MM400 - Multimeter Klein Tools - Free user manual and instructions

USER MANUAL MM400 Klein Tools

GENERAL SPECIFICATIONS Klein Tools MM400 is an auto-ranging 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.

• 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

• 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.

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

• Drop Protection: 3.3 ft. (1m)

• 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.

• 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.6

AC/DC Voltage or Current Resistance (in Ohms) Audible Continuity Diode Capacitance

Duty-cycle Double Insulated Class II

Temperature (Fahrenheit / Celsius) Ground Fuse (with rating below symbol) Warning or Caution 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.

Data Hold Audible Continuity Diode Auto Ranging AC (Alternating Current) DC (Direct Current) Low Battery Auto Power Off MAX Maximum Value MIN Minimum Value

"HOLD" (Data Hold) button

"SEL" (Select) button NOTE: There are no user-serviceable parts inside meter.8 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 30 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

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.

for more than one second ( is reactivated).

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

for more than one second. BACKLIGHT BUTTON Press and hold the backlight button

for more than one second to turn the backlight on or off. Backlight automatically turns off after approximately 3 minutes. ENGLISH9 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. 5/32" (4 mm) .7" (18 mm) INCORRECT CORRECT10 ENGLISH OPERATING INSTRUCTIONS AC/DC VOLTAGE (LESS THAN 600V)

1. Insert RED test lead into VΩ jack

, and BLACK test lead into COM jack

the V setting. 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.

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: 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 lead11 OPERATING INSTRUCTIONS

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

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

to the 10A AC/DC setting.

• For mA AC/DC currents <400mA: Insert RED test lead into VΩ jack

, and BLACK test lead into COM jack

to the mA AC/DC setting.

• For µA DC currents <400µA: Insert RED test lead into VΩ jack

, and BLACK test lead into COM jack

to the µA AC/DC setting. Red lead Black lead Red lead Black lead Red lead Black lead12 ENGLISH

2. To measure current: Remove power from circuit, open circuit at

measurement point, connect meter in-series in the circuit using the test leads, and apply power to circuit.

3. Measure the current. The meter will auto-range to display the

measurement in the most appropriate range. Do not attempt to measure more than 10A. When measuring currents greater than 6A, a measurement time of 30 seconds followed by 10 minutes of recovery time is recommended. RESISTANCE MEASUREMENTS

1. Insert RED test lead into VΩ jack

, and BLACK test lead into COM jack

to the Continuity/Resistance setting. NOTE: The meter defaults to Continuity testing in this mode. To enter Resistance testing mode, press the "SEL" button

once. The Resistance icon will appear on the display.

2. Remove power from circuit.

3. Measure resistance by connecting test leads to circuit. The

meter will auto-range to display the measurement in the most appropriate range. NOTE: When in a Resistance setting and the test leads are open (not connected across a resistor), or when a failed resistor is under test, the display will indicate O.L. This is normal. DO NOT attempt to measure resistance on a live circuit. OPERATING INSTRUCTIONS Red lead Black lead13 OPERATING INSTRUCTIONS CONTINUITY

1. Insert RED test lead into VΩ jack

, and BLACK test lead into COM jack

to the Continuity/Resistance setting. NOTE: The meter defaults to Continuity testing in this mode. Ensure that the Continuity Testing icon is visible on the display. If not, press the "SEL" button

2. Remove power from circuit.

3. Test for continuity by connecting conductor or circuit with test

leads. If resistance is measured less than 50Ω, an audible signal will sound and display will show a resistance value indicating continuity. If circuit is open, display will show "OL". DO NOT attempt to measure continuity on a live circuit. Red lead Black lead14 ENGLISH OPERATING INSTRUCTIONS CAPACITANCE

1. Insert RED test lead into VΩ jack

, and BLACK test lead into COM jack

to the Capacitance/Diode setting. NOTE: The meter defaults to Capacitance testing in this mode. Ensure that the display reads "0 nF" with test leads open. If not, press the "SEL" button

2. Remove power from circuit.

3. Measure capacitance by connecting test leads across the

capacitor. The meter will auto-range to display the measurement in the most appropriate range. DIODE TEST

1. Insert RED test lead into VΩ jack

, and BLACK test lead into COM jack

once. The Diode icon will appear on the display.

2. Touch test leads to diode. A reading of 200-700mV on display

indicates forward bias, "OL" indicates reverse bias. An open device will show "OL" in both polarities. A shorted device will show approximately 0mV. Red lead Black lead Red lead Black lead15 Remove thermocouple before switching meter to other measurement functions. The thermocouple included with the original purchase is suitable for temperatures below 356°F / 180°C only. To measure higher temperatures, a K-type thermocouple with the appropriate measurement range should be used. OPERATING INSTRUCTIONS FREQUENCY / DUTY-CYCLE

1. Insert RED test lead into VΩ jack

and BLACK test lead into COM jack

to the Frequency/Duty-Cycle setting. NOTE: The meter defaults to Frequency testing in this mode. To enter Duty-Cycle testing mode, press the "SEL" button

once. Ensure that the appropriate icon (either

) appears on the display.

2. Measure by connecting test leads across the circuit.

1. Insert K-type thermocouple into the VΩ

jacks, and rotate function selector switch

once. Ensure that the appropriate icon (either

) appears on the display. Default temperature scale may be changed by powering on the meter with the "HOLD" button

2. To measure temperature, make contact between the thermocouple

tip and the object being measured. When thermocouple tip and object are in thermal equilibrium, the measurement on the display will stabilize. The meter will auto-range to display the measurement in the most appropriate range. RED BLACK K-Type Thermocouple with Adapter ThermocoupleAdapter Red lead Black lead16 ENGLISH MAINTENANCE BATTERY REPLACEMENT When indicator is displayed on LCD, batteries must be replaced.

1. Remove screw from battery door.

2. Replace 2 x AAA batteries (note proper polarity).

3. Replace battery door and fasten securely with screw.

FUSE REPLACEMENT A fuse may blow if more than 500mA is applied to the

or more than 10A is applied to the 10A jack

1. Remove 6 screws from back of meter and remove back housing.

3. Replace back housing and fasten securely with screws.

o avoid risk of electric shock, disconnect leads from any voltage source before removing battery door. To avoid risk of electric shock, do not operate meter while battery door is removed. To avoid risk of electric shock, disconnect leads from any voltage source before accessing fuses. To avoid risk of electric shock, do not operate meter while back housing is removed. 500mA/600V fast-blow fuse (Klein Cat. No. 69033) 10A/600V fast-blow fuse (Klein Cat. No. 69032)17 CLEANING Be sure meter is turned off and wipe with a clean, dry lint-free cloth. Do not use abrasive cleaners or solvents. STORAGE Remove the batteries when meter is not in use for a prolonged period of time. Do not expose to high temperatures or humidity. After a period of storage in extreme conditions exceeding the limits mentioned in the General Specifications section, allow the meter to return to normal operating conditions before using. WARRANTY www.kleintools.com/warranty DISPOSAL / RECYCLE Do not place equipment and its accessories in the trash. Items must be properly disposed of in accordance with local regulations. Please see www.epa.gov or www.erecycle.org for additional information. CUSTOMER SERVICE KLEIN TOOLS, INC. 450 Bond Street Lincolnshire, IL 60069 1-877-775-5346 [e-mail] www.kleintools.comNOTES

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