Extech Instruments MultiTec MT310 User Manual Download

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Replacing the Fuses

Open the battery/fuse door by loosening the two screws on the battery/fuse door using a Phillips head
screwdriver.

Remove the old fuse from its holder by gently pulling it out.

To access the 20A fuse, remove the third screw under the tilt stand, remove the back cover and gently lift the
printed circuit boards.

Install the new fuse into the holder.

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.

Put the battery/fuse door back in place. Insert the screws and tighten securely.

Summary of Contents for MultiTec MT310

Page 1: ...User s Guide MultiTecTM Series Digital MultiMeters with PC Interface Models MT310 MT320 MT330...

Page 2: ...eration outside of specification improper maintenance or repair or unauthorized modification Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose a...

Page 3: ...ance Frequency and Capacitance All models are Autoranging and include a PC Interface feature The MT320 and MT330 also measure temperature The Model MT330 is True RMS responding Safety International Sa...

Page 4: ...ts 6 Use great care when making measurements if the voltages are greater than 25VAC rms or 35VDC These voltages are considered a shock hazard 7 Always discharge capacitors and remove power from the de...

Page 5: ...reading 5 digits 100 0 400 0mV 1 5 reading 5 digits 4 000V 40 00V 400 0V 1 0 reading 5 digits 40Hz to 1kHz AC Voltage V AC Model MT330 True RMS 700 0V 1 5 reading 5 digits 400 0 A 4000 A 40 00mA 400 0...

Page 6: ...z 500 0Hz 5 000kHz 50 00kHz 500 0kHz 5 000MHz 10 00MHz 0 1 reading 2 digits 250mVac peak minimum Capacitance 40 00nF 400 0nF 4 000uF 40 00uF 100 0uF 2 reading 10 digits 0 0 212 0 F 3 5 digits 212 0 40...

Page 7: ...C peak General Specifications Duty Cycle 0 1 to 99 9 Diode Test Test voltage of 1 5V max Continuity Check Audible tone if the resistance is less than 60 Input Impedance 10M VDC and VAC 100M in the 400...

Page 8: ...ure 64 o F to 82 o F 18 o C to 28 o C Relative Humidity 80 RH operating 70 RH storage Dimensions Weight 3 5x7x1 3 88x178x33mm 0 7lb 315g Description Meter MT330 pictured 1 3 3 4 Digit 4000 count Liqui...

Page 9: ...own fuse indicator 7 uA mA blown fuse indicator 8 Incorrect test lead insertion indicator active in Capacitance Hz Ohms Diode Continuity and ACV DCV modes 9 Power warning for Ohm Cap and Diode 10 Cont...

Page 10: ...POWER key wait three seconds and press the POWER key again 2 If OL appears on the display during a measurement the measurement exceeds the range selected Change to a higher range AC or DC Voltage Meas...

Page 11: ...to 400mA set the function switch to the mA position and insert the red test lead into the mA A jack 4 For current measurements up to 20A AC set the function switch to the 20A position and insert the...

Page 12: ...It is best to disconnect one side of the part under test so the rest of the circuit will not interfere with the resistance reading 5 For Resistance tests read the resistance on the display 6 For Conti...

Page 13: ...ads Note this reading 6 The diode or junction can be evaluated as follows A If one reading shows a value and the other reading shows OL the diode is good B If both readings show OL the device is open...

Page 14: ...device under test 4 Wait 30 seconds for the measurement to stabilize then read the LCD Auto Manual Range The meter powers up in Auto Range mode For Manual range applications follow these steps 1 Pres...

Page 15: ...2 Press the REL button to store the present reading and the REL indicator will appear on the display 3 The display will now indicate the difference between the stored value and the measured value LCD...

Page 16: ...s 1 When the battery drops below the operating voltage the battery symbol will appear in the right hand side of the LCD display The battery should be replaced at this point 2 Remove power from the met...

Page 17: ...ng it out 3 To access the 20A fuse remove the third screw under the tilt stand remove the back cover and gently lift the printed circuit boards 4 Install the new fuse into the holder 5 Always use a fu...

Page 18: ...he RS 232 cable between the meter s DB 9 connector top of meter and the PC s serial port 2 Select the Multimeter icon in the START PROGRAM menu 3 Select Setup from the Main Menu bar and then Com Port...