Extech Instruments MA440 User Manual Download Page 1 | Manualshive

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USER

MANUAL

Model

MA440

400A

AC

Clamp

Meter

DMM

Model

MA443

True

RMS

400

AC

Clamp

Meter

DMM

Model

MA445

True

RMS

400A

AC/DC

Clamp

Meter

DMM

1
2
3
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Summary of Contents for MA440

Page 1: ...USER MANUAL Model MA440 400A AC Clamp Meter DMM Model MA443 True RMS 400 AC Clamp Meter DMM Model MA445 True RMS 400A AC DC Clamp Meter DMM...

Page 2: ...ed and calibrated and with proper use will provide years of reliable service Please visit our website www extech com to check for the latest version of this User Guide Product Updates Product Registra...

Page 3: ...60 days 9 Do not service or modify the internal circuits of the meter Qualified personnel must service the meter only 10 Do not use the meter in flammable or explosive environments gas or vapors Do n...

Page 4: ...e or high humidity Safety Symbols This symbol adjacent to another symbol indicates the user must refer to the manual for further information Risk of electrical shock Alert beeper Equipment protected b...

Page 5: ...ht button MA443 and MA445 11 NCV sensor Note Battery compartment is located on back of meter Fig 1 Meter Description Display Description Relative mode icon Units of Frequency Alternating Direct Curren...

Page 6: ...ent measurements will be displayed as measurement minus reference value This feature applies to AC DC voltage AC current resistance and temperature modes only Short press to exit For DC current measur...

Page 7: ...r switches OFF after 30 minutes MA440 or 15 minutes MA443 MA445 of inactivity The MA443 MA445 models emit a warning tone prior to automatically switching off Disable Auto Power OFF MA443 and MA445 To...

Page 8: ...ing AC Amperes Amps The display icon AUTO will also appear indicating automatic ranging 3 Press the jaw trigger to open the clamp jaw 4 Position the clamp around only one conductor See Fig 2 for corre...

Page 9: ...3 and Fig 4 4 Press the jaw trigger to open the clamp jaw Position the clamp around only one conductor See Fig 2 previous section for correct and incorrect clamping techniques 5 Read the current in t...

Page 10: ...oint and value 6 Relative REL mode can be used to set a reference reading from which subsequent readings will be offset reference reading actual reading displayed reading Long press the REL button to...

Page 11: ...test probe tips across the circuit or part under test It is best to disconnect one side of the part under test so that the rest of the circuit will not interfere with the resistance reading 5 Read th...

Page 12: ...k See Fig 7 above 4 Touch the test probe tips across the circuit or wire 5 If the resistance is 30 the meter will beep If the resistance is 60 the meter will not beep If the resistance is between 30 a...

Page 13: ...ive COM jack Insert the red test lead banana plug into the positive jack See Fig 9 4 Touch the test probe tips across the circuit or component 5 Read the Capacitance measurement on the meter display F...

Page 14: ...nsert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive V jack See Fig 10 4 Touch the test probes to the diode under test in both polarity...

Page 15: ...ocouple Do not measure temperature if the meter is in an environment outside the range of 18 28o C Do not input voltages 30V DC or AC to the meter 1 Turn the function switch to the TEMP position 2 Use...

Page 16: ...g When the sensed field is at highest levels the meter s NCV lamp and beeper rate will become as one continuous light and tone If the meter does not react as described above to an AC voltage or electr...

Page 17: ...rtment 3 Replace the three 3 1 5V AAA batteries observing correct polarity 4 Re assemble the meter before use 5 Safety Please dispose of batteries responsibly never dispose of batteries in a fire batt...

Page 18: ...range Frequency response 50 60Hz MA440 and MA443 and 40 400Hz MA445 MA443 MA445 AC Crest factor considerations a Add 4 MA443 3 MA445 when wave factor is 1 2 b Add 6 MA443 5 MA445 when wave factor is 2...

Page 19: ...A440 50 00nF 0 01 nF 4 0 25 digits 600V AC DC 500 0nF 0 1 nF 4 0 5 digits 5 000 F 0 001 F 50 00 F 0 01 F 100 0 F 0 1 F Capacitance MA443 and MA445 40 00nF 0 01 nF 4 0 25 digits 600V AC DC 400 0nF 0 1...

Page 20: ...0 400 o C 400 1000 o C 1 0 3 digits 40 104 o F 1o F 3 0 10 digits 104 752 o F 752 1832 o F 1 0 6 digits Does not include accuracy of the Type K temperature probe Non Contact Voltage Detector NCV 100Vr...

Page 21: ...mum applied to any terminal Low battery indication is displayed Auto Power OFF After 30 minutes MA440 or 15 minutes MA443 and MA445 Hold M button while turning meter ON to disable APO MA443 and MA445...

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