FLIR CM94 User Manual
USER MANUAL
True RMS AC/DC
2000A Utility
Clamp Meter
Model CM94
USER MANUAL
True RMS AC/DC 2000A
Utility Clamp Meter
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Table of contents
1 Advisories............. ................. ............... ................. .. ..........1
1.1 Copyright......... ............. .. ................. ............... .......... 1
1.2 Quality Assurance ............... ............... ................. .......1
1.3 Documentation ............... ............... ................. ...........1
1.4 Disposal of Electronic Waste..... ............... .. ............... .... 1
2 Introduction...... .. ............. .. ................. ............. .. ................. 2
3 Safety ..... ............. .. ................. ............... ................. ...........3
3.1 General Safety Information ............... ................. ...........3
3.2 Safety Terms Used In This Manual ........... ................. .. ...3
3.3 Warning and Caution Statements .. ............... ............... .. .3
3.4 International Electrical Symbols ......... .. ............... ...........5
3.5 CENELEC Directives.............. .. ............... .. ............... ...5
4 Descriptions ...... ............... .. ............... .. ............. .. ............... .6
4.1 Product Description.. .. ............. .. ............... .. ............. .. .. 6
4.2 Control Button Descriptions ...... ............... .. ............... .... 7
4.3 Rotary Switch Positions......... ............... .. ............... .......7
4.4 Display Description ................ .. ............. ................. .. ...8
5 Meter Operation .............. .. ............. .. ............... .. ............... ...9
5.1 Powering the Meter .. ............... ................. ............... .... 9
5.2 Auto Power OFF (APO).......... .. ............... ............... .. .... 9
5.3 Automatic and Manual Ranges .......... ................. ...........9
5.4 Out-of-Range Alert.......... .. ............... .. ............. .. ........ 10
5.5 Display Hold Function.......... ................. ............... .. .... 10
5.6 Display Backlight ................ ................. ............... ..... 10
5.7 AC and DC Voltage Measurements.... ................. .......... 10
5.8 LoZ Voltage Measurements ........ .. ............. .. ............... 12
5.9 Low Pass Filter (VFD) AC Voltage Measurements .. .. ........ 12
5.10 Current Clamp Measurements....... ................. ............. 13
5.11 Resistance Measurements .... ............... .. ............... ..... 14
5.12 Continuity Measurements........... .. ............. .. ............... 15
5.13 Diode Measurements ............. .. ............. .. ................. . 16
5.14 Capacitance Measurements ............ .. ............... .. ........ 18
5.15 Type-K Thermocouple Measurements........... .. .............. 19
5.16 Non-Contact AC Voltage Detector ............. ............... .. .. 20
6 Maintenance............. .. ............. .. ............... .. ............. .. ....... 22
6.1 Cleaning........... .. ............... ............... .. ............... ..... 22
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Table of contents
6.2 Battery Replacement....... .. ............. .. ............... .. ........ 22
6.3 Meter Storage... ................. ............... ................. .. .... 22
7 Specifications..... ................. ............... ................. ............. 23
7.1 General Specifications..... .. ............. .. ............... .. ........ 23
7.2 DC Voltage Specifications ........... .. ............... .. ............ 24
7.3 LoZ (DC Voltage) Specifications.. ............. .. ................. . 24
7.4 AC Voltage Specifications................ ............... ............ 24
7.5 LoZ (AC Voltage) Specifications..... ............... .. ............. 25
7.6 VFD (low pass filter) AC Voltage Specifications .. ............. 25
7.7 PEAK HOLD Capture Mode Specifications............ ......... 25
7.8 Resistance Specifications.. ............... ................. ......... 25
7.9 Continuity Specifications . ................. ............... ........... 25
7.10 Capacitance Specifications.......... .. ............... .. ............ 26
7.11 Diode Specifications ........... ................. .. ............. .. .... 26
7.12 DC Current Specifications (Clamp) ........ ............... .. ...... 26
7.13 AC Current Specifications (Clamp) ..... ............. .. ........... 26
7.14 Hz Line Level Frequency Specifications.... ............... .. .... 27
7.15 Temperature Specifications...... ............... ................. ... 27
7.16 Non-Contact AC Voltage Detector (NCV) ....... ............... . 28
7.17 Input Specifications... ................. ............... ................ 28
7.18 Safety Specifications .. ............... .. ............. .. ............... 28
8 Three-Year Warranty ....... .. ............... ............... .. ............... .. 29
9 Customer Support....... .. ............... ................. ............... ..... 30
9.1 Corporate Headquarters .............. .. ............... ............. 30
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Advisories
1.1 Copyright
©2019, 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:
https://support.flir.com. It only takes a few minutes to register online. In the
download 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.
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Introduction
The CM94 is a high accuracy, rugged measurement instrument intended for
the electrical utility and industrial maintenance professional for inspecting and
troubleshooting high voltage/current electrical infrastructure systems and
equipment. The low input impedance mode (LoZ) helps determine whether a
measured voltage is ‘real’ or induced by load carrying cables running adjacent
and parallel to the measurement target (ghost voltage).
Visit https://www.support.flir.com/prodreg to register your CM94 and to read
the three-year warranty text.
Features
• Primary 6000 count and secondary 1999 count dual backlit displays
• Dual display of ACA + Hz and ACV + Hz
• Rated CAT IV 1000V / 2000A
• True RMS sensing
• VFD-V and VFD-Hz for use with variable speed drives
• Non-contact voltage detection (NCV)
• PEAK mode captures Peak Min and Peak Max current/voltage in 5 millisecond window
• Data Hold and Relative/Zero modes
• Auto Power OFF (APO) in 34 minutes
• LoZ mode to help detect ‘ghost’ voltages
• Type-K thermocouple temperature measurements
• Large jaws accommodate 2.2 in. (55 mm) cables
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Safety
3.1 General Safety Information
This user manual contains information and warnings that must be followed for
operating the instrument safely and maintaining the instrument in a safe operating condition. If the instrument is used in a manner not specified by the manufacturer, the protection provided by the instrument may be impaired.
The meter protection rating, against the users, is double insulation per UL/
IEC/EN61010-1 Ed. 3.0, IEC/EN61010-2-033 Ed. 1.0, CAN/CSA C22.2 No.
61010-1 Ed. 3.0, IEC/EN61010-2-032 Ed. 3.0 & IEC/EN61010-031 Ed. 1.1:
Measurement Category IV 1000V AC & DC.
Per IEC61010–1 OVERVOLTAGE CATEGORY
OVERVOLTAGE CATEGORY II (CAT II) is for equipment intended to be supplied from the building wiring. It applies both to plug-connected equipment
and to PERMANENTLY CONNECTED EQUIPMENT.
OVERVOLTAGE CATEGORY III (CAT III) is for equipment intended to form
part of a building wiring installation. Such equipment includes socket outlets,
fuse panels, and some MAINS installation control equipment.
OVERVOLTAGE CATEGORY IV (CAT IV) is for equipment installed at or near
the origin of the electrical supply to a building, between the building entrance
and the main distribution board. Such equipment may include electricity tariff
meters and primary over-current protection devices.
3.2 Safety Terms Used In This Manual
WARNING: Identifies conditions and actions that could result in serious injury
or even death to the user.
CAUTION: Identifies conditions and actions that could cause damage or malfunction in the instrument.
3.3 Warning and Caution Statements
WARNING
To reduce the risk of fire or electric shock, do not expose this product to rain or moisture.
The meter is intended only for indoor use.
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Safety
WARNING
To avoid electrical shock hazard, observe the proper safety precautions when working with
voltages above 60 VDC or 30 VAC rms. These voltage levels pose a potential shock hazard to the user. Before and after hazardous voltage measurements, test the voltage function on a known source such as line voltage to determine proper meter functioning.
WARNING
Keep hands/fingers behind the hand/finger barriers (of the meter and the test leads) during
measurement. Inspect test leads, connectors, and probes for damaged insulation or exposed metal before using the instrument. If any defects are found, replace them immediately. Use only the test leads provided with the equipment (or UL Listed probe assemblies
rated CAT IV 1000V or better).
WARNING
The accompanied test probe assembly meets UL/IEC/EN61010-031 Ed. 1.1 to the same
meter ratings or better. IEC 61010-031 requires exposed conductive test probe tips to be
≤ 4mm for CAT III & CAT IV ratings. Refer to the category markings on your probe assemblies as well as on the add-on accessories (detachable Caps or Alligator Clips, etc.), if any,
for applicable rating changes.
WARNING
This Clamp meter is designed for clamping around or removing from non-insulated, hazardous live conductors. Nonetheless, individual protective equipment must be used when
hazardous live parts in the installation, where the measurement is to be made, could be
accessible.
WARNING
Remove test leads from the meter before taking clamp measurements.
CAUTION
Disconnect the test leads from the test points before changing meter functions.
CAUTION
Do not use the device for a procedure that it is not intended for. This can cause damage to
the protection built into the instrument.
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Safety
3.4 International Electrical Symbols
Caution! Refer to the explanation in the user manual.
Caution! Risk of electrical shock.
Earth ground.
Double/reinforced insulation.
Fuse.
AC (alternating current).
DC (direct current).
Application around, and removal from, hazardous live conductors is
permitted.
3.5 CENELEC Directives
This instrument conforms to CENELEC Low-voltage directive 2014/35/EC,
Electromagnetic compatibility directive 2014/30/EU and RoHS directive 2011/
65/EU.
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Descriptions
4.1 Product Description
Figure 4.1 Product Description
1. Non-Contact Voltage Detector (NCV) antenna
2. Clamp jaws
3. Conductor alignment icon
4. Hand/finger barrier
5. Jaw opening trigger
6. Display
7. RANGE button
8. MODE /Display backlight button
9. Negative (COM) input terminal
10. Positive input terminal
11. Non-Contact Voltage detector button
12. ZERO /Relative mode button
13. Battery compartment
14. HOLD /PEAK button
15. Rotary selector switch
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