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04
FRONT PANEL
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General Description
This compact digital multimeter is designed to measure
AC and DC Voltages, AC and DC current, Resistance,
Diode and to perform audible Continuity checks with
accuracy and ease.
Small and lightweight, with a carrying case and test leads
wound on its Body, this instrument will provide you years
of satisfactory service.
Auto power-off function extends the battery life. If no
key-inputs happen around 30 minutes, this meter will be
turned off automatically.
1. Select Button
Momentary-type push
switch for measuring
functions select.
2. HOLD Button
Momentary-type push
switch for data hold.
3. Function Switch
Rotary switch for
selecting functions.
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M320C
AUTO RANGING
POCKET-SIZED DIGITAL MULTIMETER
OPERATOR'S INSTRUCTION MANUAL
Maintenance
• Before opening case, always disconnect test beads
from all energized circuits.
• For continuous protection against fire, replace fuse only
with ratings; F 400mA/300V (Quick Acting).
• Never use the meter unless the back cover is in place
and fastened completely.
• Do not use abrasives or solvents on the meter. To clean
it uses only a damp cloth and mild detergent.
Safety Symbols
05
Specifcation
Accuracy is guaranteed for 1 year,
23°C±5°C,less than 75% RH.
DC Voltage
AC Voltage
Overload protection: 300V DC or rms AC for all ranges
Input Impedance:10MΩ
Frequency range: 50Hz to 400Hz, 50 to 60Hz for 300V
range.
Response: Average responding, calibrated in rms of
a sine wave
DC Current
Overload Protection: F 400mA/300V fuse
Overload protection: 300V DC or rms AC for all ranges
Input Impedance: 10MΩ
Accuracy
±0.8% of rdg ±4 dgts
±0.8% of rdg ±4 dgts
±0.8% of rdg ±4 dgts
Range
4V
40V
300V
Resolution
1mV
10mV
1V
Range
Accuracy
Resolution
40mA
±2.0% of rdg ±3dgts
0.01mA
400mA
±2.0% of rdg ±3dgts
0.1mA
Range
Accuracy
Resolution
400mV
±0.5% of rdg ±3dgt
0.1mV
4V
40V
±0.5% of rdg ±3dgt
±0.8% of rdg ±3dgt
1mV
10mV
300V
1V
±0.8% of rdg ±3dgt
AUTO-RANGE
DMM
300V 400mA MAX
CAT III 300V
M320C
HOLD SELECT
OFF
mA
V
Hz
5
1
4
3
2
AUTO-RANGE
DMM
300V 400mA MAX
CAT III 300V
M320C
HOLD SELECT
OFF
mA
V
Hz
AC Current
Overload Protection: F 400mA/300V fuse.
Range
Accuracy
Resolution
40mA
±3.0% of rdg ± 4dgts
0.01mA
400mA
±3.0% of rdg ± 4dgts
0.1mA
Audible Continuity Test
Built-in buzzer sounds when resistance
is less than 50±20Ω.
Overload Protection:250V rms ac
Range
Description
4
. Test Leads
Red test lead for
positive (+) and
black test lead for
negative (-)
5. LCD Display
3 ¾ digits, 7 segment,
maximum 3999 counts.
Safety information
This meter has been designed according to EN61010-1,
EN61010-2-030,EN61010-2-033, 300V CAT III and
pollution2.
Follow all safety and operating instructions to ensure the
meter is used safely and is kept in good condition With
proper use and care, your digital multimeter will give you
years of satisfactory service.
During use
• Never exceed the protection limit indicated in the
specifications for each range of measurement.
• Never use the meter to measure voltages that might
exceed 300V above earth ground in category III
installations
• Always be careful when working with voltages above
60v dc or 30v ac rms. keep fingers behind the probe
barriers while measuring.
• Do not perform resistance measurements on live circuits.
• Inspect test leads and probes for cracks, breaks or
crazes in the insulation before using the meter
• If the equipment is used in a manner not specified by
manufacturer, the protection provided by equipment may
be impaired.
Important safety information ,refer to the
instruction manual.
Fuse must be replaced with ratings specified
in the manual.
AC (Alternating Current)
DC (Direct Current)
Earth(ground) TERMINAL
Equipment protected throughout by double insulation.
CAT III:
Applicable to test and measuring circuits connected
to the distribution part of the building's low-voltage MAINS
installation.Example:fixed equipment switchboards,circuit
breakers,wiring,including cables,bus bars,junction boxes,
switches,sockets,utput terminals on devices for industrial
use and other equipment.
CAT III
300 V
European union directives
CONFORMS TO UL STD. 61010-1, 61010-2-030,
61010-2-033, 61010-031; CERTIFIED TO CSA STD.
C22.2 No.61010-1,61010-2-030, 61010-2-033, 61010-031.
