Major tech MT1003 User manual

MT1003
True RMS
Digital Multimeter

Contents
1. Introduction.................................................3
2. Safety......................................................... 3
3. Safety Instructions.......................................7
4. Feature....................................................... 8
5. Measure Function.......................................11
6. Default Display...........................................19
7. Setup Options............................................24
8. Specifications.............................................30
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Professional True RMS Industrial Digital Multimeter and TFT color LCD
display, providing fast A/D converting sampling time, high accuracy, built-in
datalogging and Trend Capture features. It can trace any interruption
problems of the equipment and watch on without person. It is easy to find
and solve the problems of the production equipment, providing memory to
the datasheets. It is has much safer measurements.
This meter measures AC/DC Voltage, AC/DC Current, Resistance,
Capacitance, Frequency (electrical & electronic), Duty Cycle, Diode Test,
Insulation Test, and Continuity plus Thermocouple Temperature. It can store
and recall data. It features a waterproof, rugged design for heavy duty use.
Proper use and care of this meter will provide many years of reliable service
INTRODUCTION
Safety
This symbol adjacent to another symbol, terminal or
operating device indicates that the operator must
refer to an explanation in the Operating Instructions
to avoid personal injury or damage to the meter.
!
This symbol adjacent to one or more terminals
identifies them as being associated with ranges that
may, in normal use, be subjected to particularly
hazardous voltages. For maximum safety, the meter
and its test leads should not be handled when these
terminals are energized.
Equipment is protected by double or reinforced
insulation
MAX
WARNING
This WARNING symbol indicates a potentially hazardous
situation, which if not avoided, could result in death or
serious injury.
CAUTION
This CAUTION symbol indicates a potentially hazardous
situation, which if not avoided, may result in damage to
the product.
This symbol advises the user that the terminal(s) so
marked must not be connected to a circuit point at which
the voltage with respect to earth ground exceeds (in this
case) 1000 VAC or VDC.
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PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY
OVERVOLTAGE CATEGORY I
Note: Examples include protected electronic circuits.
Equipment of OVERVOLTAGE CATEGORY I is equipment for connection
to circuits in which measures are taken to limit the transient overvoltages to
an appropriate low level.
OVERVOLTAGE CATEGORY II
Note: Examples include household, office, and laboratory appliances.
Equipment of OVERVOLTAGE CATEGORY II is energy-consuming
equipment to be supplied from the fixed installation.
OVERVOLTAGE CATEGORY III
Note: Examples include switches in a fixed installation and some
equipment for industrial use with a permanent connection to the
fixed installation.
Equipment of OVERVOLTAGE CATEGORY III is equipment in
fixed installations.
OVERVOLTAGE CATEGORY IV
Note: Examples include electricity meters and primary over-
current protection equipment
Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin
of the installation.
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This meter has been designed for safe use, but must be operated
with caution. The rules listed below must be carefully followed for
safe operation.
NEVER apply voltage or current to the meter that exceeds the
specified maximum:
USE EXTREME CAUTION when working with high voltages.
DO NOT measure voltage if the voltage on the "COM" input jack
exceeds 1000V above earth ground.
NEVER connect the meter leads across a voltage source while the
function switch is in the current, resistance, or diode mode. Doing so
can damage the meter.
ALWAYS discharge filter capacitors in power supplies and disconnect
the power when making resistance or diode tests.
ALWAYS turn off the power and disconnect the test leads before
opening the covers to replace the fuse or batteries.
NEVER operate the meter unless the back cover and the battery and
fuse covers are in place and fastened securely.
If the equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment may be
impaired.
Safety Instructions
Input Protection Limits
Function
V DC or V AC
mA AC/DC
A AC/DC
Frequency, Resistance, Capacitance,
Duty Cycle, Diode Test, Continuity
Temperature
Surge Protection: 8kV peak per IEC 61010
Maximum Input
1000V DC/AC RMS
800mA 1000V fast acting fuse
10A 1000V fast acting fuse
(20A for 30 seconds max every
10 minutes)
1000V DC/AC RMS
1000V DC/AC RMS
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1. F1 button, Default switch to Graph measure.
2. F2 button, Default modes related to the rotary switch function.
3. F3 button, Default into save mode, default display and wake up
for APO.
4. F4 button, Default modes MIN/MAX starts and stops MIN/MAX
recording.
Feature
The 6 push buttons on the front of the Meter
activate features that augment the function
selected using the rotary switch, navigate
menus or control power to Meter circuits.
Understanding the Push Buttons
5. RANGE, Into manual range and select range of the measurement.
When Pressing the RANGE button for more than 1 second the
instrument will return to AUTO RANGE.
6. HOLD/REL, Freezes the present reading on the display and allows
the display to be saved. If Pressing the HOLD/REL button for more
than 1 second will switch to RELATIVE MODE.
1
2 3
4
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6

7
8
9
Understanding the Display
1. Labels on the LCD display indicate the function of the button just
below the displayed label.
2. Analog bargraph display of the input signal.
3. Minus sign Indicates a negative reading.
4. Displays measurement information about the input signal.
5. Indicates the range the Meter is in and the ranging mode (auto or
manual)
6. Indicates the time set in the internal clock.
7. Indicates the Meter's beeper is enabled (not associated with the
continuity beeper).
8. Indicates the charge level of the batteries
9. Indicates the units of measure.
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Select a primary measurement function by positioning the rotary switch
to one of the icons around its perimeter. For each function, the Meter
presents a standard display for that function (range, measurement units,
and modifiers). Button choices made in one function do not carry over
into another function.
All functions except Current use the VOHMS and COM input terminals.
The two Current input terminals
Hz%
VΩ
CAP Temp
Input for 0A to 10.00A Current
(20VA overload for 30 seconds on,
10 minutes off)
Input for 0A to 600mA
Current measurements.
Return terminal for
all measurements.
Input for Voltage, Continuity,
Resistance, Diode test,
Conductance, Capacitance.
10A
µA mA
COM
Understanding the Rotary Switch
Using the Input Terminals
V-
mV
Hz%
Temp
A
mA
4-20 mA%
uA
AC voltage measurements
DC and AC+DC voltage measurements.
DC(AC) milli-volts measurements.
Resistance, Diode test, Capacitance
and Continuity Measurements.
Frequency measurements.
Temperature measurements.
AC, DC amps measurements.
AC, DC milliamps measurements.
AC, DC microampere measurements
up to 5,000 µA.
V~
% 4-20MA measurements.
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AC Voltage Measurements
Measure Function
WARNING: Risk of Electrocution. The probe tips may not be long enough
to contact the live parts inside some 240V outlets for
appliances because the contacts are recessed deep inside the
outlets. As a result, the reading may show 0V when the
outlet actually has voltage present. Make sure the probe tips
are touching the metal contacts inside the outlet before
assuming that no voltage is present.
CAUTION: Do not measure AC voltages if a motor on the circuit is being
switched ON or OFF. Large voltage surges may occur that
can damage the meter.
1. Set the function switch to the yellow
VAC position.
2. Insert the black test lead banana plug
into the negative COM jack. Insert
the red test lead banana plug into the
positive V jack.
3. Read the Voltage in the main display
9

DC Voltage Measurements
CAUTION: Do not measure DC voltages if a motor on the circuit is
being switched ON or OFF. Large voltage surges may occur
that can damage the meter.
1. Set the function switch to the
yellow VDC position.
2. Insert the black test lead banana
plug into the negative COM jack.
Insert the red test lead banana
plug into the positive V jack.
3. Read the Voltage in the display.
1. Set the function switch to the yellow
VDC position.
2. Insert the black test lead banana plug
into the negative COM jack. Insert
the red test lead banana plug into
the positive jack.
3. Press the MODE key to indicate
"AC + DC" on the display.
4. Read AC + DC measurement value in
the display.
AC + DC
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CAUTION: Do not measure mV voltages if a motor on the circuit is
being switched ON or OFF. Large voltage surges may occur
that can damage the meter.
mV Voltage Measurements
1. Set the function switch to the
yellow mV position.
2. Press the MODE key.
Switch to mVDC (mVAC).
3. Insert the black test lead banana
plug into the negative COM jack.
Insert the red test lead banana plug
into the positive V jack.
4. Read the mV voltage in the display
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1. Set the function switch to the yellow
Hz% position.
2. Insert the black test lead banana plug
into the negative COM jack.
Insert the red test lead banana plug
into the positive V jack.
3. Read the Frequency in the display.
1. Set the function switch to the yellow
Ω CAP position.
2. Insert the black test lead banana plug into
the negative COM jack. Insert the red test
lead banana plug into the positive Ω Jack.
3. Read the resistance in the display.
Frequency Measurements
Resistance Measurements
To avoid electric shock, disconnect power to
the unit under test and discharge all capacitors
before taking any resistance measurements.
Remove the batteries and unplug the line cords.
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WARNING: To avoid electric shock, disconnect power to the unit under
test and discharge all capacitors before taking any
resistance measurements. Remove the batteries and unplug
the line cords.
Continuity Check
1. Set the function switch to the yellow
Ω CAP position.
2. Press the MODE key. Switch to
Conductace.
3. Insert the black test lead banana plug into
the negative COM jack.
Insert the red test lead banana plug into
the positive jack.
4. If the resistance is less than
approximately 50Ω, the audible signal will
sound. If the circuit is open, the display
will indicate "OL".
Diode Test
1. Set the function switch to the yellow
Ω CAP position.
2. Press the MODE key. Switch to
Diode.
3. Insert the black test lead banana plug
into the negative COM jack and the red
test lead banana plug into the positive
V jack.
4. Forward voltage will typically indicate
0.400 to 3.200V. Reverse voltage will
indicate "OL". Shorted devices will
indicate near 0V and an open device
will indicate "OL" in both polarities.
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WARNING: To avoid electric shock, disconnect power to the unit under
test and discharge all capacitors before taking any
capacitance measurements. Remove the batteries and
unplug the line cords.
Capacitance Measurements
1. Set the rotary function switch
to the yellow Ω CAP position.
2. Press the MODE key.
Switch to CAP.
3. Insert the black test lead
banana plug into the negative
COM jack. Insert the red test
lead banana plug into the
positive V jack.
4. Read the Capacitance value in
the display.
1. Set the function switch to the
yellow TEMP (°C or °F) position.
2. Press the MODE key.
Switch to TEMP (°C or °F).
3. Insert the Temperature Probe into
the input jacks, making sure to
observe the correct polarity.
4. Read the temperature in the display
Temperature Measurements
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CAUTION: Do not make 20A current measurements for longer than 30
seconds. Exceeding 30 seconds may cause damage to the
meter and/or the test leads.
DC Current Measurements
1. Insert the black test lead banana
plug into the negative COM jack.
2. For current measurements up to
6000µA DC, set the function switch
to the yellow µA position and insert
the red test lead banana plug into
the µA/mA jack.
3. For current measurements up to
600mA DC, set the function switch to
the yellow mA position and insert
the red test lead banana plug into
the µA/mA jack.
4. For current measurements up to 10A
DC, set the function switch to the
yellow 10A position and insert the
red test lead banana plug into the
10A jack.
5. Press the MODE key to indicate
"DC" on the display.
6. Read the current in the display.
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CAUTION: Do not make 10A current measurements for longer than 30
seconds. Exceeding 30 seconds may cause damage to the
meter and/or the test leads.
AC Current Measurements
1. Insert the black test lead banana
plug into the negative COM jack.
2. For current measurements up to
6000µA AC, set the function
switch to the yellow µA position
and insert the red test lead
banana plug into the µA/mA
jack.
3. For current measurements up to
600mA AC, set the function
switch to the yellow mA position
and insert the red test lead
banana plug into the µA/mA
jack.
4. For current measurements up to
10A AC, set the function switch
to the yellow 10A position and
insert the red test lead banana
plug into the 10A jack.
5. Press the MODE key to
indicate "AC" on the display.
6. Read the current in the display.
1. Set up and connect as described for DC mA measurements.
2. Set the rotary function switch to the 4-20mA% position.
3. The meter will display loop current as a % with 0mA=-25%,
4mA=0%, 20mA=100%, and 24mA= 125%.
4 — 20mA% MEASUREMENTS
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Default Display
Press Graph (F1) key,
the meter will switch to Graph measure.
Press the START key.
Press the FAST or SLOW key to adjust
the sampling rate.
Press the CANCEL key to exit Graph and
return to normal measurement mode
Graph Measure
Press the STOP key.
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Press the SAVE key to save the Graph.
Press the BACK key to return.
To activate the MAX/MIN mode,
Press MIN/MAX(F4) key,
at the measurement mode.
As shown in the Figure, the Meter displays
at the top of the measurement page, the
MAX/MIN start date and the amount of
time at the bottom of the page. In addition,
the recorded maximum, average, and
minimum values appear in the secondary
display with their respective elapsed times.
To stop a MIN/MAX recording session, press the STOP key.
The summary information in the display freezes, and the label function
changes to allow saving the collected data. Pressing the CLOSE key exits the
MIN/MAX record session without saving the collected data.
To save the MIN/MAX screen data, the MIN/MAX session must be ended
by pressing the STOP key. Next, press the SAVE key.
Capturing Minimum and Maximum Values
18

To activate the peak mode, at AC
measure MIN/MAX mode , Press the
PMAX(F4) button.
To activate the relative mode, Press
the HOLD/REL button for more
than 1 second.
To freeze the display for any function,
press the HOLD button.
Press the SAVE key to save to
memory.
Press the CLOSE key to return to
measurement.
Capturing Peak Values
Relative Values
Hold Mode
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Press the SAVE(F3) key to enter the
save menu
For common measurement functions, a snapshot of the screen data is
saved by pressing the SAVE key.
Then press the DOWN(F3) key to save the selected item, press the
ENTER(F1) key.
Viewing data stored in the Meter's memory
is performed through the SAVE menu.
Press the DOWN (F3) key.
Position the menu selector next to the
menu item labeled ViewM.
Press the ENTER(F1) key.
Viewing data stored in the Meter's memory
is performed through the SAVE menu.
Press the DOWN (F3) key.
Position the menu selector next to the
menu item labeled Graph.
Press the ENTER(F1) key.
Save Function
Storing Individual Measurement Data
Viewing Memory Data
Viewing Graph Data
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