6-8 Duty cycle
0.1%
～
99.9%: ± ( 2.0% of rdg + 2 digits ), Frequency lower than 10kHz
-- Sensitivity: sine wave 0.6V rms
-- Overload protection: 500V DC or AC rms
6-9 Temperature
Range
Accuracy
Resolution
℃
-20~150
℃
± ( 3
℃
+ 1digit )
1
℃
150~1000
℃
± ( 3% of rdg + 2digits )
℉
-4~302
℉
± ( 5
℉
+ 2digits )
1
℉
302~1832
℉
± ( 3% of rdg + 3digits )
-- NiCr-NiSi K-type sensor
-- Overload protection: 800mA/500V Fast Fuse
6-10 Diode and Audible continuity test
Range
Description
Test Condition
Display read approximately
forward voltage of diode
Forward DC current
approx. 1.5mA
Reversed DC voltage
approx. 3.2V
Built-in buzzer sounds if
resistance is less than 50Ω
Open circuit voltage
approx. 1V
Overload protection: 500V DC or AC rms
6-11 Transistor hFE test
Test range: 0-1000
Ib=10µA, Vce=1.8V Approx.
6-12 Non Contact AC Voltage (NCV) detection
Test voltage range: 90V
～
1000V AC rms
The NCV red light and green light will light up alternately together with sound.
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 & AC Voltage
7-2-1 Set the rotary switch at the desired “
mV
” or “
V
” range position, it shows symbol for
testing DC voltage, if you want to test AC voltage, push “SELECT” button switch.
7-2-2 Connect the black test lead to
COMT-
jack and the red to
VΩHz
jack.
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.“
” means you can’t input the voltage more than 1000V DC or 750V AC, it’s possible to show
higher voltage, but it may destroy the inner circuit or pose a shock.
2. Be cautious against shock when measuring high Voltage.
7-3 Measuring DC & AC Current
7-3-1 Set the rotary switch at the desired “
uA
” & “
mA
” & “
A
” range position, it shows
symbol for testing DC current, if you want to test AC current, push “SELECT” button switch.
7-3-2 Connect the black test lead to
COMT-
jack and the red to the
μAmAT+
jack for a maximum
600mA current , for a maximum 6A or 20A current, move the red lead to the
20A
jack.
7-3-3 Connect test leads in series with the 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 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 “OL” is displayed, it indicates over-range situation and the higher range has to be
selected.
3. “
” means the socket mA’s maximum current is 800mA and 20A’s maximum current is 20A, over
800mA or 20A current can be protected by the fast fuse.
4. On the 20A range, the measuring time should be less than 10 seconds to prevent precision from
affecting by circuit heating.
7-4 Measuring DC & AC 600A Current
7-4-1 Set the rotary switch at the desired “
600A
” range position, it shows symbol for testing DC
current, if you want to test AC current, push “SELECT” button switch.
7-4-2 Connect the black banana plug of the AC/DC Current Clamp Adapter to
COMT-
jack and the
red banana plug to the
μAmAT+
jack.
7-4-3 Set the AC/DC Current Clamp Adapter to “
1mV/A
” range.
7-4-4 When perform DC current measurement, always rotate or push the DCA zero adjuster on the
Clamp Adapter until the multimeter reads zero.
7-4-5 Clamp the Jaws around the
one
conductor to be measured. Center the conductor within the
Jaw using the Centering Marks as guides.
7-4-6 Read the result from the LCD panel. The arrow in the Jaw indicates the DC current direction of
positive current flow (positive to negative).
7-5 Measuring Resistance
7-5-1 Set the rotary switch at the desired “
” range position.
7-5-2 Connect the black test lead to
COMT-
jack and the red to
VΩHz
jack.
7-5-3 Connect test leads across the resistance under measurement.
7-5-4 You can get reading from LCD.
NOTE:
Max. input overload: 500V rms
＜
10sec
1. For measuring resistance above 1MΩ, the mete may take a few seconds to get stable reading.
2. When the input is not connected, i.e. at open circuit, the figure ‘OL’ will be displayed for the
over-range condition.
3. When checking in-circuit resistance, be sure the circuit under test has all power removed and that
all capacitors have been discharged fully.
7-6 Measuring Capacitance
7-6-1 Set the rotary switch at the desired “
” range position, push “SELECT” to choose
capacitance
measurement.
7-6-2 Connect the black test lead to
COMT-
jack and the red to
VΩHz
jack.
7-6-3 Connect test leads across the capacitance under measurement.
7-6-4 You can get reading from LCD.
NOTE:
Max. input overload: 500V rms
＜
10sec
1.
Capacitors should be discharged before being tested.
2.
When testing large capacitance, it will take longer time before the final indication ( For
100uF~99.99mF range, it will take about 10 seconds ).
3.
When testing small capacitance (≤1uF), to assure the measurement accuracy, first press
"REL
▲
", then go on measuring.
7-7 Measuring Frequency & Duty cycle
7-7-1 Set the rotary switch at the desired “
Hz
” range position.
7-7-2 Connect the black test lead to
COMT-
jack and the red to
VΩHz
jack.
7-7-3 Push “
Hz/Duty
” key to choose
Frequency
or
Duty cycle
test.
7-7-4 Connect the probe across the source or load under measurement.
7-7-5 You can get reading from LCD.
7-8 Measuring Temperature
7-8-1 Set the rotary switch at the desired “
” range position, push “SELECT” to choose
℃
or
℉
measurement.
7-8-2 Connect the black banana plug of the sensor to
COMT-
jack and the red banana plug to the
μAmAT+
jack.
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 Diode & Audible continuity Testing
7-9-1 Set the rotary switch at the “
” range position, push “SELECT” to choose
Diode
or
Audible continuity
measurement.
7-9-2 Connect the black test lead to
COMT-
jack and the red to
VΩHz
jack.
7-9-3 On
diode
range, connect the test leads across the diode under measurement, display
shows the approx. forward voltage of this diode.
7-9-4 On
Audible continuity
range, connect the test leads to two point of circuit, if the resistance is
lower than approx. 50Ω, the buzzer sounds.
NOTE:
Make sure the power is cut off and all capacitors need to be discharged under
this measurement.
7-10 Transistor hFE Test
7-10-1 Set the rotary switch at the desired “
hFE
” range position.
7-10-2 Determine whether the transistor is NPN or PNP and locate the Emitter, Base and
Collector leads. Insert the leads into the proper holes in the socket on the front panel.
7-10-3 You can get reading of the approximate hFE value from LCD.
NOTE:
Don’t connect an external voltage to measuring terminals.
7-11 Non Contact AC Voltage detection
7-11-1 Set the rotary switch at the desired “
NCV
” range position, the NCV green LED light light
u
p.
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
8-1 When the battery voltage drop below proper operation range the "
" symbol will appear on the
LCD display and the battery need to changed.
8-2 Before changing the battery, set the selector switch to “
OFF
” position and remove the test leads
from the terminals. Open the cover of the battery cabinet by a screwdriver.
8-3 Replace the old battery with the same type battery (AA R6P 1.5V×2).
8-4 Close the cover of the battery cabinet and fasten the screw.
9. Fuse replacement
9-1 This meter is provided with a 800mA/500V fast fuse to protect the temperature test and the
current measuring circuits which measure up to 600mA, with a 20A/500V fuse to protect the 20A
range.
9-2 Ensure the meter is not connected to any external circuit, set the selector switch to “
OFF
”
position and remove the test leads from the terminals. Open the cover of the battery cabinet by a
screwdriver.
9-3 Replace the old fuse with the same type and rating: 6×30mm 800mA/500V fast fuse or 6×30mm
20A/500V fast fuse.
9-4 Close the cover of the battery cabinet and fasten the screw.
10. Maintenance
10-1 You must replace the test leads if the lead is exposed, and should adopt the leads with the
same specifications as origin.
10-2 Use only moist fabric or small amount of detergent but not chemical solution for cleaning.
10-3 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.
10-4 Please take out the battery when not using for a long time.
