AEMC MA114 User manual

ENGLISH
User Manual
■
AC CURRENT PROBE
MA114

2AC Current Probe Model MA114
Statement of Compliance
Chauvin Arnoux®, Inc. d.b.a. AEMC®Instruments
certifies that this instrument has been calibrated using
standards and instruments traceable to international
standards.
We guarantee that at the time of shipping your
instrument has met its published specifications.
An N.I.S.T. traceable certificate may be requested at
the time of purchase, or obtained by returning the
instrument to our repair and calibration facility, for a
nominal charge.
The recommended calibration interval for this
instrument is 12 months and begins on the date of
receipt by the customer. For recalibration, please use
our calibration services. Refer to our repair and
calibration section at www.aemc.com.
Serial #:
Catalog #: 2153.41
Model #: MA114
Please fill in the appropriate date as indicated:
Date Received:
Date Calibration Due:
Chauvin Arnoux®, Inc.
d.b.a AEMC®Instruments
www.aemc.com

AC Current Probe Model MA114 3
CONTENTS
PRECAUTIONS FOR USE .................................................................................. 5
RECEIVING YOUR SHIPMENT ...................................................................... 6
1. DESCRIPTION................................................................................................. 7
1.1. GENERAL ................................................................................................ 7
1.2. MINIFLEX®MODEL MA114 ..................................................................... 7
2. OPERATION .................................................................................................... 8
2.1. MEASUREMENT PRINCIPLE.................................................................. 8
2.2. OPERATION ............................................................................................ 8
2.2.1. CONNECTING THE MA114 ............................................................. 8
2.2.2. DISCONNECTING THE MA114 ..................................................... 10
2.2.3. AUTOMATIC POWER OFF ............................................................ 10
2.3. EXTERNAL POWER (OPTIONAL)......................................................... 10
3. SPECIFICATIONS ......................................................................................... 12
3.1. REFERENCE CONDITIONS .................................................................. 12
3.2. ELECTRICAL CHARACTERISTICS....................................................... 12
3.3. VARIATIONS IN THE RANGE OF USE ................................................. 13
3.4. TYPICAL FREQUENCY RESPONSE GRAPHS .................................... 13
3.4.1. AMPLITUDE ERROR ..................................................................... 13
3.4.2. PHASE ERROR.............................................................................. 13
3.5. TYPICAL FREQUENCY RESPONSE GRAPHS .................................... 14
3.6. POWER SUPPLY................................................................................... 14
3.6.1. BATTERIES .................................................................................... 14
3.6.2. EXTERNAL POWER (OPTIONAL) ................................................. 14
3.7. ENVIRONMENTAL CONDITIONS ......................................................... 15
3.8. PHYSICAL SPECIFICATIONS ............................................................... 15
3.9. CONFORMITY TO INTERNATIONAL STANDARDS............................. 16
3.10. ELECTROMAGNETIC COMPATIBILITY (CEM) .................................. 16
4. MAINTENANCE ............................................................................................. 17
4.1. CLEANING ............................................................................................. 17
4.2. BATTERY REPLACEMENT ................................................................... 17
WARRANTY ...................................................................................................... 18

4AC Current Probe Model MA114
Thank you for purchasing the AEMC MiniFlex®MA114 flexible current sensor.
For best results from your instrument:
read these operating instructions carefully
comply with the precautions for use
WARNING, risk of DANGER! The operator must refer to these
instructions whenever this danger symbol appears.
CAUTION! Risk of electric shock. The voltage at the parts marked
with this symbol may be dangerous.
Equipment protected by double insulation.
Useful information or tip.
Application or withdrawal not authorized on conductors carrying
dangerous voltages. Type B current sensor as per IEC 61010-2-
032.
Battery.
Direction of current.
Recyclable in accordance with standard ISO14040.
Conforms with European directives and with regulations covering
EMC.
In the European Union, the product must undergo selective disposal
for the recycling of electric and electronic material, in compliance with
Directive WEEE 2002/96/EC.
Definition of Measurement Categories (CAT)
CAT IV Measurement category IV corresponds to measurements taken at the
source of low-voltage installations.
Examples: power feeders, counters and protection devices.
CAT III Measurement category III corresponds to measurements on building
installations.
Examples: distribution panel, circuit-breakers, machines or fixed
industrial devices.
CAT II Measurement category II corresponds to measurements taken on
circuits directly connected to low-voltageinstallations.
Examples: power supply to domestic electrical appliances and portable
tools.

AC Current Probe Model MA114 5
PRECAUTIONS FOR USE
The MA114 is protected against voltages up to 600 V with respect to earth in
measurement category IV, or 1000 V in category III. The protection assured by
the current sensor can be compromised if it is used in a way that is not
recommended by the manufacturer.
Comply with the rated maximum voltage and current and the
measurement category.
Never exceed the protection limits stated in the specifications.
Comply with the conditions of use (temperature, humidity, altitude,
degree of pollution and location of use).
Do not use the MA114 if it is open, damaged, or incorrectly reassembled.
Before each use, check the integrity of the insulation on the coil, the
leads, and the electronic unit.
The application or withdrawal of the sensor on uninsulated conductors at
dangerous voltages requires the use of suitable safety equipment.
If it is not possible to power down the installation, follow safe operating
procedures and usesuitable means of protection.
All troubleshooting and metrological checks must be done by competent,
accredited personnel.

6AC Current Probe Model MA114
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. Save the
damaged packing container to substantiate your claim.
Ordering Information
MiniFlex®14” Model MA114 (3A/1V/A, 30A/100mV/A,
300A/10mV/A, 3000A/1mV/A)...................................................... Cat #2153.41
Includes two 1.5 V batteries (AA or LR6), multilingual safety data sheet, user
manual, and verification certificate.

AC Current Probe Model MA114 7
1. INTRODUCTION
1.1. GENERAL
MiniFlex®sensors consist of a flexible coil connected by a shielded lead to a
housing containing the signal processing electronics, powered by batteries. The
flexibility of the sensors allows clamping of the conductor to be measured,
whatever its shape (cable, bar, strand, etc.) and accessibility. The snap-locking
coil opening/closing button allows handling while wearing protective gloves. The
electronic unit can be connected to the mVAC or VAC input of a measuring
instrument having an input impedance of ≥ 1 MΩ.
1.2. MINIFLEX®MODEL MA114
MiniFlex®MA114 single‑phase 14” (35 cm) sensor converts alternating currents
ranging from 3 to 3000 A into proportional AC voltages.
Flexible coil
Banana plugs (2), 0.16”
(4 mm) diameter
Sensor opening
button
OL indicator (red):
indicates reading
exceeds measurement
range
Shielded cable
Switch to activate
instrument and
select sensitivity
Auto Power OFF
indicator (orange): auto
OFF feature activated
Auto Power OFF
button deactivates
auto OFF feature
ON indicator (green):
Blinking: running on
battery power
Steady: running on
external power
Type B Micro-USB
port to connect
optional 5 V external
power supply
Connecting cable
connecting the
electronic unit to a
display instrument

8AC Current Probe Model MA114
2. OPERATION
2.1. MEASUREMENT PRINCIPLE
The MA114 sensor is based on the Rogowski coil principle. This provides:
very good linearity and no saturation effect (and therefore no
overheating)
wide measurement dynamic, up to several kA
insensitivity to DC (measurement of the AC component of any AC + DC
signal)
light weight (no magnetic circuit)
2.2. OPERATION
2.2.1. CONNECTING THE MA114
1. Connect the output leads to a measuring instrument (for example a
multimeter) having an input impedance ≥1 MΩ. Turn it ON and set to
AC voltage measurement.

AC Current Probe Model MA114 9
2. Turn the instrument ON by turning the rotary switch to any position. The
green ON indicator starts blinking.
3. Press on the yellow sensor opening button to open the flexible coil.
4. Place the open sensor around conductor to be measured (only one
conductor in the sensor at a time). Close the coil; an audible click
sounds as the coil is closed.
Use individual protection equipment when measuring an
uninsulated conductor carrying a high voltage.
To optimize measurement, center the conductor in the coil.
5. Set the switch to the range providing the best sensitivity and ensure the
red OL indicator is off. (OL indicates saturation of the electronics,
resulting in a measurement error.)

10 AC Current Probe Model MA114
6. Read the measurement on the multimeter, applying the reading
coefficient indicated on the label on the electronic unit corresponding to
the setting of the switch.
3A~ range: 1000 mV~/A~
30 A~ range: 100 mV~/A~
300 A~ range: 10 mV~/A~
3000 A~ range: 1 mV~/A~
7. Multiply the reading by the coefficient.
For example, a reading of 1 V on the measuring instrument corresponds
to a current of
1V
10 mV/A= 100 A in the 300 A~ range.
2.2.2. DISCONNECTING THE MA114
Remove the flexible coil from the conductor, set the switch to OFF, and
disconnect the electronic unit from the multimeter.
2.2.3. AUTOMATIC POWER OFF
When the MA114 starts up, it operates for 10 minutes, then automatically
switches itself to sleep mode to save battery life. While this feature is activated,
the orange Auto Power Off indicator is lit.
To override automatic power off:
1. With the MA114 OFF, press and hold down the Auto Power Off button
while turning the sensor ON by turning the switch to any measurement
setting.
2. Continue to hold down Auto Power Off for longer than 2 seconds. The
orange Auto Power Off indicator remains OFF, indicating this feature is
disabled.
2.3. EXTERNAL POWER (OPTIONAL)
For long‑duration measurements, you can connect the MA114’s electronic unit to
line power. Remove the protection from the type B micro‑USB connector, then
connect the lead. You can use any line/micro‑USB adapter that delivers 100 mA
or more.
The green On indicator remains lit but its brightness varies to indicate the
batteries are functional. While external power supply is present, automatic power
off is disabled. If external power is disconnected, the MA114 switches to battery
power and automatic power off takes effect after 10 minutes.