MUL-282 - Multimeter Steren - Free user manual and instructions

Product Type	Digital Multimeter with Auto Range Voltage Detector
Brand	Steren
Model	MUL-282
Power Supply	3V (2 x AAA batteries)
DC Voltage Range	200 mV - 500 V
AC Voltage Range	200 mV - 500 V
DC Current Range	200 μA - 10 A
AC Current Range	200 μA - 10 A
Resistance Range	200 Ω - 20 MΩ
Temperature Range	-20°C to 750°C (-4°F to 1832°F)
Diode Test	Yes, approximate voltage drop
Continuity Test	Yes, audible alarm below ~70 Ω
Non-Contact Voltage Detector	Yes (NCV), visual and audible alarm
Data Hold	Yes
Auto Range	Yes
Overload Protection	Fuse: F200mA/250V (μA/mA) and 10A unfused range
Fuse Specifications	Fuse 1: 10ABS1362, Fuse 2: 200mABS1362
Operating Temperature	0°C to 40°C
Storage Temperature	-10°C to 60°C
Warranty	1 year

Frequently Asked Questions - MUL-282 Steren

How do I measure DC voltage with the MUL-282?

Turn the knob to V= (DC voltage). Insert the black lead into COM and the red lead into VΩmA°C. Touch the probes to the circuit (red to positive, black to negative). Read the value on the display. The meter autoranges, so no need to select range.

How do I measure AC voltage?

Turn the knob to V~ (AC voltage). Insert the black lead into COM and the red lead into VΩmA°C. Touch the probes across the circuit. The display shows the RMS voltage. Ensure voltage does not exceed 600V.

How do I measure current?

Turn the knob to A, mA, or μA range. Press SEL to choose AC or DC. Insert the black lead into COM. For currents <200mA use the μA/mA jack; for 200mA-10A use the 10A jack. Break the circuit and connect the meter in series. Reapply power and read the current.

How do I test continuity?

Turn the knob to the Ω/continuity/diode position. Press SEL until the continuity symbol (sound wave) appears. Insert leads into COM and VΩmA°C. Touch the probes to the circuit. If resistance is below about 70Ω, the meter will beep continuously.

How do I test a diode?

Turn the knob to the Ω/continuity/diode position. Press SEL until the diode symbol appears. Insert the black lead into COM and the red lead into VΩmA°C. Connect the red probe to the anode and black to the cathode. The display shows the forward voltage drop. A good diode typically reads 0.5-0.8V. An open diode shows OL.

How do I measure temperature?

Turn the knob to °C/°F. Press SEL to choose unit. Insert the black temperature probe adapter into COM and the red into VΩmA°C. Touch the probe tip to the object and wait for a stable reading. Do not measure voltages above 36V during temperature measurement.

How do I use the non-contact voltage detector?

Turn the knob to NCV. Bring the top of the meter close to a wire, outlet, or component. If AC voltage is present, the indicator LED will flash and the meter will beep. Insulation thickness may affect detection. Interference from other sources can cause false alarms.

How do I replace the batteries?

Turn off the meter and remove the test leads. Pull up the support stand, remove the screw and cover. Replace the two AAA batteries ensuring correct polarity. Replace the cover and screw. Battery life is approximately 0.1mW/h.

How do I replace the fuses?

Turn off the meter and disconnect all leads. Remove the rubber cover and the screws on the back. Open the case. Replace the blown fuse(s) with the same type: Fuse 1: 10ABS1362 (for 10A range) and Fuse 2: 200mABS1362 (for μA/mA range). Reassemble the case and screws.

What do the symbols on the display mean?

Common symbols: OL = overload, NCV = non-contact voltage detected, low battery icon, auto-range (A), diode symbol, continuity (sound wave), data hold (H), MAX = maximum reading, °C/°F for temperature, kΩ/MΩ/Ω for resistance, μA/mA/A/V/mV for current/voltage, AC/DC indicators.

USER MANUAL MUL-282 Steren

Diagram of a mechanical component with a red curved arrow indicating motion or force, no text or symbols present

Two batteries with green and gray casing, one white and one gray, shown in open position (no text or symbols)

Line drawing of a mechanical device with no visible text or symbols

DC = Corriente Directa

AC = Corriente Alterna

Prueba de diodos

Simple electrical circuit diagram with battery, two black and red probes, and a plus sign (no text or symbols)

Pure electrical circuit lines without any symbols

Illustration of a multimeter with black, red, and blue probes connected by a coiled cable (no text or symbols)

Line drawing of a device with a separate electrical outlet symbol (no text or labels)

MANTENIMIENTO

Technical line drawing of a rectangular device with mounting points and internal components (no text or symbols)

Line drawing of a mechanical component with diagonal lines and base (no text or symbols)

STEREN PRODUCTO EMPACADO S.A. DE C.V.

CENTRO DE ATENCIÓN

A CLIENTES

01 800 500 9000

MUL-282

Digital Multimeter With Auto Range Voltage Detector

MUL-282

Before to use the product, please read carefully this manual to avoid any malfunction. The info in this manual is shown as reference. Due to updates can exist differences. Consult our website www.steren.com to obtain the most actual version of this manual.

CAUTIONS

• The inappropriate use of this multimeter may cause damages, shock hazard or severe injuries.
  • Always remove the test cables before to replace the batteries or fuse.
• Check the status of the test cables or the meter before to use it.
• Don’t measure voltage that exceed 1000V over fisic ground; may be dangerous.
• Be careful when you take measures over 30 VCA RMS o 60V DC; this voltages may cause shock hazard.

• Always discharge the capacitors and cut the power of the device before to make diode test, resistance or continuity.

• To avoid damages in the meter, do not exceed the maximum limits of the input values that is shown in the specifications.

• Remove the batteries, in case the device won’t be used for long periods of time
• This product is NOT a toy; keep it away from children.
• This device cannot be used by people with different abilities, unless they have preparation and supervision.

INDEX

DESCRIPTION 29

Parts 29

Selector knob 31

Symbols in the screen 32

BATTERIES REPLACEMENT 33

HOW TO USE 34

Voltage measuring 34

Current measurement 35

Diode test 37

Continuity testing 38

Temperature measuring 39

No-contact voltage detector (NVC) 40

MAINTENANCE 41

Fuse replacement 41

MEASURING SPECIFICATIONS 42

Direct current voltage 42

Alternating current voltage 43

DC Current 43

AC Current 44

Resistance 44

Diode and continuity 45

Temperature 45

DESCRIPTION

Parts

Selector knob

OFF	Off
V=	Direct current voltage (DC)
V~	Alternating current voltage (AC)
NCV	Non-contact voltage detector
	Diode testContinuity testResistance measuring
μA≈	Direct current (DC) and Alternating Current (AC) in micro amperes
mA≈	Direct current (DC) y Alternating Current (AC) in mili amperes
A≈	DC and AC in amperes
°C/°F	Temperature in Centigrade gradesTemperature in Fahrenheit grades

Symbols in the screen

This indicate overload

1. Non-contact voltage detector
2. Low battery
3. Auto-range activated
4. Diode
5. Continuity
6. Data hold activated

7. Maximum measuring

8. Centigrades/Fahrenheit grades

9. kilo ohm / mega ohm / ohm
10. micro ampere / mili ampere / ampere /volt /mili volt/ ampere
11. Alternating current
12. Direct current

BATTERIES REMPLACEMENT

Diagram of a mechanical component with a red curved arrow indicating motion or force, no text or symbols present

Pull up the support. Remove the screw and the cover

Remove the compartment. Place the batteries.

Two stacked batteries with green and gray casing, one white and one gray, shown in open position (no text or symbols)

Ensure that the polarity is right

Line drawing of a mechanical device with a handle and internal components (no text or symbols)

Set the compartment again. Down the cover and screw it again.

HOW TO USE

Voltage measuring

The high voltage circuits, such as AC and DC, are very dangerous; they must be measured with cautions.

To avoid shock hazard or damage in the meter, performs measures higher than 600 V DC.

1. Turn the knob to select the voltage type that you want to measure:

V --- DC

V \~ AC

1. Insert the black connector into the COM terminal; insert the red connector into AmA to terminal.

1. Touch with the black tip in the negative side of the circuit; touch with the red tip in the positive side of the circuit.

Current measurement

Never try to measure current when the voltage between the open circuit and the ground is higher than 600V.

Never place the test cables in parallel with a circuit or component when they are connected to the terminals.

1. Remove the power supply and discharge the capacitors of the circuit.
2. Adjust the knob to current measuring range: A / mA / A .
3. Press the SEL button to choose the current type:

DC

AC

1. Insert the black connector into the COM terminal. To make a measuring less than 200 mA insert the red connector into A A terminal; to measure between 200 mA and 10 A insert the red connector into A terminal.

1. Open the circuit. Connect the tips into the circuit so that the current flows through the multimeter. (serial connection)

2. Activate the power in the circuit again.

Diode test

Be sure that the circuits have not energy and the capacitors are completely discharged to avoid hazard shock or damages in the equipment.

1. Set the knob in the position
2. Press SEL until the ➕ icon appears in the top of the screen.
3. Insert the black connector into the COM terminal; insert the red connector into A_mA VQ°C F terminal.
4. Connect the tips to the semi-conductor component: the red to anode and the black to cathode.

Simple electrical circuit diagram with battery, two black and red probes, and a plus sign (no text or symbols)

Continuity testing

Be sure that the circuits have not energy and the capacitors are completely discharged to avoid hazard shock or damages in the equipment.

1. Set the knob in the ⚙Ω position
2. Press SEL until the icon appears in the top of the screen.
3. Insert the black connector into the COM terminal; insert the red connector into terminal.
4. Touch with the tips the circuit or wire that you want to check. The resistance value will shown in the screen, if the resistance is lower to 70 ± 30 , the signal will be audible.

Two black and red test probes with a switch, no text or symbols present

Temperature measuring

To avoid shock hazard, do not measuring temperature if the input voltage exceed 36 V DC or 36 V AC RMS.

1. Set the knob in the °C / °F position

2. Press the SEL button to choose the unit measure:

°C = Centigrade

°F = Fahrenheit

1. Insert the black temperature adapter into COM terminal, insert the red temperature adapter into A_mA V^^ terminal

2. Touch with the adapter the piece where you want to measure the temperature; keep the contact until the measure is stabilized.

Illustration of a multimeter with three probes (black, red, blue) connected by a coiled wire, no text or symbols present.

No-contact voltage detector (NCV)

1. Set the knob in the NCV position.

2. Near the top of the multimeter to the equipment or component that you want to check (wire, contact, socket).

In case of voltage detection, the indicator LED will flash and the equipment will emit an audible signal

The circuit design, the insulation thickness and others variables may cause interference in the detection

The interference sources, as lanterns, engines may cause wrong detection

Line drawing of a device with a separate electrical outlet symbol (no text or labels)

MAINTENANCE

Fuse replacement

To avoid a shock hazard or damages to yourself or to multimeter, use only fuses with the same specifications (Fuse 1 10ABS1362, Fuse 2 200mABS1362).

1) Turn off the multimeter and disconnect the test cables.
2) Remove the rubber cover.

Technical line drawing of a rectangular device with mounting points and internal components (no text or symbols)

Simple line drawing of a mechanical component or tool (no text or symbols)

3) Remove the screws.
4) Remove the cover.

5) Replace the fuses.

Fuse 1 Fuse

6) Set the screws and the cover again.

MEASURING SPECIFICATIONS

Direct current voltage

Range Resolution Accuracy
200mV 100μV ±(0.5% reading + 2 digits)
2V 1mV ±(0.5% reading+ 3 digits)
20V 10mV	±(0.8% reading+ 3 digits)
200V 100mV
500V 1V ±(0.8% reading+ 5 digits)

Overload protection: Range from 200 mV to 250 V DC or 250 V AC RMS

Other ranges: from 600V to 600V DC or AC RMS

Alternating current voltage

Range Resolution Accuracy
2 V 1mV
20V 10mV
200V 0.1V
500V 1V
600V 1V

Overload protection: 600 V DC or 600 V AC RMS

Other ranges: 40 Hz \~ 400Hz

DC Current

Range Resolution Accuracy
200μA 0.1μA
2mA 1μA
20mA 10μA
200mA 100μA ±(20% reading + 5 digits)
2A 1mA
10A 10mA

Overload protection: Fuse F200mA / 250V

Range without fuse 10 A

AC Current

Range Resolution Accuracy
200μA 0.1μA
2mA 1μA
20mA 10μA
200mA 100μA ±(25% reading+ 5 digits)
2A 1mA
10A 10mA

Overload protection: F200mA / 250V fuse

Range without fuse 10 A

Resistance

Range Resolution Accuracy
200Ω 0.1Ω		±(1.0% reading+ 2 digits)
2kΩ 0.001kΩ
20kΩ 0.01kΩ
200kΩ 0.1kΩ
2MΩ 0.001MkΩ
20MΩ 0.01MΩ	±(1.0% reading+ 2 digits)

Overload protection: 250 V DC or 250 V AC RMS

Maximum tension in open circuit: <3.2V

Diode and continuity

Range Function
	Diode approx voltage
	The function of the alarm will sound if the resistance is lower than 70Ω ± 30Ω

Temperature

Range Resolution Accuracy
-20°C~750°C 1°C
-4°F ~ 1832°F 1°F

Overload protection: 250V DC or 250 V AC RMS

SPECIFICATIONS

Input: 3V --- (2 x AAA)

DC voltage range: 200 mV - 500 V

AC voltage range: 200 mV - 500 V

Resistance: 200-20 MΩ

AC Current range: 200 uA - 10 A

DC Current range: 200 uA - 10 A

Temperature range: -20 to 750 °C

Operating temperature: 0-40 °C

Storage temperature: -10 to 60 °C

Consumption: 0.1 mW / h

Standby power consumption: Not applicable

Specifications may change without notice

STEREN

Product: Digital Multi Meter With Auto Range Voltage Detector

Number part: MUL-282

Brand: Steren

This Steren product is warranted under normal usage against defects in workmanship and materials to the original purchaser for one year from the date of purchase.

CONDITIONS

1. This warranty card with all the required information, invoice or purchase ticket, product box or package, and product, must be presented when warranty service is required.
2. If the product is in the warranty time, the company will repair it free of charge.
3. The repairing time will not exceed 30 natural days, from the day the claim was received.
4. Steren sell parts, components, consumables and accessories to customer, as well as warranty service, at any of the addresses mentioned later.

THIS WARRANTY IS VOID IN THE NEXT CASES:

If the product has been damaged by an accident, acts of God, mishandling, leaky batteries, failure to follow enclosed instructions, improper repair by unauthorized personnel, improper safe keeping, among others.

a) The consumer can also claim the warranty service in the purchase establishment.
b) If you lose the warranty card, we can reissue it, if you show the invoice or purchase ticket.

RETAILER INFORMATION

Name of the retailer ____

Address

Product

Brand

Serial number ____

Date of delivery ____

CUSTOM SERVICE CENTER

01 800 500 9000