Jensen DT-985 Manual
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Jensen DT-985 Manual

Jensen DT-985 Manual

Trms multimeter
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DT-985
TRMS MULTIMETER

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Summary of Contents for Jensen DT-985

  • Page 1 DT-985 TRMS MULTIMETER...
  • Page 2 Introduction This meter measures AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency (electrical & electronic), Diode Test, and Continuity plus Thermocouple Temperature. It features a waterproof, rugged design for heavy duty use. Proper use and care of this meter will provide many years of reliable service. Safety 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...

  • Page 3: Safety Instructions

    SAFETY INSTRUCTIONS This meter has been designed for safe use, but must be operated with caution. The rules listed below must be carefully followed for safe operation. NEVER apply voltage or current to the meter that exceeds the specified maximum: Input Protection Limits Function Maximum Input...
  • Page 4 Controls and Jacks 6,000 counts LCD Negativity display MAX/MIN button RANGE button Mode button Function switch mA, µA and 10A input jacks COM input jack Positive input jack HOLD and Backlight button 10. Hz and % button 11. RELATIVE button 12.
  • Page 5 Symbols and Annunciators Auto power off •))) Continuity Diode test Battery status nano (10 ) (capacitance) µ micro (10 ) (amps, cap) milli (10 ) (volts, amps) Amps kilo (10 ) (ohms) Farads (capacitance) mega (10 ) (ohms)  Ohms Hz Hertz (frequency) Volts Percent (duty ratio)

  • Page 6: Dc Voltage Measurements

    Operating Instructions WARNING: Risk of electrocution. High-voltage circuits, both AC and DC, are very dangerous and should be measured with great care. 1. ALWAYS turn the function switch to the OFF position when the meter is not in use. 2. If “OL” appears in the display during a measurement, the value exceeds the range you have selected.

  • Page 7: Dc Current Measurements

    DC CURRENT MEASUREMENTS CAUTION: Do not make 10A current measurements for longer than 30 seconds. Exceeding 30 seconds may cause damage to the meter and/or the test leads. 1. Insert the black test lead banana plug into the negative COM jack. 2.

  • Page 8: Resistance Measurements

    RESISTANCE MEASUREMENTS WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all capacitors before taking any resistance measurements. Remove the batteries and unplug the line cords. Set the function switch to the green ΩCAP position. Insert the black test lead banana plug into the negative COM jack.

  • Page 9: Temperature Measurements

    TEMPERATURE MEASUREMENTS 1. Set the function switch to the green Temp position. 2. Insert the Temperature Probe into the input jacks, making sure to observe the correct polarity. 3. Press the MODE button to indicate ºF or ºC 4. Touch the Temperature Probe head to the part whose temperature you wish to measure. Keep the probe touching the part under test until the reading stabilizes (about 30 seconds).

  • Page 10: Autoranging/Manual Range Selection

    AUTORANGING/MANUAL RANGE SELECTION When the meter is first turned on, it automatically goes into Autoranging. 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.

  • Page 11: Maintenance

    Maintenance WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the back cover or the battery or fuse covers. WARNING: To avoid electric shock, do not operate your meter until the battery and fuse covers are in place and fastened securely.
  • Page 12 Specifications Function Range Resolutio Accuracy DC Voltage 600mV 0.1mV 0.001V (1.0% reading + 3 digits) 0.01V 600V 0.1V 1000V (1.0% reading + 5 digits) AC Voltage 45Hz to 60Hz 0.001V 0.01V (1.0% reading + 3 digits) 600V 0.1V 1000V (1.5% reading + 5 digits) All AC voltage ranges are specified from 5% of range to 100% of range DC Current 600A...
  • Page 13 Function Range Resolution Accuracy Resistance 600 0.1 6k 0.001k 60k 0.01k (1.5% reading + 5 digits) 600k 0.1k 6M 0.001M 60M 0.01M (5.0% reading + 20 digits) Capacitance 99.99nF* 0.01nF (4.5% reading + 20 digits) 999.9nF 0.1nF` (3.0% reading + 5 digits) 9.999F 0.001F 99.99F...
  • Page 14 Enclosure Double molded Shock (Drop Test) 6.5 feet (2 meters) Diode Test Test current of 1.5mA maximum, open circuit voltage 3V DC typical Continuity Check Audible signal will sound if the resistance is less than 50 (approx.), test current <0.35mA Temperature Sensor Requires type K thermocouple Input Impedance >10MΩ...

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