AEMC instruments MD305 Manuel utilisateur

AC Current Probe

Model MD305

User Manual

DESCRIPTION

The MD305 (Catalog #1201.36) is designed for use in industrial environments. The hook

shaped jaws enable the user to “pry” into or “hook” onto cables (will accept 2 x 500 MCM) or

smaller bus bars. This device is compatible with any AC Ammeter, multimeter, or other current

measurement instruments with an input impedence lower than 5Ω. To achieve this stated

accuracy, use the MD305 with an ammeter with an accuracy of 0.75% or better.

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; high voltages and currents may be present and may pose a shock hazard.

• Read the Safety Specications section prior to using the current probe. Never exceed the maximum

voltage ratings given.

• Safety is the respondibility 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 in overvoltage category III

(CAT III). Use extreme caution when clamping around bare conductors or bus bars.

INTERNATIONAL ELECTRICAL SYMBOLS

This symbol signies that the current probe is protected by double or reinforced

insulation. Use only factory-specied replacement parts when servicing the instrument.

This symbol signies CAUTION! and requests that the user refer to the user manual

before using the instrument.

This symbol signies that this is a type A current sensor and that application near and

removal from HAZARDOUS LIVE conductors is permitted.

DEFINITION OF MEASUREMENT CATEGORIES

CAT IV: For measurements performed at the primary electrical supply (<1000V), such as

primary overcurrent protection devices, ripple control units, or meters.

CAT III: For measurements performed in the building installation at the distribution level, such

as hardwired equipment in xed installation or circuit breakers.

CAT II: For measurements performed on circuits directly connected to the electrical

distribution system, such as measurements on household appliances or portable

tools.

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, le a

claim immediately with the carrier, and notify your distributor with a detailed description of any

damage immediately.

CURRENT PROBE - MD305 DRAWING

ELECTRICAL SPECIFICATIONS

Current Range:

1 to 600A AC

Transformation Ratio:

1000:1

Output Signal:

1mA AC/A AC

Overload:

700A for 10min

Accuracy*:

Primary

Current

25A 100A 250A;

500A

600A

Accuracy % 3% 1.5% 1% 2%

Phase Shi 3° 1.5° 1° 1°

600A for 20min max

(*Referenced conditions: 23°C ± 5°K, 20 to

75% RH, external magnetic eld < 40 A/m, no

DC component, no external current carrying

conductor, test sample centered.) 5Ω load.

Frequency Range:

40 to 1000Hz

(error: add 2% to ref.)

Load Impedence:

5Ω max non-inductive

Open Secondary Voltage:

Limited to 10V peak max

Working Voltage:

600Vrms

Common Mode Voltage:

600Vrms

Inuence of Adjacent Parallel Conductor:

<30mA/A at 50Hz

Inuence of Conductor in Jaw Opening:

<1%

Output:

Double insulated 5ft (1.5m) lead with safety

banana plugs

SAFETY SPECIFICATIONS

Electrical:

Double insulation or reinforced insulation be-

tween the primary or secondary and the outer

case of the handle conforms to

IEC 1010-2-32.

Common Mode Voltage:

600V CAT III, Pollution Degree 2

Electromagnetic Compatibility:

EN 50081-1 Class B

EN 50081-2 Electrostatic discharge

IEC 1000-4-2

Radiated eld IEC 1000-4-3

Fast transients IEC 1000-4-4

Magnetic eld at 50/60Hz IEC 1000-4-8

ORDERING INFORMATION

Current Probe MD305 ..............Cat #1201.36

Accessories:

Adapter – 4mm non-insulated for Safety

Leads..........................................Cat #1017.45

MECHANICAL SPECIFICATIONS

Operating Temperature:

-5° to 122°F (-15° to 50°C)

Storage Temperature:

-40° to 185°F (-40° to 85°C)

Inuence of Temperature:

< 0.1% per 10°K

Altitude:

Operating: 0 to 2000m

Non-operating: 0 to 12,000m

Jaw Opening:

1.3” (33mm)

Maximum Conductor Size:

1.18” (30mm)

Maximum Bus Bar Size:

1.48 x 0.20” (63 x 5mm)

Envelope Protection:

IP 20 (IEC 529)

Drop Test:

1.5m (IEC 68-2-32)

Mechanical Shock:

100g (IEC 68-2-27)

Vibration:

10/55/10Hz, 0.15mm

(IEC 68-2-6)

Polycarbonate Material:

Handles: 10% berglass charged

polycarbonate UL 94 V0

Dimensions:

2.6 x 7.68 x 1.34” (66 x 195 x 34mm)

Weight:

14.82 oz (420g)

Colors:

Dark gray handles

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 MD305

• 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 range). Clamp the

probe around the conductor with the arrow pointing toward the load. 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 the reading = 0.459A, the

current owing through the probe is 0.459A x 1000 = 495A AC.

• For best accuracy, avoid taking measurements in the proximity of other conductors if

possible. The other conductors may create noise that will a󰀨ect the accuracy of the

measurement.

Tips For Making Precise Measurements

• When using a current probe with a meter, please select the range that provides the best

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

• Make sure that the probe jaw mating surfaces are free from dust and contamination. It is

critical for power measurement. Contaminants cause air gaps between the jaws, which

increases the phase shift between primary and secondary.

MAINTENANCE

Warning

• For maintenance, use only original replacement parts.

• To avoid electrical shock, do not attempt to perform any service on the device unless you

are qualied to do so.

• To avoid electrical shock and/or damage to the instrument, do not allow water or other

foreign agents to come into contact with 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 ne

sand paper (ne 600) to avoid scratching the jaw, and 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: (800) 945-2362 (Ext. 360)

(603) 749-6434 (Ext. 360)

Fax: (603) 742-2346 or (603) 749-6309

E-mail: [email protected]

(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: (800) 343-1391 (Ext. 351)

Fax: (603) 742-2346

E-mail: [email protected]

LIMITED WARRANTY

The current probe is warrantied 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 that it was purchased from. 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/warranty.html.

Please print the online Warranty Coverage Information for your records.

99-MAN 100120.v11 11/21

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