Minipa MT-1400 User manual

MANUAL DE INSTRUÇÕES
Instructions Manual
Manual de Instrucciones
*Only illustrative image./Imagen meramente ilustrativa./Imagem meramente ilustrativa.
MULTÍMETRO DIGITAL
Digital Multimeter
MT-1400

1
INDEX
1) OVERVIEW........................................................................................ 02
2) ACCESSORIES ................................................................................. 02
3) SAFETY INFORMATION ................................................................... 02
4) RULES FOR SAFE OPERATION...................................................... 03
5) INTERNATIONAL ELECTRICAL SYMBOLS.................................... 05
6) THE METER STRUCTURE ............................................................... 05
7) FUNCTIONAL BUTTONS.................................................................. 05
8) MEASUREMENT OPERATION......................................................... 06
A. DC Voltage Measurement........................................................... 06
B. AC Voltage Measurement ........................................................... 07
C. DC Current Measurement .......................................................... 08
D. Resistance Measurement........................................................... 09
E. Diode and Continuity Measurement ........................................... 10
F. Temperature Measurement ......................................................... 12
9) GENERAL SPECIFICATIONS........................................................... 13
10) ACCURACY SPECIFICATIONS...................................................... 13
A. DC Voltage.................................................................................. 14
B. AC Voltage .................................................................................. 14
C. DC Current ................................................................................. 14
D. Resistance.................................................................................. 14
E. Diode and Continuity Test........................................................... 15
F. Temperature ................................................................................ 15
11) MAINTENANCE............................................................................... 15
A. General Service .......................................................................... 16
B. Replacing the Battery ................................................................. 16
C. Replacing the Fuse..................................................................... 17
12) WARRANTY..................................................................................... 18
 A.WarrantyCerticateRegistrationProcedures............................. 19

2
1) OVERVIEW
ThisInstructionsManualcoversinformationonsafetyandcautions.Ple-
ase read relevant information carefully and observe all the Warnings and
Notes strictly.
Warning
To avoid electric shock or personal injury, read the “Safety Informa-
tion” and “Rules for Safety Operation” carefully before using the Meter.
The digital multimeter ET-1400 (hereafter referred as “the Meter”) is 3 1/2
digits with steady operations, fashionable design and highly reliable hand-
held measuring instrument. The Meter can measure AC/DC voltage, AC/
DC Current, Resistance, Temperature, Diode and Continuity. It is an ideal
tool for maintenance.
2) ACCESSORIES
Open the package case and take out the Meter. Check the following items
carefully to see any missing or damaged part:
Item Description Quantity
1Instruction Manual 1 piece
2Test Lead 1 pair
3TemperatureProbe 1 piece
4Holster 1 piece
Intheeventyoundanymissingordamage,pleasecontactyourdealer
immediately.
3) SAFETY INFORMATION
This Meter complies with the standards IEC61010: in pollution degree 2,
overvoltage category (CAT I 600V, CAT II 300V) and double insulation.

3
CAT. I: Signal level, special equipment or parts of equipment, telecom-
munication, electronic, etc., with smaller transient overvoltages than
overvoltages CAT. II.
CAT.II:Locallevel,appliance,PORTABLEEQUIPMENTetc.,withsmaller
transient overvoltages than CAT. III.
UsetheMeteronlyasspeciedinthisoperatingmanual,otherwisethe
protection provided by the Meter may be impaired.
In this manual, a Warning identiesconditionsandactionsthatposehaz-
ards to the user, or may damage the Meter or the equipment under test. A
Note identiestheinformationthatusershouldpayattentionon.
International electrical symbols used on the Meter and in this Operating
Manual are explained on page 5.
4) RULES FOR SAFE OPERATION
Warning
To avoid possible electric shock or personal injury, and to avoid pos-
sible 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. Replace damaged test leads with identical
modelnumberorelectricalspecicationsbeforeusingtheMeter.
•Do not apply more than the rated voltage, as marked on the Meter,
between the terminals or between any terminal and grounding.

4
•The rotary switch should be placed in the right 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,inammableandstrongmagneticeld.Theperfor-
mance of the Meter may deteriorate after dampened.
• Whenusingthetestleads,keepyourngersbehindthengerguards.
•Disconnect circuit power and discharge all high-voltage capacitors before
testing resistance, continuity, diodes and current.
•Before measuring current, check the Meter’s fuses and turn off power
to the circuit before connecting the Meter to the circuit.
•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 test leads and temperature probe from the Meter and turn the
Meter power off before opening the Meter case.
•When servicing the Meter, use only the same model number or identical
electricalspecicationsreplacementparts.
•The internal circuit of the Meter shall not be altered at will to avoid dam-
age of the Meter and any accident.
•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 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.

5
5) INTERNATIONAL ELECTRICAL SYMBOLS
6) THE METER STRUCTURE
1. LCD Display
2. HOLD Button
3. Display Backlight Button
4. Rotary Switch
5. COM Input Terminal
6. 10A Input Terminal
7. VΩmA°C°F Input Terminal
Figure 1
7) FUNCTIONAL BUTTONS
Below table indicated for information about the functional button operations.
4
6
AC or DC
AC (Alternate Current)
DC (Direct Current)
Earth
Doble Insulation
Low Battery
Diode
Fuse
Continuity Test
Safety Rules
In Agreement with European Comumnity Standard

6
8) MEASUREMENT OPERATION
A. DC Voltage Measurement
Warning
To avoid harms to you or damages to the Meter from electric shock,
please do not attempt to measure voltages higher than 500V although
readings may be obtained.
The DC Voltage ranges are: 200mV,
2000mV, 20V, 200V and 500V. To
measure DC voltage, connect the
Meter as follows:
1. Insert the red test lead into the
VΩmA°C°F terminal and the black
test lead into the COM terminal.
2. Set the rotary switch to an appro-
priate measurement position V .
3. Connect the test lea-
ds over the object being me-
asured. The measured value
shows on the display. Figure 2
Key Executed Operation
HOLD
Key
-PressHOLDoncetoenterHOLDmode.
-PressHOLDagaintoleaveHOLDmode.
- When Hold mode is activated, H is displayed and the
presentvalueisfrozen.
BLUE
Key
-PressBLUEkeyoncetoturnonthedisplaybacklight.
-PressBLUEkeyagaintoturnoffthedisplaybacklight.
-ThedisplaybacklightwillNOTturnoffuntilBLUEkeyis
pressed.

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Note
•If the value of voltage to be measured is unknown, use the maximum
measurement position (500V) and reduce the range step by step until a
satisfactory reading is obtained.
•The LCD displays “1” indicating the existing selected range is overload;
it is required to select a higher range in order to obtain a correct reading.
•In each range, the Meter has an input impedance of approx. 10MΩ.
This loading effect can cause measurement errors in high impedance
circuits. If the circuit impedance is less than or equal to 10kΩ, the error
is negligible (0.1% or less).
•When DC voltage measurement has been completed, disconnect the
connection between the testing leads and the circuit under test.
B. AC Voltage Measurement
Warning
To avoid harms to you or damages to the Meter from electric shock,
please do not attempt to measure voltages higher than 500V RMS
although readings may be obtained.
The AC voltage measurement positions are: 200V and 500V. To measure
AC Voltage, connect the Meter as follows, noting the Figure 2:
1. Insert the red test lead into the VΩmA°C°F terminal and the black test
lead into the COM terminal.
2. Set the rotary switch to an appropriate measurement position V .
3. Connect the test leads across with the object being measured. The
measured value shows on the display, which is effective value of sine
wave (mean value response).
Note
•If the value of voltage to be measured is unknown, use the maximum
measurement position (500V) and reduce the range step by step until a
satisfactory reading is obtained.

8
•The LCD displays “1” indicating the existing selected range is overload,
it is required to select a higher range in order to obtain a correct reading.
•In each range, the Meter has an input impedance of approx. 5MΩ. This
loading effect can cause measurement errors in high impedance circuits.
If the circuit impedance is less than or equal to 5kΩ, the error is negligible
(0.1% or less).
•When AC voltage measurement has been completed, disconnect the
connection between the testing leads and the circuit under test.
C. DC Current Measurement
Warning
Never attempt an in-circuit current
measurement where the voltage
between terminals and ground is
greater than 60V.
If the fuse burns out during mea-
surement, the Meter may be dam-
aged or the operator himself may
be hurt. Use proper terminals,
function, and range for the mea-
surement. When the testing leads
are connected to the current termi-
nals, do not parallel them across
any circuit.
Figure 3
The DC current ranges are: 2000µA, 20mA, 200mA and 10A.
To measure current, do the following:
1. Turn off power to the circuit. Discharge all high-voltage capacitors.

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2. Insert the red test lead into the VΩmA°C°F or 10A terminal and the black
test lead into the COM terminal.
3. Set the rotary switch to an appropriate measurement position A .
4. Break the current path to be tested. Connect the red test lead to the more
positive side of the break and the black test lead to the more negative
side of the break.
5. Turn on power to the circuit.
The measured value shows on the display.
Note
•For safety purpose, the time for each high current measurement must be
less than 10 seconds and the interval time between two measurements
must be more than 15 minutes.
•If the value of current to be measured is unknown, use the maximum
measurement position (10A) and reduce the range step by step until a
satisfactory reading is obtained.
• When current measurement has been completed, disconnect the con-
nection between the testing leads and the circuit under test.
D. Resistance Measurement
Warning
To avoid damages to the Meter or
to the devices under test, discon-
nect circuit power and discharge all
the high-voltage capacitors before
measuring resistance.
The resistance measurement ranges
are: 200Ω, 2000Ω, 20kΩ, 200kΩ
and 20MΩ. To measure resistance,
connect the Meter as follows:
1. Insert the red test lead into the
VΩmA°C°F terminal and the black
test lead into the COM terminal. Figure 4

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2. Set the rotary switch to an appropriate measurement position Ω.
3. Connect the test leads across with the object being measured. The
measured value shows on the display.
Note
•The test leads can add 0.1Ωto 0.3Ωof error to resistance measurement.
To obtain precision readings in low-resistance measurement, that is the
range of 200Ω, short-circuit the input terminals beforehand and record
the reading obtained. And from the subsequent reading, always subtract
this value from the display reading.
•If the reading of Ωwith the test leads short-circuited is not ≤0.5Ω, check
if the test leads are not loosen, wrong function selection, or Data Hold
function enabled.
•For high-resistance measurement (>1MΩ), it is normal taking several
seconds to obtain a stable reading.
•When resistance measurement has been completed, disconnect the
connection between the testing leads and the circuit under test.
E. Diode and Continuity Test
Warning
To avoid damages to the Meter or
to the devices under test, discon-
nect circuit power and discharge all
the high-voltage capacitors before
diode and continuity test.
Usethediodetesttocheckdiodes,
transistors, and other semiconductor
devices. The diode test sends a
current through the semiconductor
junction, and then measures the volt-
age drop across the junction. A good
silicon junction drops between 0.5V
and 0.8V.
Figure 5

11
To test a diode out of a circuit, connect the Meter as follows:
1. Insert the red test lead into the VΩmA°C°F terminal and the black test
lead into the COM terminal.
2. Set the rotary switch to .
3. For forward voltage drop readings on any semiconductor component,
place the red test lead on the component´s anode and place the black
test lead on the component´s cathode. The measured value shows on
the display.
Note
•In a circuit, a good diode should still produce a forward voltage drop
reading of 0.5V to 0.8V; however, the reverse voltage drop reading can
vary depending on the resistance of other pathways between the probe
tips.
•Connect the test leads to the proper terminals as said above to avoid error
display. The LCD will display “1” indicating open-circuit for wrong con-
nection. The unit of diode is Volt (V), displaying the positive-connection
voltage-drop value.
•When diode testing has been completed, disconnect the connection
between the testing leads and the circuit under test, and remove the
test leads from the Meter terminals.
To test for continuity, connect the Meter as below:
1. Insert the red test lead into the VΩmA°C°F terminal and the black test
lead into the COM terminal.
2. Set the rotary switch to .
3.Connectthetestleadsacrosswiththeobjectbeingmeasured.Thebuzzer
sounds if the resistance of a circuit under test is less than approximately
70Ω.
Note
•The LCD displays 1 indicating the circuit being tested is open.
•When continuity testing has been completed, disconnect the connection

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between the testing leads and the circuit under test..
F. Temperature Measurement
Warning
To avoid harms to you or damages
to the Meter, please do not attempt
to input voltages higher than 60V
in DC or 30V in AC RMS.
The temperature measurement range
is: -40°C to 1000°C. To measure
temperature, connect the Meter as
follows:
1. Insert the red temperature probe
into the VΩmA°C°F terminal and
the black temperature probe into
the COM temperature.
2. Set the rotary switch to °C or °F.
Figure 10
3.Placethetemperatureprobetotheobjectbeingmeasured.Themeasured
value shows on the display.
Note
•The Meter automatically displays the temperature value inside the Meter
when there is no temperature probe connection.
•The included point contact temperature probe can only be used up to
250°C(482°F). For any measurement higher than that, the others rod
type temperature probes must be used instead.
•When temperature measurement has been completed, disconnect the
connection between the testing leads and the circuit under test.

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9) GENERAL SPECIFICATIONS
•Maximum Voltage between any Terminals and Grounding: 500V RMS.
•FusedProtectionforVΩmA°C°F Input Terminal: 0.3A, 250V fuse,
fast type, 5x20mm.
• 10AInputTerminal:Un-fused.
•Range Selection: Manual.
•Maximum Display Counts: 1999.
• MeasurementSpeed:Updates2~3times/second.
•Temperature: Operation: 0°C to 40°C (32°F to 104°F).
Storage: -10°C to 50°C (14°F to 122°F).
•Relative Humidity: ≤75% @ 0°C – 30°C, ≤50% @ 31°C – 40°C.
•Altitude: Operation: 2000m.
Storage: 10000m.
• BatteryType:Onepieceof9Vbattery(NEDA1604or6F22or006P).
•Low Battery Indicator: .
• NegativeReading:Display-.
•Overload Indication: 1.
•Safety/Compliances: IEC1010 Overvoltage CAT I 600V, CAT II 300V and
Double Insulation.
• Certication:CE.
•Dimensions: 130(H) x 73.5(W) x 35(D)mm.
•Weight: Approximately 156g (including battery).
10) ACCURACY SPECIFICATIONS
Accuracy: ± (a% reading + b digits), guarantee for 1 year.
Operation temperature: 23°C ± 5°C.
Relative humidity: < 75%.
Temperaturecoefcient:0.1x(speciedaccuracy)/1°C.

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A. DC Voltage
Range Resolution Accuracy Overload Protection
200mV 0.1mV
± (0.5%+2)
250V DC or AC
2000mV 1mV
500V DC or AC
20V 10mV
200V 100mV
500V 1V ± (0.8%+2)
Remarks: Input Impedance 10MΩ.
B. AC Voltage
Range Resolution Accuracy Overload Protection
200V 100mV ± (1.2%+10) 500V DC or AC
500V 1V
Remarks:
•Input Impedance 5MΩ.
•Displays effective value of sine wave (mean value response).
• FrequencyResponse:40Hzto400Hz.
C. DC Current
Range Resolution Accuracy Overload Protection
2000A 1A± (1%+2) Fuse 0.3A, 250V, fast,
5x20mm
20mA 10A
200mA 100A± (1.2%+2)
10A 10mA ± (2%+5) UNFUSED
Remarks:
•10A Range: Continuous measurement ≤10 seconds and interval not
less than 15 minutes.
D. Resistance
Range Resolution Accuracy Overload Protection
2000.1± (0.8%+5)
250V Dc or AC
 1
± (0.8%+2)
20k10
200k100
20M10k± (1%+5)

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E. Diode and Continuity Test
Range Resolution Accuracy Overload
Protection
1mV Displays the direct drop voltage:
0.5V~0.8V 250V DC or AC
1Sonorous Signal when < 70 
F. Temperature
Range Resolution Accuracy Overload Protection
-40°C~150°C 1°C ± (1%+3)
250V DC ou AC
150°C~1000°C ± (1.5%+15)
-40°F~302°F 1°F ± (1%+4)
302°F~1832°F ± (1.5%+15)
11) MAINTENANCE
This section provides basic maintenance information including battery and
fuse replacement instruction.
Warning
Do not attempt to repair or service your Meter unless you are quali-
ed to do so and have the relevant calibration, performance test, and
service information.
To avoid electrical shock or damage to the Meter, do not get water
inside the case.

16
A. General Service
• Periodicallywipethecasewithadampclothandmilddetergent.Donot
use abrasives or solvents.
•To clean the terminals with cotton bar with detergent, as dirt or moisture
in the terminals can affect readings.
•Turn the Meter to OFF position when it is not in use.
• Take out the battery when not using for a long time.
•Do not store the Meter in a place of humidity, high temperature, explosive,
inammableandstrongmagneticeld.
B. Replacing the Battery
Warning
To avoid false readings, which
could lead to possible electric
shock or personal injury, replace
the battery as soon as the battery
indicator appears.
Make sure that the test leads are
disconnected from the circuit un-
der test before opening the Meter.
To replace the battery: Figure 8
1. Turn off the Meter and remove all connections from the input terminals.
2. Remove the screw from case bottom, and separate the case bottom
from the case top.
3. Remove the battery from the battery compartment.
4.Replacethebatterywithanew9Vbattery(NEDA1604,6F22or006P).
5. Rejoin the case bottom and case top, and reinstall the screw.

17
C. Replacing the Fuse
Warning
To avoid electrical shock or arc blast, or personal injury or damage
to the Meter, use specied fuses ONLY in accordance with the fol-
lowing procedure.
To replace the Meter fuse, follow the below procedure and refer to Figure 8:
1. Turn off the Meter and remove all connections from input terminals.
2. Remove the screw from bottom case, and separate the bottom case
from the top case.
3. Remove the fuse by gently prying one end loose, and then take out the
fuse from its bracket.
4.InstallONLYreplacementfuseswiththeidenticaltypeandspecication
asfollowsandmakesurethefuseisxedrmlyinthebracket.Fuse:
0.3A, 250V, fast type, 5x20mm.
5. Rejoin the bottom case and the top case, and reinstall the screw.
Replacement of the fuses is seldom required. Burning of a fuse always
results from improper operation.

18
12) WARRANTY
This instrument was carefully calibrated and inspected. If any failure oc-
curs under normal use, this product will be repaired according to warranty
conditions and limitations.
WARRANTY
SERIAL Nº MODEL ET-1400
1- The warranty period is 12 (twelve) months and begins on the date
of purchase.
2- It will be repaired free of charge in following cases:
A) Manufacturing defects or damages occurred under normal use
of instrument within the warranty period.
B)Theservicestocorrectthefailurewillbedoneonlyinauthorized
servicecenterorpersonalwillbeallowedtoxthisproduct.
C)IfproductispurchasedthroughaMinipa’sauthorizeddealer.
3- Warranty will be void in case:
A) It has been misused, altered, neglected or damaged by accident
or abnormal conditions of operation or handling.
B)Theinstrumentshowsviolationsbyanonauthorizedrepaircenter.
4- This warranty does not apply to fuses, dry cells, batteries and ac-
cessories as test leads, carrying case, thermocouple, etc.
5- For instrument with software, Minipa assumes responsibility that the
softwarewilloperateinaccordancewithitsfunctionalspecications
for 90 days. Minipa will not guarantee that the software will be error
free or operate without interruption.
6- Minipa assumes no risk for damage in transit or transportation costs.
7- Warranty will be valid only after the registration of this certicate.
Name:
Address: City:
State:    Phone:
SalesVoucherN°:   Date:
SerialN°:
SalesAgentName:

19
A. Warranty Certicate Registration Procedures
The registration can be made by following ways:
-Mail: Sendacopyofwarrantycerticatecorrectlylledtothefollowing
address.
Minipa do Brasil Ltda.
At: Serviço de Atendimento ao Cliente
Av. Carlos Liviero, 59 - Vila Liviero
 CEP:04186-100-SãoPaulo-SP
-Fax: Sendacopyofwarrantycerticatecorrectlylledbyfaxnumber
0xx11-5071-2679.
-e-mail: Scanningthisformandattachtoyoure-mail.Pleasesendto
[email protected].
-Site: Registerthewarrantycerticatebyhttp://www.minipa.com.br/
sac.
IMPORTANT
Thewarrantyconditionsandlimitationswillbevalidonlytothecerticates
correctly registered. In case the purchaser did not register, a sales receipt
showing the date of purchase will be required.
Manualspecicationssubjecttochangewithoutnotice.
Revision: 02
Date of Issue: 08/07/2010