Multimeters - Clemson University

Multimeters

by Shengying Liu and Wenqian Tao

• Introduction

• Digital Multimeter

• How to use

• Tips

IntroductionAn electronic instrument measuring voltage, current, resistance, capacitance, inductance and so on.

Digital MultimeterLCD display

function switch

commonground(COM)

key pad

Current: 10A Current: mACurrent: µADC VoltageAC Voltage

OFF: off positionResistance

Diode and Continuity (with beep)

CapacitanceTransistor: hFE

Frequency

Input 400mA ～ 10A current

Input hFE and 0.001mA ～ 400mA

currentInput voltage,

resistance, capacitance,frequency, diode and

continuitymeasurements.

LCD Display

battery is low

negativereading

autorangemode relative

continuitycheck mode

DC voltageor current

diodetest mode

data holdmode

transistor test mode

ac voltageor current

percentthe unit of duty cycle

Key Pad KEY FUNCTION OPERATION PERFORMED

RANGE V~, V uA, mA, Ω

1. Press RANGE to enter the manual ranging mode. 2. Press RANGE to step through the ranges available for the selected function. 3. Press and hold RANGE for 2 seconds to return to autoranging.

SELECTA, mA and uA Power up option

Switches between Diode Test and Continuity check.

Switches between dc and ac current.

Disable automatic power-off feature

Hz/ % V~, A, mA and uA

1. Press to start the frequency counter. 2. Press again to enter duty cycle (duty factor) mode. 3. Press again to exit the frequency counter mode.

HOLD Any switch position Press to enter and exit the data hold modeLIGHT Any switch position Press to turn the back light on for 5 sec

Terminalsterminal description

COMReturn terminal for all measurements. （Receiving the black test lead or the “com” plug of the special multi-function socket）

Input for voltage, resistance, capacitance,frequency, diode and continuity measurements. (Receiving the red test lead or the “+” plug of the special multi-function socket).

hFE uA mAInput for hFE and 0.001mA to 400mA current measurements. （Receiving the red test lead or the “+” plug of the special multi-function socket）

10 A Input for 400mA to 10A current measurements. (Receiving the red test lead)

 How to use

 How to useVoltmeter(In Parallel)

 How to useAmperemeter(In Series)

 How to useOhmmeter

 How to use

• Capacitance

• Diode

• Transistor

Tips

• Never touch the leads when measuring

• Never turn the button when measuring

• Pay attention to the ranges

• Before opening up the meter, always disconnect from all electric components.