Klein Tools MM420 Manuel utilisateur

INSTRUCTION MANUAL

ENGLISH

• LEAD ALERT

PROTECTION

• DATA HOLD

• AUDIBLE

CONTINUITY

• MIN / MAX

• TEMPERATURE

• DIODE TEST

• CAPACITANCE

FRANÇAIS pg. 33

ESPAÑOL pg. 19

Auto-Ranging

Digital Multimeter

600V

10A

50M

CAT III

600V

5000573

MM420

True RMSTrue RMS

Measurement

Technology

GENERAL SPECIFICATIONS

Klein Tools MM420 is an auto-ranging, true root mean squared

multimeter that measures AC/DC voltage, AC/DC current, and resistance.

It can also measure temperature, capacitance, frequency, duty-cycle,

and test diodes and continuity.

• Environment:

Indoor. DO NOT expose to moisture, rain, or snow.

• Operating Altitude: 6562 ft. (2000m)

• Relative Humidity: <80% non-condensing

• Operating Temp: 32°F to 104°F (0°C to 40°C)

• Storage Temp: 14°F to 140°F (-10°C to 60°C)

• Accuracy: Values stated at 65°F to 83°F (18°C to 28°C)

• Temp Coefcient: 0.1 x (Quoted Accuracy) per °C above 28°C

or below 18°C, corrections are required when ambient working

temp is outside of Accuracy Temp range

• Dimensions: 6.41" × 3.13" × 1.83" (162.7 × 79.4 × 46.6 mm)

• Weight: 8.8 oz. (250 g)

• Calibration: Accurate for one year

• Standards: Conforms to: UL STD 61010-1, 61010-2-030,

61010-2-033.

Certified to: CSA STD C22.2 # 61010-1,

61010-2-030, 61010-2-033.

IEC EN 61010-1, 61010-2-030,

61010-2-033, 61326-1.

• Pollution degree: 2

• Accuracy: ± (% of reading + # of least significant digits)

• Drop Protection: 6.6 ft. (2m)

• Safety Rating: CAT III 600V, Class 2, Double insulation

CAT III: Measurement category III is applicable to test and

measuring circuits connected to the distribution part of the

building’s low-voltage MAINS installation.

• Electromagnetic Environment: IEC EN 61326-1. This

equipment meets requirements for use in basic and controlled

electromagnetic environments like residential properties,

business premises, and light-industrial locations.

Specifications subject to change.

ENGLISH

ELECTRICAL SPECIFICATIONS

VOLTAGE (AUTO-RANGING)

Function Range Resolution Accuracy

AC Voltage

(V AC)

4.000V 1mV

±(1.0% + 3 digits)40.00V 10mV

400.0V 100mV

600V 1V ±(1.2% + 5 digits)

DC Voltage

(V DC)

400.0mV 0.1mV

±(0.5% + 5 digits)4.000V 1mV

40.00V 10mV

400.0V 100mV ±(0.8% + 3 digits)

600V 1V ±(1.0% + 3 digits)

Input Impedance: 10MΩ

Frequency Range: 50 to 400Hz

Maximum Input: 600V AC RMS or 600V DC

CURRENT (AUTO-RANGING)

AC Current

(μA and mA)

400.0μA 0.1μA

±(1.0% + 5 digits)

4000μA 1μA

40.00mA 10μA

400.0mA 100μA

4.000A 1mA ±(2.0% + 3 digits)

10.00A 10mA ±(2.0% + 5 digits)

DC Current

(μA and mA)

400.0μA 0.1μA

±(1.0% + 5 digits)

4000μA 1μA

40.00mA 10μA

400.0mA 100μA

4.000A 1mA ±(2.0% + 5 digits)

10.00A 10mA

Overload Protection: 500mA / 600V and 10A / 600V Fuses

Frequency Range: 50 to 400Hz

Maximum Input: µA/mA setting: 400mA AC RMS / DC

10A setting: 10A AC RMS / DC

RESISTANCE (AUTO-RANGING)

Range Resolution Accuracy

400.0Ω 0.1Ω

±(1.2% + 5 digits)

4.000kΩ 1Ω

40.00kΩ 10Ω

400.0kΩ 100Ω

4.000MΩ 1kΩ

40.00MΩ 10kΩ ±(2.0% + 10 digits)

50.0MΩ 0.1MΩ ± ( 2.8% + 10 digits )

Maximum Input: 600V DC or 600V AC RMS

ELECTRICAL SPECIFICATIONS

CAPACITANCE (AUTO-RANGING)

Range Resolution Accuracy

40.00nF 10pF ±(3.5% + 10 digits)

400.0nF 0.1nF

±(3.0% + 5 digits)4.000μF 1nF

40.00μF 10nF

400.0μF 0.1μF ±(3.5% + 5 digits)

Maximum Input: 600V DC or 600V AC RMS

FREQUENCY (AUTO-RANGING)

9.999Hz 0.001Hz

±(1.0% + 5 digits)

99.99Hz 0.01Hz

999.9Hz 0.1Hz

9.999kHz 1Hz

50.00kHz 10Hz

Voltage Range: >2V to 220V RMS

Maximum Input: 600V DC or 600V AC RMS

DUTY CYCLE

1.0% to 99.9%

0.1% ±(1.2% + 2 digits)

Pulse Width: 0.1 to 100ms

Frequency Width: 5Hz to 10kHz

Voltage Range: >2V to 220V RMS

Maximum Input: 600V DC or 600V AC RMS

TEMPERATURE

-40°to 10°F 1°F ±(1.2% + 7°F)

11° to 1832°F 1°F ±(1.2% + 6°F)

-40° to -12°C 1°C ±(1.2% + 4°C)

-11° to 1000°C 1°C ±(1.2% + 3°C)

ENGLISH

ELECTRICAL SPECIFICATIONS

• Diode Test: 1.8 mA max, open circuit voltage 3.9V DC

• Continuity Check: Audible signal <50Ω

• Sampling Frequency: 3 samples per second

• Overload: "OL" indicated on display, overload protection

600V RMS in all settings

• Polarity: "-" on display indicates negative polarity

• Display: 3 ¾ digit, 4000 Count LCD

WARNINGS

To ensure safe operation and service of the meter, follow these

instructions. Failure to observe these warnings can result in

severe injury or death.

• Before each use verify meter operation by measuring a known

voltage or current.

• Never use the meter on a circuit with voltages that exceed the

category based rating of this meter.

• Do not use the meter during electrical storms or in wet weather.

• Do not use the meter or test leads if they appear to be damaged.

• Use only with CAT III or CAT IV rated test leads.

• Ensure meter leads are fully seated, and keep fingers away

from the metal probe contacts when making measurements.

• Do not open the meter to replace batteries while the probes

are connected.

• Use caution when working with voltages above 25V AC RMS

or 60V DC. Such voltages pose a shock hazard.

• To avoid false readings that can lead to electrical shock,

replace batteries when a low battery indicator appears.

• Do not attempt to measure resistance or continuity on a live

circuit.

• Always adhere to local and national safety codes. Use personal

protective equipment to prevent shock and arc blast injury

where hazardous live conductors are exposed.

SYMBOLS ON METER

AC/DC Voltage or Current Resistance (in Ohms)

Audible Continuity Diode

Capacitance

Frequency

Duty-cycle Double Insulated Class II

Temperature (Fahrenheit / Celsius) Ground

Fuse (with rating below symbol) Backlight

Warning or Caution Read Instructions

To ensure safe operation and service of this meter, follow all warnings

and instructions detailed in this manual.

Risk of Electrical Shock

Improper use of this meter can lead to risk of electrical shock. Follow

all warnings and instructions detailed in this manual.

SYMBOLS ON LCD

Data Hold Audible Continuity

Diode Auto Ranging

Alternating Current

Direct Current

Low Battery Auto Power Off

MAX

Maximum Value

MIN

Minimum Value

°F

Degrees Fahrenheit

°C

Degrees Celsius

Mega (value x 10

)

kilo (value x 10

)

mili (value x 10

-3

)

micro (value x 10

-6

)

nano (value x 10

-9

)

Volts

Amps

Farads

Ohms

Hertz (Frequency)

Duty-Cycle Hazardous Voltage

ENGLISH

FEATURE DETAILS

3 54

1. 4000 count LCD display 7. "RANGE" button

2. Function selector switch 8. "MAX/MIN" button

3. "10A" jack 9. "HOLD" (Data Hold) button

4. "COM" jack 10. "SEL" (Select) button

5. "VΩ" jack 11. Lead Alert LEDs

6. Backlight button

NOTE: There are no user-serviceable parts inside meter.

FUNCTION BUTTONS

ON/OFF

To Power ON the meter rotate the Function Selector switch

from the

OFF setting to any measurement setting. To Power OFF the meter rotate the

Function Selector switch

to the OFF setting. By default, the meter will

automatically Power OFF after 15 minutes of inactivity. Reactivate meter by

pressing any button. To deactivate the automatic Power OFF feature, power

the meter ON with the SEL button

depressed. When automatic Power

OFF is deactivated, the symbol will not be visible in the display.

"SEL" (SELECT) BUTTON (FOR SECONDARY FUNCTIONS)

The "SEL" button

activates the secondary function for each application

accessible by the function selector switch

. For current and voltage, it

toggles between AC and DC. For the other functions, it switches between °F

and °C, between Hz and % Duty-cycle, between Continuity and Resistance,

and between Capacitance and Diode-test. The default function for each

application is printed on the meter in white; the secondary function for each

location is printed on the meter in orange.

"HOLD" (DATA HOLD) BUTTON

Press the "HOLD" button

to hold the measurement on the display. Press

again to release the display and return to live measuring.

"RANGE" BUTTON

The meter defaults to auto-ranging measurement mode . This

automatically determines the most appropriate measurement range for the

testing that is being conducted. To manually force the meter to measure in a

different range, use the "RANGE" button

1. Press the "RANGE" button

to manually select measurement range

(is deactivated on the LCD). Repeatedly press the "RANGE"

button

to cycle through the available ranges, stopping once the

desired range is reached.

2. To return to auto-ranging mode, press and hold the "RANGE" button

for more than one second ( is reactivated).

"MAX/MIN" BUTTON

When the "MAX/MIN" button

is pressed, the meter keeps track of the

minimum and maximum value of the measurement as the meter continues

to take samples. The first press of the "MAX/MIN" button

displays the

Max value, the second press displays the Min value.

To return to normal measuring mode, press and hold the "MAX/MIN" button

for more than one second.

BACKLIGHT BUTTON

Press the Backlight button

to turn the backlight on or off. Backlight

automatically turns off after approximately 3 minutes.

LEAD ALERT LEDs

When the Function Selector switch

is rotated to a measurement setting,

the Lead Alert LEDs

will illuminate to ensure that the test leads are

inserted into the appropriate jacks. The lights will automatically turn off after

2 minutes. To disable the Lead Alert LEDs

, hold the Backlight button

and turn the Function Selector switch

to any setting other than OFF.

NOTE: Lead Alert function will reactivate by default when the meter

powers OFF or when the Function Selector switch

is rotated.

ENGLISH

OPERATING INSTRUCTIONS

CONNECTING TEST LEADS

Do not test if leads are improperly seated. Results could cause

intermittent display readings. To ensure proper connection, firmly

press leads into the input jack completely.

TESTING IN CAT III / CAT IV MEASUREMENT LOCATIONS

Ensure the test lead shield is pressed firmly in place. Failure to use

the CAT III / CAT IV shield increases arc-flash risk.

TESTING IN CAT II MEASUREMENT LOCATIONS

CAT III / CAT IV shields may be removed for CAT II locations. This

will allow testing on recessed conductors such as standard wall

outlets. Take care not to lose the shields.

INCORRECT

CORRECT

0.7" (18 mm)

5/32"

(4 mm)

5/32

(4 mm)

AC/DC CURRENT

NOTE: The meter defaults to AC measurement. Press the "SEL"

button

to toggle between AC and DC modes. The AC or DC icon

on the LCD indicates which mode is selected.

1. Attach test leads to the appropriate jacks and rotate function

selector switch

to the appropriate setting as follows:

• For AC/DC currents >400mA and <10A: Insert RED test lead into

10A jack

, and BLACK test lead into COM jack

, and rotate

function selector switch

to the 10A AC/DC setting.

ENGLISH

OPERATING INSTRUCTIONS

AC/DC VOLTAGE (LESS THAN 600V)

1. Insert RED test lead into VΩ jack

, and BLACK test lead into COM

jack

, and rotate function selector switch

to the V setting.

NOTE: The meter defaults to AC measurement. Press the "SEL"

button

to toggle between AC and DC modes. The

icon

on the LCD indicates which mode is selected.

2. Apply test leads to the circuit to be tested to measure voltage.

The meter will auto-range to display the measurement in the

most appropriate range.

NOTE: The hazardous voltage indicator will appear for voltages >30V.

NOTE: If "–" appears on the LCD, the test leads are being applied

to the circuit in reverse polarity. Swap the position of the leads to

correct this.

NOTE: When in a voltage setting and the test leads are open,

readings of order mV may appear on the display. This is noise and

is normal. By touching the test leads together to close the circuit

the meter will measure zero volts.

Red leadBlack lead

Red lead Black lead

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