Extech Instruments AUT500, User Manual

Page 1: ...USER GUIDE Automotive Multimeter MODEL AUT500 ...

Page 2: ...sult in death or serious injury This CAUTION symbol indicates a potentially hazardous situation which if not avoided may result damage to the product This symbol advises the user that the terminal s so marked must not be connected to a circuit point at which the voltage with respect to earth ground exceeds in this case 600 VAC or VDC CAUTIONS Improper use of this meter can cause damage shock injur...

Page 3: ...ach the vehicle exhaust system to the shop exhaust removal system Set the parking brake and block the wheels before testing or repairing the vehicle It is especially important to block the wheels on front wheel drive vehicles the parking brake does not hold the drive wheels Wear an eye shield when testing or repairing vehicles Keep the meter away from spark plug and coil wires Exceeding the limits...

Page 4: ...ype K Temperature Frequency Duty Pulse ms Dwell RPM 600V AC or DC mA AC DC 400mA 250V 20A AC DC 20A AC or DC 20A measurements for 30 seconds maximum Notes Resistance Ohms cannot be measured if voltage is present Resistance can only be measured on a non powered circuit 2 USE EXTREME CAUTION when working with high voltages 3 DO NOT measure voltage if the voltage on the COM input jack exceeds 600V ab...

Page 5: ... 6 MAX MIN button 7 Backlight button 8 Function switch 9 20A input jack 10 400mA input jack 11 Positive input jack 12 COM input jack Note Tilt stand test lead holders and battery compartment are located on rear of unit Fuses are accessible by removing the meter s back cover instructions provided later in this guide ...

Page 6: ...z frequency V Volts Percent REL Relative unused in this model AC Alternating current DC Direct current MAX Highest reading MIN Lowest reading ºF Degrees Fahrenheit ºC Degrees Centigrade Pmax Maximum peak Pmin Minimum peak RPM Rotations per minute Trig Positive or Negative Trigger CYL Cylinder 4 5 6 and 8 Display Hold x10 Multiply displayed reading by 10 Bargraph Manual range top left on LCD AUTO A...

Page 7: ...aused by the high input sensitivity The reading will stabilize and give a proper measurement when connected to a circuit DC VOLTAGE MEASUREMENTS CAUTION Do not measure DC voltages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can damage the meter 1 Set the function switch to the V position 2 Press the MODE button to indicate DC on the display 3 Insert th...

Page 8: ...red test probe tip to the hot side of the circuit 5 Read the voltage in the display as numerical digits and as bar graph representation DC CURRENT MEASUREMENTS CAUTION Do not make current measurements on the 20A scale for longer than 30 seconds Exceeding 30 seconds may cause damage to the meter and or the test leads 1 Insert the black test lead banana plug into the negative COM jack 2 For current ...

Page 9: ... current 6 Touch the black test probe tip to the neutral side of the circuit Touch the red test probe tip to the hot side of the circuit 7 Apply power to the circuit 8 Read the current in the display as numerical digits and as bar graph representation RESISTANCE MEASUREMENTS WARNING To avoid electric shock disconnect power to the unit under test and discharge all capacitors before taking any resis...

Page 10: ...e red test lead banana plug into the positive V jack 3 Press the MODE button to indicate and V on the display 4 Touch the test probes to the diode under test Forward voltage will typically indicate 0 400 to 0 700V Reverse voltage will indicate OL Shorted devices will indicate near 0V and an open device will indicate OL in both polarities CONTACT TEMPERATURE MEASUREMENTS TYPE K 1 Set the function s...

Page 11: ... position 2 Insert the black lead banana plug into the negative COM jack and the red test lead banana plug into the positive Hz jack 3 Touch the test probe tips to the circuit under test 4 Read the frequency on the display DUTY CYCLE 1 Set the rotary function switch to the position 2 Insert the black lead banana plug into the negative COM jack and the red test lead banana plug into the positive ja...

Page 12: ...ead the pulse size in milliseconds on the display Note Initially the meter will read OL over range and then readings will descend and stabilize to the actual pulse width If OL remains on the meter display re check the connections and test setup DWELL MEASUREMENTS 1 Set the rotary function switch to the DWELL position 2 Insert the black lead banana plug into the negative COM jack and the red test l...

Page 13: ...1 millisecond in duration for AC DC Current or Voltage 1 Press the PEAK button momentarily and the Pmax display icon will appear The meter is now displaying captured peaks highest The display will only change when a higher peak is detected 2 Press the PEAK button again and the Pmin display icon will appear The meter is now capturing the lowest peaks 3 Press and hold the PEAK button for 2 seconds t...

Page 14: ... 50 to 60Hz 40mA 0 01mA 1 8 reading 5 digits 400mA 0 1mA 20A 0 01A 3 0 reading 7 digits Resistance 400 0 1 1 2 reading 4 digits 4k 0 001k 1 0 reading 2 digits 40k 0 01k 1 2 reading 2 digits 400k 0 1k 4M 0 001M 40M 0 01M 2 0 reading 3 digits Capacitance 4nF 1pF 5 0 reading 50 digits 40nF 10pF 5 0 reading 7 digits 400nF 0 1nF 3 0 reading 5 digits 4 F 1nF 40 F 10nF 400 F 0 1 F 4mF 0 001mF 10 0 readin...

Page 15: ...ensitivity 5V RMS RPM 4 tachometer 600 to 4000 RPM 1 RPM 2 0 reading 4 digits 1000 to 12000 x10 RPM 10 RPM RPM 2 DIS 300 to 4000 RPM 1 RPM 1000 to 6000 x10 RPM 10 RPM Effective Reading 600V DWELL ANGLE 4 CYL 0 to 90 0 o 0 1 o 2 0 reading 4 digits 5 CYL 0 to 72 0 o 6 CYL 0 to 60 0 o 8 CYL 0 to 45 0 o NOTES Accuracy is stated at 18 o C to 28 o C 65 o F to 83 o F and less than 75 RH Accuracy specific...

Page 16: ...gnal will sound if the resistance is less than 35 Temperature Sensor Type K thermocouple with mini jack and banana jack adaptor supplied Fuses 400mA range 0 5A 250V fast blow 20A range 20A 250V ceramic fast blow Power One 1 9V battery NEDA 1604 Low Battery Indication Battery symbol indicates battery power status Auto Power OFF Meter switches OFF after 30 minutes of inactivity Operating conditions ...

Page 17: ...old or weak batteries so they do not leak and damage the unit 6 IF THE METER IS TO BE STORED FOR A LONG PERIOD OF TIME the batteries should be removed to prevent damage to the unit BATTERY REPLACEMENT 1 Remove the Phillips head screw at the center back of the meter that secures the rear battery compartment door 2 Open the battery compartment 3 Replace the 9V battery 4 Secure the battery compartmen...

Page 18: ... meter 3 Gently pull the meter s rear cover off of the meter to access the fuses 4 Gently remove the old fuse from its holder and install the new fuse into the same holder 5 Always use a fuse of the proper size and value 0 5A 250V fast blow for the 400mA range 20A 250V fast blow for the 20A range 6 Re assemble the meter by replacing and secure the rear cover with the screws WARNING To avoid electr...