AEMC instruments JM865A User manual

AC Current Probe
Model JM865A
User Manual
DESCRIPTION
The JM865A (Catalog #2110.88) 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.
Three ranges allow you to obtain the best resolution even on low current measurement.
The JM865A is compatible with any AC ammeter, multimeter, or other current measuring
instrument with an input impedance lower than 2 Ω. To achieve the stated accuracy, use the
JM865A with an ammeter with an accuracy of 0.75 % or better.
WARNING
These safety warnings are provided to ensure the safety of personnel and proper operation
of this instrument.
■Read this instruction manual completely and follow all 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 Specications 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 in
overvoltage category III (CAT III). Use extreme caution when clamping around bare
conductors or bus bars
INTERNATIONAL ELECTRICAL SYMBOLS
This symbol signies that the current probe is protected by double or reinforced
insulation. Use only factory-specied replacement parts when servicing the instrument.
This symbol signies CAUTION! The user must refer to the user manual before using
the instrument.
This symbol signies that this is a type A current sensor and that application near and
removal from HAZARDOUS LIVE conductors is permitted.
DEFINITION OF MEASUREMENT CATEGORIES
CAT IV: For measurements performed at the primary electrical supply (<1000 V), such as
primary overcurrent protection devices, ripple control units, or meters.
CAT III: For measurements performed in the building installation at the distribution level,
such as hardwired equipment in xed installation or circuit breakers.
CAT II: For measurements performed on circuits directly connected to the electrical
distribution system, such as household appliances or portable tools.
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,
le a claim immediately with the carrier and notify your distributor at once with a detailed
description of any damage.

CURRENT PROBE - JM865A DRAWING
4.72"
(120 mm)
1.89"
(48 mm)
12.40"
(315 mm)
P1 P2
Ø=2.52" (64 mm)
Cable max.
1.97 x 5.31" (50 x 135 mm) or
2.52 x 3.94" (64 x 100 mm)
Bus Bar max.
Red Black
S2S1
ELECTRICAL SPECIFICATIONS
Current Range:
1 AAC to 1000 AAC continuous cycle
1 AAC to 2000 AAC continuous cycle
1 AAC to 2400 AAC continuous cycle for the
full temperature range
(3000 A, if temperature <95 °F or <35 °C)
Transformation Ratio:
1000:5, 2000:5, 3000:5
Output Signal:
5 mAAC/AAC (5 A at 1000 A)
2.5 mAAC/AAC (5 A at 2000 A)
1.666 mAAC/AAC (5 A at 3000 A)
Accuracy and Phase Shift:*
1000 A RANGE
Primary Current 50 A 200 A 1000 A
Accuracy % 3 % 1.5 % 1 %
Phase shift 3 ° 1.5 ° 1 °
Load Impedance: ≤0.4 Ω
Overload: 1200 A for 10 min
Ampere-Second Product: 15 A·s
Accuracy: Per IEC 185-26-27
Class 1 (2.5 V·A) from 48 Hz to 1000 Hz
Frequency Range:
30 Hz to 5 kHz; current derating above
1 kHz for continuous use.
2000 A RANGE
Primary Current 100 A 400 A 2000 A
Accuracy % 1.5 % 0.75 % 0.5 %
Phase shift 1.5 ° 0.75 ° 0.5 °
Load Impedance: ≤0.4 Ω
Overload: 2400 A for 10 min
Ampere-Second Product: 50 A·s
Accuracy: Per IEC 185-26-27
Class 0.5 (5 V·A) from 48 Hz to 1000 Hz

3000 A RANGE
Primary Current 150 A 600 A 3000 A
Accuracy % 1.5 % 0.75 % 0.5 %
Phase shift 1.5 ° 0.75 ° 0.5 °
Load Impedance: ≤0.4 Ω
Overload: 3600 A for 10 min
Ampere-Second Product: 80 A·s
Accuracy: Per IEC 185-26-27
Class 0.5 (5 V·A) from 48 Hz to 1000 Hz
(*Reference conditions: 23 °C ± 3 K, 20 %RH to
85 %RH, 45 Hz to 65 Hz, external magnetic eld
<40 A/m, no DC component, no external current
carrying conductor, test sample centered.)
Frequency Range: 30 Hz to 1500 Hz; cur-
rent derating above 1500 Hz for continuous
use
Load Impedance: ≤2 Ω
Working Voltage: 600 VAC
Common Mode Voltage: 600 VAC
Inuence of Adjacent Conductor:
<0.005 A/AAC
Inuence of Conductor in Jaw Opening:
1.5 % ± 0.2 A on 1000:5 range
1 % ± 0.2 A on 2000:5 range
1 % ± 0.2 A on 3000:5 range
MECHANICAL SPECIFICATIONS
Operating Temperature:
14 °F to 122 °F (-10 °C to 50 °C)
Storage Temperature:
-13 °F to 176 °F (-25 °C to 80 °C)
Inuence of Temperature:
<0.1 % per 10 K
Jaw Opening: 3.54 in (90 mm)
Maximum Conductor Size:
Cable: 2.52 in Ø max (64 mm)
Bus bar: 1.97 in x 5.31 in (50 mm x 135 mm)
2.52 in x 3.94 in (64 mm x 100 mm)
Envelope Protection:
IP 20 (IEC 529)
Drop Test:
1 m (IEC 68-2-27)
Mechanical Shock:
100 g (IEC 68-2-27)
Vibration:
10/55/10 Hz, 0.15 mm (IEC 68-2-6)
Polycarbonate Material:
Handles: 10 % berglass charged
polycarbonate UL 94 V0
Jaws: ABS UL 94 V2
Dimensions:
4.72 in x 12.40 in x 1.89 in
(120 mm x 315 mm x 48 mm)
Weight:
2.65 lb (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:
600 V CAT III, Pollution: 2
ORDERING INFORMATION
Current Probe JM865A........ Cat. #2110.88
Accessories:
Adapter - Banana (Female) to BNC (Male)
(XM-BB) (600 V CAT III) ........ Cat. #2118.46
Lead - set of 2, 5 ft (red/black) PVC
with 4 mm ST/ST plugs .........Cat. #5100.07
OPERATION
Please ensure that you have read and fully understand the WARNING section on page 1.
Making Measurements with the AC Current Probe Model JM865A
■Connect the black and red terminals to the Ampere AC range of your DMM or current
measuring instrument. Select the appropriate current range. If the current magnitude
is unknown, select the highest range (3000 AAC / 5 AAC) on the switch probe inside
the handle. Clamp the probe around the conductor with the arrow pointed toward the
load. Select the lower range until you obtain the best resolution. Read the value display
on the DMM and multiply it by the range selected. If the reading equals 2.59 A on the
1000/5 range, the current owing through the probe is 518 AAC (2.59 A x 200).
■For the 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 factory replacement parts.
■To avoid electrical shock, do not attempt to perform any servicing unless you are
qualied to do so.
■To avoid electrical shock and/or damage to the instrument, do not get water or other
foreign agents into the probe.
Cleaning:
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. To clean the probe jaws, use very ne
sand paper (ne 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
Phone: [phone] (Ext. 360)
[phone] (Ext. 360)
Fax: [phone] or [phone]
E-mail: [email protected]
(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:
Chauvin Arnoux®, Inc. d.b.a. AEMC®Instruments
15 Faraday Drive
Dover, NH 03820 USA
Phone: [phone] (Ext. 351)
Fax: [phone]
E-mail: [email protected]
LIMITED WARRANTY
The current probe 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 that it was purchased from. 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.
99-MAN 100125.v9 08/22