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FaraDigi FDM18A User Manual

True rms multimeter
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Table of Contents
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Summary of Contents for FaraDigi FDM18A

  • Page 2: Table Of Contents

    Contents 1. General Information ................. 1 1.1 Safety information ..................1 1.1.1 Safety instructions ................1 1.1.2 Safety considerations ..............1 1.1.3 Safety symbol: ................... 3 1.1.4 Maintenance practices for safety ..........3 1.2 Input protection measures ..............4 2. A Schematic Diagram for the Meter ..........4 2.1 A Schematic Diagram for the Meter ..........

  • Page 4: General Information

    General Information 1. General Information This digital multimeter 1s designed and manufactured in compliance with IEC-61010 safety requirements on electronic measuring instruments and hand-held digital multi-meters. It is compliant with IEC-61010 requirements pertaining to 600V CAT IV, 1000V CAT.ill and requirements on pollution degree 2. Please read carefully this Operation Manual and pay attention to safety guidelines before operating this meter.

  • Page 7: Input Protection Measures

    Schematic diagrams for the meter professionals. When the meter's case is opened, the operator must understand the fact that the presence of some capacitance may promise the dangerous voltages even if the power supply to the meter is cut off. The operator should stop using and maintain the meter immediately if any abnormality has been observed on the meter.

  • Page 10: Description Of Functional Keys

    Schematic diagrams for the meter Table.l Symbols (Continued) V: the unit of volt V, mV mV : Millivolt , volt. lxl0- 0.001 Ampere, the unit of current. Milliampere, lxl0- 0.001 µ A : ampere. A, mA, µA Microampere, 0.000001 lxl0- ampere.

  • Page 12: Operational Guidelines

    Operational guidelines 3. Operational guidelines 3.1 Normal operation 3.1.1 Hold mode In the hold mode, the reading can be maintained on the display unit. Changing the measurement function position or pressing the key Hold again to exit the hold mode. Hold mode: entry and exit 1.

  • Page 14: Electric Resistance Measurement

    Operational guidelines 3.2.2 Electric resistance measurement .&. To avoid the meter or the measured equipment from · damage, do not attempt a resistance measurement ,the operator has already cut off all power sources for circuit measured fully discharged hi h-volta e ca Ohm is the unit of electric resistance (n).

  • Page 17: Current Measurement

    Operational guidelines 4. Read the measured frequency on LCD screen. 3.2. 7 Current measurement &. Do not attempt a measurement on the current in a circuit, · if when the voltage between the open-circuit voltage and the ground is over 250V. If the fuse is blown at the moment of measurement, you are likely to damage the meter or get yourself hurt.
  • Page 19 ° C and relative humidity is below 80%). Storage temperature & humidity: -10-60°C (batteries shall be removed when RH is below 70%). • Coefficient of temperature: O.lxaccuracy/ c ( < 18 °c or > 28 °C). • Allowable max voltage between terminal to be measured and ground: 1000V DC or 750V AC (valid value) •...
  • Page 20 4 2 2 AC • • Measuring range Resolution Accuracy ± ( 0.8% readings +3 digits ) lOmV 600V lOOmV ± ( 1 % readings + 10 digits ) 750V Input impedance:lOMn Maximal input voltage: lOOOVdc or 750Vac valid value Frequency response: 40Hz-lkHz True RMS 423F requency...
  • Page 21 4.2.5 Diode Functions Measu Testing conditions Resoluti range Forward current: approximately lmA· Open-circuit voltage: Diode test approximately 3.2V. 0-3V 0.001V display unit shows the approximate value of diode's forward voltage drop. Overload protection: DC/ AC 600V 4 2 6 B eeper continuity •...

  • Page 24: General Maintenance

    5.1 General maintenance To avoid any electric shock or damage to the meter, do not attempt to clean the inside of the meter. You must remove the line connecting a test lead to input signals, before enin the case or batte cover.
  • Page 26 EMC&LVD...

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