ETEKCITY MSR-A1000 User manual

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Digital Multimeter
Questions or Concerns? [email protected] • [phone]
Model No.: MSR-A1000

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Thank you for purchasing the MSR-A1000
Digital Multimeter by Etekcity.
If you have any questions or concerns, please reach out to our
helpful Customer Support Team at [email protected].
We hope you enjoy your new multimeter!
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1 x Digital Multimeter
2 x 1.5V AA Batteries (Pre-Installed)
2 x Test Leads
1 x Temperature Probe
2 x Alligator Clip Cables
1 x Hook Clip
1 x User Manual
Package Contents
Safety Information
• Electrical Symbols
Multimeter Features
• Display Symbols
• Button Functions
Operation
• General Use
• DC/AC Voltage Measurement
• Resistance Measurement
• Continuity Measurement
• Diode Measurement
• Capacitance Measurement
• DC/AC Current Measurement
• Temperature Measurement
• Frequency Measurement
• Non-Contact AC Electric Field
Sensing
• Other Functions
Maintenance
• General Maintenance
• Replacing the Batteries
• Replacing the Fuses
Technical Index
• Specifications
Warranty Information
Customer Support
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Package ContentsTable of Contents

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WARNING
Safety Information
The following safety certification standards
apply to this multimeter:
• CE certifications
• EN 61010-1:2010 and EN 61010-2-030:2010
• EN 61326-1:2013 and EN 61326-2-2:2013
• Overvoltage category: CAT II 1000V/CAT
III 600V
• Double insulation
• Material pollution grade II
Only use the multimeter as directed, or the
multimeter may be damaged, and you may be
seriously injured.
• To reduce the risk of fire, electrical shock,
or other serious injury, please read and
follow all instructions and warnings in this
manual.
• The person responsible for this
equipment must ensure that all users
understand and follow the instructions.
• To avoid electric shock, never connect
leads to power sources that may exceed
1000V.
• Check the insulation layers (protective
coverings) of the multimeter and the test
leads before use. They should be in good
condition without any damage or broken
wires.
• To avoid electric shock, do not use
the multimeter if the rear cover or the
protective jacket is not fully in place.
• Do not use the multimeter if it is
damaged, if any part is removed, or if
you suspect that the multimeter is not
working correctly.
• Always inspect all parts of the multimeter
and the test leads before using. Always
replace damaged test leads.
• Do not apply more than 1000V between
the multimeter terminal and the ground.
In this manual:
WARNING identifies conditions and actions
that are dangerous to the user or may damage
the multimeter and test leads.

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• To avoid electric shock, be extremely
cautious when the measured voltage is
higher than DC 60V or AC 30Vrms.
• To avoid damaging the multimeter,
always turn the rotary dial to the correct
position when using.
• Do not change the range on the rotary
dial while the test leads are connected to
a power source.
• Do not alter the internal circuitry of the
multimeter. This may result in serious
injury.
• Do not use or store the multimeter in
wet or humid environments, in very
high temperatures, around explosive or
flammable substances, or in areas with
strong magnetic fields. The multimeter
will not perform correctly, which may
create a safety hazard.
• Never touch any exposed metal while
measuring. Keep fingers behind the finger
guards of the test leads.
• Avoid working alone.
• Do not allow children to operate or play
with this multimeter.
• Household use only.
Electrical Symbols
High Voltage Hazard
Double Insulation
Warning
AC
DC
Grounding
Conforms to European Union
Directives
WARNING

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Multimeter Features
A. Protective Jacket
B. Internal NCV Sensor
C. LCD Screen
D. Function Buttons
E. Stand
F. Rotary Dial
G. AInput Terminal
H. mA/uA Input Terminal
I. COM Input Terminal
J. Terminal
K. Test Lead Caps
L. Test Lead
M. Type K Thermocouple
Temperature Probe
N. Alligator Clip Cable
The MSR-A1000 is a multifunctional
multimeter with a large LCD screen,
true RMS, and both auto and manual
range. This multimeter is designed
with a new intelligent ADC chip,
overvoltage and overcurrent alarms,
lightning protection (6kV), and high
voltage protection. It is an ideal
digital multimeter for commercial
and industrial electricians.
B
D
A
C
F
E
L
GHIJ
M
K
N

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Display Symbols
Symbol Description
Auto power-off
High voltage warning
Data hold is active
Indicates a negative reading
AC measurement indicator
DC measurement indicator
Low battery indicator
Non-contact voltage detector
Input value is too large for the
selected range
Diode test
Continuity test
Capacitance test
Ohms (resistance)
Kilohm, 1 x 10³or 1,000 ohms
Symbol Description
Megaohm, 1 x 106or 1,000,000
ohms
Volts (voltage)
Millivolt, 1 x 10-3 or 0.001 of a volt
Amperes or amps (current)
Milliamp, 1 x 10-3 or 0.001 of an
amp
Microamp, 1 x 10-6 or 0.000001 of
an amp

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Button Functions
Button Description
SELECT
Press to switch between
resistance/diode/continuity/
capacitance, °C/°F
temperature, and AC/DC
current.
RANGE
Press to switch to manual
range at ACV, DCV, mV,
resistance, uA, mA and A
positions.
REL
Press to clear the base value
at ACV, DCV, mV, resistance/
capacitance, uA, mA and A
positions.
HOLD/
Press to enable/disable the
data hold mode (hold the
current measurement on the
display). Press and hold this
button for 2 or more seconds
to turn the backlight on or off.

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• Inspect the test leads for damaged insulation
or exposed metal parts. Check the leads for
continuity. Replace damaged test leads if
necessary.
• Keep your fingers behind the finger guards
at all times when handling the test probes.
[Figure 1.1]
• Always remove the test leads from the item
being measured before changing the range.
• Check the fuses in the multimeter before
measuring current. Always make sure
power to the circuit has been shut off before
connecting the multimeter to the circuit.
Once you have properly connected the
multimeter, power on the circuit.
• Remember to replace the batteries as soon
as the low battery indicator appears
(see Replacing the Batteries, page 19). The
multimeter may produce incorrect readings
if it is operated with a low battery.
• When measuring low voltages, the
multimeter reading will fluctuate a small
amount. This is due to ambient electricity
in the air.
• Always make sure the rotary dial is in the
correct position before using the multimeter
to measure anything.
General Use
Operation
Figure 1.1

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AC Voltage, DC Voltage, and DC
Millivoltage Measurement
Note:
• If the range of the measured voltage is unknown
before measuring, select the maximum range
and then gradually reduce the measuring range
until the multimeter shows an accurate reading.
• The display will show “ ” if the reading is
over range (if there is an overload within the
selected voltage range). Select a higher range
to get a correct reading.
• In each range selection, the multimeter has an
input impedance of 10MΩ. This load effect can
cause measurement errors in high impedance
circuits. If the circuit impedance is less than or
equal to 10kΩ, the error can be ignored (0.1%
or less).
• Before using the multimeter, try measuring a
known voltage to verify it is working correctly.
WARNING
• To avoid electric shock, DC
measurement should be less than
1000Vrms, and AC measurement
should be less than 750Vrms. It is
possible to measure higher voltage,
but this may damage the multimeter
and cause personal injury.
• Always take extra care to avoid
electric shock when measuring high
voltages.
1. Turn the rotary dial to the AC voltage, DC
voltage, or DC mV (millivolts) position.
[Figure 2.1]
2. Insert the black test lead into the COM
terminal, and the red test lead into the
terminal.
3. Connect the test leads in parallel to the
object being measured. Hold them in place
until the reading on the display stabilizes.
Hz
A
mA
µA
mV
V
V
OFF NCV
Ω
°F°C
Figure 2.1

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Note:
• If the resistance reading is greater than 0.5
when the test leads are shorted (connected to
each other), check if the test leads are loose or
damaged.
• The display will show “ ” if there is an open
circuit for the tested resistor or if the resistor
value is higher than the maximum resistance
range of the multimeter.
• When measuring low resistance, the resistance
of the test leads may affect the test result,
causing a 0.1 Ω –0.2 Ω measurement error. To
get an accurate measurement, first test the
resistance of the test leads by connecting them
to each other, and subtract this value from the
final measurement result.
• When testing high-resistance objects, it is
normal to wait for several seconds to obtain a
stable reading (>1M Ω ).
Figure 3.1
Resistance Measurement
WARNING
Before measuring, switch off the power
supply of the circuit, and fully discharge
all capacitors.
1. Turn the rotary dial to the resistance (Ω)
position. Press SELECT once to choose
resistance test. [Figure 3.1]
2. Insert the black test lead into the COM
terminal, and the red test lead into the
terminal.
3. Connect the test leads in parallel to the
object being measured. Hold them in place
until the reading on the display stabilizes.
Hz
A
mA
µA
mV
V
V
OFF NCV
Ω
°F°C
SELECT

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Figure 4.2
Continuity Measurement
WARNING
Before measuring, switch off the power
supply of the circuit, and fully discharge
all capacitors.
1. Turn the rotary dial to the continuity ( )
position. [Figure 4.1]
2. Insert the black test lead into the COM terminal,
and the red test lead into the
terminal.
3. Test the test leads before measurement by
connecting the metal ends of the leads together.
[Figure 4.2] The multimeter will beep to indicate
that the test leads are working properly.
4. Connect the test leads to the object being
measured.
a. If the multimeter does not beep, the
resistance of the object is greater than 51
ohms, and the circuit is broken.
b. If the multimeter beeps, the resistance of
the object is 10Ωor less, and the circuit is
closed (good conduction status).
Figure 4.1
Hz
A
mA
µA
mV
V
V
OFF NCV
Ω
°F°C

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Diode Measurement
WARNING
Before measuring, switch off the power
supply of the circuit, and fully discharge
all capacitors.
This test sends a current through a diode or
a semiconductor junction, then measures the
voltage drop across the junction.
1. Turn the rotary dial to the diode ( )
position. Press SELECT twice to choose
the diode test. [Figure 5.1]
2. Insert the black test lead into the COM
terminal, and the red test lead into the
terminal.
3. Connect both test leads to both ends of the
PN junction. Hold the leads in place until
the reading on the display stabilizes.
Note:
• The display will show “ ” if the test leads
are incorrectly connected, if the polarity is
reversed, or if the diode is open.
• The normal value for a PN silicon junction is
500–800mV (0.5–0.8V).
• The diode test voltage range is about
3.0V/1.5mA.
SELECT
Figure 5.1
Hz
A
mA
µA
mV
V
V
OFF NCV
Ω
°F°C

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Note:
• When nothing is being measured, the display
will show fixed value (intrinsic capacitance).
For small capacitance measurements, this fixed
value must be subtracted from the measured
value to ensure measurement accuracy. You can
also choose the relative measurement function
(REL) to automatically subtract the intrinsic
capacitance.
• The display will show “ ” if the measured
capacitor is short-circuited or the capacitance
exceeds the maximum range.
• When measuring large volume capacitors, it is
normal to wait for several seconds to obtain a
stable reading.
• When measuring capacitance of 100nF or above,
select relative measurement mode (REL) to
ensure accuracy.
Capacitance Measurement
WARNING
Before measuring, switch off the power
supply of the circuit, and fully discharge
all capacitors.
1. Turn the rotary dial to the capacitance
( ) position. Press SELECT three times
to choose the capacitance test. [Figure 6.1]
2. Insert the black test lead into the COM
terminal, and the red test lead into the
terminal.
3. Connect both test leads to both ends of the
capacitor. Hold the leads in place until the
reading on the display stabilizes.
SELECT
Figure 6.1
Hz
A
mA
µA
mV
V
V
OFF NCV
Ω
°F°C

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Note:
• If the range of the measured current is unknown
before measuring, select the maximum range
and then gradually reduce the measuring range
until the multimeter shows an accurate reading.
• If the or Aterminals are overloaded,
the internal fuses will be damaged and must be
replaced (with fuses of the same specification).
• If the test current is close to 10A, each
measurement time should be less than 10
seconds. Wait 15 minutes before measuring
again.
DC/AC Current Measurement
WARNING
• Before measuring, switch off the
power supply of the circuit, and
carefully check the input terminals and
the dial position.
• To avoid electric shock or damage to
the multimeter, never connect the
test leads with any voltage circuit in
parallel during current measurement.
1. Turn the rotary dial to the appropriate
DC/AC current position. Press SELECT to
choose AC or DC current test. [Figure 7.1]
2. Insert the black test lead into the COM
terminal, and the red test lead into the
or Aterminal.
3. Connect the test leads in series to the
source or circuit being measured. Hold
them in place until the reading on the
display stabilizes.
Hz
A
mA
µA
mV
V
V
OFF NCV
Ω
°F°C
Figure 7.1
SELECT

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Note:
• If the temperature probe is not attached, the
display will show “ ” when this function is
selected.
• The included type K (NiCr–NiSi) thermocouple
can only be used for temperatures lower than
482°F (250°C), or the thermocouple will be
damaged. Use a different thermocouple for
higher temperatures.
Temperature Measurement
1. Turn the rotary dial to the temperature
(°F°C) position. Press SELECT to choose
Fahrenheit or Celsius units. [Figure 8.1]
2. Use the type K thermocouple temperature
probe. Insert the black test lead into the
COM terminal, and the red test lead into
the terminal.
3. Connect the probe on the object being
measured. Hold them in place until the
reading on the display stabilizes.
Note:
• The measurement range is 10Hz–10MHz.
• The measurement signal should be less than
30V, or measurement accuracy may be affected.
Frequency Measurement
1. Turn the rotary dial to the Hz position.
[Figure 9.1]
2. Insert the black test lead into the COM
terminal, and the red test lead into the
terminal.
3. Connect the test leads in parallel to the
signal source. Hold them in place until the
reading on the display stabilizes.
Hz
A
mA
µA
mV
V
V
OFF NCV
Ω
°F°C
Hz
A
mA
µA
mV
V
V
OFF NCV
Ω
°F°C
Figure 9.1
Figure 8.1
SELECT

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Non-Contact AC Electric Field
Sensing
This test detects whether there is an AC
voltage or electromagnetic field in an area,
without touching the area or object being
measured.
1. Turn the rotary dial to the NCV position.
[Figure 10.1]
2. Place the front end of the multimeter near
the object being measured. The intensity
of the detected voltage will be displayed
on the LCD in horizontal segments (up to
4 segments). [Figure 10.2] The multimeter
will beep when voltage is detected. When
a more intense voltage is detected, it will
beep faster.
Hz
A
mA
µA
mV
V
V
OFF NCV
Ω
°F°C
Figure 10.1
Figure 10.2

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• If AC/DC current is over 10A, the
multimeter will beep continuously to warn
that the range is over its limit.
• Low Battery Detection: If the multimeter
internal battery voltage is under 2.5V,
the low battery symbol ( ) will appear
and flash. The multimeter will still work
normally. If the battery voltage is under
2.2V, the screen will only display the low
battery symbol ( ) after startup, and the
multimeter will not work.
Other Functions
• The multimeter will be ready to take
measurements 2 seconds after startup.
• If the multimeter is not used for 15 minutes,
it will automatically turn off to save power.
You can turn on the multimeter by pressing
any button or turning the dial, and the
multimeter will beep once.
• The multimeter will beep 5 times, 1 minute
before automatic shutoff. Immediately
before automatic shutoff, you will hear 1
long beep.
• To disable automatic shutoff, turn the dial
to the OFF position, press SELECT, and
turn on the multimeter.
• The multimeter will beep (for about 0.25
seconds) when pressing any button or
turning the dial.
• If the input DC voltage is 1000V or higher,
or if the AC voltage is 750V or higher, the
multimeter will beep continuously to warn
that the range is at its limit.

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1. Disconnect the test leads and turn the
rotary dial to OFF.
2. Remove the protective jacket from the
multimeter.
3. Use a small screwdriver to remove the
screw on the battery compartment cover
on the back of the multimeter.
4. Remove the old batteries. Install 2 new 1.5V
AA batteries into the compartment under
the correct polarity. [Figure 11.1]
5. Replace and secure the battery
compartment cover.
Replacing the Batteries
1.5V AA battery
Figure 11.1
Note:
• To avoid inaccurate measurements, replace
the batteries immediately when the low battery
indicator ( ) appears on the display screen.
• The multimeter requires two 1.5V AA batteries.
• Clean the multimeter with a damp cloth and
mild detergent. Do not use abrasives or
solvents.
• If you are experiencing any issues with
the multimeter, please contact Customer
Support (see page 30).
• Any calibration or maintenance must be
done by qualified professionals.
General Maintenance
Maintenance

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Replacing the Fuses
Figure 12.1
Note: The fuses may burn out because of
overcurrent or testing voltage improperly, and the
multimeter will not work correctly. Replace any
burnt-out fuses.
1. Disconnect the test leads and turn the
rotary dial to OFF.
2. Remove the protective jacket from the
multimeter.
3. Use a small screwdriver to remove both
screws on the bottom of the multimeter.
Remove the front cover from the back
cover. [Figure 12.1]
4. Replace the old fuses.
a. F1 Fuse Specifications: 0.6A/1000V
Φ6×32mm ceramic tube
b. F2 Fuse Specifications: 10A/1000V
Φ6×32mm ceramic tube
3. Replace and secure the back and front
covers of the multimeter, and replace the
protective jacket.