2
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 V
Ω
mA 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 V
Ω
mA 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 V
Ω
mA 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 V
Ω
mA jack.
7-5-2 Set the rotary switch at the desired
Ω
range 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 1M
Ω
, 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 V
Ω
mA 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 V
Ω
mA 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 50
Ω
), 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.
