Pro's Kit MT-1706 User manual

MT-1706
3-5/6 True-RMS Digital Multimeter
User’s Manual
1st Edition, 2018
©2018 Copyright by Prokit’s Industries Co., Ltd.

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1. General Information
This digital multimeter is designed and manufactured in compliance with
IEC-61010 safety requirements on electronic measuring instruments and
hand-held digital multi-meters. It is compliant with IEC-61010 requirements
pertaining to 600V CAT IV, 1000V CAT.Ⅲand requirements on pollution
degree 2. Please read carefully this operation manual and pay attention to
safety guidelines before operating this meter.
1.1 Safety information
1.1.1 Safety instructions
Before operating this meter, the operator must observe all standard safety
procedures in the two respects below:
A. Safety procedures against electric shock
B. Safety procedures against unintended use
To ensure your personal safety, please use the test lead that accompanies
the meter. Before operating this meter, ensure that the test lead is
flawless.
1.1.2 Safety considerations
When the meter is used in the vicinity of the equipment that produces
strong electromagnetic interferences, the reading on the meter will grow
unstable and even produce serious errors.
Don't operate the meter or pen-shaped meter whose appearance is
damaged.
The safety function of the meter will become null if the meter is not
properly operated.
The meter must be operated with great care when working in the vicinity
of an exposed conductor or bus line.
The meter is prohibited from being used in the vicinity of any explosive
gas, vapor or dust.
The measurement must be made with correct input terminals and
functions and within the allowable measuring range.
To prevent the meter from being damaged, the value to be input shall not
exceed the extremes allowed by each measuring range.
When the meter has already been connected to the line being measured,
the operator is prohibited from touching the input terminal that is not in
service.
When the voltage measured exceeds 60Vdc or 30Vac (valid value), the
operator shall be careful enough to avoid electric shock.
When making measurement with a test lead, place your fingers behind its

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protective ring.
When switching to another measuring range, be sure that test lead has
already been taken off the measured circuit.
For all DC functions, to prevent potential electric shock as a result of
incorrect reading, please first useAC functions to check the absence of
any AV voltage. Then, select DC voltage measuring range equivalent to or
greater than that for AC voltage.
Before the tests on electric resistance, diode, capacitor or continuity, the
operator must cut off the power supply to the circuit to be measured, and
discharge all high-voltage capacitors within the circuit to be measured.
The electric resistance measurement or continuity test cannot be carried
out in any live electrical circuit.
Before the current measurement, the operator must first examine the
protective tube of the meter. Before connecting the meter to the circuit to
be measured, the operator must first power off the aforesaid circuit.
Before repairing TV sets or measuring power switching circuit, the
operator must be careful enough to prevent high amplitude voltage
impulse from damaging the meter.
This meter uses 4 x 1.5V AA batteries that must be correctly installed into
the battery compartment.
When appears, the batteries must be replaced immediately. The low
level of a battery will result in incorrect reading on the meter, which is
likely to bring electric shock or personal injury to the operator.
In measurement, category III voltage and category IV voltage shall not
exceed 1000V and 600V respectively.
Themetershallnot be in service ifits case(or partof itscase)is dismantled.
1.1.3 Safety symbol:
The safety symbols that appear on the meter's body and in this Operation
Manual:
Warning, an important safety symbol. The operator
must consult this Operation Manual before using the
meter. Unintended use may lead to the damage to
the device or its components.
AC (alternating current)
DC (direct current)
AC/DC
Ground

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Double insulation protection
Fuse
High voltage warning
CAT.III1000V
over-voltage protection
CAT. IV 600 V
over-voltage protection
1.1.4 Maintenance practices for safety
The operator must first pull out the test lead when the meter's case is
opened or the battery cover is dismantled.
The designated replacement parts must be used at the moment of
maintenance.
The operator must cut off all relevant power supplies before opening the
meter. At the same time, the operator must avoid damage to the meter's
elements by ensure that he himself doesn't carry any static.
The meter can only be calibrated, repaired and maintained by
professionals.
When the meter's case is opened, the operator must understand the fact
that the presence of some capacitance may promise the dangerous
voltages even if the power supply to the meter is cut off.
The operator should stop using and maintain the meter immediately if any
abnormality has been observed on the meter. The operator must see to it
that the meter cannot be in service unless it is proved conforming.
When the meter is left idle for a long period, the operator shall remove the
battery and place it in a place free from high temperature and humidity.
1.2 Input protection measures
The meter can sustain the maximum input voltage of 1000V (DC) or 750V
(AC) at the moment of voltage measurement.
The meter can sustain the maximumAC voltage of 600V or equivalent
voltage (valid value) when the tests on frequency, electric resistance,
continuity and diode are carried out.
The protective tube (FF630mA/250V) is used for protection purpose when
A and mAcurrent measurements are carried out.

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2. A Schematic Diagram for
the Meter
This meter is a hand-held digital
multi-meter with the function of
displaying True RMS. it is a
large-screen LCD unit with backlight
and illumination light functions so
that the user can easily recognize
reading. It is equipped with the
function of overload protection and
the indicator of battery under voltage.
Either for professionals, factories,
schools, enthusiasts or households,
it is an ideal multi-functional meter.
2.1 A Schematic Diagram for
the Meter
Physical appearance
①.Non-contact voltage detection area
②.Non-contact voltage indicator
③.LCD screen
④.hFE socket
⑤.Key
⑥.Rotary switch
⑦.Input socket
2.2 Description of the symbols on the display unit
Fig. 1 (Display panel)

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Table.1 Symbols
Symbol
Description
Battery under voltage indicator/ Low Battery
To avoid electric shock or personal injury as a
result of incorrect reading, promptly replace the
battery when the battery under voltage indicator
appears.
Auto power off indicator
High voltage warning
Negative input polarity indicator
Input voltage AC
Input voltage DC
Continuity test mode
Diode test mode
Automatic range measurement mode
Data hold mode
℃，℉
Unit of temperature(℃: Celsius; ℉: Fahrenheit)
%
Duty ratio
NCV
Non-contact AC voltage detection mode
Live
Live line judgment mode
hFE
HFE test mode
Table.1 Symbols (Continued)
V, mV
V:
mV：
V: the unit of volt
Millivolt，1x10-3 or 0.001 volt.
A, mA, A
A:
mA:
A:
Ampere, the unit of current.
Milliampere, 1x10-3 or 0.001 ampere.
Microampere, 1x10-6 or 0.000001
ampere.
, k, M
:
k:
M:
Ohm, the unit of electric resistance.
Kilohm, 1000 Ohm
Megaohm, 1,000,000 ohm.
MkHz
Hz:
KHz:
MHz:
Hz, the unit of frequency
KHz, 1x103Hz.
MHz, 1x106Hz or 1000 KHz.

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mF,F, nF
F:
mF:
F:
nF:
Farad, the unit of capacitance.
Millifarad, 1x10-3 or 0.001 farad.
Microfarad, 1x10-6 or 0.000001 farad.
nF, 1x10-9 or 0.000000001 farad.
2.3 Description of functional keys
Key
Description of functions
SEL
SEL keys, e.g.
Temperature measurement position: ℃mode or ℉
mode.
Frequency measurement position: HZ measurement
mode or duty ratio (%) measurement mode
AC voltage position and AC current position: press
the key to select voltage/frequency mode or
current/frequency mode in the AC voltage
measurement mode orAC current measurement
mode.
HOLD
Press the key to hold the measured value for the
current moment Press the key again to cancel this
function.
Press the key for 2 seconds and more, the
backlight and the illumination indicator will be
on; however, with another 2-second press on
the same key, you will turn off backlight and
illumination indicator. If you don't press the key
at all, the function will automatically be
disenabled in 15 minutes.
2.4 Description of input socket
Input socket
Description
COM
All public input terminals to be measured are
connected to test leads in black or the public output
plugs of exclusive multi-function test sockets.
℃/℉
VHz%
lives
Positive input terminals (connected to a test lead in
red) for capacitor measurement, diode
measurement, beep on/off test, temperature
measurement, voltage measurement, electric
resistance, frequency, duty ratio and live/earth line
judgment.
A mA
A and mA positive input terminal (connected to a
test lead in red).
20A
20A positive input terminal (connected to a test lead
in red).

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2.5 Accessories
1.Operation Manual
X 1
2. Test lead
X 1 pair
3.K-Type thermocouple
X 1
3. Operational guidelines
3.1 Normal operation
3.1.1 Hold mode
In the hold mode, the reading can be maintained on the display unit.
Changing the measurement function position or pressing the key.
Hold again to exit the hold mode
Hold mode: entry and exit
1. Press the key “H/ ” and the reading will be held and the symbol
“ ” will appear on the LCD screen.
2. Press the key “H/ ” again to restore the meter to its status for
normal measurement.
3.1.2 Backlight
The meter is equipped with the functions of backlight so that the operator
can access measurement results even if he is in a darker place. The
backlight function can be enabled or disenabled by the steps below:
1. Press the key" H/ " for over 2 seconds to enable backlight .
2. Press the key" H/ " for over 2 seconds to again to manually
disenable backlight; wait for 15 seconds until the backlight is
automatically disenabled.
3.1.3 Auto power off
If no operations are made in 15 minutes following the initialization, the meter
will sound to remind the operator to automatically cut off power supply and
enter the state of dormancy. The meter can be rebooted when the operator
presses any key in the auto power off mode.
3.2 Measurement guidelines
3.2.1 Measurement of AC voltage and DC voltage

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To avoid any electric shock and/or damage to the meter, do
not attempt a voltage measurement if the voltage (valid
value) is 1,000V for DC current or 750V for AC current.
To avoid any electric shock and/or damage to the meter,
don't attempt to impose between any public terminal and
ground any voltage whose valid value is over 1,000V for DC
current or 750V for AC current.
The meter provides DC voltage measuring ranges as follows: 600.0mV,
6.000V, 60.00V, 600.0V and 1000V, and AC voltage measuring ranges:
6.000V, 60.00V, 600.0V and 750V.
Measurement of AC voltage or DC voltage
Turn the rotary switch to the position ～V or V.
Connect the test lead in black and test lead in red to COM input socket
and V input socket respectively.
Use another two ends of the test lead to measure the voltage of the
circuit to be measured. (In parallel connection with the circuit to be
measured)
Read the measured voltage value on LCD screen. When DC voltage
measurement is attempted, the display unit will show the voltage
polarity of the circuit connected to the pen-shaped meter in red.
Notes:
Within the measuring range of DC voltage of 600mV and AC voltage of
6V, even if there is no input or no connection to the test lead, the meter
will display some information. In this situation, press short circuit “V－
” and “COM” terminal to reset the meter to zero.
Within theAC voltage function, press the key "SEL" to measure the
frequency of theAC voltage source. Please refer to the relevant part for
frequency measurement.
The value of theAC voltage measured with this meter is True RMS (root
mean square). These measurements are accurate for sine wave and
other waves (without DC offset), square wave, triangular wave and step
wave.
3.2.2 Electric resistance measurement
To avoid the meter or the measured equipment from damage,
do not attempt a resistance measurement unless the operator
has already cut off all power sources for the circuit to be

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measured and fully discharged all high-voltage capacitors.
Ohm is the unit of electric resistance ().
The measuring ranges of electric resistance of this meter are 600.0,
6.000k, 60.00k, 600.0k, 6.000Mand 60.00M,
Measurement of electric resistance
1. Turn the rotary switch to the appropriate position.
2. Connect the test lead in black and test lead in red to COM input
socket and V/input socket respectively.
3. Use another two ends of the test lead to measure the electric
resistance of the circuit to be measured.
4. Read the measured electric resistance value on LCD screen.
Notes:
The measured value of the electric resistance of the circuit differs a
bit from the rated value of the electric resistance.
To ensure measurement accuracy, in attempting a low resistance
measurement, first put two pen-shaped meters in short circuit and
capture the resistance reading of these short circuits. Then subtract
the aforesaid reading from the measured resistance.
At 60Mposition, you have to wait a few seconds before the reading
grow stable. This is quite normal for a high resistance
measurement.
When the meter is in open circuit, the display unit will show "OL" that
indicates the measured value is over the measuring range.
3.2.3 Diode test
To avoid the meter or the measured equipment from damage,
do not attempt a diode test unless the operator has already
cut off all power sources for the circuit to be measured and
fully discharged all high-voltage capacitors.
Diode test outside the circuit:
1. Turn the rotary switch to the position .
2. Connect the test leads in black and in red to COM input socket and
V/input socket respectively.
3. Connect the test leads in black and in red to the positive and
negative poles of the diode to be tested respectively.
4. The meter displays the forward bias value of the diode to be tested. If

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the polarity of the test lead is reversed, the meter will display "OL".
A normal diode still produces a forward voltage drop of 0.5V to 0.8V; the
reverse bias voltage reading depend on the variation in electric resistance of
other channels between two pen-shaped meters.
3.2.4 Beep continuity test
To avoid the meter or the measured equipment from damage,
do not attempt a beep continuity test unless the operator has
already cut off all power sources for the circuit to be
measured and fully discharged all high-voltage capacitors.
Steps for a continuity test:
1. Turn the rotary switch to the position .
2. Connect the test lead in black and test lead in red to COM input
socket and V/input socket respectively.
3. Use another two ends of the test lead to measure the resistance of
the circuit to be measured. If the measured distance is no more than
30Ω, the sensor LED (green indicator) will be on and the beeper will
sound continuously. If the measured resistance is between 40and
60Ω, the sensor LED (red indicator) will be on.
3.2.5 Capacitance measurement
To avoid the meter or the measured equipment from damage,
do not attempt a capacitance measurement unless the
operator has already cut off all power sources for the circuit
to be measured and fully discharged all high-voltage
capacitors. Use the DC voltage position to determine that all
capacitors have been discharged.
The measuring ranges for the capacitance of this meter are 6.000nF,
60.00nF, 600.0nF, 6.000F, 60.00F and 600.0F,6mF,60mF.
Measurement of capacitance:
1. Turn the rotary switch to the position 60mF.
2. Connect the test leads in black and in red to COM input socket and
input socket respectively.
3. Use another two ends of the test lead to measure the capacitance
of the capacitor to be measured, and capture the measured value
on LCD screen.

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Note:
The measurement of a large capacitance requires a given period of
stabilization of reading.
To avoid damage to the meter, the measurement of a capacitor with
polarities requires much attention to its polarity.
3.2.6 hFE measurement
To avoid any electric shock and/or damage to the meter, do
not attempt a frequency measurement if the voltage is over
36V for DC current or AC current(valid value).
Frequency measurement:
1. Turn the rotary switch to the position hFE.
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.
3.2.7 Frequency measurement
To avoid any electric shock and/or damage to the meter, do
not attempt a frequency measurement if the voltage is over
250V for DC current or AC current(valid value).
Frequency measurement:
3. Turn the rotary switch to the position HZ%.
4. Connect the test leads in black and in red to COM input socket
and Hz input socket respectively.
5. Use another two ends of the test lead to measure the frequency of
the circuit to be measured.
6. Read the measured frequency on LCD screen.
3.2.8 Current measurement
Do not attempt a measurement on the current in a circuit, if
when the voltage between the open-circuit voltage and the
ground is over 250V. If the fuse is blown at the moment of
measurement, you are likely to damage the meter or get
yourself hurt.
To avoid any damage to the meter or equipment to be
measured, do not attempt a current measurement unless you
have examined the meter's protective tube. In attempting a
measurement, you should use the correct input sockets,

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function positions and measuring ranges. When a test lead is
inserted into the current input socket, do not put the other
end of the test lead in parallel connection with any circuit.
The meter provides DC current measuring ranges as follows: 60A,
60.00mA, 600.0mAand 20.00A; andAC current measuring ranges:
60.00mA, 600.0mA, and 20.00A.
Measurement of current:
1.Turn the rotary switch to the appropriate position.
2.Connect the test lead inblack to COM input socket. Connect the test
lead in red to a mA input socket when the measured current is less
than 600mA; connect the test lead in red to a 20Ainput socket when
the measured current is 600mA~20A.
3.Disconnection of the circuit to be measured Connect the test lead
in black to the end of disconnected circuit (the voltage is lower) and
connect the test lead in red to the end of the disconnected circuit
(voltage is higher).
4.Connect the power to the circuit and capture the displayed reading.
If the display unit only shows "OL", it means the input is over the
selected measuring range. At this moment, turn the rotary switch to
a higher measuring range.
3.2.9 NCV test (non-contact voltage detection)
Turn the rotary switch to NCV position, and place the top of the meter
approach the conductor. If the meter detects theAC voltage, the indicators
for signal density (high, medium and low) will be on in accordance with the
detected density, while the beeper will sounds alarms at different
frequencies.
Note:
1: Voltage may still remain in the absence of any indication. The operator
shall not rely on non-contact voltage detector to check the presence of
voltage. The detection operation may be affected by various factors,
including socket design, insulation thickness and type.
2. When the voltage is input into the meter's input terminal, the voltage
sensor LED may be on as a result of induced voltage.
3. External sources of interference (like flashlight and motor) may trigger
non-contact voltage detection.

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3.2.10 Live line test
1. Turn the rotary switch to the position Live.
2. Connect the test lead in red to Live input socket.
3. When a single test lead is inserted into jack L of power socket or
approaches a live conductor, if the meter detects AC voltage, the
meter's indicatorforthe intensity (high, medium and low) of induced
voltage signal will be on and the beeper sounds alarms for different
intensities.
3.2.11 Measuring temperature
Put the range switch at the gear of ℃/℉. Insert the red plug of the
thermocouple into the end of ℃, and insert the black plug of the
thermocouple into COM socket. Directly read the temperature value from
the display screen after the reading is stable.
Notes: The maximum measuring temperature for the K-type thermocouple
dispatched at random is 250℃, and its instant measuring value can reach
300℃.
4. Technical parameters
4.1 Overall parameters
Operating environment:
600V CAT Ⅳand 1000V CAT. ⅢPollution level: 2
Altitude < 2000 m
Working temperature & humidity: 0~40OC (The requirements will not be
considered when temperature is less than 10℃and relative
humidity is below80%).
Storage temperature & humidity: -10~60OC (batteries shall be removed
when RH is below 70%).
Coefficient of temperature: 0.1accuracy/OC (<18OC or >28OC).
Allowable max voltage between terminal to be measured and ground:
1000V DC or 750V AC (valid value)
Protection of protective tube: mA position: protective tube FF 630mA/250V;
A position protective tube 10A/250V
Rotation rate: approximately 3 revolutions/second
Display unit: 6000 counts displayed on LCD screen. Automatically display
the symbol for unit in accordance with measurement function position.
Outrange indication: the LCD screen will display "OL".
Battery Low indication: “ ” will appear when the battery's voltage is
below the normal working voltage.

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Input polarity indication: “” will automatically appear.
Power: 4 x 1.5V AA battery
Dimensions: 192 mm(L)×89mm(W)×55mm(H).
Weight: approximately 330g (not included batteries or test leads)
4.2 Precision indicator
Accuracy: (reading + digit)
The accuracy warranty will run for 1 year upon the ex-factory date.
Reference conditions: ambient temperature is between 18℃and 28℃and
relative humidity is no more than 80.
4.2.1 DC voltage
Measuring range
Resolution
Accuracy
600mV
0.1mV
±(0.5% Reading + 3 digits)
6V
1mV
60V
10mV
600V
100mV
1000V
1V
±(0.5% Reading +3 digits)
Input impedance:10M
Maximal input voltage: 1000Vdc or 750Vac valid value
4.2.2 AC voltage
Measuring range
Resolution
Accuracy
6V
1mV
±（0.8% readings +3 digits）
60V
10mV
600V
100mV
±（1% readings +10 digits）
750V
1V
Input impedance:10M
Maximal input voltage: 1000Vdc or 750Vac valid value
Frequency response: 40Hz-1kHz True RMS
4.2.3 Frequency
Measuring range
Resolution
Accuracy
9.999Hz
0.001Hz
± (1% Reading +3 digits)
99.99Hz
0.01Hz
999.9Hz
0.1Hz
9.999KHz
0.001 KHz

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99.99KHz
0.01 KHz
999.9KHz
0.1 KHz
9.999MHz
0.001MHz
Input voltage range: 200mV-10V ac valid value
Overload protection: 600V DC/AC
4.2.4 Electric resistance
Measuring range
Resolution
Accuracy
600
0.1
±(0.8% Reading + 3 digits)
6k
1
60k
10
600k
100
6M
1k
60M
10k
±(1.2% Reading +30 digits)
Overload protection: 600V DC/AC
Open-circuit voltage: 1V
4.2.5 Diode
Functions
Measurin
g range
Resolution
Testing conditions
Diode test
0-3V
0.001V
Forward DC current:
approximately 1mA;
Open-circuit voltage:
approximately 3.2V.
The display unit shows the
approximate value of the
diode's forward voltage
drop.
Overload protection: 600V DC/AC
4.2.6 Beeper continuity
Functio
ns
Measuri
ng
range
Resolution
Description
Testing
conditions
600
0.1
When the built-in beeper
sounds and the
accompanying green
indicator is on, the
Open-circuit
voltage:
approximatel
y 1V

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measured resistance is
no greater than 30, in
approximately 40Ω-60Ω,
The red indicator will be
on.
Overload protection: 600V DC/AC
4.2.7 Capacitor
Measuring range
Resolution
Accuracy
6nF
0.001nF
± (4.0% Reading +30 digits)
60nF
0.01nF
± (4.0% Reading +3 digits)
600nF
0.1nF
6F
1nF
60F
10nF
600F
100nF
6mF
1uF
60mF
0.01mF
± (5.0%Reading+ 3digits)
Overload protection: 600V DC/AC
4.2.8 hFE
Functions
Value
Testing conditions
NPN or PNP
0~2000
Basic current is approx.
10uA,Vce is approx.2.8V
4.2.9 DC current
Measuring range
Resolution
Accuracy
60A
0.01A
±(0.8% Reading + 3 digits)
60mA
0.01mA
600mA
0.1mA
20.00A
10mA
±(1.2% Reading + 3 digits)
Overload protection:
protective tube for mA measuring range (FF630mA/250V) ;
protective tube for 20A measuring range (10A/250V) .
Maximal input current: mA position: 600mA DC/AC (valid value);
20A position: 20A DC/AC (valid value)
When the measured current is10A~20A, must use another 20A test lead
MT-9908.This test lead is not included
When the measured current is over 5A, the duration of continuous
measurement shall not be over 10 seconds. The current measurement shall
be carried out 1 minute after the completion of previous measurement.

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4.2.10 AC current
Measuring range
Resolution
Accuracy
60mA
0.01mA
±(1% Reading + 3 digits)
600mA
0.1mA
20A
10mA
±(1.5% Reading + 3 digits)
Overload protection:
protective tube for mAmeasuring range (FF630mA/250V) ;
protective tube for 20A measuring range (10A/250V) .
Maximal input current: mA position: 600mA DC/AC (valid value);
20A position: 20A DC/AC (valid value)
When the measured current is10A~20A, must use another 20A test lead
MT-9908.This test lead is not included
When the measured current is over 5A, the duration of continuous
measurement shall not be over 10 seconds. The current measurement shall
be carried out 1 minute after the completion of previous measurement.
Frequency response: 40Hz-1kHz True RMS
4.2.11 Temperature (depends on different model, only for
the instruments with it)
Measuring
range
Resolution
Accuracy
℃
1℃
-20℃~1000℃
(1.0%+3) reading
℉
1℉
-4℉~ 1832℉
(1.0%+3) reading
Overload protection: 600V DC/AC
5. Meter maintenance
This section provides the basic information on maintenance, including the
descriptions about replacement of protective tubes and batteries. Do not
attempt the meter maintenance unless you are experienced in maintenance
and have read the information on calibration, performance test and
maintenance. .
5.1 General maintenance
To avoid any electric shock or damage to the meter, do not
attempt to clean the inside of the meter. You must remove
the line connecting a test lead to input signals, before
opening the case or battery cover.
You must regularly use damp cloth and a small quantity of detergent to

18
clean the meter's shell. Don't attempt the use of any abrading or chemical
solvent.
The dirty or damp input socket may affect reading.
Steps for cleaning input sockets:
Disenable the meter and pull all test leads out of the input socket.
Clean up all dirty substances on sockets.
Use a new cotton ball with a detergent or lubricant to clean each socket,
because lubricant can prevent the socket vulnerable to dampness from
pollution.
5.2 Battery & fuse replacement
To avoid any electric shock or personal injury as a result
of incorrect reading, replace batteries once the symbol
“ ” appear on the display unit.
Only the designated fuse (630mA/250V,10A/250V
quick-acting fuse) can be used.
To avoid any electric shock or personal injury, don't
attempt to open the battery cover to replace batteries,
unless you have already powered off the device and
carried out an examination to ensure that the test lead has
been disconnected from the circuit to be measured.
Battery replacement:
1. Turn off the power of the meter.
2. Disconnect all test leads from the input socket.
3. Use a screwdriver to remove the screw of battery cover.
4. Take off the battery cover.
5. Take out the old batteries carefully and replace with 4 pcs 1.5 VAA new
batteries.
6. Fix the battery cover.
Fuse replacement
When fuse is blown, replace with the same type of fuse.
1. Turn off the power of the meter and take out the holster.
2. Use a screwdriver to remove the screw of back cover.
3. Take off the back cover.
4. Remove the blown fuse and replace with the same type of fuse
5. Screw the back cover
6. Put the holster back.

19
MT-1706-C 3-5/6 真有效值電表
1. 概述
Pro’sKit MT- 1706 3-5/6 數位多用表是根據國際電工安全標準 IEC－
61010 對電子測量儀器和掌上型數位多用表的安全要求而設計生產的。
符合 IEC61010 的600V CAT Ⅳ、1000V CAT. Ⅲ和污染程度 2要求。
使用本儀錶前，請仔細閱讀使用說明書並請注意有關安全工作準則。
1.1. 安全資訊
安全說明
使用本儀錶時，使用者必須遵守關於以下兩方面的全部標準安全規程：
A 防止電擊方面的安全規程
B 防止错误使用仪表方面的安全规程
為保證人身安全，請使用隨表提供的測試筆。在使用前，檢查並確保它們
是完好的。
安全注意事項
‧在電磁干擾比較大的設備附近使用儀錶，儀錶的讀數會不穩定，甚至
可能會產生較大的誤差。
‧當儀錶或表筆外觀破損時，請不要使用。
‧若不正確使用儀錶，儀錶提供的安全功能可能會失效。
‧在裸露的導體或匯流排周圍工作時，必須極其小心。
‧禁止在爆炸性的氣體、蒸汽或灰塵附近使用本儀錶。
‧必須使用正確的輸入端、功能、量程來進行測量。
‧輸入值切勿超過每個量程所規定的輸入極限值，以防損壞儀錶。
‧當儀錶已連接到被測線路時，切勿觸摸沒有使用的輸入端。
‧當被測電壓超過 60Vdc 或30Vac 有效值時，小心操作防止電擊。
‧使用測試筆測量時，應將手指放在測試筆的護環後面。
‧在轉換量程之前，必須保證測試筆已經離開被測電路。
‧對於所有的直流功能，為避免由於可能的不正確讀數而導致電擊的危
險，請先使用交流功能來確認是否有任何交流電壓的存在。然後，選
擇一個等於或大於交流電壓的直流電壓量程。
‧在進行電阻、二極體、電容測量或通斷測試前，必須先切斷被測電路
電源，並將被測電路裏所有的高壓電容器放電。