AEMC JM815A AC Current Probe User Manual
- June 17, 2024
- AEMC
Table of Contents
AEMC JM815A AC Current Probe User Manual
Model JM815A
DESCRIPTION
The JM815A (Catalog #2110.81) is designed for use in industrial environments. The “squared” jaws permit multiple conductor or bus bar positioning. The current output makes it the perfect tool for measurement with DMMs, recorders, power and harmonic meters. The Model JM815A is compatible with any AC ammeter, multimeter, or other current measuring instrument with an input impedance lower than 0.6Ω. To achieve the stated accuracy, use the JM815A with the DMM having an accuracy of 0.75%.
WARNING
These safety warnings are provided to ensure the safety of personnel and
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 prior to 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
prior to use. Replace any defective parts immediately.
• NEVER use the current probe on electrical conductors rated above 600 V. 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. I: For measurements on circuits not directly connected to the AC supply
wall outlet such as protected secondaries, signal level, and limited energy
circuits.
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 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. 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.
ELECTRICAL SPECIFICATIONS
Current Range:
1 to 1000A AC, continuous cycle for the full temperature range
Transformation Ratio:
1000:5
Output Signal:
5 mA AC/A AC (5A at 1000A)
*Accuracy and Phase Shift:**
(*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 0.2Ω.
Overload: 1200A continuous
Accuracy: Per IEC 185-26-27
Class 1 from 48 to 1000 Hz
Frequency Range:
30 Hz to 5 kHz; current derating above 1 kHz for continuous use
Load Impedance: ≤ 0.6Ω
Working Voltage: 600V AC
Common Mode Voltage: 600V AC
Influence of Adjacent Conductor: 0.005A/A AC
Influence of Conductor in Jaw Opening: 1% ± 0.1A of reading
MECHANICAL SPECIFICATIONS
Operating Temperature:
14° to 122°F (-10° to 50°C)
Storage Temperature:
-13° to 176°F (-25° to 80°C)
Influence of Temperature:
< 0.1% per 10°K
Jaw Opening: 3.54″ (90 mm)
Maximum Conductor Size:
Cable: 2.52″ ∅ max. (64mm)
Bus bar: 1.97 x 5.31″ (50 x 135 mm) 2.52 x 3.94″ (64 x 100 mm)
Envelope Protection:
IP 20 (IEC 529)
Drop Test:
500 mm (IEC 68-2-32)
Mechanical Shock:
100 g (IEC 68-2-27)
Vibration:
10/55/10 Hz, 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:
5 ft. (1.5m) lead with safety 4mm banana plug
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 JM815A. …………….Cat #2110.81
Includes a user manual and a product warranty
and registration card
Accessories:
Banana plug adapter
(to nonrecessed plug)…………………Cat #1017.45
OPERATION
Please make sure that you have already read and fully understand the WARNING section on page 1.
Making Measurements with the AC Current Probe Model JM815A
• Connect the black and red terminals to the Ampere AC range of your DMM or
current measuring instrument. Select the appropriate current range (5A AC).
Clamp the probe around the conductor to be tested. If the reading is less than
2 A, select the lower range until you obtain the best resolution. Read the
value display on the DMM and multiply it by the probe ratio (1000/5 = 200).
(If reading = 0.592A AC, the current flowing through the probe is 0.592 A x
200 = 118.4 A)
• For best accuracy: carefully center the conductor inside the probe jaw,
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 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.
Maintenance
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. The following is the
recommended procedure for cleaning the probe jaws: Use a very fine sand paper
(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. 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).
Chauvin Arnoux®, Inc. d.b.a. AEMC® Instruments
15 Faraday Drive • Dover, NH 03820 USA
Tel: 800-945-2362 (Ext. 360)
603-749-6434 (Ext. 360)
Fax: 603-742-2346 or
603-749-6309
repair@aemc.com
(Or contact your authorized distributor)
Costs for repair, standard calibration, and calibration traceable to N.I.S.T.
are available.
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 call our technical
hotline:
800-343-1391 •
508-698-2115 • Fax
508-698-2118
Chauvin Arnoux®, Inc. d.b.a. AEMC® Instruments techsupport@aemc.com
www.aemc.com
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