ETEKCITY MSR-U1000 User manual

User Manual
Digital Multimeter
model no.: MSR-U1000

- 1 -
Safety Information
This Operating Manual covers information on safety and cautions. Please read the
relevant information carefully and observe all the Warnings and Notes strictly.
Warning
Unpacking Inspection
Open the package case and take out the Meter. Check the following items carefully
to see any missing or damaged part:
Description
Operating Manual
Test Lead
Multi-Purpose Socket
9V Battery (NEDA1604, 6F22 or 0006P) (installed inside the Meter)
Item
1
2
3
4
Qty
1 piece
1 pair
1 piece
1 piece
This Meter complies with the standards IEC61010: in pollution degree 2, overvoltage
category (CAT. III 1000V, CAT. IV 600V) and double insulation.
CAT III: Distribution level, fixed installation, with smaller transient overvoltages than
CAT. IV.
CAT IV: Primary supply level, overhead lines, cable systems etc.
Use the Meter only as specified in this operating manual, otherwise the protection
provided by the Meter may be impaired.
In this manual, a Warning identifies conditions and actions that pose hazards to the
user, or may damage the Meter or the equipment under test.
A Note identifies the information that user should pay attention on.
International electrical symbols used on the Meter.

- 2 -
Rules For Safe Operation
Warning
To avoid possible electric shock or personal injury, and to avoid possible
damage to the Meter or to the equipment under test, adhere to the following
rules:
Before using the Meter inspect the case. Do not use the Meter if it is
damaged or the case (or part of the case) is removed.Look for cracks or
missing plastic. Pay attention to the insulation around the connectors.
Inspect the test leads for damaged insulation or exposed metal. Check
the test leads for continuity.Replace damaged test leads with identical
model number or electrical specifications before using the Meter.
Do not apply more than the rated voltage, as marked on the Meter, between
the terminals or between any terminal and grounding.
The rotary switch should be placed in the right position and no any
changeover of range shall be made during measurement is conducted to
prevent damage of the Meter.
When the Meter working at an effective voltage over 60V in DC or 30V
rms in AC, special care should be taken for there is danger of electric shock.
Do not use or store the Meter in an environment of high temperature,
humidity, explosive, inflammable and strong magnetic field. The performance
of the Meter may deteriorate after dampened.
When using the test leads, keep your fingers behind the finger guards.
Disconnect circuitpowerand discharge all high-voltage capacitors before
testing resistance, continuity and diodes.
Before measuring current, check the Meter is fused and turn off the current
to be tested before connecting the Meter to the circuit. After connecting
the circuit reliably, turn the current to be tested on.
Replace the battery as soon as the battery indicator appears. With a
low battery, the Meter might produce false readings that can lead to electric
shock and personal injury.
When servicing the Meter, use only the same model number or identical
electrical specifications replacement parts.
The internal circuit of the Meter shall not be altered at will to avoid damage
of the Meter and any accident.
Soft cloth and mild detergent should be used to clean the surface of the
Meter when servicing. No abrasive and solvent should be used to prevent
the surface of the Meter from corrosion, damage and accident.
The Meter is suitable for indoor use.

- 3 -
The Meter Structure (see figure 1)
Rotary Switch
Turn the Meter off when it is not in use and take out the battery when not
using for a long time.
Constantly check the battery as it may leak when it has been using for
some time, replace the battery as soon as leaking appears. A leaking
battery will damage the Meter.
International Electrical Symbols
AC or DC
Double Insulated
Warning. Refer to the Operating
Manual
Grounding
Deficiency of Built-In Battery
Conforms to Standards of
European Union
LCD Display
Functional Buttons
Blue button
Rotary Switch
Input Terminal:
figure 1
1
2
3
4
5
Below table indicated for information about the rotary switch positions.
AC and DC Voltage Measurement
Resistance Measurement
Diode Test
Continuity Test
Capacitance Test
Frequency and Duty Cycle Test
Transistor
DC and AC current measurement
DC and AC current measurement
10A DC and AC current measurement
Sensor Test
Power off
OFF
mV

- 4 -
Functional Buttons
Below table indicated for information about the functional button operations.
Press to select the maximum and minimum value.
Operation Performed.
Press and hold for 2 serconds to turn the display backlight on or off.
Press to enter or exit data hold mode.
Press to select the alternate function.
Press RANGE to enter the manual ranging mode;
the Meter beeps.
Press RANGE to step through the ranges available for the
selected function; the Meter beeps.
Press and hold RANGE for 2 seconds to return to autoranging;
the Meter beeps
Press again to exit REL mode
Press to enter REL mode.
Button
Hold
BLUE Button
RANGE
REL
Display Symbols
Meaning
Data hold is active.
Sleep Mode indicator.
Indicates negative reading.
Indicator for AC measurement.
Indicator for DC measurement.
The Meter is in the auto range mode in which the Meter automatically
selects the range with the best resolution.
Indicator for manual ranging mode. (optional)
The input value is too large for the selected range.
Transistor testing indicator.
Test of diode.
The continuity buzzer is on.
Maximum and Minimum reading.
Data output is in progress. (optional)
The battery is low.
Warning: To avoid false readings, which could lead to
possible electric shock or personal injury, replace the battery
as soon as the battery indicator appears.
Sensor test is in progress
No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Symbol
The REL is on to display the stored value minus the present value.
16
: Ohm. The unit of resistance.
k: kilohm. 1 x 103or 1000 ohms.
M: Megaohm. 1 x 106or 1,000,000 ohms.
V: Volts. The unit of voltage.
mV: Millivolt. 1 x 10-3 or 0.001 volts.
17

- 5 -
figure 2
Measurement Operation
No
A: Amperes (amps). The unit of current.
mA: Milliamp. 1 x 10-3 or 0.001 amperes
µA : Microamp. 1x 10-6 or 0.000001 amperes
F: Farad. The unit of capacitance.
µF : Microfarad. 1 x 10-6 or 0.000001 farads.
nF : Nanofarad. 1 x 10-9 or 0.000000001 farads.
: Centigrade. The unit of temperature (optional).
: Fahrenheit. The unit of temperature (optional).
Hz: Hertz. The unit of frequency in cycles/second.
kHz: Kilohertz. 1 x 103or 1,000 hertz.
MHz: Megahertz. 1 x 106or1,000,000 hertz.
The unit of transistor
17
Symbol Meaning
A. DC/AC Voltage Measurement (See figure 2)

- 6 -
Note
In each range, the Meter has an input impedance of 10M except mV range
which input impedance is 3000M. This loading effect can cause measurement
errors in high impedance circuits. If the circuit impedance is less than or equal
to 10k , the error is negligible (0.1% or less).
When measuring mV, you must press RANGE manually to enter mV range.
When voltage measurement has been completed, disconnect the connection
between the testing leads and the circuit under test, and remove the testing leads
away from the input terminals of the Meter.
Warning
Before connecting the Meter to the return circuit to be tested, cut off the current
of the return circuit.
If the fuse burns out during measurement, the Meter may be damaged or the
operator himself may be hurt.
Use proper terminals, function, and range for the measurement.
When the testing leads are connected to the current terminals, do not parallel
them across any circuit.
To measure current, do the following:
1. Insert the red test lead into the mA A or A input terminal and the black test lead
into the COM terminal.
2. Set the rotary switch to A, mA, or A.
3. The Meter defaults to DC current measurement mode. To toggle between DC
and AC current measurement function, press BLUE button.
4. Connect the test lead in serial to the return circuit to be tested. The measured
value shows on the display.
Display effective value of sine wave (mean value response).
5. Press Hz% to obtain the frequency and duty cycle value.
Input Amplitude: (DC electric level is zero)
Input Amplitude: range 30%
Frequency response: 400Hz
B. DC/AC Current Measurement (See figure 3)
figure 3
A

- 7 -
Note
If the value of current to be measured is unknown, use the maximum measurement
position, and reduce the range step by step until a satisfactory reading is obtained.
For safety sake, each measurement time for >5A current should be less than
10 seconds and the interval time between 2 measurements should be greater
than 15 minutes.
When current measurement has been completed, disconnect the connection
between the testing leads and the circuit under test, and remove the testing leads
away from the input terminals of the Meter.
C. Measuring Resistance (See figure 4)
figure 4
Warning
To avoid damages to the Meter or to the devices under test, disconnect circuit
power and discharge all the high-voltage capacitors before measuring resistance.
To avoid harm to yourself, do not input higher than DC 60V or AC 30V voltages.
To measure resistance, connect the Meter as follows:
1. Insert the red test lead into the terminal and the black test lead into the COM
terminal.
2. Set the rotary switch to resistance measurement ( ) is default or press BLUE
button to select measurement mode.
3. Connect the test leads across with the object being measured. If there is lead on
the resistor or SMT resistor, it is more convenience to use the included multi-
purpose socket to carry out testing.The measured value shows on the display.

- 8 -
D. Testing for Continuity (See figure 5)
figure 5
Warning
To avoid damages to the Meter or to the devices under test, disconnect circuit
power and discharge all the high-voltage capacitors before testing for continuity.
To avoid harm to yourself, do not input higher than DC 60V or AC 30V voltages.
To test for continuity, connect the Meter as below:
1. Insert the red test lead into the terminal and the black test lead into the COM
terminal.
3. The buzzer sounds continuously if the resistor to be tested is <10 .
.
The buzzer does not sound if the resistor to be tested is >35
Note
Open circuit voltage is around 0.45V.
When continuity testing has been completed, disconnect the connection between
the testing leads and the circuit under test, and remove the testing leads away
from the input terminals of the Meter.
2. Set the rotary switch to and press BLUE button to select measurement mode.

- 9 -
E. Testing Diodes (See figure 6)
figure 6
Connect the test leads to the proper terminals as said above to avoid error
display. The LCD will display OL indicating diode being tested is open or polarity
is reversed. The unit of diode is Volt (V), displaying the forward voltage drop
readings.
When diode testing has been completed, disconnect the connection between
the testing leads and the circuit under test, and remove the testing leads away
from the input terminals of the Meter.