ASTROAI USER MANUAL
TRUE RMS DIGITAL MULTIMETER
Thank you for purchasing the True RMS 6000 Count Digital Multimeter from AstroAI. The
AstroAI True RMS Digital Multimeter is designed to be safely and accurately used by
professionals in a commercial setting or weekend DYer’s that need a little more utility from their
standard digital multimeter. This manual provides all safety information, operation instruction,
specifications, and maintenance for the meter. The instrument performs AC/DC Voltage, AC/DC
Current, Resistance, Audible Continuity, Diode, hFE, Frequency, Capacitance, and
Temperature Testing. Thank you again for choosing AstroAI, if you have any questions or
concerns regarding your product, please contact us at support@astroai.com.
NOTE: Fully read and understand this manual before using this Digital Multimeter.
WARNING: To avoid possible electric shock or personal injury, and to avoid possible damage to
the Meter or to the equipment being tested, adhere to the following rules:
● Before using the Meter, inspect the exterior casing. Do not use the Meter if it is damaged
or if all or part of the exterior casing is removed. Look for cracks or missing plastic. Pay
special attention to the insulation around the connectors.
● Inspect the test leads for damaged insulation or exposed metal. Check the test leads for
continuity.
● Do not apply more than the rated voltage, as marked on the Meter, between the
terminals or between any terminal and grounding.
● The manual rotary switch should be placed in the correct position before measurement
and should NOT be moved during measurement to prevent damage to the Meter.
● When the Meter is working at an effective voltage over 60V in DC or 30V rms in AC,
special care should be taken because there is a danger of electric shock.
● Use the proper terminals, function, and range for your measurements.
● Do not use or store the Meter in a high-temperature environment, do not expose to high
levels of humidity, or near strong magnetic fields. The performance of the Meter may
deteriorate after dampening.
● When using the test leads, keep your fingers behind the finger guards.
● Disconnect circuit power and discharge all high-voltage capacitors before testing
resistance, continuity, diodes or hFE.
● Replace the battery as soon as the battery indicator appears. With a low battery, the
Meter might produce false readings that can lead to electric shock and personal injury.
● Remove the connection between the testing leads and the circuit being tested, and turn
the Meter power off before opening the Meter case.
● When servicing the Meter, use only the same model number or identical electrical
specifications replacement parts.
● The internal circuit of the Meter shall not be altered at will to avoid damage of the Meter
and any accident.
● Clean using a soft cloth and mild detergent for the surface of the Meter. Do not use
∽
AC (Alternating Current)
Low Battery
⎓
DC (Direct Current)
Diode
≂
AC and DC
Fuse
Earth Ground
Continuity Test
Double Insulated
⚠
Warning
AUTO
Auto Range
Dangerous Voltage may be present
Complies with EU directives
Digital Display
5 ¾ , 5999
Sampling Speed
2 times per second
LCD Size
64 x 42mm
Range Selection
Auto or Manual
Polarity Indication
Yes
Overload Indication
Yes
Low Battery Indication
Yes
abrasive materials or solvents to prevent the surface of the Meter from corrosion and
damage.
● Turn the Meter off when not in use and take out the battery when it is not going to be
used for an extended period of time. Regularly check the battery as it may leak when it
has not been used for some time. Replace the battery as soon as leaking appears. A
leaking battery will damage the Meter.
ELECTRICAL SYMBOLS
SPECIFICATIONS
Operating Environment
32°F~104°F (0°C~40°C); <80% RH
Storage Temperature
14°F~122°F (-10°C~50°C); <85% RH
Power
1 x 9V 6F22 Battery Included
Dimensions
190x90x35mm
Weight
Approx 357g
Temperature Test
Yes
Transistor Test
Yes
Diode Test
Yes
Continuity Test
Yes
External Current Test
Yes
Capacitance
Yes
Frequency
Yes
Safety/Compliances
EN 61010-1 CAT III 600V, CATII 1000V
DC Voltage
600mV6 ±(0.8%+5), V/60V/600V ±(0.8%+3), 1000V ±(1%+5)
AC Voltage
600mV ±(1.2%+8); 6V/60V/600V ±(1.2%+6); 750V ±(1.2%+8)
Temperature
-40°C~1370°C; -40°F~2000°F (1-5%+4 depending on temp)
DC Current
600μA/6000μA/60mA/600mA ±(0.8%+5); 6A/10A ±(1.5%+3)
Transistor hFE
PNP & NPN (lb≈2μA; Vce≈1V)
Resistance
600Ω/6KΩ/60KΩ/600KΩ/6MΩ ±(1.5%+3); 60MΩ ±(1.5%+5)
Capacitance
60nF/600nF/6μF/60μF/600μF/60mF
Frequency
0~60MHz ±(1%+5)
Accuracy is guaranteed for 1 year when stored at 73°F ±9°F
MULTIMETER DIAGRAM
1. Magnetic Hanger
2. LCD Screen
3. Function Buttons
4. Rotary Function Switch
5. 10A Terminal
6. μA/mA Terminal
7. COM Terminal
8. INPUT Terminal
9. Silicone Sleeve
10. Multi-Function Socket
LCD SCREEN DIAGRAM
%
Duty Cycle
℉
Fahrenheit Temperature
℃
Celsius Temperature
hFE
Transistor hFE
Continuity Test
Diode Test
External Current Test (Clamp)
AUTO
Autorange Mode
APO
Automatic Power-Off
Data Hold
MAX
Maximum Reading
MIN
Minimum Reading
DC
AC
Negative Reading
Low Battery, Replace Immediately
Relative Mode
GETTING TO KNOW YOUR DEVICE
Select Button
When using the rotary switch to select a multimeter function, use the Select Button to further
select the function. This applies only to multifunction settings like the temperature and test
functions.
Button
Hold and backlight function button. When taking a measurement, press this button to hold the
data for easier recording. Press the button again to remove the hold function.
Press and hold this button to turn on the backlight on the LCD screen.
Max/Min Button
When taking a measurement, press this button once to enter “Max Mode”. In this mode, the
multimeter will capture the highest reading it records. Press this button again to enter “Min Mode”
which will capture the lowest reading it records.
Press and hold this button to exit the Max/Min Modes.
Range Button
AC/DC Voltage, AC Current, and Resistance can all be measured in both Auto and Manual
ranging. The multimeter will come set to Auto, but if you desire to select the range manually,
press the Range Button repeatedly to find the desired range. Beware of selecting a range too
low, as it will Overload the device and the multimeter will not give a reading.
Press and hold the Range Button to return back to Auto Ranging.
Relative Button
When taking measurements, you can utilize the Relative Button to get more accurate readings
by removing the resistance of the test leads, for example. To activate this function, simply press
the Relative Button. A small triangle (delta symbol) will appear on the display and the reading
should change to zero.
Press the Relative Button again to exit relative mode.
Hz/Duty Button
When using the Hz/Duty Cycle function on the multimeter, quickly switch between functions by
pressing this button. You can also switch to measuring Hz while measuring other functions, like
Voltage, for example, by pressing this button during measurement.
Clamp Meter Attachment (Not Included)
Use a clamp meter attachment to measure currents, use the COM terminal for the black lead
from the clamp meter and the Input terminal for the red lead from the clamp meter.
Multi-Function Socket (Included)
Use the multi-function socket to measure both Capacitors and Transistors. Be sure to correctly
insert the multi-function socket into the COM and INPUT. the negative terminal on the multifunction socket on the left side and the positive on the right side.
DETAILED SPECIFICATIONS
Accuracy is guarantied for 1 year 23°C±5°C less than 80%RH
DC Voltage (Auto ranging)
Range
Resolution
Accuracy
600mV
0.1mV
±(0.8% of rdg + 5dgts)
6V
1mV
60V
10mV
600V
100mV
±(0.8% of rdg + 3dgts)
1000V
1V
±(1.0% of rdg + 5dgts)
Range
Resolution
Accuracy
600mV
0.1mV
±(1.2% of rdg + 8dgts)
6V
1mV
60V
10mV
±(1.2% of rdg + 6dgts)
600V
100mV
750V
1V
±(1.2% of rdg + 8dgts)
Input Impedance: 10MΩ
Overload Protection: 600V DC/AC RMS
Max. Input voltage: 600V DC
Measure DCV 1000V under CATII
AC Voltage (Auto ranging)
Input Impedance: 10MΩ
Frequency Range: 40Hz ~ 400Hz
Overload Protection: 600V DC/AC rms
Measure AC V 750V under CATII CAT III
Max. Input voltage: 600V AC RMS CATIII
Temperature
Range
Resolution
Accuracy
-40~1370°C
1°C
-40°C~150°C:±(1% + 4)
-40°F~302°F
±(5% + 4)
302°F~2000°F
1°F
±(2.5% + 3)
Range
Resolution
Accuracy
600µA
0.1µA
6000µA
1µA
60mA
10µA
600mA
100µA
±(0.8% of rdg + 5dgts)
6A
1mA
10A
10mA
±(1.5% of rdg + 3dgts)
Overload Protection: F0.4A/600V Fuse
DC Current
Overload Protection:
● “mA” Jack: F0.4A/600V fuse
● “10A” Jack: F10A/600V fuse
Max.Input Current:
● “mA” jack: 600mA
● “10A” jack: 10A
(For measurements >5A: Duration <10 seconds, interval >15 minutes)
Voltage Drop:
● 600µA, 60mA: 60mV，
● 6000µA, 600mA and 10A ranges: 600mV
Transistor hFE Test (Connect Adapter )
Range
hFE
Test Current
Test Voltage
PNP & NPN
0~1000
Ib≈2µA
Vce≈1V
AC Current
Range
Resolution
Accuracy
600µA
0.1µA
6000µA
1µA
60mA
10µA
600mA
100µA
±(1.5% of rdg +8dgts)
10A
100mA
±(2.0% of rdg +10dgts)
Overload Protection:
● “mA” jack: F0.4A/600V fuse
● “10A” jack: F10A/600V fuse Max.
Input Current:
● “mA” jack: 400mA
● “10A” jack: 10A
(For measurements>5A: duration<10 seconds, interval >15 minutes)
Voltage Drop:
● 600µA, 60mA ranges: 60mV
● 6000µA, 600mA and 10A ranges: 600mV
Frequency Range: 40Hz ~ 400Hz
Resistance (Auto Ranging)
Range
Resolution
Accuracy
600Ω
0.1Ω
6KΩ
1Ω
60KΩ
10Ω
600KΩ
100Ω
6MΩ
1KΩ
±(1.5% of rdg + 3dgts)
60MΩ
10KΩ
±(1.5% of rdg + 5dgts)
600A
1mV/10A
±(2.5%+10)
200A
1mV/1A
Range
Introduction
Remark
The approximate forward voltage
drop will be displayed
Open circuit voltage: about 1.5V
The built-in buzzer will sound if
the resistance is less than about
30Ω.
Open circuit voltage: about 0.5V
Open Circuit Voltage: about 0.25V
Overload Protection: 250V DC/AC RMS
600A AC current through a clamp (DT3303 optional)
Diode and Continuity
Overload Protection: 250V DC/AC rms
For continuity test: When the resistance is between 30Ω and 70Ω, the buzzer may sound or
may not sound. When the resistance is more than 70Ω, the buzzer will not sound
Capacitance
Range
Resolution
Accuracy
60nF
10pF
600nF
100pF
6uF
1nF
60uF
10nF
600uF
100nF
20uF
10uF
±(8% of rdg + 5dgts)
Range
Accuracy
0~60MHz
±(1.0% + 5)
Overload Protection: F0.4A/600V fuse
Open circuit voltage: about 0.5V
Frequency (Auto Ranging)
Overload Protection: 250V DC/AC RMS
OPERATING INSTRUCTIONS
Voltage Measurement
1. Connect the black test lead to the “COM” jack and the red test lead to the “INPUT ” jack.
2. Set the function switch to V or V range. Choose either Auto or Manual range using
the “Range” Button.
3. In manual range, if the voltage magnitude to be measured is unknown beforehand,
select the highest range.
4. Connect the test leads to the source or load to be measured.
5. Read LCD display. The polarity of the red lead connection will be indicated when making
a DC measurement.
Note:
a. When measuring small ranges, the multimeter’s display will sometimes show an
unstable result if the test leads are not connected to the load being measured. This is
normal and will not affect measurements.
b. In manual range, when the multimeter shows “OL” or Over Range, you must select a
higher range in order to get results.
c. To avoid damage to the meter, do not measure voltage exceeding 600V DC or 600V AC
CATIII.
Current Measurement
1. Connect the black test lead to the “COM” jack. If the current to be measured is less than
600mA, connect the red test lead to the “mA” jack. If the current is between 600mA and
10A, connect the red test lead to the “10A” jack instead.
2. Set the function switch to necessary range (µA, mA, or A). If the current magnitude to be
measured is not known beforehand, set the function switch to the highest range and
then reduce it range by range until a satisfactory resolution is obtained.
3. Select DC current measurement or AC current measurement with the “Select” Button.
a. There is no option to change between manual and automatic ranges for current
measurements.
4. Connect the test leads to the source or load to be measured.
5. Read LCD display. The polarity of the red test lead will be indicated.
Resistance Measurement
1. Connect the black test lead to the “COM” jack and the red test lead to the “INPUT ” jack.
2. Set the function switch to “ ” range.
3. Select either Auto or Manual range with the “Range” button. In manual range, if the
Resistance magnitude to be measured is not known beforehand, select the highest
range.
4. Connect the test leads to the source or load to be measured.
5. Read LCD display. The polarity of the red test lead will be indicated.
Note:
a. For resistance measurements >1MΩ, the meter may take a few seconds to stabilize
reading. This is normal for high-resistance measurement.
b. When the input is not connected, i.e. at open circuit, the symbol “OL” will be displayed as
an over range indicator.
c. Before measuring in-circuit resistance, be sure that the circuit under test has all power
removed and all capacitors are fully discharged.
Continuity Test
1. Connect the black test lead to the “COM” jack and the red test lead to the “INPUT ” jack.
2. Set the function switch to “ ” range.
3. Press the “Select” Button to select continuity measurement mode, and the symbol “ ”
will appear on the display.
4. Connect the test leads across the load to be measured.
5. If the circuit resistance is lower than about 30Ω, the built-in buzzer will sound.
Diode Test
1. Connect the black test lead to the “COM” jack and the red test lead to the “INPUT ” jack.
2. Set the function switch to “ ” range.
3. Press the “Select” Button to select continuity measurement mode, and the symbol “ ”
will appear on the display.
4. Connect the red test lead to the anode of the diode to be tested and the black test lead
to the cathode.
5. The meter will show the approximate forward voltage of the diode. If the connections are
reversed, “OL” will be shown on the display.
a. In this case, simply switch the test leads from the anode to the cathode and vice
versa.
Transistor Test
1. Set the function switch to“hFE ”range.
2. Connect the multi-function socket to the “COM” and “INPUT” Jacks. The negative side of
the socket must meet COM and the positive to INPUT. It is very important not to reverse
these by mistake.
3. Identify whether the transistor is NPN or PNP type and locate Emitter, Base and
Collector lead. Insert the leads of the transistor to be tested into the proper holes of the
transistor test socket of the adapter.
4. Read the LCD display for the approximate hFE value.
Temperature Measurement
1. Set the function switch to “ºC/ºF” range.
2. Use the Select Button to choose either Celsius or Fahrenheit.
3. Insert the negative (black) plug of the K-type thermocouple to the COM Jack and the
positive (red) plug to the INPUT Jack.
4. Carefully touch the end of the thermocouple to the object being measured.
5. Wait for the temperature reading to settle, then record the result from the LCD display.
Capacitance Measurement
1. Set the function switch to “ ” range.
2. Connect the multi-function socket to the “COM” and “INPUT” Jacks. The negative side of
the socket must meet COM and the positive to INPUT. It is very important not to reverse
these by mistake.
3. Place the capacitor into the multifunction-socket with the positive end in the positive
(INPUT) side of the multifunction-socket and the negative end of the capacitor in the
negative (COM) terminal of the multifunction-socket.
4. The results will be displayed on the LCD display.
5. If your Capacitor’s legs are too short to be used with the multifunction-socket, use the
test leads:
a. Connect the black test lead to the “COM” jack and the red test lead to the “INPUT”
jack.
b. Set the function switch to “ ” range.
c. Connect the test leads to the capacitor to be measured. Be sure to be aware of
the polarity of the connection.
Note:
a. When the capacitance under measure is more than 600uF, it needs at least 10 seconds
to make readings stable.
Frequency Measurement
1. Set the function switch to the “Hz Duty” position.
2. Connect the black test lead to the “COM” jack and the red test lead to the “INPUT ” jack.
3. Connect the leads to what is being measured, then get the results on the LCD screen.
Note:
a. Do not apply more than 250V RMS to the input.
Current Measurement (with Clamp attachment)
1. To measure current with a clamp, use either a clamp specifically made for DC current or
AC current.
2. Connect the negative output lead of the clamp to the COM Jack and the positive output
lead to the INPUT Jack.
3. Set the function switch to “ ” range.
4. Clamp the circuit to be measured with the clamp.
5. The results will be displayed on the LCD display.
Note:
a. Each time a measurement is taken, make sure that only one cable is clamped and is in
the center of the clamp jaws.
b. The clamp can only test for up to 600A, do not test circuits higher than 600A.
c. Do not touch the circuit with hand or skin.
d. The multimeter assumes a clamp has a sensitivity of 1A/1mV. The indicated value is the
same as the measured value for clamps with 1A/1mV.
i. If you use a clamp whose sensitivity does not equal 1mV/1A, multiply the present
reading by a factor which is determined by the used clamp, the result is the
measured value. To determine the factor, please refer to the instructions of the
clamp which you use.
Auto Power Off
The meter will power off after approximately 15 minutes of inactivity. To turn it on again, turn the
rotary function switch, or press the “Select” or “Range” button for more than 2 seconds.
Battery Replacement
If the “ ” symbol appears on the display, the battery should be replaced immediately. Remove
the rubber sleeve and the screws on the back of the multimeter to replace the battery.
Replace with NEDA 1604, 6F22, or equivalent 9V battery. Disconnect the test leads before
opening the back of the multimeter.
Fuse Replacement
Fuses will rarely need replacement and are normally only blown due to operator error. To
replace the fuses, open the battery cover by removing the rubber sleeve as well as the screws
on the back of the multimeter. Disconnect the test leads before opening the back of the
multimeter.
Replace the damaged fuse with a new one with the same ratings. This meter uses two fuses:
Fuse1: 400mA, 600V, FAST, Min. Interrupt Rating 20000A, Ø10X38mm
Fuse 2: 10A, 600V, FAST, Min. Interrupt Rating 20000A, Ø10X38mm
ACCESSORIES
1 x Owners Manual
1 x Pair of Test Leads
1 x K-Type Thermocouple
1 x Multi-Function Socket
DISPOSAL OF THIS ARTICLE
If you at some point intend to dispose of this article, please keep in mind that many of its
components consist of valuable materials, which can be recycled. Please do not discard it in the
garbage bin, but check with your local authorities for recycling facilities in your area.
1 Year Warranty Limited Warranty From AstroAI
Each AstroAI Digital Multimeter will be free from defects in material and workmanship. This
warranty does not cover fuses, disposable batteries and damage from neglect, misuse,
contamination, alteration, accident, or abnormal conditions of operation or handling, including
overvoltage failures caused by use outside the Multimeter’s specified rating, or normal wear and
tear of mechanical components. This warranty covers the original purchaser only and is not
transferable.
If this product is defective, please contact AstroAI Customer Support at support@astroai.com.
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