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User's Guide
The Industrial Multimeter

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Summary of Contents for CEM DT-6505

  • Page 1 User's Guide The Industrial Multimeter...
  • Page 3 Introduction This meter measures AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency (electrical & electronic), Duty Cycle, Diode Test,Insulation Test, and Continuity plus Thermocouple Temperature. It can store and recall data. It features a waterproof, rugged design for heavy duty use. Proper use and care of this meter will provide many years of reliable service.
  • Page 4: Overvoltage Category

    OVERVOLTAGE CATEGORY I Equipment of OVERVOLTAGE CATEGORY I is equipment for connection to circuits in which measures are taken to limit the transient overvoltages to an appropriate low level. Note – Examples include protected electronic circuits. OVERVOLTAGE CATEGORY II Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equipment to be supplied from the fixed installation.
  • Page 5 Input Protection Limits Function Maximum Input V DC or V AC 1000VDC/AC rms mA AC/DC 500mA 1000V fast acting fuse 10A 1000V fast acting fuse (20A A AC/DC for 30 seconds max every 15 minutes) Frequency, Resistance, Cap acitance, Duty Cycle, Diode T 1000VDC/AC rms est, Continuity Temperature...
  • Page 6 Controls and Jacks mA, µA , temp ,INS and Rlow input jacks 2. 10A input jacks 3. 50,000 count LCD display STORE(VIEW) button 5. TIME/PI/DAR(RANGE/DOWN) button 6. MODE(BLUE) button 7. INSULATION TEST button 8. INSULATION LOCK button COM input jack 10.
  • Page 7 Symbols and Annunciators •))) 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 PEAK Peak Hold  Hertz (frequency) Volts Percent (duty ratio) Relative...
  • Page 8: 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 9: Ac Voltage (Frequency, Duty Cycle) Measurements

    AC VOLTAGE (FREQUENCY, DUTY CYCLE) 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 10: Mv Voltage Measurements

    MV VOLTAGE MEASUREMENTS CAUTION: Do not measure mV voltages if a motor on the circuit is being switched ON or OFF. Large voltage surges may occur that can damage the meter. 1. Set the function switch to the mV position. 2.
  • Page 11: Dc Current Measurements

    DC CURRENT MEASUREMENTS CAUTION: Do not make 20A 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 12: Ac Current (Frequency, Duty Cycle) Measurements

    AC CURRENT (FREQUENCY, DUTY CYCLE) MEASUREMENTS CAUTION: Do not make 20A current measurements for longer than 30 seconds. Exceeding 30 seconds may cause damage to the meter and/or the test leads. Insert the black test lead banana plug into the negative COM jack. For current measurements up to 5000µA AC, set the function switch to the yellow µA position and insert the red test lead...
  • Page 13: 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. 1. Set the function switch to the position. 2. Insert the black test lead banana plug into the negative COM jack.
  • Page 14: Diode Test

    DIODE TEST 1. Set the function switch to the green Ω CAP position. 2. Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive V jack. 3. Press the MODE button to indicate“ “...
  • Page 15: 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.
  • Page 16: Insulation Resistance Measurements

    INSULATION RESISTANCE MEASUREMENTS a) Set the rotary function switch to the INSULATION position, and Press t he RANGE button to chose one of the voltage which display on the left . b)Connect two testing lines to the tested; c)Push down and hold the “TEST” button /or press the “ LOCK” key stoke first and then the “TEST”...
  • Page 17 MOTORS AC-Disconnect the motor from the line by disconnecting the wires at the motor terminals or by opening the main switch. If the main switch is used and the motor also has a starter then the starter must be held, by some means, in the “ON”...
  • Page 18 CABLES Disconnect the cable from the line. Also disconnect opposite end to avoid errors due to leakage from other equipment. Check each conductor to gr ound and /or lead sheath by connecting one megohmmeter lead to a grou nd and /or lead sheather and the other megohmmeter lead to each of the conductors in turn.
  • Page 19: 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 20 Display Backlight Press the button to turn the backlight on or off. The backlight will automatically turn off after 30 SECONDS. Press and hold the button to switch backlight mode. HOLD The hold function freezes the reading in the display. Press the HOLD key momentarily to activate or to exit the HOLD function.
  • Page 21: Low Battery Indication

    one data. IN TIME SET function,press the button once can increase the recordin g interval,press the button once can decrease the recording interval. IN auto LOG function,press the STORE/VIEW button once can active au to LOG function,at the same time,”LOG A”flashes,press it once again to s top auto log.
  • Page 22: Battery Installation

    5. USE ONLY FRESH BATTERIES OF THE RECOMMENDED SIZE AND TYPE. Remove old or weak batteries so they do not leak and damage the unit. 6. IF THE METER IS TO BE STORED FOR A LONG PERIOD OF TIME, the batteries should be removed to prevent damage to the unit. BATTERY INSTALLATION WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the battery cover.
  • Page 23: Replacing The Fuses

    REPLACING THE FUSES WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the meter cover. 1. Disconnect the test leads from the meter. 2. Remove the protective rubber holster. 3. Remove the battery cover (two “B” screws) and the battery. 4.
  • Page 24: Specifications

    Specifications Function Range Resolution Accuracy DC Voltage 500mV 0.01mV 0.0001V  (0.1% reading + 4digits) 0.001V 500V 0.01V 1000V 0.1V AC Voltage 500mV 0.01mV 0.0001V  (1.0% reading + 5digits) to1000Hz 0.001V 500V 0.01V 1000V 0.1V All AC voltage ranges are specified from 5% of range to 100% of range DC Current 500A 0.01A...
  • Page 25 AC switch according to the calibration of sine wave. It generally increase (2% reading + 2% full scale) if non sine wave in the wave crest less than 3.0. Function Range Resolution Accuracy Resistance 500 0.01  (1% reading + 9 digits) 5k...
  • Page 26 (type-K) -58 to 2192F 0.1F (1.0% reading +4.5°F) (probe accuracy not included) Meg OHMS Test Current Terminal Vo Range Resolution Accuracy ltage Ω Ω 1mA @load50 0.050~5.000 M 0.001M +(2%+10) kΩ (0%~+10%) Ω Ω 5.000~50.00 M 0.01M +(2%+10) Ω Ω 50.00~500.0 M 0.1M +(4%+5)
  • Page 27 LOW OHM 分辩率 精确度 开路电压 过载保护 测量范围 0.000~5.000Ω 0.001Ω +(1.5%+30) 5.0+1V 250Vrms 5.00~50.00Ω 0.01Ω +(2.0%+5) 50.0 ~500.0Ω 0.1Ω +(2.5%+5) 500 ~2000Ω 1Ω +(3.0%+5) Note: Accuracy specifications consist of two elements:  (% reading) – This is the accuracy of the measurement circuit. ...
  • Page 28 Enclosure Double molded, waterproof Shock (Drop Test) 3.2 feet (1 meters) Diode Test Test current of 0.9mA maximum, open circuit voltage 2.8V DC typical Continuity Check Audible signal will sound if the resistance is less than 50 (approx.), test current <0.35mA PEAK Captures peaks >1ms Temperature Sensor...
  • Page 29 Fuses mA, µA ranges; 0.5A/1000V ceramic fast blow A range; 10A/1000V ceramic fast blow Operating Temperature 41ºF to 104ºF (5ºC to 40ºC) Storage Temperature F to 140 F (-20 C to 60 Operating Humidity Max 80% up to 87ºF (31ºC) decreasing linearly to 50% at 104ºF (40ºC) Storage Humidity <80%...

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