Crenova MS8233D User manual

Contents
1. Introduction ………………………………………………. 1
2. Safety note ……………………………………………..… 1
3. Explanation of Controls and Indicators …………………... 2
3-1. Product illustration ………………………………………. 2
3-2. Functional button …………………………………………. 3
3-3. LCD display symbol ………………………….……………3
4. Specification ………………………………………………. 4
4-1. General Specification ……………………………………... 4
4-2. Electrical Specification …………………………………. 5
5. Measurement operation ………………………………….. 8
5-1 DC voltage & AC voltage measurement ………………... 8
5-2. Resistance measurement …………………………….….. 9
5-3. Diode & Continuity check ………………………..…..… 9
5-4. Frequency Measurement [ Only for MS8233D ] …….…… 9
5-5. DC/AC µA or mA measurement ………………….……. 10
5-6. DC/AC 10A measurement …………………………..…. 10
6. Maintenance ……………………………………………….10
6-1. Replacing the battery …………………………...………. 10
6-2. Replacing the fuse ………………………………………. 11
6-3. Cleaning and Decontamination …………………………. 11
7. Warranty ………………………………………………. 11

1. Introduction
This manual is used to MS8233D Digital Multi Meter.
This Meter is a handheld and battery operated Digital Multi Meter (DMM) with
multi function. This Meter is designed to meet IEC61010-1 & CAT II 600V over
voltage category and double insulation. The meter with holster that is giving the
main body, though downsized, high resistance against the shock of a drop.
The DMM as general measurement tool and widely used in the school, laboratory,
factory and other social field.
This operating instruction covers information on safety and caution.
Please read relevant information carefully and observe all the warnings and
note strictly.
2. Safety note
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 rule:
Do not apply more than the rated voltage, of marked on the
meter, between the input terminal and grounding terminal..
Do not apply voltage between COM and OHM terminal, in the
resistance measuring state.
Do not measure current with test lead inserted into voltage or
OHM terminal.
Do not expose the instrument to the direct sun light, extreme
temperature and humidity or dew full.
Inspect the test lead for damaged insulation or exposed metal.
Before measuring current, check the Meter’s fuses and turn off
power to the circuit before connecting the meter to the circuit.
Disconnect circuit power and discharge all high voltage
capacitors before testing continuity, diode, resistance, capacitance
or current.
Note international Electrical Symbol.
1

Dangerous Voltage
Ground
AC Alternating
current
Warning
see explain in manual
DC (Direct
Current)
Double insulation
AC or DC
Fuse
Measurement category(over voltage category):
This instrument is meet the safety condition of CAT II. The equipment is
used for measurement in building facilities. Examples are measurements
on distribution boards, circuit breaker and industrial equipment located in
fixed facilities, as a fixed motor.
3. Explanation of controls and indicators
3-1. Meter illustration
2

Fig. 1 Exterior view
1. LCD display 2. “MAX” button 3. “BACK LIGHT” button
4. ‘HOLD” button 5. “FUNC” button 6. Rotary Switch (Knob)
7. “V/Ω/HZ/uA/mA” input terminal 8. “COM” input terminal
9. “10A” input terminal
3-2. Functional button
Button
Function
FUNC
“FUNC” key is the function select key that acts with
trigger. Use the key as switch of DC/AC current,
Diode/Continuity.
HOLD
Press “HOLD” to enter and exit the hold mode in any
mode. That act with trigger.
MAX
This button is act with trigger. Press this button once, the
maximum value is holding (will display ‘MAX’symbol
in the LCD).
After pressing the button, A/D will keep working, and
the display value are always updated and kept the
maximum value.
NOTE: The actual gained value is not the peak value.
This button is used to control Backlight. This button is
act with trigger. When press and hold the button over 2
sec, will enable Backlight.
Press the button again , the backlight will turn off.
3-3. Display indicators
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Fig. 2 LCD
Indicator
Meaning
DC voltage or current
AC voltage or current
Diode
MAX
Maximum value
HOLD
Data hold
Low battery indicator
MKΩ
ΩKΩMΩis unit of resistance
µmVA
mV ,V is unit of voltage
µA, mA, A is unit of current
－
Indicate negative reading
4．Specification
4-1. General Specification
●Auto ranging DMM , that full scale is 2000 counts.
●Display : 3 1/2 digit LCD display.
●Over load protection: Use the PTC protection circuit for Resistance, and
frequency measurement.
●DATA HOLD function.
●MAX value hold function.
●Back Light.
●Low battery indication.
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●Auto Power OFF: If the meter is idle for 15 minutes (idle time), the meter
automatically turns off. After auto power-off, pushing any of the push button
or changing the rotary switch can turn on the meter again.
NOTE:（1）After auto power off in the AC mode, if changing the rotary switch to
the DC mode, the Re-power on if disabled.
(2) The meter enters sleep mode after quto power off. If press
“HOLD” push button to re-power on in the sleep mode, the auto
power off function is disabled.
●Operating temperature & Humidity:
0 ~ 40℃(32 ~104 ℉) & < 80% RH
●Storage temperature & Humidity:
-10 ~ 50℃(14 ~ 122 ℉) & <70%RH
●Power Supply: 9V Battery(6F22 or 1604A Type) x 1pc.
●Safety Class: IEC 61010-1, CAT II 600V.
●Dimension(L x W x H) & Weight:140 x 67 x 30mm, Approx. 112g
4.1.1 Accessary:
1. User’s Manual ---------------------------- 1pc
2. Test lead ---------------------------- 1set
3. 9V Battery ------------------------------ 1pc
4-2. Electrical Specification ( at 23±5℃; <75% RH)
4.2.1 DC Voltage
Range
Resolution
Accuracy
200mV
0.1mV
±（0.5% rdg + 2dgt）
2V
0.001V
20V
0.01V
200V
0.1V
600V
1V
±（0.8% rdg + 2dgt）
* Over load protection: Maximum 600V DC or AC RMS
4.2.2 AC Voltage
Range
Resolution
Accuracy
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2V (40Hz-400Hz)
0.001V
±（0.9% rdg + 3dgt）
20V (40Hz-400Hz)
0.01V
200V (40Hz-400Hz)
0.1V
600V (40Hz-200Hz)
1V
±（1.2% ）rdg + 3dgt
* Over load protection: Maximum 600V DC or AC RMS
4.2.3 Resistance
Range
Resolution
Accuracy
200Ω
0.1Ω
±（0.8% rdg + 2dgt）
2kΩ
0.001kΩ
20kΩ
0.01kΩ
200kΩ
0.1kΩ
2MΩ
0.001MΩ
±（1.0% rdg + 2dgt）
20MΩ
0.01MΩ
4.2.4 Diode check
Range
Resolution
Function
0.001V
Will display the forward drop voltage.
* Operating current：about 1mA
* Open circuit voltage：about 1.48V
4.2.5 Continuity
Range
Function
If measured resistance less than 100Ω, will buzzer is sounded.
* Open voltage: about 0.5V
4.2.6 DC Current
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Range
Resolution
Accuracy
200µA
0.1μA
±（1.5% rdg + 3dgt）
2000µA
1µA
20mA
0.01mA
200mA
0.1mA
10A
0.01A
* Over Load protection：use the fuse(F250mA/250V) at µA /mA range,
and use the fuse(F10A/250V) at 10A range.
* Max input current: ：250mA at ‘mA’ input terminal and 10A at ‘10A’ input
terminal.
4.2.7 AC Current [40Hz-400Hz]
Range
Resolution
Accuracy
200µA
0.1µA
（1.5% rdg + 4dgt）
2000µA
1µA
20mA
0.01mA
200mA
0.1mA
10A
0.01A
* Over Load protection：Use the fuse (F250mA/250V) at µA /mA range, and use
the fuse(F10A/250V) at 10A range.
* Max input current: ：250mA at ‘mA’ input terminal and 10A at ‘10A’ input
terminal...
* Frequency response：40 ～400Hz
4.2.8 Frequency
Range
Resolution
Accuracy
20kHz
10 KHz
±（1.5%rdg+5dgt）
* Sensitivity：0.8V
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5. Measurement operation
5-1 DC & AC voltage measurement
Warning:
To avoid harms to you or damage to the meter from electric shock. Please
do not attempt to measure voltage higher than DC/AC 1000V although
readings may be obtained.
The DC voltage range are 200.0mV, 2.000V, 20.00V , 200.0V and 600V and
then. The AC voltage ranges are 2.000V, 20.00V, 200.0V and 600V.
To measure DC or AC voltage:
①Insert the red test lead into the “VΩ” input terminal and the black test lead
into the COM terminal.
②Set the rotary switch to DC or AC range.
③Connect the test lead across with the object under testing. The measured
value will be shown on the LCD display.
Note:
When DC or AC voltage measurement has been completed, disconnect the
connection between the testing lead and the circuit under testing.
5-2. Resistance measurement
The resistance range are: 200.0Ω, 2.000KΩ,20.00KΩ, 200.0KΩ, 2.000M
Ω.20.00MΩ.
To measure resistance, connect the meter as follows:
①Insert the red test lead into the ”VΩ” terminal and the black test lead into
the COM terminal.
②Set the rotary switch to proper resistance range..
③Connect the test lead across with the object under testing.
The measured value will be show on the LCD display.
Note:
●The test lead can add 0.1Ωto 0.2Ωof error to resistance measurement.
To obtain precision reading in low-resistance measurement, that is the
range of 200.0Ω, short the input terminal before measuring. In this time,
the contact resistance displayed on the LCD. You can subtract the
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contact resistance value from the measured value.
●For high-resistance measurement (>10MΩ), it is normal taking several
second to obtain stable reading.
●The LCD display “OL” indicating open-circuit for the tested resistor or
the resistor value is higher than the maximum range of the meter.
5-3. Diode/Continuity check
5.3.1. Diode
①Set the rotary switch to “ ” position. First time, default mode is
diode check mode. You can enter the continuity check mode by the
“ FUNC” Key.
②insert the red test lead into the “VΩ”terminal and the black test lead into
the “COM” terminal.
③Use the diode test mode to check diodes, transistors and other
semiconductor device. In the diode test mode sends a current through the
semiconductor junction, and the measure the voltage drop across the
junction. A good silicon junction drop between 0.5V and 0.8V.
④For forward voltage drop reading on any semiconductor component, place
the red test lead on the component anode and place the black test lead on
the component cathode. The measured value show on the display.
⑤Reverse the test lead and measure the voltage across the diode again.
●If diode is good, the display shows “OL”.
●If diode is shorted, the display shows 0 (zero) in both direction.
●If display shows “OL” in both direction, the diode is open.
5.3.2. Continuity Check:
①Press the “FUNC” key to enter to the continuity mode.
②The buzzer sound if the resistance of a circuit under test is less than 100Ω.
5-4. Frequency measurement
①Set the rotary switch to “Hz” position.
②Insert the red test lead into the “ VΩHz” input terminal and the black test
lead into the “COM” terminal.
③Connect the test leads across with the circuit under testing. The measured
value shown on the LCD display.
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NOTE: Input signal level must be higher than 0.5V (it is sensitivity).
5-5. DC/AC µA or mA measurement
DC Current range is 200.0µA/2000µA and 20.00mA,/200.0mA and then 10A
range.
AC Current range is 200.0µA/2000µA and 20.00mA,/200.0mA and then 10A
range.
①Turn off power to the circuit. Set the rotary switch to the proper
DC/AC µA or DC/AC mA position.
②Break the current path to be tested. Connect the red test lead to the
more positive side of the break and the black test lead to the more
negative side of the break.
③Turn on power to the circuit. The measured value show on the display.
5-6. DC/AC 10A measurement
①Insert the red test lead into the input terminal marked as “10A”.
②The measuring procedure is same as that of 5-5 section..
Note:
●For safety’s sake, the measuring time for high current should be ≤10 second
for each measurement and the interval time between two measurement should
be greater than 5 minutes.
●When current measurement has been completed, disconnect the connection
between the testing lead and the circuit under test.
6. Maintenance
6-1. Replacing the battery
When meter display the battery must be replace to maintain
normal operation.
①Disconnect and remove all test probes from any live source and meter.
②Open the battery cover on the bottom case by screwdriver.
③Remove old battery and snap new one into battery holder
6-2. Fuse replacement
Replacing the defective fuse should the done according to the following
10

procedure.
①To avoid electrical shock, remove the test lead and any input signal
before opening the bottom case.
②Open the button case and then remove the defective fuse and insert a
new fuse of the same size and rating.
③Replace the bottom case and reinstall all the screw.
6-3.Cleaning and Decontamination
The meter can be cleaned with soft clean cloth to remove any oil, grease or
grim. Do not use liquid solvent or detergent.
7. Warranty
We provide 1 year warranty and lifetime customer support for this multimeter, if
you met any problems when using the mulimeter please feel free to contact us
through amazon message or manufacturer Crenova Facebook.
http://www.facebook.com/icrenova/
Warning, Safe operating is very improtant.
Please follow the instruction when orperate the multimeter!!!
Please pay more attention to all the Note and Warning!!!
Please not test the item which has been over the test range!!!
Please use it in the safe way!!!
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