Aemc instruments JM810A User Manual

AC Current Probe
Model JM810A

User Manual

DESCRIPTION

The JM810A (Catalog #2110.80) 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 JM810A is compatible with
any AC ammeter, multimeter, or other current measuring instrument with an input impedance lower than
1. To achieve the stated accuracy, use the JM810A with the DMM having an accuracy of 0.75%.

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 600V. 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.

DEFINITION OF MEASUREMENT CATEGORIES
Cat. II: For measurements performed on circuits directly connected to the electrical distribution 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 primary

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.

4.72"

(120 mm)

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.

1.89"

(48 mm)

P1 P2

12.40"

(315 mm)

S2

S1

Black

Red

ELECTRICAL SPECIFICATIONS

Current Range:

1 to 2000A
the full temperature range

Transformation Ratio:

2000:2

Output Signal:

1mA AC/A AC (2A at 1000A)

AC, continuous cycle for

Accuracy and Phase Shift*:

Primary current 100A 400A 2000A
Accuracy % 2% 1% 0.5%
Phase shift 1.5° 0.75° 0.5°

*(Reference conditions: 23°C ±3°C, 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: 2400A for 10mn
Accuracy: Per IEC 185-26-27

Class 0.5 from 48 to 1000Hz

Frequency Range:

30 Hz to 5 kHz; current derating above
1kHz for continuous use.

Load Impedance: ≤ 1
Working Voltage: 600V
Common Mode Voltage: 600V
Influence of Adjacent Conductor:

0.005A / A

Influence of Conductor in Jaw Opening:

1% ± 0.1A of reading

AC

AC

AC

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" (90mm)
Maximum Conductor Size:

Cable: 2.52" Ø max. (64mm)
Bus bar: 1.97 x 5.31" (50 x 135mm)

2.52 x 3.94" (64 x 100mm)

Envelope Protection:

IP 20 (IEC 529)

Drop Test:

500mm (IEC 68-2-32)

Mechanical Shock:

100 g (IEC 68-2-27)

Vibration:

10/55/10 Hz, 0.15mm (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 48mm)

Weight:

2.65 lbs (1200 g)

Colors:

Dark gray handles with red jaws

Output:

5 ft (1.5m) lead with safety 4 mm banana plug

SAFETY SPECIFICATIONS

Electrical:

IEC 1010-2-32
600V max. common mode between output and
ground

ORDERING INFORMATION

Current Probe JM810A ................ Cat. #2110.80

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 JM810A

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

instrument. Select the appropriate current range (2A AC). Clamp the probe around the conductor to be
tested. If the reading is less than 200mA, 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 = 0.592A AC,
the current flowing through the probe is 0.592A x 1000 = 592A 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.

Chauvin Arnoux

®

, Inc. d.b.a. AEMC® Instruments

15 Faraday Drive  Dover, NH 03820 USA
[phone] (Ext. 360) • [phone] (Ext. 360) • [e-mail]

(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:

[phone] • [phone] • [e-mail]

LIMITED WARRANTY

The current probe is warranted 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 from whom it was purchased. 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

Please print the online Warranty Coverage Information for your records.

99-MAN 100116.v8 07/17