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PDi DM-918 Operating Instructions Manual

Autoranging
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DM-918
OPERATIONS MANUAL
AUTORANGING MULTIMETER

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Summary of Contents for PDi DM-918

  • Page 1 DM-918 OPERATIONS MANUAL AUTORANGING MULTIMETER...

  • Page 2: Safety Information

    SAFETY INFORMATION The following safety information must be observed to ensure maximum personal safety during the operation of this meter:  This meter is designed for use by trained and qualified professionals only.  Do not use the meter if the meter or test leads look damaged or if you suspect that the meter is not operating properly.

  • Page 3: Safety Symbols

    SAFETY SYMBOLS This symbol adjacent to another symbol, terminal or operating device indicates that the operator must refer to an explanation in the Operating Instructions to avoid personal injury or damage to the meter. This WARNING symbol indicates WARNING potentially hazardous situation which, if not avoided, could result in death or serious injury.

  • Page 4: Meter Description

    METER DESCRIPTION 1. 6,000 count Liquid Crystal Display with symbolic signs 2. Function Dial 3. Positive Input Jack 4. COM (negative) Input Jack 5. 10A (positive) Input Jack for Auto Power 10A DC or AC measurements 6. Measuring MODE selection button.

  • Page 5: Specifications

    SPECIFICATIONS The instrument complies with: EN61010-1. Insulation: Class 2, Double insulation. Overvoltage category: CATIII 600V. Display: 6000 counts LCD display with function indication. Polarity: Automatic, (-) negative polarity indication. Over range: “OL” mark indication. Low battery indication: The “ ” is displayed when the battery voltage drops below the operating level.
  • Page 6 DC Voltage (Autoranging) Range Resolution Accuracy 600.0mV 0.1mV ± 0.5% of rdg + 2 dgts 6.000V 60.00V 10mV ± 1.2% of rdg + 2 dgts 600.0V 100mV 600V ± 1.5% of rdg + 4 dgts Input Impedance: 10MΩ. Maximum Input: 600V DC or 600V AC RMS. AC Voltage (Autoranging except 600mV) Range Resolution...
  • Page 7 AC Current (Autoranging for A and mA) Range Resolution Accuracy ± 1.5% of rdg ± 5 dgts 600.0A 0.1A 6000A 1A 60.00mA ± 1.8% of rdg ± 5 dgts 10A 600.0mA 100A 10mA ± 3.0% of rdg ± 7 dgts Overload Protection: 0.8A / 250V and 10A / 250V Fuse.
  • Page 8 Input Protection: 250V DC or 250V AC RMS. Frequency (Autoranging) Range Resolution Accuracy 9.999Hz 0.001Hz ± 1.5% of rdg ± 5 dgts 99.99Hz 0.01Hz 999.9Hz 0.1Hz 9.999kHz ± 1.2% of rdg ± 3 dgts 99.99kHz 10Hz 999.9kHz 100Hz 9.999MHz 1kHz ±...

  • Page 9: Operation

    Diode Test Test current Resolution Accuracy 0.3mA typical 1 mV ± 10% of rdg ± 5 dgts Open circuit voltage: 2V DC typical Overload protection: 250V DC or AC RMS. Audible continuity Audible threshold: Less than 40 Test current: <0.3mA Overload protection: 250V DC or AC RMS.

  • Page 10: Range Button

    Diode/Continuity, °C /°F or Hz/duty To disable Auto Power Off, hold MODE button then turn on the DM-918. The Auto Power Off function will be cancelled. The “APO” icon will not appear in the upper right corner of LCD display. To enable Auto Power Off, turn DM-918 off and then back on.

  • Page 11: Max/Min Button

    operation. 3. To enable or disable the back light function, press and hold the HOLD button for 2 seconds. MAX/MIN BUTTON The meter displays the maximum or minimum value of input in the Max/Min mode. When Max/Min is pressed for the first time, the meter displays the maximum value.

  • Page 12: Ac Voltage Measurements

    before the value. AC VOLTAGE MEASUREMENTS WARNING: Risk of Electrocution. The probe tips may not be long enough to contact the live parts inside some 240V outlets for appliances because the contacts are recessed deep in the outlets. As a result, the reading may show 0 volts when the outlet actually has voltage on it.

  • Page 13: Ac Current Measurements

    1. Insert the black test lead banana plug into the negative (COM) jack. For current measurements up to 6000µA DC, set the function dial to the µA position and insert the red test lead into the positive A jack. 3. For current measurements up to 600mA DC, set the function dial to the mA range and insert the red test lead into the positive mA jack.

  • Page 14: Resistance Measurements

    1. Insert the black test lead into the negative (COM) jack. 2. For current measurements up to 6000µA AC, set the function dial to the µA position and insert the red test lead into the positive A jack. 3. For current measurements up to 600mA AC, set the function dial to the mA range and insert the red test lead into the positive mA jack.

  • Page 15: Capacitance Measurements

    under test so the rest of the circuit will not interfere with the resistance reading. 4. Read the resistance value on the display. The display will indicate the proper decimal point, value and symbol. CAPACITANCE MEASUREMENTS WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all capacitors before taking any capacitance measurements.

  • Page 16: Diode Test

    the red test lead into the positive (Ω) jack. Touch the test probe tips to the circuit or component under test If the resistance is less than approximately 40Ω a tone will sound. The display will also show the actual resistance.

  • Page 17: Temperature Measurements

    Insert the black test lead into the negative (COM) jack and the red test lead into the positive (Hz%) jack. Touch the test probe tips to the circuit under test. Read the frequency on the display. The digital reading will indicate the proper decimal point, symbols (Hz, kHz, MHz ) and value.

  • Page 18: Replacing The Battery

    REPLACING THE BATTERY WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the fuse/battery cover. 1. When the battery needs to be replaced will appear on the left-hand side of the LCD display. 2.

  • Page 19: Replacing The Fuses

    Warranty This PDI product is warrantied to be free from defects in materials and workmanship for a period of two (2) years from the verified date of purchase. During this warranty period, PDI will either repair or replace the defective unit, at PDI’s discretion.
  • Page 20 View full warranty details and register your PDI product at www.PDImeters.com. NOTE: Online product registration is required for all warranty claims. All warranty claims must have a Return Goods Authorization assigned from PDI, in order to begin processing. Contact PDI for more details.

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