AstroAI DT201D Assembly instructions
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1. INTRODUCTION
This manual provides all safety information, operation
instruction, specifications and maintenance for the meter,
which is compact, handheld, and battery operated.
This instrument performs AC/DC voltage, AC Current,
Resistance, Audible Continuity, Diode and Temperature
measurements. It is a 3 5/6 digits, 6000 counts auto ranging
digital clamp multimeter.
DT201D digital clamp multimeter has been designed
according to EN61010-1 oncoming electronic measuring
instruments with an over voltage category (CAT III 600V
CAT II 1000V) and Pollution degree 2.
Warning
To avoid possible electric shock or personal injury, and
to avoid possible damage to the Meter or to the equipment
under test, adhere to the following rules:
Before using the Meter inspect the case. Do not use
the Meter if it is damaged or the case (or part of the
case) is removed. Look for cracks or missing plastic.
Pay 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 rotary switch should be placed in the right
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position and no any changeover of range shall be
made during measurement is conducted to prevent
damage of the Meter.
When the Meter working at an effective voltage over
60V in DC or 30V rms in AC, special care should be
taken for there is danger of electric shock.
Use the proper terminals, function, and range for your
measurements.
Do not use or store the Meter in an environment of
high temperature, humidity, explosive, inflammable
and strong magnetic field. The performance of the
Meter may deteriorate after dampened.
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 or diodes.
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.
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Soft cloth and mild detergent should be used to clean
the surface of the Meter when servicing. No abrasive
and solvent should be used to prevent the surface of
the Meter from corrosion, damage and accident.
The Meter is suitable for indoor use.
Turn the Meter power off when it is not in use and
take out the battery when not using for a long time.
Constantly check the battery as it may leak when it
has been using for some time, replace the battery as
soon as leaking appears. A leaking battery will
damage the Meter.
2. GENERAL CHARACTERISTICS
Display : LCD, 6000 counts updates 2/sec
LCD size : 30*49 mm
Polarity Indication : “-” displayed automatically
Over-range Indication : “OL” displayed
Low Battery Indication : “ ” displayed
Range select : auto range or manual
True-RMS : ACV ACAmeasure
Operation Temperature : 0°C to 40°C, less than 80%RH
Storage Temperature : -10°C to 50°C, less than 85%RH
Battery Type : 9V NEOA 1604，6F22equivalent
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Dimension(H×W×D) : 245×66×45mm
Clamp open jaw : Max. 42mm
Weight : Approx 334g
3. ELECTRICAL SYMBOLS
DC (Direct Current).
AC (Alternating Current).
DC or AC
Important safety information.
Refer to the manual
Dangerous voltage maybe present.
Earth ground
Low battery
Diode
Continuity test
°C Centigrade
AUTO Auto range
Conforms to European Union directive
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Double insulated
4. PANEL DESCRIPTION
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1、Transformer Jaws
Pick up the AC Current flowing through the conductor.
2、Trigger
Press the level to open the transformer jaws when the finger
press on the level is released the jaws will close again.
3、Hz/DUTY BUTTON
Push this button to select Hz or DUTY CYCLE
measurement, at Hz positing. at AC curent position,can
Measure frequency .
4、RANGE BUTTON
AC/DC voltage, AC current and Resistance measuring
ranges can be selected manually or automatically by
pushing the range control button. Push this button as
follows to choose range control mode and needed ranges.
5、Display
3 5/6 digit LCD, with a max. reading of 5999
6、“ ” Input Connect
High input for all except voltage , measurement will accept
banana plugs.
7、COM Input Jack
Low input for all voltage, resistance, and continuity etc
measurement will accept banana plugs.
8、“ ”RANGE
resistance,continuty,capacitance,diode , Push selcet button
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to choose needed ranges.
9、SELECTING BUTTON
Push this button to select Ω， ， or measuring
function when the function switch is set at Ω range.
10、Function Switch / Range Switch
This switch can be used to select desired function and
range.
11、D.HOLD BUTTON
When this button is pushed, LCD will show the last reading,
and “H” symbol will appear till pushed again. Back light
function, push this button for more than 3 seconds, back
light will light ，after 15 seconds ，back light will turn off
automatically。
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1、Duty Cycle is selected
2、Fahrenheit temperature test is selected
3、Celsius degree test is selected
4、Continuity test is selected
5、Diode test is selected
6、Autorange mode is selected
7、Automatic power-off mode is selected
8、high voltage wanning symbol
9、Data Hold is enabled
10、MAX - Maximum reading is being displayed
11 、MIN - Minimum reading is being displayed
12、DC
13、Negative sign
14、AC
15、Low Battery and replaced immediately
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5. SPECIFICATIONS
Accuracy is guarantied for 1 year 23°C±5°C less than
80%RH
5-1. DC VOLTAGE (Auto ranging)
Input Impedance: 10MΩ
Range
Resolution
Accuracy
600mV
0.1mV
±(0.8% of rdg + 5dgts)
6V
1mV
±(0.8% of rdg + 3dgts)
60V
10mV
600V
100mV
1000V
1V
±(1.0% of rdg + 5dgts)
Overload Protection:
600V AC RMS CAT III, 1000V AC RMS CAT II
Max. Input voltage:
600V AC RMS CAT III, 1000V AC RMS CAT II
5-2. AC CURRENT (Auto ranging)
Measuring voltage drop: 200mV
Range
Resolution
Accuracy
60A
10mA
±(2.5% of rdg + 10dgts)
600A
100mA
1000A
1A
show True-RMS value
5-3. AC VOLTAGE (Auto ranging)
Range
Resolution
Accuracy
600mV
0.1mV
±(1.2% of rdg + 8dgts)
6V
1mV
±(1.2% of rdg + 6dgts)
60V
10mV
600V
100mV
750V
1V
±(1.2% of rdg + 8dgts)
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Input Impedance: 10MΩ
Input Impedance: 10MΩ
Overload Protection: 600V AC RMS CAT III, 1000V AC
RMS CAT II
Max. Input voltage: 600V AC RMS CAT III, 1000V AC RMS
CAT II
show True-RMS value
5-4. TEMPERATURE
Range
Resolution
Accuracy
-40 ~
1370°C
1°C
-40°C~150°C:±(1% + 4)
150°C~1370°C:±(2% + 3)
-40 ~
2000°F
1°F
-40°F~302°F:±(5% + 4)
302°F~2000°F:±(2.5% + 4)
Overload Protection: 250V DC/AC rms
5-5. RESISTANCE (Auto Ranging)
Range
Resolution
Accuracy
600Ω
0.1Ω
±(1.5% of rdg + 5dgts)
6KΩ
1Ω
60KΩ
10Ω
600KΩ
100Ω
6MΩ
1KΩ
60MΩ
10KΩ
Open Voltage: about 0.25V
Overload Protection: 250V DC/AC RMS
5-6. Diode and Continuity
Range
Introduction
Remark
The approximate forward
voltage drop will be
displayed
Open circuit
voltage: about
1.5V
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The built-in buzzer will
sound if the resistance is
less than about 30Ω.
Open circuit
voltage: about
0.5V
Overload Protection: 250V DC/AC RMS
For continuity test: When the resistance is between 30Ω and
100Ω, the buzzer may sound or may not sound. When the
resistance is more than 100Ω, the buzzer won’t sound.
5-7.1 FREQUENCY (Auto Ranging)
Range
Accuracy
0 ~ 60MHz
±(1.0% of rdg + 5dgts)
5-7. 2 FREQUENCY ( through clamp )
Range
Accuracy
50 ~ 1KHz
±(1.5% of rdg + 5dgts)
5-8. CAPACITANCE (Auto Ranging)
Range
Accuracy
60nF/600nF/6uF
60uF/400uF/20mF（10sec）
±(8.0% of rdg + 5dgts)
5-9. DUTY CYCLE
Range
Resolution
Accuracy
0.01%~99.9%
0.01%
±1%
For value between 10% and 90% duty cycle at 50Hz.
6. OPERATION INSTRUCTION
6-1. Measuring Voltage
1) Connect the BLACK test lead to the “COM” jack and
the RED to the “v” jack.
2) Set the function switch to V or V range.
3) Connect the test leads across the source or load to be
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measured.
4) Read LCD display. The polarity of the RED lead
connection will be indicated when making a DC
measurement.
Note:
a. In small range example mV range , the meter
may display an unstable reading when the test
leads have not been connected to the load to be
measured. It is normal and will not affect the
measurements.
b. To avoid damage to the meter, don’t measure a
voltage which exceeds 600V (for DC voltage
measurement) or 600V(for AC voltage
measurement) ，under CAT III conditions.and
1000V(for DC voltage) 750V(for AC voltage)
under CAT II conditions.
6-2. Measuring Current
1) Set Function/Range Switch to the 60A 600A 1000A
range.
2) Press the trigger to open the transformer jaws and
clamp one conductor only it is impossible to make
measurements when two or three conductors are
clamped at the same time.
3) Display reading is flowing the conductor AC current.
6-3. Measure Resistance
1) Connect the BLACK test lead to the “COM” jack and
the RED to the“ ”jack (Note: The polarity
of the red test lead is positive “+”).
2) Set the function switch to range.
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3) Press“RANGE” button can be select manually
measurement
4) Press “SELECT” button to select resistance
measurement mode,the symbol“MΩ”will appear as an
indicator.
5) Connect the test leads across the load to be
measured.
6) Read the reading on the display.
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.
6-4. Continuity Test
1) Connect the BLACK test lead to the “COM” jack and
the RED to the“ ” jack (Note: The polarity
of the red test lead is positive “+”).
2) Set the function switch to “ ” range
3) Press the “SELECT” Button to select continuity
measurement mode, and the symbol “ ” will appear
as an indicator.
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.
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”
6-5. Diode Test
1) Connect the BLACK test lead to the “COM” jack and
the RED to the“ ” jack (Note: The polarity
of the red test lead is positive “+”).
2) Set the function switch to“range
3) Press the “SELECT” Button to select continuity
measurement mode, and the symbol “ ” will appear
as an indicator.
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.
6-6. Measuring Temperature
1) Set the function range switch at the TEMP position.
2) Make sure the polarity of the thermocouple is correct;
put the cold end (free end) of the thermocouple sensor
into the terminal (black to COM jack and red to
“ ” jack).
3) Set the working end (testing end) on or inside the
object under test.
4) The value of the temperature is shown on the display
in degree centigrade (°C).
5) Press the “SELECT” Button,fahrenheit and celsiuscan
be converted to each other.
6-7. Capacitance Measuring
1) Connect the BLACK test lead to the “COM” jack and the
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RED to the “ ” jack.
2) Set the function switch at “ ” position. (NOTE:
The polarity of the RED lead is positive “+”)
3) Connect test leads across the capacitor under measure
and be sure the polarity of connection is observed.
Note: When the capacitance under measure is above
100uF, it needs at least 5 second to make readings stable.
6-8. Frequency Measuring(auto range)
1) Set the function range switch to the required
“Hz/DUTY” position.
2) Connect the BLACK test lead to the “COM” jack and
the RED to the “ ” jack (Note: The polarity
of the red test lead is positive “+”).
3) Connect the test leads across the load to be
measured.
Note: Do not apply more than 250V rms to the input.
Indication is possible a voltage higher than 100V rms, but
reading maybe out of specification.
At the same time using the clamp hand to test AC current,
press key, the meter shows the frequency of the
measured current.
NOTE:
a) The testing temperature is displayed automatically when
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the thermocouple is put into the testing holes.
b) The surrounding temperature is shown when the circuit of
the sensor is cut off.
c) The limit temperature measured by the thermocouple
given together with the instrument is 250°C; 300°C is
acceptable within short period,if need to measure higher
temperature,you must to buy the higher thermocouple.
7. Auto Power Off
If you don’t operate the meter for about 15 minutes, it will
turn off automatically. To turn on it again, just rotate the
range switch or press a button.
8. BATTERY REPLACEMENT
If the sign “ ” appear on the display, it indicates battery
should be replaced. Remove screws and open the back
case, replace the exhausted battery with new batteries (9V
NEDA 1604,6F22 equivalent).
9. ACCESSORIES
Owners manual: 1 piece
Test leads: 1 pair
K type thermocouple: 1 piece
Battery(9V 6F22): 1 piece
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WARRANTY
AstroAI always wants to provide our customers with excelle
nt products as well as customer service. To know more abo
ut us, please visit astroai.com.
This Instrument is warranted to be free from defects in
material and workmanship for a period of one year.
Any instrument found defective within one year from
the delivery date and returned to the factory with
transportation charges prepaid, will be repaired,
adjusted, or replaced at no charge to the original
purchaser. This warranty does not cover expandable
items such as batteries & fuses. If the defect has been
caused by a misuse or abnormal operating conditions,
the repair will be billed at a nominal cost.
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