AEMC 203 User manual

203
CLAMP-ON METER
User Manual
ENGLISH

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CONTENTS
RECEIVING YOUR SHIPMENT........................................................................... 7
ORDERING INFORMATION................................................................................ 7
1PRESENTATION .......................................................................................... 8
1.1 ROTARY SWITCH......................................................................................... 9
1.2 FUNCTION BUTTONS ................................................................................ 10
1.3 DISPLAY ...................................................................................................... 11
1.3.1 Display Symbols ........................................................................... 11
1.3.2 Measurement Capacity Exceeded (OL) ........................................ 12
1.4 TERMINALS................................................................................................. 12
2BUTTONS................................................................................................... 13
2.1 BUTTON............................................................................................... 13
2.2 (YELLOW) BUTTON (SECOND FUNCTION) ............................................ 14
2.3 BUTTON ............................................................................................. 14
2.4 BUTTON ........................................................................................... 15
2.4.1 Normal Mode ................................................................................ 15
2.4.2 The MAX/MIN Mode + Activation of the HOLD Mode ................... 16
2.4.3 Access to the True Inrush®Mode ( set switch to ) ........ 16
2.5 BUTTON ............................................................................................. 17
2.5.1 Normal Mode ................................................................................ 17
2.5.2 The Hz Function + Activation of the HOLD Mode ......................... 17
2.6 BUTTON ........................................................................................... 18
3USE............................................................................................................. 19
3.1 INSTALLING THE BATTERY ...................................................................... 19
3.2TURNING THE CLAMP-ON METER ON .................................................... 19
3.3 TURNING THE CLAMP-ON METER OFF .................................................. 19
3.4 CONFIGURATION....................................................................................... 20
3.4.1 Configuring the Maximum Resistance for Continuity .................... 20
3.4.2 Auto Power OFF ........................................................................... 20
3.4.3 Configuring the Current Threshold for True InRush®Measurement20
3.4.4 Changing the Default Temperature Unit ....................................... 21
3.4.5 Configuring the Adapter Function Scale Factor ............................ 21
3.4.6 Default Configuration .................................................................... 22
3.5 VOLTAGE MEASUREMENT (V)................................................................. 22
3.6 CONTINUITY TEST ............................................................................... 23
3.6.1 Lead Resistance Compensation ................................................... 23
3.7 RESISTANCE MEASUREMENT ................................................................ 24
3.8 DIODE TEST ......................................................................................... 24
3.9 CURRENT MEASUREMENT (A) ................................................................ 25
3.9.1 AC Measurement .......................................................................... 25
3.9.2 DC Measurement.......................................................................... 26

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3.10 STARTING CURRENT OR OVERCURRENT (TRUE INRUSH®)
MEASUREMENT .................................................................................................... 27
3.11 FREQUENCY MEASUREMENT (HZ)......................................................... 27
3.11.1 Frequency Measurement (V) ........................................................ 27
3.11.2 Frequency Measurement (A) ........................................................ 28
3.12 TEMPERATURE MEASUREMENT............................................................ 29
3.12.1 Measurement without External Sensor ......................................... 29
3.12.2 Measurement with External Sensor .............................................. 29
3.13 ADAPTER FUNCTION MEASUREMENT................................................... 30
4SPECIFICATIONS ...................................................................................... 31
4.1 REFERENCE CONDITIONS....................................................................... 31
4.2 SPECIFICATIONS UNDER THE REFERENCE CONDITIONS ................. 31
4.2.1 DC Voltage Measurement............................................................. 31
4.2.2 AC Voltage Measurement ............................................................. 32
4.2.3 DC Current Measurement ............................................................. 32
4.2.4 AC Current Measurement ............................................................. 33
4.2.5 True Inrush®Measurement ........................................................... 33
4.2.6 Continuity Measurement ............................................................... 33
4.2.7 Resistance Measurement ............................................................. 34
4.2.8 Diode test...................................................................................... 34
4.2.9 Frequency Measurements ............................................................ 34
4.2.10 Temperature Measurement........................................................... 35
4.2.11 Adapter Function Measurement.................................................... 36
4.3 ENVIRONMENTAL CONDITIONS.............................................................. 37
4.4 MECHANICAL SPECIFICATIONS.............................................................. 37
4.5 POWER SUPPLY ........................................................................................ 37
4.6 COMPLIANCE WITH INTERNATIONAL STANDARDS............................. 37
4.7 ENVIRONMENTAL VARIATIONS............................................................... 38
5MAINTENANCE.......................................................................................... 39
5.1 WARNING.................................................................................................... 39
5.2 CLEANING................................................................................................... 39
5.3 REPLACEMENT OF THE BATTERY ........................................................... 39
6REPAIR AND CALIBRATION .................................................................... 40
7TECHNICAL AND SALES ASSISTANCE .................................................. 40
8LIMITED WARRANTY ................................................................................ 41
9WARRANTY REPAIRS .............................................................................. 41

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Thank you for purchasing a Model 203 Clamp-on Meter.
For best results from your instrument and for your safety, read the enclosed
operating instructions carefully and comply with the precautions for use. These
products must be only used by qualified and trained users.
Meanings of the symbols used on the device
CAUTION - Risk of Danger! Indicates a WARNING and that the operator
must refer to the user manual for instructions before operating the
instrument in all cases where this symbol is marked.
Risk of electric shock. The voltage at the parts marked with this symbol
may be dangerous.
Refers to a type A current sensor. This symbol signifies that application
around and removal from HAZARDOUS LIVE conductors is permitted.
9V battery
The CE marking indicates compliance with European directives
Double insulation or reinforced insulation
In the European Union, this product is subject to a separate collection
system for recycling electrical and electronic components In accordance
with directive WEEE 2002/96/EC
AC – Alternating current
AC and DC – Alternating and direct current
Ground/Earth

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PRECAUTIONS FOR USE
This device complies with safety standards IEC-61010-1 and 61010-2-032 for voltages of
1000V in category IV at an altitude of less than 2000m, indoors, with a degree of pollution
not exceeding 2. These safety instructions are intended to ensure the safety of persons and
proper operation of the device.
The operator and/or the responsible authority must carefully read and clearly
understand the various precautions to be taken in use.
If this instrument is used other than as specified, the protection it provides may be
compromised, thereby endangering you.
Do not use the instrument in an explosive atmosphere or in the presence of flammable
gases or fumes.
Do not use the instrument on networks of which the voltage or category exceeds those
mentioned.
Do not exceed the rated maximum voltages and currents between terminals or with
respect to earth.
Do not use the instrument if it appears to be damaged, incomplete, or not properly
closed.
Before each use, check the condition of the insulation on the leads, housing, and
accessories. Any element of which the insulation is deteriorated (even partially) must
be set aside for repair or scrapped.
Use leads and accessories rated for voltages and categories at least equal to those of
the instrument. If not, an accessory of a lower category lowers the category of the
combined Clamp + accessory to that of the accessory.
Observe the environmental conditions of use.
Do not modify the instrument and only use factory replacement parts. Repairs and
adjustments must be done by approved qualified personnel.
Replace the batteries as soon as the symbol appears on the display of the unit.
Disconnect all leads before opening the battery compartment cover.
Use personal protective equipment when conditions require.
Keep your hands away from the unused terminals of the instrument.
When handling the test probes, alligator clips, and clamp ammeters, keep your fingers
behind the physical guard.
As a safety measure, and to avoid repeated overloads on the inputs of the device,
configuration operations should only be performed when the device is disconnected
from all dangerous voltages.

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MEASUREMENT CATEGORIES
Definitions of the measurement categories :
CAT II: Circuits directly connected to the low-voltage installation.
Example: power supply to household electrical appliances and portable tools.
CAT III: Power supply circuits in the installation of the building.
Example: distribution panel, circuit-breakers, fixed industrial machines or
devices.
CAT IV: Circuits supplying the low-voltage installation of the building.
Example: power lines, meters, and protection devices.
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
Clamp-on Meter Model 203 ............................................................Cat. #2139.12
Includes set of 2, 5 ft. (1.5m) needle tip color-coded leads with 4mm right angle
plug, K-thermocouple with 4mm integrated adapter,soft carrying case, 1x9V
battery and user manual.
Replacement Parts:
Soft Carrying Case ...........................................................................Cat. #2118.65
K-thermocouple with 4mm integrated adapter..................................Cat. #2139.71
Set of 2, 5 ft. (1.5m) Needle Tip Color-coded (Rd/Bk) Leads w/4mm
Right-angle Plug
(600V CAT IV w/shield on Needle Tip, 1000V CAT II w/o shield).....Cat. #2154.74
Accessories:
Set of 2, Color-coded (Rd/Bk) Leads, Test Probes & Alligator ..........Cat #2152.05

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1 PRESENTATION
The Clamp-on Meter Model 203 is a professional electrical measuring instrument
that combines the following functions:
Current measurement
Measurement of InRush current / overcurrent (True InRush®)
Voltage measurement
Frequency measurement
Continuity test with buzzer
Resistance measurement
Diode test
Temperature measurement
Adapter function (for use with external transducers/measurement
devices)
Item Designation See §
1 Jaws with cente
ring marks
(see connection principles)
3.5 to
3.12
2 Physical Guard -
3 Rotary Function Switch 1.1
4 Function Buttons 2
5 Backlit Display 1.3
6 Input Terminals 1.4
7 Trigger -
Figure 1: Clamp-on Meter Model 203

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1.1 ROTARY SWITCH
The rotary switch has six positions. To access the , , , , ,
functions, set the switch to the desired function. The functions are described in
the table below.
1
Figure 2: Function Rotary Switch
Item Function See §
1 Adapter function 3.13
2 Temperature measurement (°C/°F) 3.12
3 AC, DC current measurement (A) 3.9
4 Continuity test
Resistance measurement Ω
Diode test
3.6
3.7
3.8
5 AC, DC voltage measurement (V) 3.5
6 OFF mode – Turns the clamp-on meter off 3.3
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1.2 FUNCTION BUTTONS
1 2 3
6 5 4
Figure 3: Function Buttons
Item Function See §
1 Holds the last value on the display
Zero correction ADC
Lead resistance compensation in the continuity and
ohmmeter functions
2.1
3.9.2
3.6.1
2 Selects the type of measurement and configuration
functions (AC, DC) 2.2
3 Enables/disables display backlighting 2.3
4 Activation of ΔREL mode – Displays differential and
relative values 2.6
5 Performs Frequency measurements (Hz) 2.5
6 Enables/disables the MAX/MIN mode
Enables/disables the True InRush®mode 2.4