All-sun EM3672 User manual

Read this manual thoroughly before use
3672
Digital Multimeter
Users Manual

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This instrument is warranted to be free from defects in
material and workmanship for a period of one year. Any
instrument found defective within one year from the delivery
date and returned to the factory with transportation charges
prepaid, will be repaired, adjusted, or replaced at no charge
to the original purchaser. This warranty does not cover
expandable items such as batteries or fuses. If the defect
has been caused by a misuse or abnormal operating
conditions, the repair will be billed at a nominal cost.
WARRANTY
SAFETY INFORMATION
This meter has been designed according to IEC-61010
concerning electronic measuring instruments with a
measurement category (CAT II 250V) and pollution
degree 2.
Warning
To avoid possible electric shock or personal injury, follow
these guidelines:
a. Do not use the meter if it is damaged. Before you use
the meter, inspect the case. Pay particular attention
to the insulation surrounding the connectors.
b. Inspect the test leads for damaged insulation or

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exposed metal. Check the test leads for continuity.
Replace damaged test leads before you use the meter.
c. Do not use the meter if it operates abnormally.
Protection may be impaired. When in doubt, have
the meter serviced.
d. Do not operate the meter around explosive gas,
vapor, or dust.
e. Do not apply more than the rated voltage, as marked
on the meter, between terminals or between any
terminal and earth ground.
f. Before use, verify the meter's operation by measuring
a known voltage.
g. When measuring current, turn off circuit power
before connecting the meter in the circuit.
Remember to place the meter in series with the
circuit.
h. When servicing the meter, use only specified
replacement parts.
i. Use caution when working with voltage above
30V ac rms, 42V peak, or 60V dc. Such voltages
pose a shock hazard.
j. When using the probes, keep your fingers behind the
finger guards on the probes.
k. When making connections, connect the common
test lead before you connect the live test lead. When
you disconnect test leads, disconnect the live test
lead first.
l. Remove the test leads from the meter before you open

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the battery cover or the case.
m. Do not operate the meter with the battery cover or
portions of the case removed or loosened.
n. To avoid false readings, which could lead to possible
electric shock or personal injury, replace the
batteries as soon as the low battery indicator ( " " )
appears.
o. To avoid electric shock, don't touch any conductor
with hand or skin. Do not ground yourself while using
the meter.
p. When in Data Hold mode, the symbol " " is
displayed. Caution must be used because hazardous
voltage may be present.
q. Remaining endangerment:
When an input terminal is connected to dangerous live
potential it is to be noted that this potential at all
other terminals can occur!
r. CAT II - Measurement Category II is for measurements
performed on circuits directly connected to low
voltage installation. Examples are measurements on
household appliances, portable tools and similar
equipments. Do not use the meter for measurements
within Measurement Categories III and IV.

GENERAL DESCRIPTION
This meter is a compact 3 1/2digits digital multimeter for
measuring DC and AC voltage, DC and AC current,
resistance, diode, LED, capacitance, continuity,
temperature and battery. It features data hold, MAX
Recording mode, autorange mode and manual range
mode. It is easy to operate and is an ideal measurement
tool.
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Symbols
Alternating Current
Direct Current
DC or AC
Caution, risk of danger, refer to the operating
manual before use.
Caution, risk of electric shock.
Earth (ground) Terminal
Fuse
Conforms to European Union directives
The equipment is protected throughout by double
insulation or reinforced insulation.

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5 6 7
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1. Display
3 1/2digit LCD, with a max. reading of 1999
2. " Range " Button
Used to switch between autorange mode and
manual range mode, or used to select desired
manual range.
FRONT PANEL
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3. " MAXH " Button
Used to enter or exit MAX Recording mode.
4. Function/Range Switch
Used to select desired function and range as well as
to turn on off the meter.
5. " 10A " Terminal
Plug-in connector for the red test lead for current
( 200mA ~ 10A ) measurements.
6. " COM " Terminal
Plug-in connector for black (negative) test lead.
7. " V mA " Terminal
Plug-in connector for the red test lead for all
measurements except the current measurements
200mA.
8. " HOLD " Button
Used to enter or exit Data Hold mode.
9. " Select " Button
This button can be used to switch the meter between
(or among):
a. AC and DC measurement functions.
b. Resistance, diode and continuity measurement
functions.
c. Fahrenheit and Celsius temperature
measurements.
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2345 1
6
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DISPLAY SYMBOLS
Explanations:
1. --- Data Hold is enabled
2. --- Max. reading is being displayed
3. --- Continuity test is selected
4. --- Diode test is selected
5. --- Autorange mode is selected
6. --- AC
7. --- Negative sign
8. --- DC

nF , µF nF: Nanofarad;
µ F: Microfarad
1F=106 µ F=109nF=1012pF
capacitance
unit
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9. --- Battery is low and should be replaced
10.Input connection indicator
After the rotary switch is set to a range position, the
input connection indicator will indicate which input
terminals should be selected with the black dot " ".
11.Units on the LCD
mV, V
mV: Millivolt ; V: Volt;
1V=103mV
µA, mA
A
µ A: Microamp; mA: Milliamp;
A: Ampere;
1A=103mA=106 µ A
voltage
unit
current
unit
resistance
unit
, k ,
M
: Ohm; k : Kilohm;
M
: Megohm;
1M =103k =106
temperature
unit
°C, °F °C
: Celsius degree
°F : Fahrenheit degree

Display: 3 1/2-digit LCD, with a max. reading of 1999
Sampling Rate: about 2~3 times/sec
Overrange Indication: " OL " shown on the display
Battery: 9V, 6F22 or equivalent
Negative Polarity Indication: " - " shown on the
display automatically
Low Battery Indication: " " shown on the display
Operating Temperature: 0°C to 40°C, <75%RH
Storage Temperature: -10°C to 50°C, <85%RH
Dimensions: 158X80X56mm
Weight: about 310g (including battery)
GENERAL SPECIFICATION
Accuracy is specified for a period of one year after
calibration and at 18°C to 28°C, with relative humidity
< 75%. Accuracy specifications take the form of:
± ([% of Reading]+[number of Least Significant Digits])
SPECIFICATIONS
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200mV
2V
20V
200V
250V
± (0.8%+5)
0.1mV
0.001V
0.01V
0.1V
1V ± (1%+5)
Resolution AccuracyRange
DC Voltage
Input Impedance: 10M
Overload Protection: 250V DC/AC rms
Max. Input Voltage: 250V DC
Input Impedance: 10M
Frequency Response: 40Hz ~ 400Hz
Response: Average, calibrated in rms of sine wave
Overload Protection: 250V DC/AC rms
Max. Input Voltage: 250V DC
AC Voltage
2V
20V
200V
250V
0.001V
0.01V
0.1V
1V
Resolution AccuracyRange
± (1.5%+7)
± (1.0%+5)
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DC Current
Resolution AccuracyRange
± (1.2%+5)
± (2.0%+10)
200µA
2000µA
20mA
200mA
2A
0.1µA
1µA
0.01mA
0.1mA
0.001A
10A 0.01A
Overload Protection:
protection for " V mA " jack inputs: Fuse, 250mA/250V,
Fast action
protection for " 10A " jack inputs: Fuse, 10A/250V, Fast
action
Max. Input Current: 200mA (for " V mA " jack only)
10A (for " 10A " jack only)
( For inputs > 2A: measurement duration < 10 secs,
interval >15 minutes )

Overload Protection:
protection for " V mA " jack inputs: Fuse, 250mA/250V,
Fast action
protection for " 10A " jack inputs: Fuse, 10A/250V, Fast
action
Max. Input Current: 200mA (for " V mA " jack only)
10A (for " 10A " jack only)
( For inputs > 2A : measurement duration < 10 secs,
interval >15 minutes )
Frequency Response: 40Hz ~ 400Hz
Response: Average, calibrated in rms of sine wave
AC Current
Resolution AccuracyRange
± (1.5%+5)
± (3.0%+10)
200µA
2000µA
20mA
200mA
2A
10A
0.1µA
1µA
0.01mA
0.1mA
0.001A
0.01A
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Open Circuit Voltage: about 0.25V
Overload Protection: 250V DC/AC rms
Resistance
± (1.5%+5)
200
2k
20k
200k
2M
20M 0.01M
0.001M
0.1k
0.001k
0.01k
0.1 ± (1.2%+5)
± (1%+5)
± (1.2%+5)
Resolution AccuracyRange
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-20°C ~
1000°C
-0°F ~
1800°F
1°C
1°F
-20°C~0°C: ± (5%+4)
0°C~400°C: ± (1.5%+4)
400°C~1000°C: ± (2%+4)
-0°F~50°F: ± (5%+8)
50°F~750°F: ± (1.5%+8)
750°F~1800°F: ± (2%+8)
Use K Type thermocouple
Overload Protection: 250V DC/AC rms
Note:
1. The accuracy does not include error of the
Temperature
Resolution AccuracyRange

LED Test
When the LED under test lights, the displays shows
the appropriate operating voltage of the LED. (Operating
current is about 15mA.)
Before you connect the LED to meter or when the LED
connection is reversed, the display will show the
Overload Protection: 250V DC/AC rms
Test Current:
1.5V battery: about 5mA
3V battery: about 10mA
6V battery: about 20mA
9V battery: about 30mA
battery with rating > 12V: about 35mA
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Battery
1.5V ~ 48V
The approx. voltage of the
battery is shown on the display.
DescriptionRange
thermocouple probe.
2. Accuracy specification assumes ambient temperature
is stable to ±1°C. For ambient temperature changes
of ±5°C, rated accuracy applies after 1 hour.

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approximate supply voltage (which is usually higher than
the actual supply voltage) of the meter.
200 µ F~400 µ F* ± (8%+10)
400 µ F~600 µ F: ± (15%+10)
600 µ F~1000 µ F: not specified
Open Circuit Voltage: about 0.5V
Overload Protection: Fuse, 250mA/250V, Fast
Capacitance
20nF
200nF
2µF
20µF
200µF
1000µF 1µF
0.1µF
0.01µF
0.1nF
0.001µF
0.01nF ± (8%+10)
± (5%+5)
Resolution AccuracyRange

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Overload Protection: 250V DC/AC rms
Note:
For continuity test, when the resistance is between 30
and 100 , the buzzer may sound or may not sound.
When the resistance is more than 100 , the buzzer
won't sound.
Diode and Continuity
Open Circuit Voltage:
about 1. 5V
Range Description Remark
Open Circuit Voltage:
about 0. 5V
The approximate forward
voltage drop of the diode
will be displayed.
The built-in buzzer will
sound if the resistance
is less than about 30 .

OPERATION INTRODUCTION
Manual Ranging and Autoranging
The meter defaults to autorange mode in measurement
functions which have both autorange mode and manual
range mode. When the meter is in autorange mode,
" AUTO " is displayed.
1. To enter the manual range mode, press the Range
button, the meter enters the manual range mode,
" AUTO " turns off.
Each press of the Range button increases the range.
When the highest range is reached, the meter wraps
to the lowest range.
2. To exit the manual range mode, press and hold down
the Range button for about 2 seconds. The meter
returns to the autorange mode.
Data Hold Mode
Press the HOLD button to enter Data Hold mode. The
present reading is held on the display, " " appears on
the display as an indicator.
To exit the Data Hold mode, press the button again.
" " disappears.
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MAX Recording Mode
The MAX mode records maximum value of all input
values since this mode is activated.
When the inputs go above the recorded maximum value,
the meter records the new value.
To use MAX recording :
1. Make sure the meter is in the desired function.
2. Press the MAXH button to activate the MAX mode.
The display shows the maximum reading, the symbol
" " appears as an indicator.
3. To exit the MAX mode and erase stored readings,
press the MAXH button again or turn the range
switch.
Note:
The MAXH button is disabled in temperature, resistance,
diode and continuity measurement functions.
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