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 “sq uared” jaws
permit multiple conductor or bus bar positioning. The current output makes it the perfect tool for
measurement with DMMs, rec orders, power and harm onic meters. Three ranges allo w you to obtain the
best resolution even on low current measurement. The Model JM865A is compatible with any AC
Ammeter, multimet er, or other cu rrent measuring i nstrument with an input imped ance lower than 2Ω. To
achieve the stated accuracy, use the JM865A with an Ammeter having an accuracy of 0.75%.

WARNING

These safety warnings are prov ided to ensure the safet y of personnel and pro per operatio n of the
instrument.

• Read the i nstruction ma nual completel y and follow all the safety info rmation before attempting
to use or service this instrument.

• Use caution on any circuit: Potentiall y h igh vol t age s 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.

• ALWA YS connect the curre nt probe to the di splay device be fore clamping t he probe onto t he
sample being tested.

• ALWA YS inspect the instrumen t, p ro be , pr obe ca bl e, an d ou tp ut te rm inal s pri or to use. Replace
any defective parts immediately.

• NEVER use the current probe on electrical conductors rated above 600V 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 cur rent prob e is protect ed by doubl e or reinfo rced ins ulation. Us e
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 ar oun d a nd rem oval
from HAZARDOUS LIVE conductors is permitted.

DEFINITION OF MEASUREMENT CATEGORIES
CAT II: For measurem ents performed on circ uits directly connecte d to the electrical distri bution 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 primar y

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.

Primary current

50A

200A

1000A

Accuracy %

3%

1.5%

1%

Phase shift

3°

1.5°

1°

A

Accuracy %

1.5%

0.75%

0.5%

Phase shift

1.5°

0.75°

0.5° A Accuracy %

1.5%

0.75%

0.5%

Phase shift

1.5°

0.75°

0.5°

ELECTRICAL SPECIFICATIONS

Current Range:

1 to 1000A AC continuous cycle
1 to 2000A AC continuous cycle
1 to 2400A AC continuous cycle for the full
temperature range.

(3000 A if temperature <35º C or 95º F)

Transformation Ratio:

1000:5, 2000:5 -3000:5

Output Signal:

5mA AC/A AC (5A at 1000A)

2.5mA AC/A AC (5A at 2000A)

1.666mA AC/A AC (5A at 3000A)

Accuracy and Phase Shift*:
1000A RANGE

Load Impedance: 0 .1Ω

Overload: 1200A for 10 mn
Ampere Second Product: 15 A.s

Accuracy: Per IEC 185-26-27

Accuracy %

1.5%

0.75%

0.5%

Phase shift

1.5°

0.75°

0.5°

Accuracy %

1.5%

0.75%

0.5%

Phase shift

1.5°

0.75°

0.5°

Class 1 (2.5VA) from 48 to 1000 Hz

2000A RANGE

Primary current

Load Impedance: 0 .2Ω
Overload: 2400A for 10 mn
Ampere Second Product: 50 A.s
Accuracy: Per IEC 185-26-27

Class 0.5 (5 VA) from 48 to 1000 Hz

3000A RANGE

Primary current

Overload: 3600A for 10 mn
Ampere Second Product: 80 A.s
Accuracy: Per IEC 185-26-27

Class 0.5 (10VA) from 48 to 1000 Hz
(*Reference conditions: 23°C±3°K, 20 to 85%

RH, 45 to 65 Hz, external magnetic field < 40
A/m, no DC component, no external current
carrying conductor, test sample centered.)

Frequency Range : 30 to 1500 Hz; current
derating above 1500H z for cont in uo us use

Load Impedance: ≤ 2Ω
Working Voltage: 600V AC
Common Mode Voltage: 600V AC
Influence of Ad jac ent Conductor:

< 0.005A/A AC

Influence of Conductor in Jaw Opening:

1.5% ± 0.2A on 1000:5 range
1% ± 0.2A on 2000:5 range
1% ± 0.2A on 3000:5 range

100A 400A 2000A

150A 600A 3000A

HANICAL SPECIFICATIONS

Operating Temp: 14° to 122°F (-10° to 50°C)
Storage Temp: -13° to 17 6° 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" Ø 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: 1 m (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 1.9" (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 (4mm)

SAFETY SPECIFICATIONS

E

lectrical:

Double insulation or reinforced insulation between
primary or secondary and outer case of handle
upon IEC 1010-2-32

Common Mode Voltage:

600V CAT III, Pollution: 2

ORDERING INFORMATION

Current Probe JM865A.................... Cat #2110.88

Accessories:

Lead, set of 2, 5ft Safety Leads

(1000V CAT IV) .................................. Cat#2152.24

Adapter BNC (Male) –Banana (Female) (XM-BB)

(600V CAT III)..................................... Cat#2118.46

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 JM865A

• Connect the black and red terminals to the Ampere AC range of your DMM or current measuring

instrument. Sel ect the ap propriate c urrent ra nge.If the current m agnitude i s unkno wn, select th e highest
range (3000 A AC / 5 A AC) on the s witch pro be locat ed insid e the ha ndle. Cl amp the p robe ar ound the
conductor to be tested, with the arro w pointed dd toward the l oad. Sel ect the lo wer range until you obtain
the best resolution. R ead the val ue dis play on th e DMM and m ultiply it b y the range s elected. (If readi ng
= 2.59 A on the 1000/5 range, the current flowing through the probe is 2.59 A x 200 = 518 A AC).

• For best acc urac y: care full y cent er th e condu ctor i nside t he probe j aw, av oid if possi ble, the pr oximi ty of

other conductors which may create noise.

Tips for Making Precise Measurements

• W hen using a current probe with a meter, it is im portant to select the range that provides the best

resolution. Failure to do this may result in measurement errors.

• Make sure that probe jaw mati ng surfaces ar e free of dust and c ontamination. Co ntaminants ca use air

gaps between t he ja ws, inc reas ing t he phase shift bet ween prim ary a nd sec o ndar y. It i s ver y criti cal 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.

Cleaning

To ensure optimum p erforma nce, it is i mportant t o keep t he probe ja w mating surfaces cl ean at all tim es.
Failure to do so ma y result in error i n readings.To cl ean the probe j aws, use very fi ne sand paper (fi 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 whe n your instrument arriv es, it will be tracked an d p rocessed promptl y. Ple ase w rit e t h e CS A#
on the outside of the shipping container.

Chauvin Arnoux

5 Faraday Drive • Dover, NH 03820 USA

1

®

, Inc. d.b.a. AEMC® Instruments

[phone] (Ext. 360) • (60 3) 74 9-6434 (Ext. 360) • [e-mail]

(Or contact your authori zed di stributor)

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:

[phone] • [phone] • [e-mail]

LIMITED WARRANTY

The cu rrent prob e is warranted to t he owner f or a period of two years from the date of origi nal purch ase
against defects in manufacture. This limited warranty is given by AEMC
distributor from whom it was pu rchase d. This warranty is v oid if the u nit has been tamp ered wit h, abused
or if the defect is related to service not performed by AEMC

®

Instruments.

®

Instruments, not by the

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.v7 03/17