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ennoLogic eM860T True RMS User Manual

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eM860T True RMS Multimeter
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Summary of Contents for ennoLogic eM860T True RMS

  • Page 1 True RMS Multimeter User Manual...
  • Page 2 Version 1.4. Revised 3/19/2015. © 2015 ennoLogic™. All rights reserved. http://ennologic.com...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS 1. GENERAL INSTRUCTIONS ..........1 1.1 Precautionary Safety Measures .......... 1 1.1.1 Preliminary ............... 2 1.1.2 During Use ............... 4 1.2 Battery Installation or Replacement ........7 1.3 Symbols ................9 1.4 Instructions ................. 9 2. INSTRUMENT DESCRIPTION ........... 11 2.1 Main User Elements ............
  • Page 4 3. FUNCTION DESCRIPTION ..........17 3.1 General Functions ............. 17 3.1.1 DATA HOLD mode ..........17 3.1.2 Manual ranging and Autorange mode ....17 3.1.3 Battery Saver ............18 3.1.4 Relative Measurement Mode ....... 19 3.1.5 TRUE RMS Measurement ........19 3.2 Measurement Functions ...........
  • Page 5 4.1 General specifications ............39 4.2 Measurement Specifications ..........40 4.2.1 Voltage ..............40 4.2.2 Frequency ............... 42 4.2.3 Resistance ............... 42 4.2.4 Diode Test .............. 43 4.2.5 Continuity Check ..........43 4.2.6 Capacitance ............43 4.2.7 Temperature ............44 4.2.8 Current ..............

  • Page 7: General Instructions

    By using the eM860T you agree to hold ennoLogic™ and Cascadia Innovations harmless for any and all consequences of the use of this product or application of data from the use of...

  • Page 8: Preliminary

    1.1.1 Preliminary As the possibilities of high transient over-voltages occurring in today’s power systems increase, more stringent safety standards are set for electrical test equipment. Transients on electrical systems (power grid, feeder or branch circuits) will trigger a series of incidents that may result in serious personal injury.
  • Page 9 • Appliance, portable tools, and other household and similar loads. • Outlet and long branch Single-phase circuits. receptacle CAT II • Outlets at more than 10 connected meters (30 feet) from CAT loads III source. • Outlets at more that 20 meters (60 feet) from CAT IV source.

  • Page 10: During Use

    • Refers to the “origin of installation”; i.e., where low-voltage connection is made to utility power. • Electricity meters, primary overcurrent Three-phase at protection equipment. utility • Outside and service CAT VI connection, entrance, service drop any outdoor from pole to building, conductors run between meter and panel.
  • Page 11 • If the meter is used near noise generating equipment, be aware that display may become unstable or indicate large errors. • Do not use the meter or test leads if they look damaged. • Use the meter only as specified in this manual; otherwise, the protection provided by the meter may be impaired.
  • Page 12 • When using the probes, keep your fingers behind the finger guards. • When making connections, connect the common test lead before connecting the live test lead; when disconnecting, disconnect the live test lead before disconnecting the common test lead. •...

  • Page 13: Battery Installation Or Replacement

    • Use just one 6F22 battery, properly installed in the Meter's battery case, to power the Meter. • Replace the battery as soon as the battery indicator ) appears. A low battery might produce false readings that can lead to electric shock and personal injury.
  • Page 14 1. Set rotary switch to the OFF position. 2. Disconnect test leads and/or any connectors from the terminals. 3. Remove the red protective rubber casing by carefully peeling it away from the black plastic enclosure. 4. Use a screwdriver to unscrew the two screws on the battery cover, on the back of the unit near the bottom.

  • Page 15: Symbols

    1.3 Symbols Symbols used in this manual and on the instrument: Caution: refer to the instruction manual. Incorrect use may result in damage to the device or its components. AC (Alternating Current) DC (Direct Current) AC or DC Earth ground Double insulated Fuse Conforms to European Union directives...
  • Page 16 not charged with static electricity, which may destroy internal components. • Any adjustment, maintenance or repair work carried out on the meter while it is live should be carried out only by appropriately qualified personnel, after having taken into account the instructions in this manual. •...

  • Page 17: Instrument Description

    2. INSTRUMENT DESCRIPTION 2.1 Main User Elements The front panel is shown in Figure 2-1, and its user elements are described below: ① LCD display: Used for displaying measurement results and various symbols. ② Keypad: Measurement function keys. ③ Rotary switch: Used for selecting measurement functions.
  • Page 18 Figure 2-1: Meter Front Panel...

  • Page 19: Lcd Display

    2.2 LCD Display Figure 2-2: LCD Display The LCD screen is shown in Figure 2-2 above, and the meanings of the symbols are explained in Table 1 below: Meaning Symbol Indicates negative readings Indicator for AC voltage or current...
  • Page 20 Indicator for DC voltage or current The meter is in the Autorange mode in which the meter AUTO automatically selects the range with the best resolution. No-contact AC Voltage detect The meter is in Data Hold mode. The meter is in Relative Measurement mode.

  • Page 21: Keypad

    2.3 Keypad 2.3.1 SELECT Change to the second function: 1. In the Ω Ω Ω Ω position Switches between Resistance measurement, Diode Test and Continuity Check. 2. In the A mA µ µ µ µ A position Switches between DC and AC current. 3.

  • Page 22: Rel

    2. Press RANGE to step through the ranges available for the selected function. 3. Press and hold RANGE for 2 seconds to return to autoranging. 2.3.4 REL△ Press REL△ △ △ △ to enter and exit the Relative measurement mode. (Except Hz/Duty) 2.3.5 Hz % At V~, A, mA and µA.

  • Page 23: Function Description

    4. Press and hold for two seconds and the meter will return to the normal measurement state. (Except Hz/Duty and Capacitance) 3. FUNCTION DESCRIPTION 3.1 General Functions 3.1.1 DATA HOLD mode Data Hold mode causes the meter to stop updating the display.

  • Page 24: Battery Saver

    • In autorange mode, the Meter selects the best range for the input detected. This allows you to switch test points without having to reset the range. • In manual ranging mode, you select the range. This allows you to override autorange and lock the meter into a specific range.

  • Page 25: Relative Measurement Mode

    Press the key or rotate the rotary switch to wake the meter up. To disable Sleep mode, hold down the SELECT key while turning the meter on. 3.1.4 Relative Measurement Mode The Meter will display relative measurements in all functions except frequency. To enter and exit the relative measurement mode: 1.

  • Page 26: Measurement Functions

    3.2 Measurement Functions 3.2.1 AC and DC Voltage measurement To avoid electrical shock and/or damage to the instrument, do not attempt to take any voltage measurements that might exceed 1000Vdc or 1000Vac rms. To avoid electrical shock and/or damage to the instrument, do not apply more than 1000Vdc or 1000Vac rms between the common terminal and the earth ground.
  • Page 27 For better accuracy when measuring the DC offset of an AC voltage, measure the AC voltage first. Note the AC voltage range, then manually select a DC voltage range equal to or higher than the AC range. This improves the accuracy of the DC measurement by ensuring that the input protection circuits are not activated.
  • Page 28 Figure 3-1b: Measuring DC Voltage...

  • Page 29: Resistance Measurement

    3.2.2 Resistance Measurement To avoid electrical shock and/or damage to the instrument, disconnect circuit power and discharge all high-voltage capacitors before measuring resistance. The Meter's resistance ranges are 600.0Ω, 6.000kΩ, 60.00kΩ, 600.0kΩ, 6.000MΩ and 60.00MΩ. To measure resistance, set up the Meter as shown in Figure 3-2: 1.
  • Page 30 causing them to conduct. To avoid this, do not use the 60MΩ range for in-circuit resistance measurements. • In the 60MΩ range, the meter’s display may take a few seconds to stabilize. This is normal for high resistance measurements. • When the input is not connected, i.e. open circuit, the symbol "OL"...
  • Page 31 Figure 3-2: Measuring Resistance...

  • Page 32: Capacitance Measurement

    3.2.3 Capacitance Measurement To avoid electrical shock and/or damage to the instrument, disconnect circuit power and discharge all high-voltage capacitors before measuring capacitance. Use the DC voltage function to confirm that the capacitor is discharged. The Meter's capacitance ranges are 6.000nF, 60.00nF, 600.0nF, 6.000µF, 60.00µF, 600.0µF, 6.000mF, 60.00mF.
  • Page 33 Figure 3-3: Measuring Capacitance...

  • Page 34: Continuity Check

    3.2.4 Continuity Check To avoid electrical shock and/or damage to the instrument, disconnect circuit power and discharge all high-voltage capacitors before testing for Continuity. To test for continuity, set up the Meter as shown in Figure 3-4: 1. Set the rotary switch to 2.
  • Page 35 Figure 3-4a: Checking Continuity - Short...
  • Page 36 Figure 3-4b: Checking Continuity - Open...

  • Page 37: Diode Test

    3.2.5 Diode Test To avoid electrical shock and/or damage to the instrument, disconnect circuit power and discharge all high-voltage capacitors before testing diodes. To test a diode outside of a circuit, set up the Meter as shown in Figure 3-3: 1.
  • Page 38 Figure 3-5a: Diode Test - Forward Bias...
  • Page 39 Figure 3-5b: Diode Test - Reverse Bias...

  • Page 40: Frequency And Duty Cycle Measurement

    3.2.6 Frequency and Duty Cycle Measurement Do not measure Frequency on high voltage (>1000V) circuits to avoid electrical shock hazard and/or damage to the instrument. The Meter can measure Frequency or Duty Cycle while making either an AC Voltage or AC Current measurement. To measure Frequency or Duty Cycle: 1.

  • Page 41: Temperature Measurement

    3.2.7 Temperature Measurement To avoid electrical shock and/or damage to the instrument, do not apply more than 250VDC or 220VAC rms between the °C terminal and the COM terminal. To avoid electrical shock, do not use this instrument when voltages at the measurement surface exceed 60VDC or 24V rms.

  • Page 42: Current Measurement

    3.2.8 Current Measurement To avoid damage to the Meter or injury if the fuse blows, never attempt an in-circuit current measurement where the open-circuit potential to earth is greater than 1000V. To avoid damage to the meter, check the meter's fuse before proceeding.
  • Page 43 6. Connect or touch the black probe to the negative side of the break and connect or touch the red probe to the positive side of the break. (Reversing the leads will give a negative reading, but will not damage the Meter.) 7.

  • Page 44: Ncv (Non-Contact Voltage Detect)

    Figure 3-6: Measuring Current 3.2.9 NCV (Non-Contact Voltage Detect) Set the rotary switch to the /ACV mode. Press the SELECT key to switch to NCV detect mode. Hold the EF- DETECT AREA at the top of the Meter close to the AC power cable or power socket.

  • Page 45: Technical Specifications

    present, the Buzzer warning will sound, and one or more bar symbols “-“ will be displayed on the LCD. The lowest detectable voltage is around 50V, 50/60Hz. The LCD will display EF, when detecting the AC voltage signal. The LCD display may indicate between one and four bars, from weak to strong (‘...

  • Page 46: Measurement Specifications

    • Display: 3 5/6 digits LCD display. Automatic indication of functions and symbols. • Range selection: automatic and manual. • Over Range indication: LCD will display "OL". • Low battery indication: The " " is displayed when battery power is too low to guarantee proper operation. •...
  • Page 47 10mV ±(0.8% of rdg +5 digits) 600V 100mV 1000V ±(1.0% of rdg +2 digits) ACV: Range Resolution Accuracy 600mV 0.1mV ±(1.0% of rdg + 5 digits) 10mV 600V 100mV 750V ±(1.5% of rdg + 5 digits) Above accuracies can be guaranteed within 5%~100% of the full range.

  • Page 48: Frequency

    4.2.2 Frequency Logic frequency (1Hz-1MHz) Range Resolution Accuracy 99.99Hz 0.01 Hz 999.9Hz 0.1 Hz 9.999kHz 0.001kHz ±(0.1% of rdg+3digits) 99.99kHz 0.01kHz 999.9kHz 0.1kHz Linear frequency (6HZ~10KHZ) Range Resolution Accuracy 99.99Hz 0.01 Hz 999.9Hz 0.1 Hz ±(0.05% of rdg+8digits) 9.999kHz 0.001kHz Above accuracies can be guaranteed within 10%~100% of the full range.

  • Page 49: Diode Test

    6.000MΩ 1kΩ 60.00MΩ 10kΩ ±(1.5% of rdg+5 digits) 4.2.4 Diode Test Range Resolution Test Condition Forward Bias DC current approximately 1mA. 0.001V Reverse Bias DC voltage approximately 1.5V. 4.2.5 Continuity Check Range Resolution Test Condition 600Ω 0.1Ω Open circuit voltage: approx.

  • Page 50: Temperature

    600µF 100nF 1µF ±(5.0% of rdg +20 digits) 4.2.7 Temperature Range Resolution Accuracy -200~0℃ ±(5.0% of rdg + 4°C) 0~400℃ 1°C ±(2.0% of rdg+ 3°C) 400~1200℃ ±(2.0% of rdg+ 2°C) Note: The temperature specifications do not include thermocouple errors. 4.2.8 Current DCA: Range Resolution...

  • Page 51: Maintenance

    60mA 0.01mA ±(1.8% of rdg+5 digits) 600mA 0.1mA ±(3.0% of rdg+8 digits) 10mA Above accuracies can be guaranteed within 5%~100% of the full range. The true RMS meter has residual values within 10 counts when the test leads are shortened, but that will not affect the accuracy of measurement.

  • Page 52: General Maintenance

    5.1 General Maintenance To avoid electrical shock or damage to the meter, do not get water inside the case. Remove the test leads and any input signals before opening the case Periodically wipe the case with a damp cloth and mild detergent.

  • Page 53: Accessories

    1. Set rotary switch to the OFF position. 2. Disconnect test leads and/or any connectors from the terminals. 3. Use a screwdriver to unlock the four screws on the rear cover. 4. Remove the rear cover from the meter. 5. Remove the fuse by gently prying one end loose, then slide the fuse out of its bracket.
  • Page 56 PO Box 25207 Eugene, OR 97402...

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