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MT770

AC TRMS

CLAMP METER

INSTRUCTION MANUAL

II

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Summary of Contents for MT 770

Page 1: ...MT770 AC TRMS CLAMP METER INSTRUCTION MANUAL II ...

Page 2: ...2 ...

Page 3: ...rement 11 4 4 Diode and Continuity Measurements 11 4 5 Capacitance Measurements 12 4 6 Frequency or Duty Cycle Measurements 12 4 7 Temperature Measurements 12 4 8 Non ContactAC Voltage Measurements 13 5 Button 13 5 1 MODE INRUSH Button 13 5 2 RANGE Button 13 5 3 PEAK VFD Button 13 5 4 REL Backlight Button 14 5 5 Data Hold Flashlight Button 14 6 Battery Replacement 14 7 Maintenance 14 8 Cleaning an...

Page 4: ...st Do not exceed the maximum rated input limits 1 4 CAUTIONS Improper use of this meter can cause damage shock injury or death Read and understand this user manual before operating the meter Always remove the test leads before replacing the battery Inspect the condition of the test leads and the meter itself for any damage before operating the meter Repair or replace if damaged before use Use grea...

Page 5: ...LAMP METER AUTO POWER OFF CAT III 1000V CAT IV 600V CAP V Hz Ω Temp COM REL MODE RANGE PEAK INRUSH 2 1 Meter Description 1 Current Clamp 2 Non Contact AC Voltage Indicator Light 3 Clamp Trigger 4 Relative Backlight Button 5 LCD Display 6 MODE INRUSH Select Button 2 Description 7 RANGE Button 8 PEAK VFD Button 9 Rotary Function Switch 10 Data Hold Flashlight Button 11 Battery Cover 12 Flashlight 13...

Page 6: ...Low Battery 6 Inrush Current Mode 7 Auto Power Off 8 Auto Range Mode 9 Diode Test Mode 10 Audible Continuity 11 Peak Voltage Value 12 Relative Mode 13 Data Hold Mode 14 Variable Frequency Drive Voltage Value 15 Units of Measure List 16 Frequency Duty Cycle Test Mode 17 6000 Count Measurement Reading 2 2 Symbols Used on LCD Display ...

Page 7: ...C Voltage 50 400Hz Variable frequency Drive TEST AC voltage range 100V 600V AC voltage bandwidth 50 to 400Hz Sine 50 60 All wave Accuracy specified from 5 to 100 of the measuring range Maximum Input 1000V AC RMS VFD PEAK Maximum Input 1000V Range Resolution Accuracy of reading digits Function 6 000V 60 00V 300 0V 3 0 40 digits LoZ AC Voltage Maximum Input 300V AC Range Resolution Accuracy of readi...

Page 8: ...ts Function Note Accuracy is given as of reading counts of least significant digit at 23 C 5 C with relative humidity less than 80 RH AC voltage and current shall be subject to sine wave 9 999Hz to 99 99kHz 1 2 5 digits Frequency Sensitivity 5VRMS Range Resolution Accuracy of reading digits Function 10 0 to 90 0 1 2 2 digits Duty Cycle Sensitivity 5VRMS Input Protection 300V DC or 300V AC RMS Rang...

Page 9: ...e True RMS measurements can reliably measure any irregular waveform and obtain valid values for AC voltage or AC current Test current of 0 3mA typical Open circuit voltage 3 2V DC typical Threshold 50Ω Test current 0 5mA is displayed OL is displayed 2 per second nominal 10M VDC and VAC 6000 counts LCD 50 60Hz AAC 50 400Hz VAC 5 to 40 C 41 to 104 F 20 to 60 C 4 to 140 F Max 80 up to 31 C decreasing...

Page 10: ...1 AC Current Measurements WARNING Ensure that the test leads are disconnected from the meter before making current clamp measurements 1 Set the Function switch to the 1000A AC 600A AC range 2 If the range to be measured is not known select the higher range first then move to the lower range if necessary 3 Press the trigger to open jaw Fully enclose one conductor to be measured 4 The clamp meter LC...

Page 11: ...e side of the device under test so the rest of the circuit will not interfere with the resistance reading 4 For Resistance tests read the resistance on the LCD display 4 4 Diode and Continuity Measurements 1 Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive diode jack 2 Turn the rotary switch to the Ω CAP position 3 Press the MODE...

Page 12: ...gative COM jack and the red test lead banana plug into the positive V jack 3 Select Hz or duty with the MODE INRUSH button 4 Touch the test probe tips to the circuit under test 5 Read the frequency on the display 4 7 Temperature Measurements WARNING To avoid electric shock disconnect both test probes from any source of voltage before making a temperature measurement 1 Set the function switch to TE...

Page 13: ...utomatically goes into Auto Ranging This automatically selects the best range for the measurements being made and is generally the best mode for most measurements For measurement situations requiring that a range be manually selected perform the following 1 Press the RANGE button The Auto Range display indicator will turn off The Manual Range display indicator will turn on 2 Press the RANGE button...

Page 14: ... assemble the meter 7 Maintenance WARNING To avoid electrical shock disconnect the meter from any circuit remove the test leads from the input terminals and turn OFF the meter before opening the case Do not operate the meter with an open case 8 Cleaning and Storage 1 Periodically wipe the case with a damp cloth and mild detergent do not use abrasives or solvents If the meter is not to be used for ...

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Page 16: ...www major tech com www majortech com au sales major tech com info majortech com au MAJOR TECH PTY LTD South Africa Australia ...

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