to 0.94

Marble 0.94 Chromium Oxides 0.81

Plaster 0.80 to 0.90 Copper Oxides 0.78

Mortar 0.89 to 0.91 Iron Oxides 0.78 to 0.82

Brick 0.93 to 0.96 Textiles 0.90

11.2 Non-Uniformity Correction

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

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

35

11.3 Infrared Energy and Thermal Imaging Overview

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

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

36

12. Maintenance

12.1 Cleaning and Storage

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

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

37

13. Specifications

13.1 General specifications

Display counts: 0~6000

Measuring rate: 3 times per second

Over-range indication: OL or OL

Auto power off: Programmable: OFF, 1, 2, 5, or 10 (default) minutes

Low battery indicators: and low battery informaton screens appear

Power requirement: 3 × 1.5 V AA or TA04 rechargeable battery

Approximate battery life for thermal imager:

hours: Energizer L91 Lithium (Li/FeS

hours: Optional Rechargeable Battery: Li-Polymer; FLIR PN: TA04-KIT

Calibration: 1-year calibration cycle

Operating temperature:

32 to 86°F (0 to 30°C) ( 80% RH)

86 to 104°F (30 to 40°C) ( 75% RH)

104 to 122°F (40 to 50°C) ( 45%RH)

Storage temperature: 4 to 140°F (-20 to 60°C)

Relative Humidity: 0~80% RH (batteries not installed)

Temperature coefficient: 0.2 × (specified accuracy)/°C, <64.4°F (18°C), >82.4°F (28°C)

Operating altitude: (2000m)

Jaw opening: 1.38in (35mm)

Pollution degree: 2

IP Rating IP40

Dimensions: (D × W × L): 1.91 × 3.82 × 10.04 in (48.5 × 97 × 255 mm)

Weight: 16.2 oz (460g) without batteries

Agency Approvals: UL, CE, RCM

2

Over-voltage category: EN 61010-1 CAT IV-600 V, CAT III-1000 V, EN 61010-2-032

CAT Application field

III Distribution circuits, machinery, main switching devices close to switchgears,

industrial installations and high current close to distribution circuits

IV Installation sources, utility transformers, all outside conductors, counters, protective

devices on primary sides and electricity meters

FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

38

13.2 Thermal Imaging Specifications

Detector type FLIR Lepton®; Micro-bolometer Focal Plane Array (FPA)

Thermal Sensitivity 150mK

IR Imaging resolution 160 x 120 pixels

IR Imaging field of view 44° x 57° (vertical x horizontal)

IR Imaging spectral response

IR Image Capture Frequency 9Hz

IR Image Color Palettes Programmable: Iron, Rainbow, and Gray scale

Shutter Integrated, automatic shutter

Stored thermal image radiometry Fully radiometric

Laser Pointer Class I (red)

IR Temperature Measurement range +14°F ~ +302°F (-10°C ~ +150°C)

Over- and under- range indication OL

Temperature reading stabilization Dashes display while temperature reading stabilizes

IR Temperature Resolution 0.1°F (0.1°C)

IR Temperature Accuracy ±5.4°F (3°C) or ± 3% of reading; whichever is greater

Distance to Spot (D:S) ratio 30:1

Temperature Scanning Continuous

Emissivity 4 presets plus a custom setting (0.10 to 0.99)

Targeting Displayed Cross hairs pinpoint center of measurement spot

FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

39

13.3 Electrical Specifications

Accuracy is ± (% reading + number of digits (dgt)) at 73.4 °F ±9 °F (23°C ±5 °C), <80% RH.

Table 13.1 Voltage (TRMS)

Function Range Accuracy (of reading)

60.00V

DCV

1000 V

60.00 V

ACV

ACV VFD

Lo Z (Low Impedance)

Notes:

Overload protection: 1000V (rms)
Input impedance: 1

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

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

40

Table 13.2 Current (TRMS)

Functi

on Range

Accuracy

60.00

A

600.0

A

60.00

A

600.0 A

60.00

A

Function

Range

10.0~600.0

Hz

6.000

kHz

60.00

kHz

DCA

ACA

ACA VFD

600.0 A

±(2% + 5 dgt)

± (2% + 5dgt) 45 ~ 400Hz

± (2% + 5 dgt) 45~65Hz

± (6% + 5 dgt) 65~400Hz

Notes:

Overload protection: 600A (rms)

Position Error: ±1% of reading.

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

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

41

ACA function:
> 6A (rms) at 60.00A range for 10Hz ~ 1kHz
> 60A (rms) at 600.0A range for 10Hz ~ 1kHz

Hz function at ACA rotary switch:
> 6A (rms) for 10Hz ~ 10kHz

Table 13.4 Inrush current

Function Range Accuracy

60.00 A ±(3% + 0.3 A)

ACA Inrush

600.0 A ±(3% + 5 dgt)

Inrush current detection threshold: 0.5A for 60A range and 5.0A for 600.0A range
Overload protection: 1000 V
Integration time is 100 ms.

Table 13.5 Resistance, Continuity, and Diode

Function Range Accuracy

Resistance

Continuity 600.0 ±(1.0% + 5 dgt)

Diode 1.5V ±(1.5% + 5 dgt)

, 600 A (rms).

(rms)

±(1.0% + 5 dgt)

Overload protection: 1000 V
Maximum test current: Approx. 0.1 mA.

Maximum open circuit voltage for diode: Approx. 1.8 V.

Continuity threshold:

>

Continuity indicator: 2.7 kHz tone buzzer.
Continuity response time: <100 ms.

FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC

(rms)

.

: Approx. 1.8 V.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

42

Table 13.6 Capacitance

Function Range Accuracy

Capacitance ±(1.0% + 4 dgt)

Overload protection: 1000 V

(rms)

.

Table 13.7 Flex Clamp Adaptor Function

Function Range Accuracy

30.00 A

Flex (ACA)

±(1% + 5 dgt) 45 ~ 400Hz 300.0 A

3000 A

Additional accuracy for the Flex function is listed in the FLIR clamp adaptor User Manuals (Models
TA72_TA74).

Table 13.8 Flex Clamp Adaptor Function (Frequency)

Function Range Accuracy

600.0 Hz

Frequency (Flex)

±(0.1% + 2 dgt) 6.000 kHz

10.00 kHz

Sensitivity:

Flex function:
> 3A (rms) at 30.00A range for 10Hz ~ 1kHz
> 30A (rms) at 300.0A range for 10Hz ~ 1kHz
> 300A (rms) at 3000A range for 10Hz ~ 1kHz

Hz function at Flex rotary switch:
> 3A (rms) for 10Hz ~ 10kHz
> 6A (rms) for 10kHz ~ 60kHz

Work Lights

Color Temperature: 4000-5000°K

Beam Angle: ± 20°

Light Output: 70 lumens, minimum

Power: 0.5 Watt RMS

FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

43

14. Technical Support

Technical Support Website https://support.flir.com

FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

44

15. Warranty

15.1 FLIR Limited 10-year Warranty

-Year Warranty. Visit
https://support.flir.com/prodreg to read the Limited 10-Year Warranty
document.

FLIR CM275 USER MANUAL Document Identifier: CM275-en-US_AC

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com