TRUPER MUT-50A Digital Multimeter Instruction Manual

MUT-50A Digital Multimeter
Instruction Manual

IMPORTANT NOTE: T his product shall not be exposed to liquids dripping or spatter.

INTRODUCTION

This instructive provides all safety information, operation instruction, specifications and maintenance for the Digital multimeter, which is compact, hand-held, and battery operated.
This instrument performs AC / DC voltage, AC / DC Current, Resistance, Audible Continuity, Diode, hFE, Temperature measurements and Frequency measurements, it is a 3 3/4 digits, 3 999 counts auto ranging DMM. It has the functions of polarity indication, data hold, relative data measurements, over range indication. It can be operated easily and is an ideal instrument tool.
The digital multimeter has been designed according to EN61010-1 oncoming electronic measuring instruments with an over voltage category (CAT Ill 600 V) and Pollution degree 2.

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

• Before using the Digital multimeter inspect the case. Do not use the Digital multimeter 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 Digital multimeter, between the terminals or between any terminal and grounding.
• 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 Digital multimeter.
• When the Digital multimeter working at an effective voltage over 60 V in DC or 30 Vrms 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 Digital multimeter in an environment of high temperature, humidity, explosive, inflammable and strong magnetic field.
• The performance of the Digital multimeter 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, diodes.
• Replace the battery as soon as the battery indicator “ ” appears. With a low battery, the Digital multimeter 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 Digital multimeter power off before opening the Digital multimeter case.
• When servicing the Digital multimeter, use only the same model number or identical electrical specifications replacement parts.
• The internal circuit of the Digital multimeter shall not be altered at will to avoid damage of the Digital multimeter and any accident. + Soft cloth and mild detergent should be used to clean the surface of the Digital multimeter when servicing. No abrasive and solvent should be used to prevent the surface of the Digital multimeter from corrosion, damage and accident.
• The Digital multimeter is suitable for indoor use.
• Turn the Digital multimeter 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 Digital multimeter.

GENERAL CHARACTERISTICS

ELECTRICAL SYMBOLS

| DC (Direct Current)| | Continuity test
---|---|---|---
| AC (Alternating Current)| | Centigrade
| DC or AC| | Fahrenheit
| Important safety information Refer to the instructive| AUTO| Auto range
| Dangerous voltage maybe present| | Double insulated
| Earth ground| APO| Auto Power Off
| Low battery| | Relative test
| Fuse| | ‘Data hold
| Diode| |

PANEL DESCRIPTION

1. 3 3/4 digit LCD, with a max. reading of 3999
2. Range Button The Digital multimeter defaults to the auto range mode when you measure the voltage, current or resistance. When the Digital multimeter is in the auto range mode, “AUTO” is displayed. To enter and exit the manual range mode: a. Press “ RANGE” button The Digital multimeter enters the manual range mode and the symbol “AUTO” turns off. b. To exit the manual range mode, press and hold down the “RANGE” button for 2 seconds, the Digital multimeter returns to the auto range mode and the symbol “AUTO” is displayed.
3. “Select.” Button When you measure the current, pressing this button will switch the Digital multimeter between DC function and AC function. When your range on” at “range, pressing this button can select Ohm, capacitance, diode and the continuity functions.
4. ” Hold/#” Button After pressing the button, the present reading is held on the display, meanwhile “ Hold/#” is displayed on the LCD as an indicator. To exit the Hold Mode, press the button again and the indicator “ (J ” will disappear. Pressing the button more then 2 second, backlight turned on, pressing the button more then 2 second again, backlight turned off.
5. “Max/Min” Button After pressing the button will display the maximum and minimum values during the test. The maximum and minimum values are cleared after the changes the test function, or Digital multimeter be off.
6. Relative Button This Digital multimeter will display relative measurements in all functions except Frequency, Ohm, Diode and Audible Continuity, function.
7. Hz% Botton When you measure the Hz%, pressing this button will switch the Digital multimeter between Hz function and duty cycle function. When you measure the ACV, pressing this button will switch the Digital multimeter will show the frequency of the AC voltage.
8. Function/Range Switch This switch can be used to select desired function and range.
9. “A” Jack Plug-in connector for the red test lead for Current (400 mA ~ 10 A) measurements.
10. “COM” Jack Plug-in connector for black (negative) test lead.
11. “INPUT” Jack

Plug-in connector for the red test lead for all measurements except current (2 400 mA) measurements.

SPECIFICATIONS

Accuracy is guarantied for 1 year 23 °C +5 °C less than 80% RH
DC VOLTAGE (Auto ranging)

Input Impedance: 10 MQ
Overload Protection: 600 V DC or 600 AC rms
(200 mV range: 250 V DC / AC rms)
Max. Input voltage: 600 V DC

AC VOLTAGE (Auto ranging)

Input Impedance: 10 MA
Frequency Range: 40Hz ~ 400Hz
Overload Protection: 600 V DC or 600 AC rms
Response: True-RMS
Max. Input voltage: 600 V AC rms
TEMPERATURE

150 °C — 1 370 °C ±(2.5% + 4)
-400E-2 000°F| 1°F| -40 °F — 302 °F:±(2.50/0 + 4) about
302 °F— 2 000 °F±(2.5% + 4)

NOTE: Different temperature sensors are configured in different  temperature test ranges, and normal temperature sensors are provided for standard configuration.
DC CURRENT

Overload Protection: uA= and mA= ranges: F 0.5 A/ 600 V fuse
A= ranges: F 10 A/ 600 V fuse
Max. Input Current for “INPUT” jack is 400 mA
Max. Input Current for “A” jack is10 A
(For measurements > 5 A: duration < 10 seconds, interval > 15 minutes)
Voltage Drop: 400 pA, 40 mA and 6 A ranges: 40 mV
4000 pA, 400 mA and 10 A ranges: 400 mV

AC CURRENT

Overload Protection:
A= and mA= ranges: F 0.5 A/ 600 V fuse
A= ranges: F 10 A/ 600 V fuse
Max. Input Current for “INPUT” jack is 600 mA
Max. Input Current for “A” jack is10 A (For measurements

5 A: duration < 10 seconds, interval > 15
Voltage Drop: 600 pA, 60 mA and 6 A ranges: 60 mV
6 000 pA, 600 mA and 10 A ranges: 600 mV
Frequency Range: 40Hz ~ 400Hz
Response: True-RMS
RESISTANCE (Auto Ranging)

Open Circuit Voltage: about 1.0 V
Overload Protection: 250 V DC / AC rms
DIODE AND CONTINUITY

voltage: about 3.2 V
| The built-in buzzer will sound if the resistance is less than about 300| Open circuit voltage: about 1.0 V

Overload Protection: 250 V DC / AC rms
CAPACITANCE

FREQUENCE

OPERATION INSTRUCTION

MEASURING VOLTAGE

1. Connect the black test lead to the “COM” jack and the red to the “INPUT” jack.
2. Set the function switch to V~or V= range. Select auto range or manual range with the “RANGE” button.
3. In manual range, if the voltage magnitude to be measured is unknown beforehand, select the highest range.
4. Connect the test leads across the source or load to be measured. 5. Read LCD display. The polarity of the red lead connection will be indicated when making a DC measurement.

Note:
a. In small range, the Digital multimeter 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. In manual range mode, when the Digital multimeter shows the over range symbol “OL”, a higher range must to be selected.
c. To avoid damage to the Digital multimeter, don’t measure a voltage which exceeds 400 V DC (for DC voltage measurement) or 400 V AC (for AC voltage measurement).

MEASURING CURRENT

1. Connect the black test lead to the “COM” jack. If the current to be measured is less than 400 mA, connect the red test lead to the “INPUT” jack. If the current is between 600 mA and 10 A, connect the red test lead to the “10 A” jack instead.
2. Set the range switch to desired yA =, mA=or A=range. If the current magnitude to be measured is not known beforehand, set the ranges switch to the highest range position and then reduce it range by range until satisfactory resolution is obtained.
3. Select DC current measurement or AC current measurement with the “Select” Button.
4. Select auto range or manual range with the “Range” button. In manual range, if the current magnitude to be measured is not known beforehand, select the highest range.
5. Connect test leads in series with the circuit to be measured.
6. Read the reading on the display. For DC current measurement, polarity of the red test lead connection will be indicated as well.
   Note: When the display shows the over range symbol “OL”, a higher range must be selected.

MEASURE RESISTANCE

1. Connect the black test lead to the “COM” jack and the red to the “INPUT” jack (Note: The polarity of the red test lead is positive “+”).
2. Set the range switch to” ” position
3. Set the “Select” button to” “range
4. Select auto range or manual range with the “Range” button. In manual range, if the current magnitude to be measured is not known beforehand, select the highest range.
5. Connect the test leads across the load to be measured.
6. Read the reading on the display.

Note:

a. For resistance measurements > 1 MQ, the Digital multimeter 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.
CONTINUITY TEST

1. Connect the black test lead to the “COM” jack and the red to the “INPUT” jack (Note: The polarity of the red test lead is positive “+”).
2. Set the range switch to“ ” position
3. Press the “Select” Button to select continuity measurement mode, the symbol “s)” 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 30 Q, the built-in buzzer will sound.

DIODE TEST

1. Connect the black test lead to the “COM” jack and the red to the “INPUT” jack (Note: The polarity of the red test lead is positive “+”).
2. Set the range switch to “ ” position.
3. Press the “Select” Button to select diode test 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 Digital multimeter will show the approximate forward voltage of the diode. If the connections are reversed, “OL” will be shown on the display.

MEASURING CAPACITANCE

1. Connect the black test lead to the COM jack and the red to the “INPUT” jack.
2. Set the range switch to eh ” position
3. Press the “Select” Button to select capacitance measurement mode, and the symbol “ ” will appear as an indicator.
4. 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 100 uF, it needs at least 10 seconds to make readings stable.

MEASURING TEMPERATURE

1. Set the range switch to “ °C ” or “°F” range.
2. Insert the black (or “-“) plug of the K type thermocouple to the “COM” jack, and the red( or “+”) plug to the “INPUT” jack.
3. Carefully touch the end of the thermocouple to the object to be measured.
4. Wait a moment, read the reading on the LCD.

MEASURING FREQUENCY OR DUTY CYCLE

1. Connect the black test lead to the COM jack and the red to the“INPUT” jack.
2. Set the range switch to “Hz %” range.
3. Press the “Hz/Duty” Button to select “Hz” or “duty cycle” (%) mode.
4. Connect test leads across the source or load under measurement.
   NOTE: The input voltage should be between 200 mV and 10 V rms AC. If the voltage is more than 10 V rms, reading may be out of the accuracy range.

AUTO POWER OFF

If you don’t operate the Digital multimeter for about 15 minutes, it will turn off automatically. To turn on it again, just press any button.
In the power off state, press and hold “Select” button to Rotary range switch, you can cancel the auto power off function, “APO” symbol disappear from the LCD.

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 (1.5 V DC x 3 AAA size, Carbon-Zinc or equivalent).

FUSE REPLACEMENT

Fuse rarely needs replacement and is blown almost always as a result of operator’s error. This Digital multimeter uses a fuse: F1: 500 mA/ 600 V and F2:10 A/ 600 V fast action. To replace the fuses, open the meter back cover, replace the damaged fuse with a new fuse of the specified ratings. Re-install the battery cover and lock this cover.
MUT-50A 100361
This product is guaranteed for 1 year. To make the warranty valid or purchase parts and components you must present the product in Corregidor 22, Col. Centro, Alc. Cuauhtémoc, CDMX C.P. 06060 or at the establishment where you purchased it, or at any Truper® Service Center listed in the annex to the warranty policy and/or in www.truper.com Transportation costs resulting from compliance of this warranty will be covered by Truper® For questions or comments, call 800-690-6990. Made in China. Imported by Truper S.A. de C.V. Parque Industrial 1, Jilotepec, Edo.
Stamp of the business

Truper, S.A. de C.V.
www.truper.com
03-2021

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