Jaycar QM1327 User manual

DIGITAL MULTIMETER
Users Manual
Table of Contents
1. Introduction
2. Safety note
3. Explanation of Controls and Indicators
3-1. Product illustration
3-2. Functional push button
3-3. LCD display
4. Specification
4-1. General Specification
4-1. Electrical Specification
5. Measurement operation
5-1 DC voltage & AC voltage measurement
5-2. Resistance measurement
5-3. Diode & Continuity check
5-4. Frequency Measurement
5-5. DC/AC mA measurement
5-6. DC/AC 10A measurement
5-7 Temperature measurement
5-8 Detecting AC electric field
6. Maintenance
6-1. Replacing the battery
6-2. Replacing the fuse
6-3. Cleaning and Decontamination

1. Introduction
This manual is used to MS8233F Digital Muti Meter only..
This Meter is a handheld and battery operated Digital Multi Meter(DMM) with
multi function. This Meter is designed to meet IEC61010-1 & CAT III 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.
Protection provided by the instrument will be impaired if used in a manner not
specified by the manufacturer.
This operating instruction covers information on safety and caution. Please
read relevant information carefully and observe all the warnings and note
strictly.
The DMM as general measurement tool and widely used in the school,
laboratory, factory and other social field.
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.
Hazardous voltages in the test before measurement of what is known
voltage to determine that determine that the equipment is functioning
correctly.
Note international Electrical Symbol.
Dangerous Voltage
Ground
AC （Alternating
current）
Warning see
explain in manual
DC (Direct Current) Double insulation
AC or DC Fuse
This product has been tested to the requirements ofC
AN/CSA-C22.2 No. 61010-1, second edition, including
Amendment 1, or a later version of the same standard
incorporating the same level of testing requirements”.
CONFORMS TO UL STD. 61010-1,
IEC 61010-031
CERTIFIED TO CSA STD. C22.2 No. 61010-1 and
61010-031

Measurement category(over voltage category):
This instrument is meet the safety condition of CAT III. 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
① NCV indicator [LED]
② LCD display
③ “Hz%” push button
④ “BACK LIGHT” push button
⑤ ‘HOLD” push button
⑥ “FUNC” Push button
⑦ Rotary Switch (Knob)
⑧ “V/Ω/Hz/uA/mA/℃”Input terminal
⑨“COM” input terminal
⑩“10A” input terminal
10
9
8
7
6
5
4
3
2
1
Fig.1 Exteriorview

3-2. Functional push button
Push 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
and ℃/℉.
HOLD Press “HOLD” to enter and exit the hold mode in any mode.
That act with trigger.
Hz% This key is act with trigger the duty function
*
This key is used control Backlight. This key is act with
trigger. When press and hold the key over 2 sec, will enable
Backlight.
Press the key again , the backlight will disable.
3-3. Display indicators
Fig. 2 LCD
Number Indicator Meaning
1 DC voltage or current
2 AC voltage or current
3 Diode
4 MAX Maximum value
5 HOLD Data hold
6 Low battery indicator
7 MKΩΩKΩMΩis unit of resistance
8 ℉The unit of temperature
( ℉: Fahrenheit)
9 µmVA mV ,V is unit of voltage
µA, mA, A is unit of current
10 －Indicate negative reading
11 Hz Frequency Unit
12 nF, µF Capacitance unit

4．Specification
4-1. General Specification
●Auto ranging DMM , that full scale is 4000 counts
●Display : 3 3/4 digit LCD display..
●Over load protection: Used the PTC protection circuit for Resistance,
temperatureand frequency measurement.
●AC electric field detection function(NCV function)
●DATA HOLD function
●Back Light
●Low battery indication
●Auto Power- OFF. : If the meter is idle for 15 minutes (idle time), the meter
automatically turns the power off. After auto power-off, pushing any of the push
button or changing the rotary switch can turn on the meter again.
●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 III 600V.
●Dimension (L x W x H) & Weight: 140 x 67 x 30mm, Approx. 112g
Accessary: 1. K-type temperature probe
2. Multi-Function Socket: MS3204
4-2. Electrical Specification ( at 23±5℃; <75% RH)
4.2.1 DC Voltage
Range Resolution Accuracy
400mV 0.1mV
4V 0.001V
40V 0.01V
400V 0.1V
±（0.5% rdg + 2dgt）
600V 1V ±（0.8% rdg + 2dgt）
- 8 -
4.2.2 AC Voltage
Range Resolution Accuracy
4V 0.001V
40V 0.01V
400V 0.1V
±（0.8% rdg + 3dgt）
600V 1V ±（1.0% rdg + 3dgt）
* Frequency response: 40～400Hz
* Average rectifier type.
4.2.3 Resistance
Range Resolution Accuracy
400Ω0.1Ω
4kΩ0.001kΩ
40kΩ0.01kΩ
400kΩ0.1kΩ
±（0.8% rdg + 2dgt）
4MΩ0.001MΩ
40MΩ0.01MΩ
±（1.0% rdg + 2dgt）

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 30Ω, will
buzzer is sounded.
* Open voltage: about 0.5V
4.2.6 DC Current
Range Resolution Accuracy
400µA 0.1μA
4000µA 1µA
40mA 0.01mA
400mA 0.1mA
10A 0.01A

±（1% rdg + 3dgt）
* Over Load protection：use the fuse(F400mA H 250V) at µA /mA range,
andusethefuse(F10A H 250V) at 10A range.
* Max input current:：200mA at ‘mA’ input terminal and 10A at ‘10A’ input
terminal.. .
4.2.7 AC Current
Range Resolution Accuracy
400µA 0.1µA
4000µA 1µA
（1.2% rdg + 4dgt）

40mA 0.01mA
400mA 0.1mA
10A 0.01A
* Over Load protection：use the fuse(F400mA H 250V) at µA /mA range,
andusethefuse(F10A H 250V) at 10A range.
* Max input current:：400mA at ‘mA’ input terminal and 10A at ‘10A’ input
terminal.. .
* Frequency response：40 ～400Hz
4.2.8 Temperature
Fahrenheit Temperature [℉]
Range 0℉~1800℉
Resolution 1℉
-0℉~50℉（5% rdg + 4dgt）
Accuracy 50℉~750℉（1.5% rdg + 3dgt）
750℉~1800℉（3% rdg + 3dgt）
4.2.9 Frequency
Range Accuracy
0.1Hz~10M
Hz 0.1Hz~10MHz
* Sensitivity：3V

4.2.10 Duty
Range Accuracy
0.1%~99% 1%
4.2.11 capacitance
Range Resolution Accuracy
4nF 0.001nF
40nF 0.01nF
400nF 0.1nF
4µF 1nF
40µF 10nF

±（3% rdg + 3dgt）
200µF 100nf
Range Accuracy
0.1Hz~10M
Hz 0.1Hz~10MHz
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 400.0mV, 4.000V, 40.00V , 400.0V and 600V and
then. The AC voltage ranges are 4.000V, 40.00V, 400.0V and 600V.
To measure DC or AC voltage:
1. Insert the red test lead into the “VΩ” input terminal and the black test
lead into the COM terminal.
2. Set the rotary switch to DC orAC range.
3. Connect the test lead across with the object under testing.
The measured value will be show 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: 400.0Ω, 4.000KΩ,40.00KΩ, 400.0KΩ,
4.000MΩ.
40.00MΩ.
To measure resistance, connect the meter as follows:
1. Insert the red test lead into the ”VΩ” terminal and the black test lead into
the COM terminal.
2. Set the rotary switch to proper resistance range..
3. Connect 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 0.1 Ωto 0.2 Ωof error to resistance

measurement. To obtain precision reading in low-resistance
measurement, that is the range of 400.0Ω, short the input terminal
before measuring. In this time, the contact resistance displayed on the
LCD. You can subtract the 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
① Set the rotary switch to “ ” position. First time, default
mode is diode check mode. You can enter the continuity check mode
by the “ FUNC” Key.
② insert the red test lead into the “VΩ”terminal and the black test lead
into the “COM” terminal.
③ Use 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.
④ For 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.
⑤ Reverse 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.
Continuity Check: Press the “FUNC” key to enter to the continuity
mode.
⑥ The buzzer sound if the resistance of a circuit under test is less than
30Ω.
5-4. Frequency measurement
1. Set the rotary switch to “Hz” position.
2. Insert the red test lead into the “ VΩHz” input terminal and the
black test lead into the “COM” terminal.
3. Connect the test leads across with the circuit under testing. The
measured value shown.
on the LCD display.
5-5. DC/AC µA or mA measurement
DC Current range is 400.0µA/4000µA and 40.00mA,/400.0mA and
then 10A range.
AC Current range is 400.0µA/4000µA and 40.00mA,/400.0mA and
then 10A range.
1. Turn off power to the circuit. Set the rotary switch to the proper
DC/AC µA or DC/AC mA position.
2. Break 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.
3. Turn on power to the circuit. The measured value show on the display.

5-6. DC/AC 10A measurement
1. Insert the red test lead into the input terminal marked as “10A”.
2. The measuring procedure is same asthatof 5-5section..
Mode except for OFF when electric field exceeding AC 110V is detected by the
metal piece sensor
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.
5-7 Temperature measurement
To measuring temperature must be use the Type Special Socket：MS3204.
1. Set the rotary switch to the “TEMP” range. In this time, The
environment temperature value displayed on the LCD.
2. Insert the Socket to the two “COM” and “TEMP” terminals.
3. Insert the K-type temperature probe to the two insert holes of Socket.
User should be take note of it’s polarity.
4. The measured temperature value will be displayed on the LCD.
5-8 Capactiance measurement
4. Set the rotary switch to “capactiance” position.
5. Insert the red test lead into the “ VΩHz” input terminal and the
black test lead into the “COM” terminal.
6. Connect the test leads across with the circuit under testing. The
measured value shown.
on the LCD display.
5-9 Detecting AC electric field [ NCV function]
The red LED on the upper area on the front panel lights up and then flickering
at all function
that is incoporated in the inner upper area of front case.
It indicates a presence of AC voltage in an electrical cricuit or equipment
without touching them. Detectuib against in-wall outlet is possible.
NOTE: In the some time, when measuring AC voltage, the red LED is lights.
You should be ignore this.
6. Maintenance
6-1. Replacing the battery
When meter display the battery must be replace to maintain
normal operation.
① Disconnect and remove all test probes from any live
source and meter.
② Open the battery cover on the bottom case by
screwdriver.
③ Remove old battery and snap new one into battery
holder
warning TO AVOID ELECTRICAL SHOCK, REMOVE TEST LEADS BEFORE OPENING
BATTERY COVER.
RISQUE DE CHOC ÉLECTRIQUE, RETIRER CORDONS DE MESURE D'OUVERTURE AVANT
couvercle des piles.

6-2. Fuse replacement
Replacing the defective fuse should the done according to the following
procedure.
i. To avoid electrical shock, remove the test lead and any input
signal before opening the bottom case.
ii. Open the botton case and then remove the defective fuse and
insert a new fuse of the same size and rating（F400mA H250V or
F10A H250V）.
iii. Replace the bottom case and reinstall all the screw.
6-3. Test lead replacement
The test lead has been used and replaced shall be comply with the requirements
specified by the manufacturer in order to ensure operation safety,(1000V CATII
10A)
6-4.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.
END —