7. OPERATING INSTRUCTIONS
7-1 Attention before operation
7-1-1 Check battery. When the battery voltage drop below proper operation
range, the “ ” symbol will appear on the LCD display and the battery need to
changed.
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 DC 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. The polarity of the red lead connection
will be indicated along with the DC 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.
7-4 Measuring DC 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 , for a maximum 10A current, move the red lead
to the
10A
jack.
7-4-2 Set the rotary switch at the desired “
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 DC 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 200mA current can be protected by the PPTC
resettable fuse, but the 10A range is not fused.
4. On the 10A range, the measuring time should be less than 10 seconds to
prevent precision from affecting by circuit heating.
7-5 Measuring AC Current
7-5-1 Connect the black test lead to
COM
jack and the red to the
V
Ω
mA
jack
for a maximum 200mA current , for a maximum 10A current, move the red lead
to the
10A
jack.
7-5-2 Set the rotary switch at the desired “
A
”
range position.
7-5-3 Connect test leads in series with the load under measurement.
7-5-4 You can get reading from LCD. The polarity of the red lead connection
will be indicated along with the DC 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 200mA current can be protected by the PPTC
resettable fuse, but the 10A range is not fused.
4. On the 10A range, the measuring time should be less than 10 seconds to
prevent precision from affecting by circuit heating.
7-6 Measuring Resistance
7-6-1 Connect the black test lead to
COM
jack and the red to
V
Ω
mA
jack.
7-6-2 Set the rotary switch at the desired “
Ω
” range position.
7-6-3 Connect test leads across the resistance under measurement.
7-6-4 You can get reading from LCD.
NOTE:
Max. input overload: 250V rms
＜
10sec
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” or “-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.
7-7 Measuring Capacitance
7-7-1 Connect the black test lead to
COM
jack and the red to
V
Ω
mA
jack.
7-7-2 Set the rotary switch at the desired “
20
uF
”
range position.
7-7-3 Connect test leads across the capacitance under measurement.
7-7-4 You can get reading from LCD.
NOTE:
Capacitors should be discharged before being tested.
7-8 Measuring Temperature
7-8-1 Connect the black banana plug of the sensor to
COM
jack and the
red banana plug to the
V
Ω
mA
jack.
7-8-2 Set the rotary switch at the desired “ ” range position.
7-8-3 Put the sensor probe into the temperature field under measurement.
7-8-4 You can get reading from LCD.
NOTE:
1. The accessory of the meter WRNM-010 type contact thermocouple limit
temperature is 250
(300
shortly), please use special probe for test
higher temperature.
2. Please don't change the thermocouple at will, otherwise we can't guarantee
to measure accuracy.
3. Please don’t importing the voltage in the temperature function.
7-9 Battery Testing
7-9-1 Connect the black test lead to
COM
jack and the red to
V
Ω
mA
jack.
7-9-2 Set the rotary switch at the desired “
” or “ ” range position to
test 1.5V or 9V battery.
7-9-3 Connect test leads across the source or load under measurement.
7-9-4 You can get reading from LCD.
7-10 Diode & Audible continuity Testing
7-10-1 Connect the black test lead to
COM
jack and the red to
V
Ω
mA
jack.
7-10-2 Set the rotary switch at the “
” range position.
7-10-3 On
diode
range, connect the test leads across the diode under
measurement, display shows the approx. forward voltage of this diode.
7-10-4 On
Audible continuity
range, connect the test leads to two point
of circuit, if the resistance is lower than approx. 50
Ω
, the buzzer sounds.
NOTE:
Make sure the power is cut off and all capacitors need to be discharged
under this measurement.
7-11 Non Contact AC Voltage detection
7-11-1 Power on the meter, on any range, press the “
NCV
” key, the meter
enters Non Contact AC Voltage (NCV) detection, the NCV green LED light will
light up, and the “
NCV
” sign will appear on the display.
7-11-2 Hold the Meter so that the mater’s top is vertically and horizontally
centered and contacting the conductor, when the live voltage
≥
90V AC
rms, the NCV red LED light and green LED light will light up alternately
together with sound.
NOTE:
1. Even without LED indication, the voltage may still exist. Do not rely on
non-contact voltage detector to determine the presence of voltage wire.
Detection operation may be subject to socket design, insulation thickness and
different type and other factors.
2. When the meter input terminals presence voltage, due to the influence of
presence voltage, voltage sensing indicator may also be bright.
3. Keep the meter away from electrical noise sources during the tests, i.e.,
florescent lights, dimmable lights, motors, etc.. These sources can trigger
Non-Contact AC Voltage detection function and invalidate the test.
8. Battery replacement
1) When the battery voltage drop below proper operation range the " "
symbol will appear on the LCD display and the battery need to changed.
2) Before changing the battery, set the selector switch to “
OFF
” position.
Open the cover of the battery cabinet by a screwdriver.
3) Replace the old battery with the same type battery (9V 6F22 or NEDA
1604).
4) Close the cover of the battery cabinet and fasten the screw.
9. Maintenance
9-1 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.
9-2 You must replace the test leads if the lead is exposed, and should adopt
the leads with the same specifications as origin.
9-3 Use only moist fabric or small amount of detergent but not chemical
solution for cleaning.
9-4 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.
9-5 Please take out the battery when not using for a long time.
10. Accessories
[1] Test Leads: electric rating 1000V 10A
[2] “K” type thermocouple sensor probe
[3] Operator’s Manual
