TRUPER MUT-39 Digital Multimeter Instruction Manual

TRUPER MUT-39 Digital Multimeter

INTRODUCTION

• This instructive provides all safety information, operation instructions, specifications and maintenance for the multimeter, which is compact, hand-held and battery operated.
• This instrument performs a.c / d.c. voltage measurements, a.c. / d.c. current, resistance, audible continuity, diode, hFE, frequency, capacitance and temperature.
• The multimeter is 3-1/2 digits, it counts to 1 999 with some automatic range functions.
• It has functions to indicate polarity, data retention, over-range indication and automatic shutdown. Its operation is very simple and it is an ideal instrument.
• The design of the digital multimeter is in accordance with the electronic measuring instruments, with an overvoltage category (CAT III 600 V, CAT II 1 000 V) and pollution degree 2.

WARNING
To avoid possible electric shock or personal injury, and possible damage to the Digital multimeter or the equipment under test, follow the following rules:

• Before using the Digital multimeter inspect the case. Do not use the multimeter if damaged or part of the case has been removed. Look for cracks or missing plastic Double check insulation around the connectors.
• Inspect the test probes for damaged insulation or exposed metal. Check the test probes have continuity.
• Do not apply more than the rated voltage as marked on the multimeter, between the terminals or between any terminal and grounding.
• The rotary switch must be placed in the correct position and there must be no changes while the measurement is being carried out.
• Special care should be taken when the multimeter is working at an effective voltage higher than 60 V in c.c or 30 V RMS a.c., as there is a danger of electric shock.
• Use the appropriate terminals, functions, and range for the measurements.
• Do not use or store the multimeter in high temperatures, humid environments, and strong magnetic fields are present. The performance of the multimeter may deteriorate after it gets wet.
• When using test probes keep fingers behind the fingers guard.
• Disconnect the feeding circuit and discharge all the high-voltage capacitors before testing resistance, continuity, diodes or hFE.
• Replace the battery as soon as the battery indicator appears . With a los battery, the multimeter might produce false readings that can lead to electric shock and personal injury.
• Remove the connection between the test probes and the circuit being tested, and turn the multimeter power off before opening the multimeter case.
• When servicing the multimeter use only spare parts with the same model number or electrical specifications.
• The internal circuit of the multimeter shall not be altered at will to avoid damage to the Digital multimeter and any accident.
• Soft cloth and mild detergent should be used to clean the surface or the multimeter when servicing. No abrasive or solvent should be used to prevent the surface of the Digital multimeter from corrosion, damage, and accident.
• The multimeter is suitable for indoor use.
• Turn the multimeter power off when it is not in use and take out the battery when not using it for a long time. Constantly check the battery as it may leak when it has been used for a long time. Replace the battery immediately if leaking appears. A leaking battery will damage the multimeter.

GENERAL CHARACTERISTICS

ELECTRICAL SYMBOLS

PARTS DESCRIPTION

1. LCD
2. Data retention button
3. Indicator light
4. Rotary switch / function switch
5. Input connector
6. Cover
7. Support
8. Batteries cover

LCD SCREEN

• Selected work cycle
• Grades test Fahrenheit selected
• Grades test Celsius selected
• Transistor test hFE selected
• Continuity test Audible selected
• Diode test selected
•  Auto range mode selected
• Off mode Automatic selected
• Data retention enabled
• DC
• Negative sign
• AC
• Low battery Replace immediately

SPECIFICATIONS

Precision 23 ºC 5 ºC less than 80% HR is guaranteed for a year.

TECHNICAL EXPLANATION

Real RMS

• For the measurement of non- sinusoidal wave signal, the method of measuring the actual RMS is lower than the mean value responsemethod.
• RMS multimeter can measure with precision non-sinusoidal wave, but to test a.c. voltage or current without the a.c. signal input, the multimetershould display a reading between 1 and 50. These deviations in reading are normal.
• When measuring specific ranges, the multimeter is not affected by the measurement pf current and voltage accuracy. The actual RMS requiresan input signal to be measured at a certain level so that the range of the a.c. voltage and current is specified between 2 % and 100 % of the full scale.

Proportion of work

• Proportion of work refers to the high level within a period of time, the work cycle ratio pf a square wave is 50 %, the work ratio is 0,1 which is justified by the 0,1-cycle level. The ratio of the positive pulse durationand the pulse cycle. For example, the pulse within 1 s is the pulse sequence signal period of 1 s duty cycle 0,1.

VOLTAGE DC

(0,8% de rdg + 3 dgts)

20 V| 10 mV
200 V| 100 mV| ****

(1,0% de rdg + 5 dgts)

1 000 V| 1 V

• Input resistance: 5 M in mV range
• Other ranges: 10 M
• Overload protection: 250 V voltage DC or peak value of AC in a 200-mV range. Peak value in other ranges 1 000 V DC or AC

REAL RMS AC VOLTAGE

• Input resistance: 10 M
• Overload protection: 1 000 V DC or AC at peak value Maximum frequency response value: (40 – 1 000) Hz (for standard sine wave and triangle wave)
• Display: True RMS (only as reference, when over 200 Hz in other waves) In the AC 750 V range, AC 380 V and AC 220 V commercial power can be tested, press the “HOLD” key to display the frequency of the commercial power

DC CURRENT

(1,2% of rdg + 8 dgts)

20 mA| 10 µA
200 mA| 100 µA
20 A| 10 mA| (1,2% of rdg + 8 dgts)

Overload protection: 250 V DC or AC at peak value The use of automatic recovery fuses after the external fault disappears, the fuse is returned to normal and the multimeter can be used normally. Maximum voltage drop measurement: 200 mV Maximum input current: 20 A (Test time must be between 10 seconds) Frequency response: 40 – 1 000 Hz (For sine and standard wave and triangle wave) Display: True RMS (Only as reference when over 200 Hz in other waves.

AC CURRENT

• Overload protection: 250 RMS Use the automatic recovery fuse after the external fault disappears, the fuse returns to normal and the multimeter can be used normally Maximum voltage drop measurement: 200 mV
• Maximum input current: 20 a (test time must be between 10 seconds) Frequency response: (40 – 1 000) Hz (For standard sine wave and triangular wave).
• Display: True RMS (only as reference when over 200 Hz in other waves)

RESISTANCE (Auto-fluctuating)

(1,2% de rdg + 5 dgts)

2 kO| 1 O
20 kO| 10 O
200 kO| 100 O
2 MO| 1 kO
20 MO| 10 kO| (1,5% de rdg + 5 dgts)
200 MO| 100 KO| (2,5% de rdg + 5 dgts)

• Overload protection: 250 v DC and AC peak value

NOTE
In range 200 Ω the test probes must be short-circuited and measure the resistance of the conductor and subtract the actual measurement.

ADVERTENCIA
For safety reasons DO NOT ENTER any voltage in the resistance range

CAPACITANCE (Automatic range)

1 000

| (8% de rdg + 5 dgts)

Overload protection: 250 V DC and AC peak value

TEMPERATURE

Overload protection: 250 C DC or AC, at peak value

DIODE AND CONTINUITY

About 1.5 V DC
|

The built-in buzzer will sound

if resistance is lower than 30 O

| ****

Open circuit voltage around 0.5 V DC

• Overload protection: 250 V DC and AC at peak value
• For audible continuity test: When the resistance is between 30 Ω and 70 Ω, it is likely that the buzzer will or will not sound. When the resistance is greater than 70 Ω, the buzzer will not sound.

hFE TRANSISTOR TEST (Connect the adapter)

FREQUENCY (Automatic range)

Overload Protection: 250 V DC and AC at peak value

WORK TEST

Overload protection: 250 V DC and AC at peak value

OPERATION INSTRUCTIONS

VOLTAGE MEASUREMENT

• Insert the black test probe into the “COM” connector, and the red into the “INPUT” connector.
• Set the function switch to the appropriate DC voltage range, connect the test probes through the circuit to be tested. The polarity and the voltage at the point where the red probe is connected will be shown on the LCD.

NOTE

1. If the measured voltage is not known in advance, you should set the function switch to the highest range and then switch to the appropriate range according to the value displayed.
2. In case the LCD shows “OL”, it means it is over the range. Change the function switch to a higher range.

REAL RMS MEASUREMENT OF AC VOLTAGE

• Insert the black test probe into the “COM” connector and the red test probe into the “INPUT” connector.
• Connect the function switch to the appropriate a.c. voltage range, and connect the test leads through the circuit under test.

NOTE

1. If the measured voltage is not known in advance, you should set the function switch to the highest range, then switch to the appropriate range according to the value displayed.
2. In case the LCD shows “OL”, it means it is over the range. Change the function switch to a higher range.

DC CURRENT MEASUREMENT

• Insert the black test probe into the “COM” connector and the red test probe into the “mA” connector (max. 200 mA), or insert the red test probe into the “20 A” connector (max. 20 A).
• Set the function switch to the appropriate DC current range, connect the test probes through the circuit being tested. The current value and polarity of the point where the red test probe was connected will be displayed on the LCD

NOTE

1. If the measured current is not known in advance, you should set the function switch to the highest range; then switch to the appropriate range according to the value displayed.
2. In case the LCD shows “OL”, it means it is over the range. Change the function switch to higher range.
3. When measuring 20 A, continuous measurement of high current may heat up the circuit, affect the accuracy and damage the multimeter.

AC CURRENT MEASUREMENT

• Insert the black test probe into the “COM” test connector and the red test probe into the “mA” connector (maximum 200 mA), or insert the red test probe into the “20 A” connector (maximum 20 A).
• Set the function switch to the appropriate a.c. voltage range; connect the test probes through the circuit being tested.

NOTE

1. If the measured current range is unknown in advance, you should set the function switch to the highest range, then switch to the appropriate range according to the value displayed.
2. In case the LCD shows “OL”, it means it is over range. Change the function switch to a higher range.
3. Pay attention when measuring 20 A. Continuous measurement of high currents can heat up the circuit, affect accuracy and damage the multimeter.

RESISTANCE MEASUREMENT

• Insert the black test probe into the “COM” connector and the red test probe into the “INPUT” connector.
• Set the function switch to the appropriate resistance range. Connect the test probes through the resistance to be measured.

NOTE

1. 1. If the measured resistance value exceeds the maximum value of the selected range, the LCD will display “OL”, therefore, you should set the function switch to a higher range. When the resistance is above 1 M , it may take the multimeter a couple of seconds to stabilize. This is normal for high resistance readings.
2. When the input terminal is in open circuit it is shown as overloaded.
3. When measuring online resistance, confirm that the power supply is off and all capacitors are fully released.

CAPACITANCE MEASUREMENT (Automatic range)

• Insert the red test lead into the “INPUT” terminal and the black test lead into the “COM” connector
• Set the function switch to the 20-mF range, connect the test probes to the capacitor being measured. (NOTE; The polarity of the red test probe is “+”).

NOTE

1. Before measuring, the LCD is probably not at zero; the residual reading gradually decreases and can be ignored.
2. When measuring very large capacitance, if the capacitance is significantly dragged or broken, the LCD will show some instability value.
3. Completely discharge all capacitors before measuring capacitance to avoid any danger.

DIODE AND CONTINUITY TEST

• Insert the black test probe into the “COM” terminal and the red test probe into the “INPUT” connector. (NOTE: The polarity of the red test probe is “+”).
• Place the function switch in the “ ” range, and connect the test probes to the diode to be measured. The reading is an approximation of the positive voltage drop of the diode.
• Connect the test probes to two points on the measured circuit. If the buzzer sounds, the resistance is less than 50 Ω approximately.

hFE MEASUREMENT

• Set the range knob to hFE.
• Verify that the transistor type is NPN or PNP. Insert the transmitter, base and manifold into the appropriate connector.

TEMPERATURE MEASUREMENT

• Place the function switch in the “ºC / ºF” range.
• Insert the black plug (0″-“) of the type K thermocouple probe into the “COM” connector and the red plug (0″+”) into the “INPUT” connector.
• Carefully touch one end of the thermocouple probe to the object to be measured
• Wait a moment and read the reading on the display.
• Press the “SELECT” button to select the “ºC or ºF” mode and the “ºC or ºF” symbol will appear as an indicator.

FREQUENCY AND WORK MEASUREMENT

• Set the function switch to the required “Hz Duty” position
• Plug the black test lead into the “COM” connector and the red test lead into the “INPUT” connector (NOTE: The polarity of the red test lead is positive “+”).
• Read the reading in the display.
• Press the “SELECT” button to choose the “Hz” or “Duty” mode. The “Hz” or “Duty” symbols will appear as indicator.

NOTA
Do not exceed 250 V RMS at the input. The voltage indication may be higher than 100 V RMS, but the reading may be out of specification.

LCD AUTO POWER OFF AND LIGHT ON

• After powering up, the LCD shows “APO”, which means the multimeter is in auto-off mode.
• When the multimeter automatically turns off, press the “HOLD” button to turn the multimeter on.
• Press the “HOLD” button briefly to turn the “HOLD” function off / on. Press the “HOLD” button longer to turn the backlight on / off.
• Press the “HOLD” button on the function rotary switch longer to cancel the auto power off mode. The APO symbols disappear from the screen.

FUSE AND BATTERY CHANGE

If the “ ” sign appears in the display, it indicates that the battery needs to be changed. Remove the screws and open the case from the back. Replace the low battery and insert the new one. The use of automatic recovery fuses, after eliminating the fault, causes the fuse to return to normality and the multimeter can be used normally. No need to change the fuse. The 20 A range has a 20 A / 250 V fast blow fuse. Change the fuse according to the specifications: 20 A, 250 V, FAST, Min. Interrupt Rating 20 000 A, diameter 5 mm x 20 mm. Uses a 6F22 9 V DC carbon-zinc battery (included).

WARNING

To avoid false readings which could lead to electric shock or personal injury, change the battery as soon as the symbol (“ “) appears. To prevent damage or injury, install only replacement fuses with the specified amperage, voltage, and interruption levels.

TO OPEN THE BATTERY COVER
To change the fuse, remove the screws from the support frame, remove the multimeter from its case, remove the rear cover, replace the fuse with a new one of the same sizes. Reassemble the support frame, and reinstall the screws. Disconnect the test probes before opening the rear battery cover.

1. The battery and fuse should only be changed after the test probes are disconnected and the device is switched off.
2. Loosen the screws with a suitable screwdriver and remove the lower part of the housing.
3. The multimeter has a 9 V DC battery. Remove the battery connector tips from the ends of a new battery and reinsert the battery into the housing lid. Fix the tips of the new battery so that they do not get stuck in the bottom of the housing.

TO DISPOSE OFF THE ARTICLE
Dear customer:
In case you wish to dispose of this item, you should keep in mind that many of the components consist of materials with a value that can be recycled. Please do not dispose of it in the household waste. Ask your local authority where it can be recycled.

Warranty Policy

Warranty. Duration: 1 year. Coverage: parts, components, and workmanship against manufacturing or operating defects, except if used under conditions other than normal; when it was not operated in accordance with the instructive; was altered or repaired by personnel not authorized by Truper®. To make the warranty valid, present the product, stamped policy or invoice or receipt or voucher, in the establishment where you bought it or in Corregidora 35, Centro, Cuauhtémoc, CDMX, 06060, where you can also purchase parts, components, consumables and accessories. It includes the costs of transportation of the product that derives from the fulfillment of its service network. . Phone number 800-018-7873. Made in China. Imported by Truper, S.A. de C.V. Parque Industrial 1, Parque Industrial Jilotepec, Jilotepec, Edo. de Méx. C.P. 54257, Phone number 761 782 9100.

• Stamp of the business
• Delivery date
• Truper, S.A. de C.V.
• www.truper.com
• 03-2023

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