Aemc instruments JM800A User Manual

AC Current Probe
Model JM800A

User Manual

DESCRIPTION

The JM800A (Catalog #2110.79) 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 JM800A offers a 5 ft. lead
with safety 4mm banana plug.

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.

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.

PACKAGING

The AC Current Probe JM800A is shipped with this instruction manual and a product warranty and
registration card. You can now register online at www.aemc.com

INSTRUMENT COMPATIBILITY

The Model JM800A is compatible with any AC Ammeter, multimeter, or other current measuring
instrument with an input impedance lower than 5Ω. To achieve the stated accuracy, use the JM800A with
the DMM having an accuracy of 0.75%.

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.

12.40"

(315 mm)

P1 P2

4.72"

(120 mm)

ELECTRICAL SPECIFICATIONS

Current Range:

1 to 1000 A AC, continuous cycle for
the full temperature range

Transformation Ratio:

1000:1

Output Signal:

1 mA AC/A AC (1 A at 1000 A)

Black

S2

S1

Red

1.89"

(48 mm)

Accuracy and Phase Shift*:

Primary current 50A 200A 1000A

Accuracy % 2% 1.5% 1%

Phase shift 2° 1.5° 1°

*(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 0.5Ω.