6-7 Frequency
Range Accuracy Resolution
9.999Hz
± (0.1% of rdg + 5 digits)
0.001Hz
99.99Hz 0.01Hz
999.9Hz 0.1Hz
9.999kHz 1Hz
99.99kHz 10Hz
999.9kHz 100Hz
9.999MHz 1kHz
-- Sensitivity: sine wave 0.6V rms (9.999MHz: 1.5V rms)
-- Overload protection: 500V DC or AC rms
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℃ + 3digits ) 0.1℃
150~1000℃± ( 3% of rdg + 3digits )
℉-4~302℉± ( 5℉ + 5digits ) 0.1℉
302~1832℉± ( 3% of rdg + 5digits )
-- NiCr-NiSi K-type sensor
-- Overload protection: 500mA/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
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 COM 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 ”& “20A”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 COM jack and the red to the μAmA600A jack for a
maximum 400mA current , for a maximum 4A 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 500mA and 20A’s maximum current is 20A,
over 500mA 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 COM jack and the
red banana plug to the μAmA600A 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 COM 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.
7-6-2 Connect the black test lead to COM 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 COM jack and the red to VΩHz jack.
7-7-3 Push “Hz%” 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 ℉ m easurement.
7-8-2 Connect the black banana plug of the sensor to COM jack and the red banana plug to the
μAmA600A 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 COM 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.
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 (9V 6F22).
8-4 Close the cover of the battery cabinet and fasten the screw.
9.Fuse replacement
9-1 This meter is provided with a 500mA/500V fast fuse to protect the temperature test and the
current measuring circuits which measure up to 400mA, 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 500mA/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.
11. Accessories
[1] Test Leads: electric rating 1000V 20A
[2] “K” type thermocouple sensor probe
[3] Operator’s Manual
