AC Current
Oscilloscope Probe
Model SR661

CURRENT MEASUREMENT PROBES

Copyright© Chauvin Arnoux ® , Inc. d.b.a. AEMC Instruments. All rights reserved. No part of this documentation may be reproduced in any form or by any means (including electronic® storage and retrieval or translation into any other language) without prior agreement and written consent from Chauvin Arnoux , Inc., as governed by United States and International copyright laws. Chauvin Arnoux® , Inc. d.b.a. AEMC
Instruments
15 Faraday Drive • Dover, NH 03820 USA Phone: 603-749-6434 or 800-343-1391 • Fax: 603-742-2346®
This documentation is provided as is, without warranty of any kind, express, implied, or otherwise.
Chauvin Arnoux
Inc. has made every reasonable effort to ensure that this documentation is accurate; but does not warrant the accuracy or completeness of the text, graphics, or other information contained® in this documentation. Chauvin Arnoux Inc. shall not be liable for any damages, special, indirect,
incidental, or inconsequential; including (but not limited to) physical, emotional or monetary damages due to lost revenues or lost profits that may result from the use of this documentation, whether or not the user of the documentation has been advised of the possibility of such damages.

Statement of Compliance

Chauvin Arnoux® , Inc. d.b.a. AEMC Instruments certifies that this instrument has been calibrated using standards and instruments traceable to international standards.
We guarantee that at the time of shipping your instrument has met the instrument’s published specifications.
An NIST traceable certificate may be requested at the time of purchase, or obtained by returning he instrument to our repair and calibration facility, for a nominal charge.
The recommended calibration interval for this instrument is 12 months and begins on the date of receipt by the customer. For recalibration, please use our calibration services. Refer to our repair and calibration section at www.aemc.com/calibration.
Serial #:……………
Catalog #: 2113.49
Model #: SR661.
Please fill in the appropriate date as indicated:…………
Date Received:…………
Date Calibration Due:…………

INTRODUCTION

Thank you for purchasing an AEMC Instruments AC Current Oscilloscope Probe Model SR661.
For the best results from your instrument and for your safety, you must read the enclosed operating instructions carefully and comply with the precautions for use. Only qualified and trained operators should use this product.
1.1 INTERNATIONAL ELECTRICAL SYMBOLS

	Signifies that the instrument is protected by double or reinforced insulation.
	CAUTION – Risk of Danger! Indicates a WARNING. Whenever this symbol is present, the operator must refer to the user manual before operation.
	Indicates a risk of electric shock. The voltage at the parts marked with this symbol may be dangerous.
	Application or withdrawal authorized on conductors carrying dangerous voltages. Type A current sensor as per IEC 61010-2-032.
	This symbol signifies a voltage limiting circuit.
	Indicates Important information to acknowledge
	This product complies with the Low Voltage & Electromagnetic Compatibility European directives.
	In the European Union, this product is subject to a separate collection system for recycling electrical and electronic components in accordance with directive WEEE 2012/19/EU.

1.2 DEFINITION OF MEASUREMENT CATEGORIES
CAT IV: Corresponds to measurements performed at the primary electrical supply (< 1000 V).
Example: primary overcurrent protection devices, ripple control units, and meters.
CAT III: Corresponds to measurements performed in the building installation at the distribution level.
Example: hardwired equipment in fixed installation and circuit breakers.
CAT II: Corresponds to measurements performed on circuits directly connected to the electrical distribution system.
Example: measurements on household appliances and portable tools.
1.3 PRECAUTIONS FOR USE

• The safety warnings are provided to ensure the safety of personnel and proper operation of the instrument. Read the instructions completely.
• Use caution on any circuit: potentially high voltages and currents may be present and may pose a shock hazard.
•  Do not use the probe if damaged. Always connect the current probe to the measuring device before it is connected around the conductor.
• Do not use on non insulated conductor with a potential to ground greater than 600 V CAT III pollution 2. Use extreme caution when clamping around bare conductors or bus bars.
• Before each use, inspect the probe; look for cracks in housing or output cable insulation.
• Do not use clamp in wet environment or in locations that hazardous gases exist.
• Do not use the probe anywhere beyond the tactile barrier.

1.4 RECEIVING YOUR SHIPMENT
Upon receiving your shipment, make sure that the contents are consistent with the packing list. Notify your distributor of any missing items. If the equipment appears to be damaged, file a claim immediately with the carrier and notify your distributor at once, giving a detailed description of any damage. Save the damaged packing container to substantiate your claim.
1.5 ORDERING INFORMATION
AC Current Oscilloscope Probe Model SR661 ………………………..Cat. #2113.49 Includes a user manual.
1.5.1 Accessories and Replacement Parts
Adapter – BNC (Female) to 4 mm Banana (Male) ………………………..Cat. #2119.94

 PRODUCT FEATURES

2.1 DESCRIPTION
The AC Current Oscilloscope Probe Model SR661 expands oscilloscope applications in industrial or power environments, and is ideal for analysis and measurement of distorted current waveforms and harmonics.
The Model SR661 permits accurate display and measurement of currents from 100 mA to 1000 ARMS, 1 Hz to 100 kHz (with current derating) without breaking into the circuit. A passive filter eliminates noise, ring on rapid rising (di/dt) waveforms, and ensures accurate screen displays.
The probe connects directly to an oscilloscope through an insulated coaxial cable with an insulated BNC.
2.2 COMPATIBILITY
The Model SR661 is compatible with any analog or digital oscilloscope or other voltage-measuring instrument which has the following features:

• BNC input connector
• Range capable of displaying (0.2 to 0.5) V per division, or 2 V range
• Minimum input impedance of 1 MΩ

2.3 FEATURES

1. Jaw opening of 2.25 in
2. Maximum dimension of conductor is 2.13 in (54 mm)
3. Tactical Barrier. Always keep hands below this barrier at all times.
4. Arrow indicates direction of current flow. Current flows in a positive direction when it travels from supply to load.
5. Three position switch
6. 6.5 ft (2 m) output cable

 SPECIFICATIONS

3.1 ELECTRICAL SPECIFICATIONS
*Reference conditions: 23 °C ± 3 °K, (20 to 75) % RH, (48 to 65) Hz, external magnetic field
<40 A/m, no DC component, no external current carrying conductor, test sample centered.
Operating Range: (0.1 to 2000) A peak
Measurement Range: 100 mA to 1200 ARMS (2000 A peak)
Output Signal: mV output signal (2 V peak max)

100 mV/A:	10 mA to 20 A peak
10 mV/A:	(0.1 to 200) A peak
1 mV/A:	(1 to 2000) A peak

1 mV/A, (1 V at 1000 A)

Range	Accuracy	Phase Shift
(1 to 50) A	≤1 % ± 1 mV	N/A
(50 to 200) A		≤3°
(200 to 1000) A		≤2°
(1000 to 1200) A		≤1°

Overload: 15 minutes ON, 30 minutes OFF
10 mV/A, (1 V at 100 A)

Range	Accuracy	Phase Shift
(0.1 to 5) A	≤2 % ± 5 mV	N/A
(5 to 20) A		≤15°
(20 to 100) A		≤10°
(100 to 120) A		≤5°

Overload: 120 A continuous
100 mV/A, (1 V at 10 ARMS)

Range	Accuracy	Phase Shift
(0.1 to 0.5) A	≤3 % ± 10 mV	N/A
(0.5 to 2) A		N/A
(2 to 10) A		≤15°
(10 to 12) A

Overload: 12 A continuous
Frequency Range (with current derating):
1 Hz to 100 kHz (@ -3 dB); current derating above 1 kHz using the formula 1000 A x 1/(F (in kHx))
See typical response curves (pages 10-12)
Crest Factor: ≤ 6
Load Impedance: ≥1 MΩ @ ≤ 47 pF
Rise/Fall Time: <40 µS
Working Voltage: 600 V CAT III
Common Mode Voltage: 600 V CAT III
Influence of Adjacent Conductor: < 0.2 mA/AAC
Influence of Conductor Position in Jaw Opening: 0.02 % of Reading under 400 Hz
Influence of Frequency:

Range 1 mV/A:	From (10 to 1000) Hz: <1 % of Reading From (1 to 10) kHz: <2 % of Reading From (10 to 50) kHz: <10 % of Reading From (50 to 100) kHz: – 3 dB
Range 10 mV/A:	From (10 to 1000) Hz: <5 % of Reading From (1 to 10)kHz: <3 % of Reading From (10 to 50) kHz: <20 % of Reading From (50 to 100) kHz: – 3 dB
Range 100 mV/A:	From (10 to 1000) Hz: <10 % of Reading From(1 to 10) kHz: <5 % of Reading From (10 to 50) kHz: <20 % of Reading From (50 to 100) kHz: – 3 dB

3.2 MECHANICAL SPECIFICATIONS
Dimensions: (4.4 x 8.5 x 1.8) in (111 x 216 x 45) mm
Weight: (1.21 lbs) (550 g)
Jaw Opening: (2.25 in) (57 mm) max
Maximum Cable Diameter: (2.13 in) (54 mm)
Maximum Conductor Size:
Cable: (2.05 in) (52 mm)
Bus Bar: (1.95 x .19 in) (50 x 5 mm)
Case Protection: IP 40 (IEC 529)
Drop Test: 1 m (IEC 68-2-32)
Mechanical Shock: 100 g (IEC 68-2-27)
Vibration: (5 to 15) Hz, 0.15 mm (IEC 68-2-6)
(15 to 25) Hz, 1 mm (25 to 55) Hz, 0.25 mm
Output: Insulated lead with insulated BNC Connector, 6 ft (2 m)
3.3 ENVIRONMENTAL SPECIFICATIONS
Operating Temperature/RH: (14 to 122) °F (-10 to 50) °C)
Storage Temperature/RH: (- 4 to 158) °F (-20 to 70) °C
Altitude: Non-operating: (0 to 12,000) m
Operating: (0 to 2000) m
Operating Relative Humidity: (0 to 85) % @ 35 °C
Influence of Temperature: ≤0.15 % / 10 K
Influence of Humidity: (10 to 90) %: 0.1 %
3.4 SAFETY SPECIFICATIONSElectrical – Conformity to International Standards
This instrument is compliant with IEC 61010-2-032, 300 V in CAT IV or 600 V in CAT III.
Double or reinforced insulation
Type of current sensor per IEC 61010-2-032: type A
Dielectric Strength: 5550 V, 50/60 Hz between primary, secondary, and the outer case of the handle
Electromagnetic Compatibility:
This device is in conformity with standard IEC 61326-1.
*Specifications are subject to change without notice.
3.5 TYPICAL RESPONSE CURVES
1mV/A Range:10mV/A Range:100mV/A Range:

OPERATION

4.1 CURRENT MEASUREMENT
WARNING: Always connect the probe to the instrument before clamping onto the circuit under test.

• Connect the Model SR661 to the proper input channel on the oscilloscope.
• Begin with the least sensitive range on the current probe (1 mV/A)
• Select the 0.5 V/Division range on the oscilloscope.
• Clamp the probe on the conductor to be measured and read the current flowing directly on your oscilloscope.

NOTE: Remember to unclamp the probe from the conductor before disconnecting it from your meter or instrument.
You may also use your oscilloscope to amplify the signal while using the 1 mV/A probe range (which offers the best accuracy and least phase shift).
NOTE: It is possible to change the range on the current probe without removing the probe from the current carrying conductor, but it is important to remember not to exceed the permissible peak ratings of 2000 mV peak or 4000 mV peak to peak maximum.
The peak ratings by range are: 20 A peak @ 100 mV/A, 200 A peak @ 10 mV/A and 2000 A peak @ 1 mV/A.

MAINTENANCE

WARNING

• To ensure optimum performance, it is important to keep the probe jaw mating surfaces clean at all times. Failure to do so may result in error in readings.
• For maintenance use only specified factory replacement parts.
• To avoid electrical shock, do not attempt to perform any servicing unless you are qualified to do so.
• To avoid electrical shock and/or damage to the instrument, do not allow water or other foreign substances into the case.
• Disconnect the unit from all circuits and test cables before opening the case.
• Use caution with metallic tools that may short battery packs, power supplies, etc.

5.1 CLEANING

• To clean the probe body, use a soft cloth dampened in a solution of mild detergent and water. To clean the core, open the jaw and clean the exposed core surfaces with a cotton swab dampened with isopropyl alcohol (isopropanol) or ethyl alcohol (fotocol or ethanol). Lubricate the jaws mating surfaces with a light oil.
• Do not use chemicals containing benzine, benzene, toluene, xylene, acetone, or similar solvents.
• Do not immerse the probe in liquids or use abrasive cleaners.

5.2 REPAIR AND CALIBRATION
To ensure that your instrument meets factory specifications, we recommend that it be scheduled back to our factory Service Center at one-year intervals for recalibration, or as required by other standards or internal procedures.
For instrument repair and calibration:
You must contact our Service Center for a Customer Service Authorization Number (CSA#). Send an email to repair@aemc.com requesting a CSA#, you will be provided a CSA Form and other required paperwork along with the next steps to complete the request. Then return the instrument along with the signed CSA Form. This will ensure that when your instrument arrives, it will be tracked and processed promptly.
Please write the CSA# on the outside of the shipping container. If the instrument is returned for calibration, we need to know if you want a standard calibration or a calibration traceable to N.I.S.T. (includes calibration certificate plus recorded calibration data).
Ship To: Chauvin Arnoux® , Inc. d.b.a. AEMC Instruments
15 Faraday Drive • Dover, NH 03820 USA
Phone: 800-945-2362 (Ext. 360) / 603-749-6434 (Ext. 360)
Fax: 603-742-2346
E-mail: repair@aemc.com
(Or contact your authorized distributor.)
Contact us for the costs for repair, standard calibration, and calibration traceable to N.I.S.T.
NOTE: You must obtain a CSA# before returning any instrument.
5.3 TECHNICAL ASSISTANCE
If you are experiencing any technical problems or require any assistance with the proper operation or application of your instrument, please call, e-mail or fax our technical support team:
Chauvin Arnoux ® , Inc. d.b.a. AEMC Instruments
Phone: 800-343-1391 (Ext. 351)
Fax: 603-742-2346
E-mail: techsupport@aemc.com
www.aemc.com
5.4 LIMITED WARRANTY
The instrument is warrantied to the owner for a period of two years from the date of original purchase against defects in manufacture. This limited warranty is given by AEMC
Instruments, not by the distributor from whom it was purchased. This warranty is void if the unit has been tampered with, abused, or if the defect is related to service not performed by AEMC® Instruments.
Full warranty coverage and product registration is available on our website at www.aemc.com/warranty.html.
Please print the online Warranty Coverage Information for your records.
What AEMC Instruments will do:
If a malfunction occurs within the warranty period, you may return the® instrument to us for repair, provided we have your warranty registration information on file or a proof of purchase. AEMC
Instruments will repair or replace the faulty material at our discretion.
REGISTER ONLINE AT: www.aemc.com/warranty.html
5.4.1 Warranty Repairs
What you must do to return an Instrument for Warranty Repair:
First, send an email to repair@aemc.com requesting a Customer Service Authorization Number (CSA#) from our Service Department. You will be provided a CSA Form and other required paperwork along with the next steps to complete the request. Then return the instrument along with the signed CSA Form. Please write the CSA# on the outside of the shipping container. Return the instrument, postage or shipment pre-paid to: Chauvin Arnoux® , Inc. d.b.a. AEMC Instruments
15 Faraday Drive, Dover, NH 03820 USA Phone: 800-945-2362 (Ext. 360) 603-749-6434 (Ext. 360) Fax: 603-742-2346 E-mail: repair@aemc.com
Caution: To protect yourself against in-transit loss, we recommend that you insure your returned material.
NOTE: You must obtain a CSA# before returning any instrument.

AEMC ®
Instruments
15 Faraday Drive • Dover, NH 03820 USA
Phone: +1 603-749-6434 • +1 800-343-1391 • Fax: +1 603-742-2346
www.aemc.com
© 2009 Chauvin Arnoux®
, Inc. d.b.a. AEMC®
Instruments. All Rights Reserved.

Documents / Resources

AEMC INSTRUMENTS SR661 AC Current Oscilloscope Probe [pdf] User Manual SR661 AC Current Oscilloscope Probe, SR661, AC Current Oscilloscope Probe, Current Oscilloscope Probe, Oscilloscope Probe, Probe

References

• User Manual