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.

Overload: 1200 A permanent;
1500 A for 5 mn

Accuracy: Per IEC 185-26-27
Class 1 from 48 to 1000 Hz

Frequency Range:

30 Hz to 5 kHz

Load Impedance: ≤ 5Ω
Working Voltage: 600 V AC
Common Mode Voltage: 600 V AC
Influence of Adjacent Conductor:

0.005 A / A AC

Influence of Conductor in Jaw Opening:

1% ± 0.1 A 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. (64 mm)
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. (1.5 m) lead with safety 4 mm banana plug

SAFETY SPECIFICATIONS

Electrical:

- IEC 348

- 4 kV 50/60 Hz dielectric for 1 mn

- 600 V max. common mode between output
and ground

ORDERING INFORMATION

Current Probe JM800A................Cat #2110.79

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 JM800A

• Connect the black and red terminals to the Ampere AC range of your DMM or current measuring
instrument. Select the appropriate current range (2 A AC). Clamp the probe around the conductor to be
tested. If the reading is less than 200 mA, select the lower range until you obtain the best resolution.
Read the value display on the DMM and multiply it by the probe ratio (1000/1). (If reading = 0.592 A
AC, the current flowing through the probe is 0.592 A x 1000 = 592 A AC).

• 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 factory 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 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 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: [phone] (Ext. 360)
[phone] (Ext. 360)
Fax: [phone] or [phone]

[e-mail]
(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:

[phone] • [phone] • Fax [phone]

Chauvin Arnoux

®

, Inc. d.b.a. AEMC® Instruments
[e-mail]
www.aemc.com

99-MAN 100117.v5 05/06