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Klein Tools MM450 Instruction Manual
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Klein Tools MM450 Instruction Manual

Auto-ranging digital multimeter
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ENGLISH
INSTRUCTION MANUAL
Auto-Ranging
Digital Multimeter
True RMS
True RMS
Measurement
Technology
• HIGH VISIBILITY
DISPLAY
• LEAD ALERT
PROTECTION
• DATA HOLD
• AUDIBLE
CONTINUITY
• MIN / MAX
• TEMPERATURE
• DIODE TEST
• CAPACITANCE
600V
10A
50M
2 m
GlobalTestSupply
www.
MM450
5000573
CAT III
600V
.com
sales@GlobalTestSupply.com

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Summary of Contents for Klein Tools MM450

  • Page 1 MM450 ENGLISH INSTRUCTION MANUAL Auto-Ranging Digital Multimeter True RMS True RMS Measurement Technology • HIGH VISIBILITY DISPLAY • LEAD ALERT PROTECTION • DATA HOLD • AUDIBLE CONTINUITY • MIN / MAX • TEMPERATURE • DIODE TEST • CAPACITANCE 600V 5000573...

  • Page 2: General Specifications

    ENGLISH GENERAL SPECIFICATIONS Klein Tools MM450 is an auto-ranging, true root mean square (TRMS) 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. It features lead alert protection and a high visibility, reverse contrast LCD display with an optical sensor to automatically optimize viewability in dark or bright ambient lighting.
  • Page 3 ELECTRICAL SPECIFICATIONS VOLTAGE (AUTO-RANGING) Function Range Resolution Accuracy 4.000V AC Voltage 40.00V 10mV ±(1.0% + 3 digits) (V AC) 400.0V 100mV 600V ±(1.2% + 5 digits) 400.0mV 0.1mV 4.000V ±(0.5% + 5 digits) DC Voltage 40.00V 10mV (V DC) 400.0V 100mV ±(0.8% + 3 digits) 600V...

  • Page 4: Duty Cycle

    ENGLISH ELECTRICAL SPECIFICATIONS CAPACITANCE (AUTO-RANGING) Range Resolution Accuracy 40.00nF 10pF ±(3.5% + 10 digits) 400.0nF 0.1nF 4.000 F ±(3.0% + 5 digits) 40.00 F 10nF 400.0 F 0.1 F ±(3.5% + 5 digits) Maximum Input: 600V DC or 600V AC RMS FREQUENCY (AUTO-RANGING) 9.999Hz 0.001Hz...

  • Page 5: Electrical Specifications

    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 • Auto-Power Off: After ~5 minutes of inactivity • Overload: "OL" indicated on display, overload protection 600V RMS in all settings •...

  • Page 6: Symbols On Meter

    ENGLISH SYMBOLS ON METER AC/DC Voltage or Current Resistance (in Ohms) Audible Continuity Diode Capacitance Frequency Duty-cycle Double Insulated Class II °F/°C Temperature (Fahrenheit / Celsius) Ground Voltage (Volts) Amperage (Amps) Backlight Milliamps Fuse (with rating below symbol) Microamps Warning or Caution Read instructions To ensure safe operation and service of this meter, follow all warnings and instructions detailed in this manual.

  • Page 7: Feature Details

    FEATURE DETAILS FRONT SIDE BACK 4000 count Reverse Contrast Display Function selector switch "10A" jack "COM" jack "V " jack Backlight button "RANGE" button "MAX/MIN" button "HOLD" (Data Hold) button "SEL" (Select) button Lead Alert LEDs Optical Sensor Attachment slot for 69417 Magnetic Hanger NOTE: There are no user-serviceable parts inside meter.

  • Page 8: Function Buttons

    ENGLISH 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 5 minutes of inactivity.
  • Page 9 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. CORRECT INCORRECT TESTING IN CAT III / CAT IV MEASUREMENT LOCATIONS Ensure the test lead shield is pressed firmly in place.
  • Page 10 ENGLISH OPERATING INSTRUCTIONS AC/DC VOLTAGE (LESS THAN 600V) 1. Insert RED test lead into V 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.
  • Page 11 OPERATING INSTRUCTIONS 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: •...

  • Page 12: Resistance Measurements

    ENGLISH OPERATING INSTRUCTIONS 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.
  • Page 13 OPERATING INSTRUCTIONS CONTINUITY 1. Insert RED test lead into V jack , and BLACK test lead into COM jack , and rotate function selector switch 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.

  • Page 14: Diode Test

    ENGLISH OPERATING INSTRUCTIONS CAPACITANCE 1. Insert RED test lead into V jack , and BLACK test lead into COM jack , and rotate function selector switch to the Capacitance/Diode setting. NOTE: The meter defaults to Capacitance testing in this mode. Ensure that the display reads "0 nF"...

  • Page 15: Frequency / Duty-Cycle

    OPERATING INSTRUCTIONS FREQUENCY / DUTY-CYCLE 1. Insert RED test lead into V jack and BLACK test lead into COM jack , and rotate function selector switch 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"...

  • Page 16: Maintenance

    ENGLISH MAINTENANCE BATTERY REPLACEMENT When the indicator is displayed, the batteries must be replaced. 1. Remove screw from battery door. 2. Replace 2 × AAA batteries (note proper polarity). 3. Replace battery door and fasten securely with screw. To avoid risk of electric shock, disconnect leads from any voltage source before removing battery door.

  • Page 17: Fcc & Ic Compliance

    OPTIONAL MAGNETIC HANGER 69417 To attach 69417 Magnetic Hanger (sold separately): 1. Open strap and remove clip end (not needed). 2. Loop strap through Attachment Slot on back of meter. 3. Close strap. REMOVE CLEANING Be sure meter is turned off and wipe with a clean, dry lint-free cloth.