1
36C
DMM OPERATOR’S MANUAL
1. Overview
The multimeter is characterized at slim size, portable, stable performance and
anti-dropping capacity. Using 3½ digits LCD monitor with character 16mm high,
they offer clear readings. With overall circuitry design centering on
large-scale IC A/D converters in conjunction and over-load protection circuit,
the meters give excellent performance and exquisite making as a handy utility
instrument.
The meters can be used to measure DC & AC voltage, DC & AC current,
resistance, capacitor, battery positive diode voltage fall, hfe parameters for
transistor and Continuity.
2. Panel Layout
① LCD Display: 3½ digits, character 16mm high
② Data-hold Switch (HOLD)
③ Back Light Button Switch: Press this button to switch on back light If the
dark circumstance light makes the reading difficulty when measuring, the light
will be automatically turned off in 5 seconds. Press again to switch it on again.
If the battery is in weak power, the light will be dimmed.
④ Rotary Switch: use this switch to select functions and ranges
⑤ V Ω mA Cx+ Input Jack、Cx- Input Jack、COM Input Jack
3. Safety Information
3-1 The meters are designed according to IEC-1010 concerning electronic
measuring instruments with an over-voltage category (CAT Ⅱ) and pollution
2.
3-2 Follow all safety and operating instructions to ensure that the meter is
used safely and is kept in good operating condition.
3-3 safety symbols:
important safety information, refer to the operating manual.
Dangerous voltage may be presence.
Double insulation (protection Class II)
4. Special Cautions for Operation
4-1 The meters can be safe only according to standard procedures when used
in conjunctions with the supplied test leads. To replace damaged test leads
with only the same model or same electric specifications.
4-2 To avid risk of electric shock, do not use the meters before the cover is in
place.
4-3 The range switch should be right position for the testing.
4-4 To avoid electric shock and damaging the instruments, the input signals
are forbidden to exceed the specified limits.
4-5 When measuring TV set or switched power, attention should be paid to
the possible pulses that may bring destruction to the circuit.
4-6 Range switch position is forbidden to be changed at random during
measurement.
4-7 Take caution against shock in the course ot measuring voltage higher
than DC 60V & AC 30V.
4-8 Protection fuse should be replaced only with same type and same
specification.
5. GENERAL SPECIFICATIONS
5-1 Max Voltage between input terminal and Earth Ground: CAT Ⅱ600V
5-2 Over-range Indication: display “1” for the significant digit.
5-3 Automatic display of negative polarity “_” .
5-4 Low Battery Indication: „ ‟ displayed
5-5 Max LCD display: 1999 (31/2 digits)
5-6 Fuse protection: F-200mA/250V (Ø 5x20mm)
5-7 Power Supply: 9V battery, 6F22 or NEDA 1604
5-8 Operating Temp.: 0℃ to 40℃ (relative humidity <85%)
5-9 Storage Temp.:-10℃ to 50℃ ((relative humidity <85%)
5-10 Guaranteed precision Temp.: 23±5 ℃ (relative humidity <85%)
5-11 Dimension: 143x75x32mm
5-12 Weight: approx. 200g (including battery)
6. Testing Specifications
Accuracy is specified for a period of year after calibration and at 18℃ to 28℃
(64℉ to 82℉) with relative humidity to 75%.
6-1 DC Voltage
range
resolution
accuracy
200mV
0.1mV
±(0.5% of rdg + 17 digit )
20V
10mV
±(0.8% of rdg +18 digits)
600V
1V
±(0.8% of rdg + 18 digits)
-- Input Impendence: 10MΩ
- Overload protection: 250V for 200mV range, effective DC or AC 600V for
other ranges
6-2 AC Voltage
range
resolution
accuracy
200V
100mV
±(1.2% of rdg + 20 digits)
600V
1V
±(1.2% of rdg +20 digits)
-- Frequency Range: 40 to 400Hz
-- Response: average, calibrated in rms of sine wave
6-3 DC Current
range
Resolution
accuracy
200mA
100μA
± (1.5% of rdg +20 digits)
10A
10mA
± (3.0% of rdg +20 digits)
-- Overload protection: F 200mA/250V fuse 10A up to 10 seconds
6-4 AC Current
range
Resolution
accuracy
200mA
100μA
± (1.8% of rdg +20 digits)
10A
10mA
± (3.5% of rdg +25 digits)
10A up to 10 seconds
6-5 Resistance
range
Resolution
accuracy
200Ω
0.1Ω
±(1.5% of rdg + 25 digits)
2kΩ
1Ω
±(0.8% of rdg +20 digits)
20kΩ
10Ω
±(0.8% of rdg +20 digits)
2MΩ
1kΩ
±(2.0% of rdg +25 digits)
-- over-load protection: 250V effective value
6-6 Transistor hFE Test
range
Test Range
Test Current / voltage
NPN & PNP
0-1000
Ib=10μA / Vce=3V
6-7 Diode Test
range
resolution
Function
1mV
-- over-load Protection: 250V effective value
-- forward DC current: approximate 1mA
-- Reversed DC voltage: approximate 3.0V
6-8 Continuity
range
Function
Built-in buzzer will sound if resistance is lover than 50Ω
-- over-load protection: 250V effective value
open circuit voltage: approximate 3.0V
6-9 Capacitor
range
resolution
accuracy
20μF
0.01μF-10μF
0.01μF
±(2.5% of rdg + 30 digits)
10μF-20μF
0.01μF
±(9.0% of rdg + 40 digits)
-- over-load protection: 250V effective value
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6-10 Battery
range
Load resistance
battery by test is good
1.5V
36Ω
more than 33mA.
9V
360Ω
more than 18mA.
12V
450Ω
more than 14mA.
7. OPERATING INSTRUCTIONS
7-1 Attention before operation
7-1-1 Check 9V battery. If the battery voltage is less than 7V, display will show
“ ”, the battery should be replaced at this time to ensure measuring
precision.
7-1-2 Pay attention to the “ ” besides the input jack which shows that the
input voltage or current should be within the specified value.
7-1-3 The range switch should be positioned to desired range for measurement
before operation.
7-2 Measuring DC Voltage
7-2-1 Connect the black test lead to COM jack and the red to VΩmA jack.
7-2-2 Set the rotary switch at the desired V range position.
7-2-3 Connect test leads across the source or load under measurement.
7-2-4 You can get reading from LCD. The polarity of the red lead connection
will be indicated along with the voltage value.
NOTE:
1. When the value scale to be measured is unknown beforehand, set the
range selector at the highest position.
2. When only the figure‟1‟ or „-1‟ is displayed, it indicates over-range
situation and the higher range has to be selected.
3. “ ” means you can‟t input the voltage more than 600V, it‟s possible to
show higher voltage, but it may destroy the inner circuit or pose a shock.
4. Be cautious against shock when measuring high Voltage.
7-3 Measuring AC Voltage
7-3-1 Connect the black test lead to COM jack and the red to VΩmA jack.
7-3-2 Set the rotary switch at the desired V~ range position.
7-3-3 Connect test leads across the source or load under measurement.
7-3-4 You can get reading from LCD.
NOTE:
1. When the value scale to be measured is unknown beforehand, set the
range selector at the highest position.
2. When only the figure‟1‟ or „-1‟ is displayed, it indicates over-range
situation and the higher range has to be selected.
3. “ ” means you can‟t input the voltage more than 600V, it‟s possible to
show higher voltage, but it may destroy the inner circuit or pose a shock.
4. Be cautious against shock when measuring high Voltage.
7-4 Measuring DC/AC Current
7-4-1 Connect the black test lead to COM jack and the red to the VΩmA jack
for a maximum 200mA current,
7-4-2 Set the rotary switch at the desired A /A~ range position.
7-4-3 Connect test leads in series with the load under measurement.
7-4-4 You can get reading from LCD. The polarity of the red lead connection
will be indicated along with the current value.
NOTE:
1. When the value scale to be measured is unknown beforehand, set the range
selector at the highest position.
2. When only the figure‟1‟ or „-1‟ is displayed, it indicates over-range situation
and the higher range has to be selected.
3. “ ” means the socket mA‟s maximum current is 200mA and 10A‟s
maximum current is 10A, over current will destroy the fuse. Since 10A is not
fused, the measuring time should be less than 1 second to prevent precision
from affecting by circuit heating.
7-5 Measuring Resistance
7-5-1 Connect the black test lead to COM jack and the red to VΩmA jack.
7-5-2 Set the rotary switch at the desired Ωrange position.
7-5-3 Connect test leads across the resistance under measurement.
7-5-4 You can get reading from LCD.
NOTE:
1. When only the figure‟1‟ or „-1‟ is displayed, it indicates over-range situation
and the higher range has to be selected.
2. For measuring resistance above 1MΩ, the mete may take a few seconds to
get stable reading.
3. When the input is not connected, i.e. at open circuit, the figure „1‟ will be
displayed for the over-range condition.
4. When checking in-circuit resistance, be sure the circuit under test has all
power removed and that all capacitors have been discharged fully.
5. the value scale to be measured is unknown beforehand, set the range
selector at the highest position.
7-6 Transistor Testing
7-6-1 Set the rotary switch at ‟hFE‟ position.
7-6-2 Determine whether the transistor under testing is NPN or PNP and locate
the emitter, base and collector leads. Insert the leads into proper holes of hFE
socket on the front panel.
7-6-3 Read the approximate hFE value at the testing condition of base current
Ib10uA and Vce 3V.
7-7 Diode Testing
7-7-1 Connect the black test lead to COM jack and the red to VΩmA jack. (the
polarity of red lead is „+‟.
7-7-2 Set the rotary switch at the F range position.
7-7-3 Connect the red lead to the anode and the black lead to
the cathode of the diode under testing.
7-7-4 You can get a reading from LCD.
NOTE:
1. The meter will show approximate forward voltage drop of the diode.
2. If the lead connections is reversed, only „1‟ will be displayed.
7-8 Continuity Testing
7-8-1 Connect the black test lead to COM jack and the red to VΩmA jack.
7-8-2 Set the rotary switch at the range position.
7-8-3 Connect test leads across two points of the circuit under testing.
7-8-4 If continuity exists (i.e. resistance less than about 50Ω), built-in buzzer
will sound.
NOTE:
If the input open circuit, the figure „1‟ will be displayed.
7-9 Measuring Capacitor
7-9-1 Connect the black test lead to Cx- jack and the red to Cx+ jack.
7-9-2 Set the rotary switch at the desired 20uF/200nF range position.
7-9-3 Before inserting capacitor under measurement into capacitance testing
socket, be sure that the capacitor has been discharged fully.
7-9-4 You can get reading from LCD.
7-10 Measuring Battery
Load resistance 1.5V range: 36Ω 9V range: 360Ω 12V range: 450Ω
7-10-1 The 1.5V battery by test is good when the display is more than 33mA.
7-10-2 The 9V battery by test is good when the display is more than 18mA.
7-10-3 The 12V battery by test is good when the display is more than 14mA.
8. Maintenance
8-1 Before attempting to remove the battery door or open the case, be sure
that test leads have been disconnected from measurement circuit top avoid
electric shock hazard.
8-2 To avoid electrical shock, remove test leads from measurement circuits
before replacing the fuse. For protection against fire, replace fuses only with
specified ratings: F-200mA/250V fuse.
8-3 Your must replace the test leads if the lead is exposed, and should adopt
the leads with the same specifications as origin.
8-4 Use only moist fabric or small amount of detergent but not chemical
solution for cleaning.
8-5 do not use the meter before the back cover is properly closed and screw
secured. Upon any abnormality, stop operation immediately and send the
meter for maintenance.
8-6 Please take out the battery when not using for a long time.
9. Accessories
[1] Test Leads: electric rating 600V 10A
[2] Fuse: F-200mA/250V
[3] Operator‟s Manual
Above picture and content just for your reference. Please be subject to
the actual products if anything different or updated. Please pardon for
not informing in advance.
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