AEMC INSTRUMENTS MN352 AC Current Probe User Manual
- June 17, 2024
- AEMC INSTRUMENTS
Table of Contents
AEMC INSTRUMENTS MN352 AC Current Probe
DESCRIPTION
The MN352/353 (Catalog #2116.26 and #2116.27) are the latest in compact AC probes. Designed to meet the most stringent demands in industry and electrical contracting, they also meet the latest safety and performance standards. The probes have a measurement range up to 240 Arms which makes them perfect tools for measurements with DMMs, recorders, power, and harmonic meters. The Models MN352/MN353 are compatible with any AC voltmeter, multimeter, or other voltage measurement instrument that is capable of displaying 10mV of output per amp of measured current, an accuracy of 0.75% or better, and an input impedance of ≥ 1 Ms.
WARNING
The safety warnings are provided to ensure the safety of personnel and the
proper operation of the instrument. Read the instructions completely.
- Use caution on any circuit: potentially high voltages and currents may be present and may pose a shock hazard.
- Do not use the probe if damaged. Always connect the current probe to the measuring device before it is connected to the conductor
- Do not use on non-insulated conductors with a potential to ground greater than 600V CAT III pollution 2. Use extreme caution when clamping around bare conductors or bus bars.
- Before each use, inspect the probe; look for cracks in housing or output cable insulation.
- Do not use clamps in wet environments or in locations where hazardous gases exist.
- Do not use the probe anywhere beyond the tactile barrier.
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.
CONNECTION
ELECTRICAL SPECIFICATIONS
- Nominal Range: 150A
- Measurement Range: 0.1 to 150A
- Transformation Ratio: Voltage output
- Output Signal: 10mV/A
Accuracy and Phase Shift
Accuracy:
- 0.1 to 1A: 3% Reading ± 200µV
- 1 to 20A: 2% Reading ± 200µV
- 20 to 80A: 1% Reading
- 80 to 150A: 3% Reading
- 150 to 200A: 7% Reading
Phase Shift
- 0.1 to 1A: Not Specified
- 1 to 20A: 3°
- 20 to 80A: 2°
- 80 to 150A: 3°
- 150 to 200A: 4°
(Reference conditions: 18°C to 28°C, 20 to 75% RH, external magnetic field <40 A/m, 48 to 65 Hz sine wave, distortion factor less than 1%, no DC component, no external current carrying conductor, test sample centered.) Load impedance > 1 MΩ.
- Frequency Range: 40 to 10kHz
- Limit Operating Conditions:
- 200A permanently to 1kHz;
- Derating above 3kHz: 200A x (1/0.333F), F in kHz
- Crest Factor: 3 @ 150A peak max with an error (due to CF) of 3%
- Overload: 240A for 10 min ON, 30 min OFF
- Working Voltage: 600Vrms
- Common Mode Voltage: 600Vrms
- Influence of Adjacent Conductor: < 15mA/A at 50 Hz
- Influence of DC on AC signal: DC Current < 10A, < 10%
- Influence of Conductor Position in Jaw: 0.5% of mV output @ 50/60 Hz
- Influence of Frequency:
- 40 Hz to 1 kHz: 5% of mV output
- 1 kHz to 10 kHz: 15% of mV output
- Influence of Load:
- < 3% of mA output from 40 Hz to 1 kHz
- < 12% of mA output from 1 kHz to 10 kHz
- Influence of Temperature:
- 200 ppm/°K, or 0.2% of mV output per 10°K
- Influence of Humidity (10 – 90% RH):
- 0.2% of mV output per 10°K @ 18°C to 28°C
MECHANICAL SPECIFICATIONS
-
Operating Temperature:
- 14° to 131°F (-10° to +55°C)
-
Storage Temperature:
- -40° to 158°F (-40° to +70°C)
-
Operating Relative Humidity:
- 10-35°C 85% RH (without roll-off above 35°C)
-
Maximum Cable Diameter:
- One Ø 0.78” (20mm), bus bar 20 x 5mm
-
Case Protection:
- IP 40 (IEC 529)
-
Drop Test:
- Test per IEC 68-2-32: 1.0m drop on 38 mm of Oak on concrete.
-
Mechanical Shock:
- Test per IEC 68-2-27
-
Vibration:
- Test per IEC 68-2-6
-
Dimensions:
5.47 x 2.00 x 1.18″ (139 x 51 x 30mm) -
Weight:
- 180 g (6.5 oz)
-
Polycarbonate Material:
-
Jaws: Polycarbonate with 10% fiberglass charge,
- Red UL 94 V0
-
Case: Polycarbonate 920A Gray
-
Opening Operations – Life:
-
50,000
-
-
Output:
-
MN352 : Two standard safety banana jacks (4mm)
-
MN353: Double/reinforced insulated 5 ft (1.5m) lead with safety 4mm banana plug
SAFETY SPECIFICATIONS
-
Electrical:
Double insulation or reinforced insulation between the primary or secondary and the outer case of the handle conforms to IEC 1010-2-32. -
Common Mode Voltage:
600V Category III Pollution Degree 2 -
Dielectric Strength:
5550 V, 50/60 Hz between primary, secondary, and the outer case of the handle -
Electromagnetic Compatibility:
- EN 50081-1 Class B
- EN 50082-2 Electrostatic discharge
- IEC 1000-4-2
- Radiated field IEC 1000-4-3
- Fast transients IEC 1000-4-4
- Magnetic field at 50/60 Hz IEC 1000-4-8
ORDERING INFORMATION
AC Current Probe MN352 .. …….. Cat #2116.26
AC Current Probe MN353 ………. Cat #2116.27
Accessories
-
Leads, set of 2, 5 ft safety
(1000V) for Model MN352 ………… Cat #2111.29 -
Banana plug adapter
(to non-recessed plug) ……………. Cat #1017.45
OPERATION
- Please make sure that you have already read and fully understand the WARNING section on..
Making Measurements with the AC Current Probe Model MN352/MN353
-
Connect the black lead of the current probe to “common” and the red lead to the AC voltage input on your DMM or other voltage-measuring instrument. The AC probe has an output of 10mV/A. This means that for 200AAC in a conductor around which the probe is clamped, 2VAC will come out of the probe lead to your DMM or instrument. Select the range that corresponds to the measured current. If the current magnitude is unknown, start with the highest range and work down until the appropriate range and resolution are reached. Clamp the probe around the conductor. Take the reading on the meter and multiply it by 100 to obtain the measured current (e.g, 160mV reading = 160 x 100 = 16,000mA or 16A)
-
For best accuracy, 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 errors in
readings. To clean the probe jaws, use very fine sandpaper (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
- 800-945-2362 (Ext. 360)
- 603-749-6434 (Ext. 360)
- [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:
LIMITED WARRANTY
- The current probe is warranted to the owner for 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, or abused or if the defect is related to service not performed by AEMC® Instruments.
- Full warranty coverage and product registration are available on our website at: www.aemc.com/warranty.html.
- Please print the online Warranty Coverage Information for your records.
FAQ
- Q: What are the measurement categories for this AC Current Probe?
- A: The measurement categories for this AC Current Probe are CAT II, CAT III, and CAT IV. CAT II is for measurements performed on circuits directly connected to the electrical distribution system (e.g., household appliances or portable tools). CAT III is for measurements performed in the building installation at the distribution level (e.g., on hardwired equipment in fixed installation and circuit breakers). CAT IV is for measurements performed at the primary electrical supply.
- Q: Where can I find the ordering information for this product?
- A: The ordering information for this AC Current Probe can be found in the “Ordering Information” section of the user manual. The model numbers and corresponding catalog numbers are provided for easy reference.