ProsKit MT-1710 User manual

MT-1710
3-3/4 True-RMS Auto Range Multimeter
User’s Manual
1st Edition, 2013/11/21
©2013 Copyright by Prokit’s Industries Co., Ltd.

1. INTRODUCTION
The instrument is a stable and high performance True-RMS digital multimeter
driven by battery. With 25mm high LCD display, the digital multimeter is easier
for users to read the digits. In addition, the design of backlight and overload
protection is convenient for operation.
The function of MT-1710 is to measure DCV, ACV, DCA, ACA, Resistance,
Capacitance, Frequency, Temperature, Transistor, Diode and Continuity test.
The instrument which adopts dual-integral A/D converter is an excellent meter.
It’s an ideal tool for lab, factory and field use.
2. SAFETY NOTES
The meter meets the standard of IEC1010. Please read safety notes before
operation.
1．Do not input more than the limited voltage of 1000V DC or 750V AC RMS
when measuring voltage.
2．Safety voltage is less than 36V. When the voltage is higher than 36V DC,
25V AC, please check the connection, insulation of test leads to avoid
electric shock.
3．When switching function and range, test probes should be removed from
testing point.
4．Select correct function and range.
5．To measure current, do not input over 10A current.
6．Safety symbols:
“” High Voltage “” GND “” Dual Insulation
“” Refer to Manual “” Low Battery
3. SPECIFICATIONS
3.1 General Specifications
Display Mode: LCD display
Max. Indication: 3999 (3 3/4), auto polarity indication
Measuring Method: Dual-slope integrating A/D converter system
Sampling Rate: Approx. 3 times/second
Over Range Indication: “OL”
Low Battery: “ ”
Operating Environment: Temperature (0 ~ 40)℃, Humidity<80%RH
Power: 9V battery.
Dimension: 190mm×95mm×45mm.
Weight: Approx 370g. (Not included battery)
Accessories: Operation manual, holster, gift box, thermocouple, test
leads
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3.2 ELECTRICAL SPECIFICATIONS
Accuracy is ± (RDG × a% + the lowest digit) at (23±5)℃,<75%RH.
DC Voltage mV:
Range Accuracy Resolution
400mV ±(0.5%+4) 0.1mV
Input Impedance: ＞40MΩ
Overload Protection: 1000V DC or 750V AC peak value
DC Voltage：
Range Accuracy Resolution
4V 1mV
40V 10mV
400V
±(0.5%+4)
100mV
1000V ±(1.0%+6) 1V
Input Impedance: 10MΩ
Overload Protection: 1000V DC or 750V AC peak value
AC Voltage mV (True RMS)：
Accuracy
Range 40Hz-200Hz 200Hz-1kHz Resolution
400mV ±(1.6%+8)
±(1.6%+8)
sine and
triangular wave
±(8.0%+15)
other wave 0.1mV
Input Impedance: ＞40MΩ
Overload Protection: 1000V DC or 750V AC peak value
Frequency Response: 40Hz-1 kHz
Display: True RMS
AC Voltage ( True RMS)：
Accuracy
Range 40Hz-200Hz 200Hz-1kHz Resolution
4v 1mV
40v 10mV
400V 100mV
750V
±(1.0%+10)
±(0.8%+10)
sine and
triangular
wave
±(8.0%+15)
other wave
1V
Input Impedance：10MΩ
Overload Protection：1000V DC or 750V AC peak value.
Frequency Response：40Hz-1 kHz
Display: True RMS

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DC Current：
Range Accuracy Resolution
400uA 0.1uA
4000uA ±(1.0%+10) 1uA
40mA 10uA
400mA ±(1.2%+8) 100uA
10A ±(1.2%+10) 10mA
Max. Measuring Voltage Drop: Full scale mA range: 400mV
A range: 100mV
Max. Input current: 10A (less than 10 seconds).
Overload protection: 400mA/250V fuse, 10A/250V fuse.
AC Current (True RMS)：
Accuracy
Range 40Hz-200Hz 200Hz-1kHz Resolution
4
00u
A
0.1uA
4
000u
A
1uA
4
0m
A
10uA
4
00m
A
±(1.5%+10)
±(1.5%+10)
sine and
triangular wave 100uA
10
A
±(2.0%+15)
±(2.0%+15)
sine and
triangular wave
±(8.0%+15)
other wave
10mA
Max. Measuring Voltage Drop: Full scale mA range: 400mV
A range: 100mV
Max. Input Current: 10A (less than 15 seconds).
Overload Protection: 400mA /250V fuse, 10A/250V fuse
Frequency Response: 40Hz-1kHz.
Resistance：
Range Accuracy Resolution
400Ω±(0.8%+5) 0.1Ω
4kΩ1Ω
40kΩ10Ω
400kΩ100Ω
4MΩ
±(0.8%+4)
1kΩ
40MΩ±(1.2%+10) 10kΩ
Overload Protection: 250V DC/AC peak value
Open circuit voltage: 400mV
Note: When measuring 400Ωrange, the test leads should be short-circuited
to observe short-circuit impedance.

Capacitance：
Range Accuracy Resolution
10nF ±(5.0%+20) 10pF
100nF 100pF
1u F 1nF
10uF 10nF
100uF
±(3.5%+8)
100nF
1mF/10mF/100 mF ±(5.0%+10) 1 uF/10 uF/100 uF
Overload Protection: 250V DC/AC peak value
Frequency：
Range Accuracy Resolution
100Hz 0.01Hz
1000Hz 0.1Hz
10kHz 1Hz
100kHz 10Hz
1MHz 100Hz
30MHz
±(0.5%+10)
1kHz
Input Sensitivity: 1.5V
Overload Protection: 250V DC/AC peak value
hFE test：
Range Value Test condition
NPN or PNP 0~1000 Basic current is approx.
10uA,Vce is approx.3V
Warning: do not input voltage at the range for safety
Diode and continuity Test：
Range Value Test Condition
Positive voltage drop
of diode
The positive DC Current is
approx.0.5mA; negative
voltage is approx. 1.5V.
Buzzer sounds, the
resistance is less
than 40±30Ω.
Open circuit voltage:
0.5V
Overload Protection: 250V DC/AC peak value
Warning: do not input voltage at the range for safety.
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Temperature：
Range Value Test condition
(-20-1000)℃<400℃±(1.0%+5)
≥400℃±(1.5%+15) 1℃
(-4-1832)℉<752℉±(1.0%+5)
≥752℉±(1.5%+15) 1℉
Sensor: K type
Warning: Do not input voltage at the range for safety.
4. OPERATION
4.1 Front Panel and Description：
1. LCD: display the measuring value and unit.
2. Function key
2-1. “select” key: Select DC/AC, frequency
and duty cycle. Hz/DUTY Key: when
measuring DCA, press the key to
switch ACA. When measuring
frequency, press the key to switch
frequency/duty cycle (1~99%).
2-2. RANGE Key: Select the mode of
automatic measurement and manual
measurement. The default mode is
automatic measurement and “AUTO”
is displayed. Press the key to manual
mode, and if you press one time, it will
be turned to next level from low to high
in turn. Press the key for 2 sec. and it will return to automatic
measurement condition.
2-3. REL Key: Press the key at voltage, current and capacitance range,
and then digits are reset to show relative value measurement. LCD
displays “REL” symbol, and press it again to exit the function.
2-4. HOLD Key: Press the key, the present value is showed on LCD and
display “HOLD”. Press the button again to exit the function. Press the
key for 2 sec. will turn to the backlight.
3. Rotary Switch: Select measurement function and range.
4. Voltage, Resistance, Frequency, temperature, diode, continuity jack.
5. COM jack
6. For measuring current less than 400mA jack.
7. For measuring current 10A jack.
4.2 DC Voltage measurement：
1.Insert the BLACK test lead to “COM” jack and RED test lead to the “VΩHz”
jack.
2.Switch the FUNCTION to “ ” range.
3.The default range is Auto, and "AUTO" is displayed. To press RANGE key
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4.
Connect the test leads to the tested point, the voltage and polarity that are
connected with the red lead will appear on LCD.
Note:
1. Manual measurement if LCD displays "OL", it means over range. Please
set the range knob to a higher range.
2. Do not measure over 1000V DCV, or the meter will be damaged.
3. Be careful to avoid contact with high voltage circuits when measuring high
voltage.
4.3 DC Voltage mV Measurement：
1. Insert the BLACK test lead to “COM” jack and RED test lead to the
“VΩHz” jack.
2. Set the FUNCTION switch to “mV” range.
3. Measuring less than 400mv voltage has no automatic measurement
function at this range.
4. Connect the test leads to the tested point, the voltage and polarity that
are connected with the red lead will appear on LCD.
Note:
1. If LCD displays "OL", it means over range. Please set the range knob to
a higher range
2. Do not measure over 1000V DCV, or the meter will be damaged.
3. Be careful to avoid contact with high voltage circuits when measuring
high voltage.
4.4 AC Voltage mV True-RMS Measurement：
1. Insert the BLACK test lead to “COM” jack and RED test lead to the
“VΩHz” jack.
2. Switch the FUNCTION to “mV” range, and press the “select” key. LCD
displays ACmV with no automatic measurement function at this range.
Do not measure over 400mv voltage.
3. Connect the test leads to the tested point, the voltage of the two points
that are connected with the test leads will appear on LCD.
Note:
1. If LCD displays "OL", it means over range. Please set the range knob to
automatic AC voltage.
2. Do not measure over 400mV AC, or the meter will be damaged.
4.5 AC Voltage True-RMS Measurement：
1. Insert the black test lead to “COM” jack and the red one to “VΩHz” jack.
2. Switch the function to “ ” range.
3. The default range is Auto range, and "AUTO" is displayed. To press
RANGE key switch to manual range, and 400mV/4V/40V/400V/700V can
be selected.
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4. Connect the test leads to the test points, and the voltage of the two points
that are connected with the test leads will appear on LCD.

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Note:
1. Manual measurement, if LCD displays "OL", it means over range. Please
set the range knob to a higher range.
2. Do not measure over 750V ACV, or the meter will be damaged.
3. Caution to avoid contact with high voltage circuits when measuring high
voltage.
4.6 DC Current Measurement：
1. Insert the BLACK test lead to “COM” jack and RED test lead to the “mA”
(max. 400mA) or "10A" jack (max. 10A).
2. Switch the FUNCTION to current range. Press “SELECT” key to select
DC measure mode, connect the leads across to the tested circuit, the
current value and polarity the red lead connect with will appear on LCD.
Note:
1. If the current range is unknown beforehand, please switch the
FUNCTION to a high range and work down.
2. When the figure displayed "OL", it means over range. Please switch
FUNCTION to a higher range.
3. The max input current is 400mA or 10A depended on the jack used.
4. Excessive current will blow the fuse.
5. Do not input over DCV 36V or ACV 25V on “COM”, “mA” or “A” terminal.
4.7 AC Current True-RMS Measurement：
1. Insert the BLACK test lead to “COM” jack and RED test lead to the mA”
(max. 400mA) or "10A" jack (max. 10A).
2. Switch the FUNCTION to current range. Press “SELECT” key to select
AC measure mode, connect the leads across to the tested circuit, the
current value will appear on LCD.
Note:
1. If the current range is unknown beforehand, please switch FUNCTION to
a high range and work down.
2. If LCD displays "OL", it means over range. Please set the range knob to
a higher range.
3. The max input current is 400mA or 10A depended on the jack used.
4. Excessive current will blow the fuse.
5. Do not input over DCV 36V or ACV 25V on “COM”, “mA” or “A” terminal.
4.8 Resistance Measurement：
1. Connect the BLACK test lead to “COM” jack and RED test lead to the
“VΩHz” jack.
2. Please switch the FUNCTION to “Ω” range.
3. Please press "RANGE" to Auto/Manual measurement.
4. To measure small resistance, please short-circuit test leads first, and
press "REL" one time. Then, to measure the unknown resistance, and
ensure measured value is accuracy.
Note:

1. To use manual method, if the resistance range is unknown beforehand,
switch the FUNCTION to a higher range and work down.
2. When LCD displays "OL" signal, it means over-range. If measured
resistance is more than 1MΩ, the meter may take a few seconds to
stabilize. This is normal for high resistance setting.
3. When the input is not connected, i.e. at open circuit, the figure "OL" will
be displayed for the over range condition.
4. When checking resistance in the circuit, be sure that the power has been
switched off and all capacitors are fully discharged.
5. Do not input any voltage at this range.
4.9 Capacitance Measurement：
1. Switch the FUNCTION to " " position.
2. Connect the BLACK test lead to “COM” jack and RED test lead to the
“VΩHz” jack.
3. If the figure on LCD is not zero, press the “REL” key to zero.
4. Connect the tested capacitor to the leads, and the value will be displayed
on LCD.
Note:
1. Capacitance range has no manual measurement function.
2. Before measuring each time, please press "REL" to ensure accurate
measurement.
3. To avoid damage to the meter, please discharge all capacitors completely
before capacitance measurement.
4. 200uF range input digits take approx. 15 seconds to stabilize.
4.10 Frequency Measurement：
1. Connect test leads or shield cable to "COM" and "VΩHz” jack.
2. Switch the FUNCTION to the "Hz" range, and connect test leads or cable
to the source load for test.
3. Press "SELECT/Hz/Duty" to switch frequency/duty cycle, and displays
the reading of frequency or duty cycle.
Note:
1. Frequency range has no manual measurement function.
2. Do not apply more than 250V DC/AC peak value to the input.
3. Indication is possible at voltage higher than 10V AC rms, but readings
may be out of specification.
4. In the noisy environment, it is preferable to use shield cable for
measuring small signal.
5. Be caution to avoid contacting high voltage circuits when measurement
high voltage.
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4.11 hFE Measurement：
1. Switch the function to hFE range.
2. Check the transistor is NPN or PNP type, insert the emitter, base and
collector separately to the correct hole, the approximate value will be
displayed on LCD.
4.12 Diode and Continuity Test：
1. Connect the BLACK test lead to “COM” jack and RED test lead to the
“VΩHz” jack. (Notice the RED test lead should be +)
2. Switch the FUNCTION to “ ”, and test the diode.
3. Forward measurement: Connect RED test lead to the positive of the test
diode, BLACK test lead to the negative, then, reading of approx. forward
voltage of this diode will be displayed on LCD.
4. Reverse measurement: Connect BLACK test lead to the positive of the
test diode, RED test lead to the negative, the mark "OL" will be
displayed.
5. Complete diode test should include both steps. If the result doesn’t meet
above result, it means the diode is out of order.
6. Switch the FUNCTION to “ ” range.
7. Connect the test probes to two points of circuit, if the resistance is lower
than 50Ω, Buzzer will sound.
Note: Do not input voltage at or range.
4.13 Temperature Measurement：
1. Switch the function key to “℃/℉”range.
2. Insert two ends of the temperature sensor into “COM” and “VΩHz” jack,
and connect the work-point to the place where wanted to take
temperature. The value will be displayed on LCD.
3. Press”Select” key to select centigrade/ Fahrenheit mode.
NOTE:
1. When the input terminal is in open circuit, it will display the “normal
temp.”
2. Do not change the thermocouple, or the accuracy can not be secured.
3. Do not input voltage at this range.
4.14 Data hold：
Press “Hold” key, and the current data will be displayed on LCD; Press the
key again, and it will cancel the hold function.
4.15 Backlight：
Press “Hold” key for 2 sec. to turn on the backlight, and it will be
automatically off after 10 sec.
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