AEMC INSTRUMENTS JM875 AC Current Probe User Manual

AEMC INSTRUMENTS JM875 AC Current Probe

Product Information

Specifications

• Model: JM875
• Working Voltage: 600V AC
• Common Mode Voltage: 600V AC
• Open Secondary Voltage: 10V Max.
• Influence of Adjacent Conductor: 0.005A/A AC
• Influence of Conductor in Jaw Opening: 1.5% of reading
• Influence of DC Current: 0.05% per A DC
• Jaw Opening: 3.54″ (90mm)
• Maximum Conductor Size:
  • Cable: 2.52″ max. (64mm)
  • Bus  bar: 1.97″ x 5.31″ (50 x 135mm)
  • 2.52″ x 3.94″ (64 x 100mm)
• Envelope Protection: IP 20 (IEC 529)
• Drop Test: 500mm (IEC 68-2-32)
• Mechanical Shock: 100 g (IEC 68-2-27)
• Vibration: 10/55/10Hz, 0.15 mm (IEC 68-2-6)
• Polycarbonate Material:
  • Handles: 10% fiberglass charged polycarbonate UL 94 V0
  • Jaws: ABS UL 94 V2
• Dimensions: 4.72″ x 12.40″ x 1.89″ (120 x 315 x 48 mm)
• Weight: 2.65 lbs. (1200 g)
• Colors: Dark gray handles with red jaws
• Output: Two standard safety banana jacks (4 mm)

Product Usage Instructions

Measurement Categories

• Category II: For measurements performed on circuits directly connected to the electrical distribution system. Examples are measurements on household appliances or portable tools.
• Category III: For measurements performed in the building installation at the distribution level such as on hardwired equipment in fixed installation and circuit breakers.
• Category IV: For measurements performed at the primary electrical supply (100kV and above).

Safety Specifications

• Electrical: Double insulation or reinforced insulation between primary or secondary and outer case of handle upon IEC 1010-2-32
• Common Mode Voltage: 600V Category III, Pollution: 2

FAQ

Q: What is the maximum working voltage for this AC Current Probe?

• A: The maximum working voltage is 600V AC.

Q: What is the maximum jaw opening of this probe?

• A: The jaw opening is 3.54″ (90mm).

Q: What is the weight of this AC Current Probe?

• A: The weight is 2.65 lbs. (1200 g).

Q: What are the dimensions of this probe?

• A: The dimensions are 4.72″ x 12.40″ x 1.89″ (120 x 315 x 48 mm).

Q: What are the output connectors of this probe?

• A: The probe has two standard safety banana jacks (4 mm) as output connectors.

Q: What are the recommended cleaning procedures for the probe jaws?

• A: To clean the probe jaws, use very fine sandpaper (fine 600) to avoid scratching the jaw, then gently clean with a soft oiled cloth.

Q: How can I get technical and sales assistance?

• A: If you are experiencing any technical problems or require assistance with the proper use or application of this instrument, please contact our technical hotline.

DESCRIPTION

• The JM875 (Catalog #2110.89) is designed for use in industrial environments. The “squared” jaws permit multiple conductor or bus bar positioning.
• The voltage output makes it the perfect tool for measurement with DMMs, recorders, power, and harmonic meters. Three ranges allow you to obtain the best resolution even on low current measurements.
• The Model JM875 is compatible with any AC voltmeter, multimeter, or other voltage-measuring instrument with an input impedance greater than 1 M.
• To achieve the stated accuracy, use the JM875 with a voltmeter having an accuracy of 0.75%.

WARNING

• These safety warnings are provided to ensure the safety of personnel and the proper operation of the instrument.
• Read the instruction manual completely and follow all the safety information before attempting to use or service this instrument.
• Use caution on any circuit: Potentially high voltages and currents may be present and may pose a shock hazard.
• Read the Safety Specifications section before using the current probe. Never exceed the maximum voltage ratings given.
• Safety is the responsibility of the operator.
• ALWAYS connect the current probe to the display device before clamping the probe onto the sample being tested.
• ALWAYS inspect the instrument, probe, probe cable, and output terminals before use. Replace any defective parts immediately.
• NEVER use the current probe on electrical conductors rated above 600 V in overvoltage category III (CAT III). Use extreme caution when clamping around bare conductors or bus bars.

INTERNATIONAL ELECTRICAL SYMBOLS

• This symbol signifies that the current probe is protected by double or reinforced insulation. Use only factory specified replacement parts when servicing the instrument.
• This symbol signifies CAUTION! and requests that the user refer to the user manual before using the instrument.
• This is a type A current sensor. This symbol signifies that application around and removal from HAZARDOUS LIVE conductors is permitted.

DEFINITION OF MEASUREMENT CATEGORIES

• Cat. II: For measurements performed on circuits directly connected to the electrical distribution system.
• Examples are measurements on household appliances or portable tools.
• Cat. III: For measurements performed in the building installation at the distribution level such as on hardwired equipment in fixed installation and circuit breakers.

Cat. IV: For measurements performed at the primary electrical supply (<1000V) such as on the primary overcurrent protection devices, ripple control units, or meters.
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.
• f 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.

ELECTRICAL SPECIFICATIONS

Current Range:

• 100mA to 30A AC continuous cycle  1 to 300A AC continuous cycle  1 to 2000A AC continuous cycle for the full temperature range  (2800 A if temperature is < 35°C or 95°F)

Output Signal:

• 100mV AC/A AC (3V at 30A) 90A peak 10mV AC/A AC (3V at 300A) 900A peak 1mV AC/A AC (3V at 3000A) 9000A peak

Accuracy and Phase Shift: 30A RANGE

Probe Impedance: 1000Ω 300A RANGE

Probe Impedance: 100Ω 3000A RANGE

• Probe Impedance: 10
• (Reference conditions: 23°C±3°K, 20 to 85% RH, 48 to 65 Hz, external magnetic field < 40 A/m, no DC component, no external current carrying conductor, test sample centered.) Load impedance ≥ 1 M.
• Overload: 3200 A during 5 mn
• Accuracy: Per IEC 185-26-27
• Ampere Second Product: 100 A.s
• dV/Dt: 100 mV AC/A AC: dV/Dt = 400 mV/µs 10 mV AC/A AC: dV/Dt = 50 mV/µs 1 mV AC/A AC: dV/Dt – 5 mV/µs
• Frequency Range: 30Hz to 5kHz; current derating above 200Hz on the 3000A range
• Load Impedance: > 100k
• Working Voltage: 600V AC
• Common Mode Voltage: 600V AC
• Open Secondary Voltage: 10V Max.
• Influence of Adjacent Conductor: 0.005A/A AC
• Influence of Conductor in Jaw Opening: 1.5% of reading
• Influence of Frequency from 30Hz to 5kHz: ± 6% on all ranges
• Influence of DC Current: 0.05% per A DC

MECHANICAL SPECIFICATIONS

• Operating Temp.: 14° to 122°F (-10° to 50°C)
• Storage Temp.: -40° to 185°F (-40° to 85°C)
• Influence of Temperature: < 0.1% per 10°K
• Jaw Opening: 3.54″ (90mm)
• Maximum Conductor Size:
  • Cable: 2.52″ max. (64mm)
• Bus bar: 1.97 x 5.31″ (50 x 135mm) 2.52 x 3.94″ (64 x 100mm)
• Envelope Protection: IP 20 (IEC 529)
• Drop Test: 500mm (IEC 68-2-32)
• Mechanical Shock: 100 g (IEC 68-2-27)
• Vibration: 10/55/10Hz, 0.15 mm (IEC 68-2-6)

Polycarbonate Material:

• Handles: 10% fiberglass charged polycarbonate UL 94 V0
• Jaws: ABS UL 94 V2
• Dimensions: 4.72 x 12.40 x 1.89″ (120 x 315 x 48 mm)
• Weight: 2.65 lbs. (1200 g)
• Colors: Dark gray handles with red jaws
• Output: Two standard safety banana jacks (4 mm)

SAFETY SPECIFICATIONS

• Electrical: Double insulation or reinforced insulation between primary or secondary and outer case of handle upon IEC 1010-2-32
• Common Mode Voltage: 600V Category III, Pollution: 2

ORDERING INFORMATION

• Current Probe JM875 . ………………….. Cat #2110.89

Accessories:

• Leads, set of 2, 5 ft. safety (1000V) …. Cat #2111.29
• Lead No. 211 for Probe 5 A Series . …. Cat #2950.06

OPERATION

• Please make sure that you have already read and fully understand the WARNING section.
• Making Measurements with the AC Current Probe Model JM875
• Connect the black and red terminals to the Volt AC range of your DMM or voltage-measuring instrument.
• Select the appropriate voltage range. If the current magnitude is unknown, select the highest range (3000A AC / 3V AC) on the switch probe located inside the handle. Clamp the probe around the conductor to be tested.
• If the reading is less than 300mV or 30mV, select the lower range until you obtain the best resolution.
• Read the value displayed on the DMM (in mV) and divide it by the range selected. (If reading = 2.59V on the 10mV AC/A AC range, the current flowing through the probe is 2590mV ÷ 10 = 259A AC).
• For best accuracy: carefully center the conductor inside the probe jaw and, avoid if possible, the proximity of other conductors which may create noise.

Tips for Making Precise Measurements

• When using a current probe with a meter, it is important to select the range that provides the best resolution.
• Failure to do this may result in measurement errors.
• Make sure that probe jaw mating surfaces are free of dust and contamination.
• Contaminants cause air gaps between the jaws, increasing the phase shift between primary and secondary.
• It is very critical for power measurement.

MAINTENANCE

Warning

• For maintenance use only original 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 get water or other foreign agents into the probe.
• 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 errors in readings. The following is the recommended procedure for cleaning the probe jaws: Use very fine sandpaper (fine 600) to avoid scratching the jaw, then gently clean with a soft oiled cloth.

REPAIR AND CALIBRATION

• You must contact our Service Center for a Customer Service Authorization number (CSA#).
• 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.
• Chauvin Arnoux®, Inc. d.b.a. AEMC® Instruments
• 15 Faraday Drive Dover, NH 03820 USA
• 800-945-2362 (Ext. 360)
• 603-749-6434 (Ext. 360)
• repair@aemc.com
• (Or contact your authorized distributor)
• NOTE: All customers must obtain a CSA# before returning any instrument.

TECHNICAL AND SALES ASSISTANCE

• If you are experiencing any technical problems, or require any assistance with the proper use or application of this instrument, please contact our technical hotline: 800-945-2362 (Ext. 351)
• 603-749-6434 (Ext. 351)
• techsupport@aemc.com

LIMITED WARRANTY

• The current probe is warranted to the owner for 2 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, or abused or if the defect is related to service not performed by AEMC® Instruments.
• Full warranty coverage and product registration are available on our website at: www.aemc.com/warranty.html.
• Please print the online Warranty Coverage Information for your records.

References

• AEMC Warranty Registration
• Manual-Hub.com – Free PDF manuals!

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