MS 8230B
Safety Information
DIGITAL MULTIMETER
INSTRUCTION MANUAL
To ensure safe operation, and in order to exploit to the full the
functionality of the meter, please follow the directions in this
section carefully.
This multimeter has been designed according to IEC-1010
DIGITAL MULTIMETER
concerning electronic measuring instruments with an over voltage
category CAT II 1000V, CAT III 600V and pollution 2.
Follow all safety and operating instructions to ensure that the
meter is used safely and is kept in good operating condition.
With proper use and care, the digital meter will give you years of
satisfactory service.
• Preliminary
— When using the meter, the user must observe all normal safety
MS 8230B
rules concerning:
Protection against the dangers of electrical current.
OFF
V
1000
750
Protection of the meter against misuse.
200
200
A
V
— When the meter is delivered, check that it has not been
20
200µ
damaged in transit.
2
2m
— When poor condition under harsh preservation or shipping
conditions caused, inspect and confirm this meter without delay.
200m
20m
— Test leads must be in good condition. Before using verify that
2M
200m
the insulation on test leads is not damaged and/or the leads
wire is not exposed.
200k
10A
— Full compliance with safety standards can be guaranteed only
Ω
20k
h
FE
if used with test leads supplied. If necessary, they must be
2k
E
C
B E
200
replaced with the same model or same electric ratings.
NPN
600V CAT III
PNP
1000V CAT II
• During Use
VΩmA
10ADC
COM
— Before using, you must select the right input jack, function and
range.
FUSED
— Never exceed the protection limit values indicated in
MAX 10A
MAX 200mA
UNFUSED
1000V 750V
specifications for each range of measurement.
— When the value scale to be measured is unknown beforehand,
set the range selector at the highest position.
— Do not measure voltage if the voltage on the terminals exceeds
1000V above earth ground.
— Always be careful when working with voltages above 60V DC or
Warning
30V AC rms, keep fingers behind the probe barriers while
measuring.
— Before rotating the transform switch to change functions and
ranges, disconnect test leads from the circuit under test.
— Never perform resistance, transistor and diode measurements
on live circuits.
— Never use the meter under the condition of the explosive air,
steam or dirt.
— If any faults or abnormalities are observed, the meter can not be
used any more and it has to be checked out.
— Never use the meter unless the rear case is in place and fastened
fully.
— Please do not store or use meter in areas exposed to direct
sunlight, high temperature, humidity or condensation.
• Symbols
Important safety information, refer to the operating
manual.
Double insulation (Protection class II).
Overvoltage (Installation) category II, Pollution Degree 2
CAT II
per IEC1010-1 refers to the level of Impulse Withstand
Voltage protection provided.
CAT III
Overvoltage (Installation) category III, Pollution Degree 2
per IEC1010-1 refers to the level of Impulse Withstand
Voltage protection provided.
High voltage warning symbol
Conforms to european union directive
Earth ground
Fuse
Alternating current
01
02
Direct current
FRONT PANEL
Diode
This indicates that the display data is being held.
• Names of
The battery is not sufficient for proper operation.
Components
• Maintenance
1
LCD Display
-Please do not attempt to adjust or repair the meter by removing
the rear case while voltage is being applied. A technician who
2
Panel
fully understands danger involved should only carry out such
3
H Button:
actions.
This Button is
— Before opening the battery cover or case of the meter, always
disconnect test leads from all tested circuits.
used to the switch
— To avoid the wrong reading causing electricity attack, when the
of data hold.
meter displays «
«, you must change the battery.
— For continue protection against fire, replace fuse only with the
4
Transform Switch:
specified voltage and current ratings: F 200mA/250V (quick acting).
This switch is used
— Do not use abrasives or solvents on the meter, use a damp cloth
to select functions
and mild detergent only.
— Always set the power switch to the OFF position when the meter
and desired ranges.
is not in use.
5
10A Jack:
— If the meter is to be stored for a long period of time, the batteries
should be removed to prevent damage to the unit.
Input terminal
• Description
for current 0 ~ 10A.
— This meter is a portable professional measuring instrument with
6
COM Jack:
handsome LCD easily reading.
Common terminal
— Single operation of a transform switch makes measurement
convenient. Overload protection and low battery indication are
for measurement.
provided, this meter is ideal for use in the fields, workshop,
hFE Jack:
7
school, hobby and home applications.
This Jack is used to
— This meter is with the functions of data hold.
transistor test.
8
V/Ω/mA Jack:
Input Jack
03
• Specifications
Accuracy is specified for a period of year after calibration and at
18°C to 28°C (64°F to 82°F) with relative humidity to 75%.
1
• General Specifications
— Max. Voltage Between Terminals And Earth Ground: 1000V DC
DIGITAL MULTIMETER
or 750V AC
— Fuse Protection: F 200mA/250V (quick acting).
2
— Display: 15mm LCD
— Max. Show Value: 1999 (3 1/2)
— Polarity Indication: ‘-‘indicates negative polarity.
3
— Overrange Indication: Display ‘1’
— Sampling Time: approx. 0.4 second
4
— Low Battery Indication: «
«displayed
MS 8230B
— Power Supply: 1.5V×3 AAA battery.
— Operating Temperature: 0°C to 40°C (32°F to 104°F)
OFF
— Storage Temperature: -10°C to 50°C (10°F to 122°F)
V
750
5
1000
— Dimension & Weight: 158×74×32 mm, 250g (including battery)
200
200
V
A
20
200µ
• Electrical Specifications
6
2m
2
Circumstance Temperature: 23±5°C, Relative Humidity: < 75%
DC Voltage
200m
20m
7
Range
Resolution
2M
200m
200mV
0.1mV
±(0.5% of rdg + 2 digits)
200k
10A
2V
0.001V
±(0.5% of rdg + 3 digits)
20k
Ω
h
FE
20V
0.01V
2k
E
C
B E
±(0.8% of rdg + 3 digits)
200
200V
0.1V
NPN
600V CAT III
PNP
1000V
1V
±(0.8% of rdg + 5 digits)
1000V CAT II
8
10ADC
COM
VΩmA
— Input Impedance: 1MΩ
— Overload Protection: 200mV range: 250V DC or AC rms,
FUSED
2V-1000V ranges: 1000V DC or 750VAC rms.
MAX 200mA
MAX 10A
UNFUSED
1000V 750V
— Max. Input Voltage: 1000V DC
04
05
Accuracy
-
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AC Voltage
— Open Circuit Voltage: 2.8V
— Overload Protection: 250V DC or rms AC
Range
Resolution
Accuracy
Transistor hFE
200V
0.1V
±(1.2% of rdg + 10 digits)
750V
1V
Range
— Input Impedance: 1MΩ
hFE
— Overload Protection: 750V AC rms or 1000V DC
— Frequency Range: 40 to 400Hz
— Base Current: approx. 2µA, Vce: approx. 2.8V
— Response: Average, calibrated in rms of sine wave.
— Max. Input Voltage: 750V rms AC
Diode
• Data Hold
Range
Resolution
Function
If you need data hold when measuring, you can put on «H» button,
Display :read approximate forward
0.001V
it will hold the reading; if you put the button again, data hold is not
voltage of diode
continue.
— Forward DC Current: approx. 1mA
• Preparation For Measurement
— Reversed DC Voltage: approx.2.8V
— Overload Protection: 250V DC or rms AC
— Turn on the meter. If the battery voltage is less than 3.6V, display
DC Current
will show «
Range
Resolution
Accuracy
— The «
» besides the input jack shows that the input voltage or
200µA
0.1µA
current should be less than specification on the sticker of the
±(1.0% of rdg + 2 digits)
meter to protect the inner circuit from damaging.
2mA
0.001mA
— Select a function and a range for the item to be measured through
20mA
0.01mA
±(1.5% of rdg + 2 digits)
rotating the transform switch accordingly. When the value scale
200mA
0.1mA
to be measured is unknown beforehand, set the range selector at
±(3.0% of rdg + 2 digits)
10A
0.01A
the highest position.
— Overload Protection: μA, mA ranges: F 200mA/250V fuse
— When connection, first connect to the public testing line, then to
(quick acting), 10A range: unfused.
the electriferous testing line. When you’ll remove it, you should
— Max. Input Current: mA Jack: 200mA, 10A Jack: 10A
remove the elecriferous one.
— voltage drop: 200mV
• Measuring DC Voltage
Resistance
Range
Resolution
Accuracy
200Ω
0.1Ω
±(1.0% of rdg + 3 digits)
You can’t input the voltage which more than 1000V DC, it’s possible
2kΩ
0.001kΩ
to show higher voltage, but it’s may destroy the inner circuit.
20kΩ
0.01kΩ
Pay attention not to get an electric shock when measuring high
±(1.0% of rdg + 2 digits)
200kΩ
0.1kΩ
voltage.
2ΜΩ
0.001ΜΩ
06
— Connect the black test lead to the COM jack and the red test lead
to the V jack.
— Set the transform switch at the
— Connect test leads across the source or load under measurement.
Function
— You can get a reading from LCD display. The polarity of the red
Display: read approximate hFE value (0-1000)
test lead connection will be indicated.
of transistor under test (ALL TYPE)
• Note:
— When only the figure ‘1’ is displayed, it indicates overrange
situation and the higher range has to be selected.
— When the value scale to be measured is unknown beforehand,
set the range selector at the highest position.
• Measuring AC Voltage
— Connect the black test lead to the COM jack and the red test lead
to the V jack.
— Set the transform switch at the V range position.
— Connect test leads across the source or load under measurement.
— You can get reading from LCD.
«, the battery should be changed at this time.
• Measuring AC Voltage
You can’t input the voltage which more than 750V rms AC, it’s
possible to show higher voltage, but it’s may destroy the inner circuit.
Pay attention not to get an electric shock when measuring voltage.
• Note:
— When only the figure ‘1’ is displayed, it indicates overrange
situation and the higher range has to be selected.
— When the value scale to be measured is unknown beforehand,
set the range selector at the highest position.
Warning
• Measuring DC Current
Shut down the power of the tested circuit, then connect the
meter with the circuit for measurement.
07
— Connect the black test lead to the COM jack and the red test lead
to the mA jack for a maximum of 200mA current. For a maximum
V range position.
of 10A, move the red lead to the 10A jack.
— Set the transform switch at the
A range position.
— Connect test leads in series with the load under measurement.
— You can get reading from LCD. The polarity of red test lead will
be indicated.
• Note:
— When only the figure ‘OL’ is displayed, it indicates over range
situation and the higher range has to be selected.
— When the value scale to be measured is unknown beforehand,
set therange selector at the highest position.
— «
» means the socket of INPUT maximum current is 200mA,
over current will destroy the fuse. 10A’s maximum current is 10A,
no fuse protection.
• Measuring Resistance
Warning
When measuring in-circuit resistance, be sure the circuit under
test has all power removed and that all capacitors have been
Warning
discharged fully.
— Connect the black test lead to the COM jack and the red test lead
to the Ω jack.
— Set the transform switch at the Ω range position.
— Connect test leads across the resistance under measurement.
— You can get reading from LCD.
• Note:
— When only the figure ‘1’ is displayed, it indicates overrange
situation and the higher range has to be selected.
— When the input is not connected, i.e. at open circuit, the figure ‘1’
will be displayed for the overrange condition.
Warning
• Testing Diode
— Connect the black test lead to the COM jack and the red test lead
to the Ω jack. (The polarity of red lead is «+»)
08
09
— Set the transform switch at the
range position.
— Connect the red lead to the anode, the black lead to the cathode
of the diode under testing.
Before attempting open the battery cover of the meter, be sure
— You can get reading from LCD.
that test leads have been disconnected from measurement
circuit to avoid electric shock hazard.
• Note:
For protection against fire, replace fuses only with specified
— The meter will show the approximate forward voltage drop of the
ratings: F 200mA/250V (quick acting).
diode.
— If the lead connection is reversed, only figure’1’will be displayed.
• Test Leads Replacement
— When the input is not connected, i.e. at open circuit, the figure ‘1’
will be displayed.
• Testing Transistor
Full in compliance with safety standards can be guaranteed
— Set the transform switch at the hFE range position.
only if used with test leads supplied. If necessary, they must
— Identify whether the transistor is NPN or PNP type and insert
be replaced with the same model or same electric ratings.
emitter, base and collector leads into the proper holes of the
Electric ratings of the test leads: 1000V 10A.
transistor on the socket for testing.
— You can get reading from LCD.
You must be replaced the test leads if the lead is exposed.
Maintenance
Accessories
• Battery Replacement
1
Test Leads: Electric Ratings 1000V 10A
2
Warning
3
Before attempting open the battery cover of the meter, be sure that
test leads have been disconnected from measurement circuit to
avoid electric shock hazard.
— Loosen the screw fixing the battery cover and remove it.
— Replace the exhausted battery with a new one.
— Put the battery cover as its origin.
• Fuse Replacement
— Loosen the screw fixing the battery cover and remove it.
— Replace the blown fuse with ratings specified.
— Put the battery cover as its origin.
10
Warning
Warning
one piece
Battery:1.5V, AAA
three pieces
Instruction Manual
one piece
HYS006725
11