Dwyer Instruments MM10 Operating Manual

OPERATING INSTRUCTIONS

SERIES MM10 DIGITAL MULTIMETER

SAFETY INFORMATION

The following safety information must be observed to insure maximum personal safety during the operation of this meter.

Do not use the meter if the meter or test leads look damaged, or if you suspect that the meter is not operating properly.

Never ground yourself when taking electrical measurements. Do not touch exposed metal pipes, outlets, fixtures, etc., which might be a ground potential. Keep your body isolated from ground by using dry clothing, rubber shoes, rubber mats, or any approved insulating material.

Turn off power to the circuit under test before cutting, unsoldering, or breaking the circuit. Small amounts of current can be dangerous.

Use caution when working above DC 60V or AC 30Vrms. Such voltages pose a shock hazard.

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

Measuring voltage which exceeds the limits of the multimeter may damage the meter and expose the operator to a shock hazard. Always recognize the meter voltage limits as stated on the front of the meter.

GENERAL SPECIFICATIONS

Display: 3-1/2 digit liquid crystal display (LCD) with a maximum

reading of 1999.

Polarity: Automatic, positive implied, and (-) for negative polarity

indication.

Overload: (1) or (-1) is displayed on LCD. Low Battery Indication: When "

needs to be replaced.

Sampling Rate: 2.5 times per second. Operating Environment: 0°C~40°C 80% RH. Storage Temperature: -10°C~60°C 0~80% RH with battery

removed from meter.

Power: One 006P 9V standard battery. Battery Life: 150 hours approx. Dimension: 125 mm (H) x 68 mm (W) x 25 mm (D). Weight: 150g approx. including battery. Accessory: Instruction manual, test leads, (1) 9V battery.

SPECIFICATIONS

DCV

Range Resolution Accuracy

2V 1mV 0.5% + 1 dgt

20V 10mV 200V 100mV 600V 1V

1.5% + 1 dgt

" shows on LCD, battery

Input

Impedance

10MΩ

Overload

Protection

DC 600V AC 600V

rms

ACV

Range Resolution Accuracy

2% + 3 dgt

200V 100mV

600V 1V 2.5% + 3 dgt

DCA

Range Resolution Accuracy

2mA 1μA

20mA 10μA

200mA 100μA

10A 10mA 2% + 1 dgt 0.7V

Resistance (Ω)

Range Resolution Accuracy

200Ω 0.1Ω 2% + 2 dgt

2KΩ 1Ω

20KΩ 10Ω

200KΩ 100Ω

2MΩ 1KΩ

20MΩ 10KΩ 2.5% + 2 dgt

Diode Test

Range Resolution

1mV 1mA ≈2.8V

Continuity Test

Range Resolution Sound

Transistor hFE

Range

NPN PNP

LED

Range

LED 1.5-3V 3V ≈25mA

0.1Ω <30Ω <≈2.8V

Measuring

Scope

0-1000 <3.2V IB≈10μA

Measuring

Scope

(40 Hz-

500 Hz)

1.5% + 1 dgt 0.3V

1.5% + 2 dgt

Test

Current

Test

Voltage

Test

Voltage

Input

Impedance

4.5MΩ

Input

Impedance

Open

Voltage

2.8V

0.3V

Open

Voltage

Open

Voltage

Test

Current

Test

Current

Overload

Protection

DC 600V AC 600V

rms

Overload

Protection

0.5A Fuse & Diodes

Overload

Protection

DC/AC

500V

rms

Overload

Protection

DC/AC

500V rms

Overload

Protection

AC/DC

500V rms

Overload

Protection

Overload

Protection

OPERATION

DCV (ACV) Measurement

1. Plug red test lead to "VΩmA" jack, and black test lead to "COM" jack.

2. Turn the function/range selector to "DCV" or "ACV" region. (If measuring an unknown voltage, start from the highest range then adjust to a proper lower range for the best resolution.)

3. Connect the other ends of the test leads to the desired circuit.

4. Get the reading from the LCD.

DCA Measurement

1. Plug red test lead to "VΩmA" jack (if measuring a current between 200mA and 10A, plug to "10A" jack instead), and black test lead to "COM" jack.

2. Turn the function/range selector to "DCA" region. (If measuring an unknown current, start from the highest range then adjust to a proper lower range for the best resolution.)

3. Connect the other ends of the test leads in series with the desired circuit.

4. Get the reading from the LCD.

Resistance Measurement

1. Plug red test lead to "VΩmA" jack, and black test lead to "COM" jack.

2. Turn the function/range selector to "Ω" region (if measuring an unknown resistance, start from the highest range, then adjust to a proper lower range for the best resolution).

3. Connect the other ends of the test leads to the desired resistor.

4. Get the reading from the LCD.

Diode (

1. Plug red test lead to "VΩmA" jack, and black test lead to "COM" jack.

2. Turn the function/range selector to " " range.

3. Connect the other end of red test lead to the positive pole (P) of the diode, and the other end of the black test lead to the negative pole (N).

4. Get the reading from the LCD. (If connection to poles of diode is reverse, LCD would display "I".)

Continuity

1. Plug red test lead to "VΩmA" jack, and black test lead to "COM" jack.

2. Turn the function/range selector to "

3. Connect the other ends of the test leads to the desired resistor.

4. Get the reading from the LCD.

hFE Measurement (for Transistor)

1. Turn the function/range selector to "hFE" (NPN or PNP) region.

2. Insert the transistor pins into "hFE" jack according to E.B.C. sequence.

3. Get the reading from the LCD.

LED Test

1. Turn the function/range selector to "NPN/LED" range.

2. Insert the LED into the measuring jack according to the "+" "" position, and a normal LED will be bright.

3. This function is used only to judge a LED rated 15V~3V for its brightness or not. The reading on LCD means nothing.

) Measurement

Measurement

" range.

MAINTENANCE

WARNING: Remove test leads before changing battery or fuse or performing any servicing.

Battery Replacement

Power is supplied by a 9 volt "transistor" battery (006P DC9V). The " needed. When replacing, remove the two screws from the back of the meter and lift off the rear case. Remove the battery from the case on bottom.

Fuse Replacement

If no current measurements are possible, check for a blown overload protection fuse. Replace the fuse with the original type

0.5A/250V, fast acting type.

" shown on the LCD indicates that replacement is