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