Elenco Digital Multimeter User Manual

ELENCO

®

150 Carpenter Ave • Wheeling, IL 60090

[phone] • Website: www.elenco.com

e-mail: [e-mail]

OPERATOR’S

INSTRUCTION MANUAL

M-2625A

AUTO RANGING

DIGITAL MULTIMETER

with Temperature Probe

Copyright © 2012 ELENCO

®

WARRANTY POLICY

Your digital multimeter has been tested and
conforms to our rigid requirements on
performance and durability. It is guaranteed to be
free of defects in workmanship, materials and
construction for a period of 2 years. If this
product should fail during normal use within the
first 3 months from the date of purchase,
ELENCO

®

will repair or replace the unit at no
cost. For the remainder of the warranty period, a
nominal service charge is required to cover
shipping and handling.

When returning merchandise for repair, please
include proof of purchase, a brief letter of explanation
of problem and sufficient packing material. Before
returning any merchandise, please call our service
department at [phone] to obtain a return
authorization number (RA).

ELENCO®• Service Department

150 Carpenter Avenue • Wheeling, IL 60090

Contents

1. Introduction 3

2. Safety Information 3

3. Safety Symbols 5

4. Front Plate of the Meter 5
Input Terminal 6
Function Rotary Switch 7
Function Press Button 8
LCD Display 10

5. Power On Option 11

6. Auto Power Off 11

7. Measurement Range 11

8. Making Measurements 12
Preparation 12
Measuring Voltage 12

Measuring DC Voltage 13
Measuring AC Voltage 14

Measuring Current 16

Measuring DC Current 17
Measuring AC Current 19

Measuring Resistance 21
Testing Diodes 23
Testing for Continuity 24
Measuring Capacitance 25
Measuring Frequency 27
Measuring Duty Cycle 28
Measuring Temperature 29

9. Maintenance 31

General Maintenance 31
Replacing the Batteries 31
Replacing the Fuses 32

10.General Specifications 33

11.Detailed Accuracy Specifications 33

-2-

Table 12. Capacitance Detailed Accuracy Specifications

Table 13. Diode Detailed Accuracy Specifications

Overload protection: 250V DC/AC rms

Table 14. Frequency & Duty Cycle Detailed Accuracy Specifications

Table 15. Temperature Detailed Accuracy Specifications

Overload protection: 250V DC/AC rms

-35-

Range Resolution Accuracy Note

40nF 10pF ±(3.5% rdg + 10)

Overload protection:

250V DC/AC rms

400nF 100pF

±(3.0% rdg + 5)

4μF 1nF

40μF 10nF

400μF 100nF

±(20% rdg + 5)

4000μF 1μF

Range Description Note

Display reads approximate
forward voltage of diode

Test current: 1mA ±0.6mA
Test voltage: approx. 2.8V

Range Resolution Accuracy Sensitivity Note

9.999Hz

-

10MHz

0.001Hz

-

10kHz

±(0.1% rdg + 5)

<100kHz:

1.5V rms

>100kHz:

5V rms

Overload

protection:

250V rms

Duty cycle:
10Hz-1kHz

0.1% - 99.9% 0.1% ±(2.5% rdg + 5) 1.5V rms

Range Accuracy Note

32°F - 104°F
(0°C – 40°C)

±5°F; ±3°C (using built-in

temperature sensor)

±5°F (room temperature)

–50°C – 200°C

±(1.5% rdg + 3)

–58°F – 392°F

±(1.5% rdg + 5)

200°C – 700°C

±(2.0% rdg + 3)

392°F – 1292°F

±(2.0% rdg + 5)

Table 8. AC Voltage Detailed Accuracy Specifications

Table 9. DC Current Detailed Accuracy Specifications

Table 10. AC Current Detailed Accuracy Specifications

Table 11. Resistance Detailed Accuracy Specifications

-34-

1. Introduction

This series LCD auto ranging and auto power-off digital multimeter
is a portable, compact, 3¾ digit multimeter. It is ideally suited for
field, lab, shop, car, and home.

CAUTION: Read, understand and follow all Safety Rules and
Operating Instructions in this manual before using this product.

2. Safety Information

Use the meter only as specified in this manual. Otherwise, the
protection provided by the meter may be impaired. Refer to safety
information in Table 1.

Table 1. Safety Information

Warning

To avoid possible electric shock or personal injury, follow these
guidelines:

• Do not use the meter if it is damaged. Before you use the meter,
inspect the case. Look for cracks or missing plastic. Pay particular
attention to the insulation surrounding the connectors.

• Inspect the test leads for damaged insulation or exposed metal.
Check the test leads for continuity. Replace damaged test leads
before you use the meter.

• The RESPONSIBLE BODY shall be made aware that, if the
equipment is used in a manner not specified by the manufacturer,
the protection provided by the equipment may be impaired.

• Do not use the meter if it operates abnormally. Protection may be
impaired. When in doubt, have the meter serviced.

• Do not operate the meter around explosive gas, vapor, or dust.

• Do not apply more than the rated voltage, as marked on the meter,
between terminals or between any terminal and earth ground.

• Before use, verify the meter’s operation by measuring a known
voltage.

• When measuring current, turn off circuit power before connecting
the meter in the circuit. Remember to place the meter in series with
the circuit.

-3-

!

Range Resolution Accuracy Note

400mV 0.1mV ±(1.5% rdg + 8) Frequency response:

50Hz - 400Hz
Input resistance: 10MΩ
Overload protection:

600VDC or 600VAC rms

4V 1mV

±(1.0% rdg + 5)

40V 10mV
400V 100mV
600V 1V ±(1.5% rdg + 5)

Range Resolution Accuracy Note

400μA 0.1μA

±(2.0% rdg + 5)

Overload protection:
Fast fuse 0.5A/250V and
fast fuse 10A/250V.

10A for 15sec. maximum

Input voltage drop: <

0.4V

4000μA 1μA

40mA 10μA

±(1.5% rdg + 5)

400mA 100μA

4A 1mA

±(2.0% rdg + 5)

10A 10mA

Range Resolution Accuracy Note

400μA 0.1μA

±(2.5% rdg + 3)

Overload protection:
Fast fuse 0.5A/250V and
fast fuse 10A/250V.

10A for 15sec. maximum
Input voltage drop: <

0.4V

Frequency response:
50Hz - 400Hz

4000μA 1μA

40mA 10μA

±(2.0% rdg + 5)

400mA 100μA

4A 1mA

±(2.5% rdg + 5)

10A 10mA

Range Resolution Accuracy Note

400Ω 100mΩ

±(1.0% rdg + 5)

Overload protection:

250V DC/AC rms

4kΩ 1Ω

40kΩ 10Ω

400kΩ 100Ω

4MΩ 1kΩ

±(2.0% rdg + 5)

40MΩ 10kΩ

Table 1. Safety Information (continued)

Warning

• When servicing the meter, use only specified replacement parts.

• Use caution when working above 30VAC rms, 42V peak, or 60VDC.
Such voltages pose a shock hazard.

• The finger or any part of your body shall not extend beyond the
barrier of the test probe when measuring.

• Avoid working alone.

• When using the probes, keep your fingers behind the finger guards
on the probes.

• Connect the common test lead before you connect the live test lead.
When you disconnect test leads, disconnect the live test lead first.

• Remove test leads from the meter with the battery door or portions
of the cover removed or loosened.

• To avoid false readings which could lead to possible electric shock
or personal injury, replace the batteries as soon as the low battery
indicator ( ) appears.

• Use only two “AA” batteries (NEDA 1604, IEC 6F22, or equivalent),
properly installed in the meter case, to power the meter.

• To avoid the potential for fire or electrical shock, do not connect the
thermocouples to electrically live circuits.

Caution

To avoid possible damage to the meter or to the equipment under test,
follow these guidelines:

• Disconnect circuit power and discharge all high-voltage capacitors
before testing resistance, continuity, diodes, or capacitance.

• Use the proper terminals, function, and range for your
measurements.

• Before measuring current, check the meter’s fuses and turn power
OFF to the circuit before connecting the meter to the circuit.

-4-

10. General Specifications

Display: 3¾ digit LCD with a maximum reading of 4000.
Range Control: Auto range or manual range control.
Polarity: Automatic negative polarity indication.
Zero Adjustment: Automatic
Overrange Indication: Only the “OL” display.
Low Battery: The symbol “ ” is displayed when the battery

voltage is below approximately 2.4V.
Auto Power Off: 10 minutes after stopping the switch or no key-

input, the meter automatically enters the power off mode.
Safety Standards: ETL / h EMC/LVD. The meter is up to the

standards of IEC1010 Pollution Degree 2; overvoltage category III
Operating Environment: Temperature 32° to 104°F (0° to 40°C),

humidity <80% RH.
Storage Environment: Temperature –4° to 140°F (–20° to 60°C),

humidity <90% RH.

Power: Two 1.5V “AA” batteries.
Dimensions: 6 1/2” [165mm] (H) x 3 17/64” [83mm] (W) x

1 29/64” [37mm] (D)

Weight: Approximately 9.2oz. / 260g. (including batteries)

11. Detailed Accuracy Specifications

Accuracies are ± (% of reading + number in last digit) at 73°F
±41°F/23°C ±5°C, <75% RH.

The detailed accuracy specifications are shown in Tables 7 to 18.

Table 7. DC Voltage Detailed Accuracy Specifications

-33-

!

+ –

Range Resolution Accuracy Note

400mV 0.1mV

±(0.5% rdg + 5)

Input resistance: 10MΩ

Overload protection:
600VDC or 600VAC rms.

4V 1mV

40V 10mV
400V 100mV
600V 1V ±(0.8% rdg + 5)

+ –

Replacing the Fuses

Warning

To avoid electrical shock or damage to the meter, only use
replacement fuses ∅5x20 0.5A/250V FAST or ∅6x25 10A/250V FAST.

1. Turn the Function Rotary Switch to the OFF position and remove
the test leads from the terminals. Remove the battery cover as
shown in Figure 18. Referring to Figure 19, examine or replace
the meter’s fuses as follows:

2. Using a screwdriver, unscrew the three screws on the back case.
Remove it by lifting it up from the bottom and carefully separating
the top part from the two mounting tabs.

3. Remove either fuse by gently prying one end loose, then sliding
the fuse out of its bracket.

4. Install ONLY the specified replacement fuses with the amperage,
voltage, and speed ratings:

∅5x20 0.5A/250V FAST or ∅6x25 10A/250V FAST.

5. Reinstall the back case. Secure the back case by turning the
screws clockwise.

Figure 19. Fuse Replacement

-32-

3. Safety Symbols

Symbols used on the meter and in this manual are explained in
Table 2.

Table 2. International Electrical and Relative Symbols

4. Front Plate of Meter

Figure 1. Front plate of the meter

-5-

~

AC (Alternating Current) Important Information

DC (Direct Current)

Caution, risk of electric shock

h

European Safety Standard Earth Ground

Double Insulated Low Battery Indicator

The symbol indicating separate
collection for electrical and
electronic equipment.

U.S. Safety Standard

!

LCD Display

Function Press
Button

Function
Rotary Switch

Input Terminal

!

Screws

Elenco®Fuse Part #

0.5A/250V ∅5x20
fast blow 533004
10A/250V ∅6x25
fast blow 531101

+ –

Screw

Input Terminal

About terminal function refer to Table 3 and Figure 2.

Figure 2. Input Terminal

Table 3. Input Terminal

-6-

9. Maintenance

General Maintenance

Periodically wipe the case with a damp cloth and mild detergent.
Do not use abrasives or solvents. Dirt or moisture in the terminals
can affect readings. Clean the terminals as follows:

1. Turn the meter off and remove all test leads.

2. Shake out any dirt that may be in the terminals.

3. Soak a new swab with alcohol. Work the swab around each
terminal.

Replacing the Batteries

Replace the batteries with two “AA” batteries (R6P) or equivalent.

Warning

To avoid false readings, which could lead to possible electric
shock or personal injury, replace the batteries as soon as
the low battery indicator ( ) appears.

Replace the batteries as follows (refer to Figure 18):

1. Turn the Function Rotary Switch to the OFF position and remove
the test leads from the terminals.

2. Remove the battery cover by using a screwdriver to turn the
battery door screw counterclockwise.

3.

Replace the batteries. Turn the screw clockwise to secure the cover.

Figure 18. Battery Replacement

-31-

Terminal Function Description

V/Ω /Hz

/ / )/°F/°C

Volts, ohm, diode, frequency, DUTY, temperature and
capacitance measurement, and testing for continuity terminal

μA/mA

Microampere current, milliampere current measurement terminal

COM

Common terminal for all measurements

10A

Ampere current measurement terminal

!

Screw

Battery: Two R6P
(AA) or equivalent

+ –