User manual GREENLEE DM-100

[. . . ] Read and understand this material before operating or servicing this equipment. Failure to understand how to safely operate this tool can result in an accident causing serious injury or death. Electric shock hazard: Contact with live circuits can result in severe injury or death. ⷠUse test leads or accessories that are appropriate for the application. [. . . ] Unless measuring voltage, current, or frequency, shut off and lock out power. Using this unit near equipment that generates electromagnetic interference can result in unstable or inaccurate readings. Display Function Buttons Selector Hz VµA COM 10A 4-digit LCD and bar graph See explanations under Using the Features Selects a function or turns power OFF Positive input terminal for all measurements except 10 A current ( Hz on DM-110 only) Negative, common or ground input terminal for all measurements Positive input terminal for current measurements up to 10 A Note: Unidentified icons are not used on these models. Two AC measurement methods are average-responding RMS calibrated and true RMS-reading. The true RMS-reading method uses internal circuitry to read the true RMS value. This method is accurate, within the specified crest factor limitations, whether the input signal is a pure sine wave, a square wave, triangle wave, half wave or signal with harmonics. The ability to read true RMS provides much more measurement versatility. The Waveforms and Crest Factors table shows some typical AC signals and their RMS values. Select trigger levels when measuring frequency turn power back on after auto power off view the frequency while measuring AC voltage or current hold a measured value for all functions. Press again to return to normal mode While in the Hz mode, the RANGE button does not change the frequency range. Set the selector to the proper setting, press the unlabeled blue button to select the desired measurement, and connect the test leads to the meter. ⷠIf the unit does not function as expected on a known functioning circuit, replace the battery and/or fuse. ⷠIf the unit still does not function as expected, send the unit to Greenlee for repair. If the resolution is not satisfactory, remove the meter from the circuit and change to the next lower range if using manual ranging. Capacitance* (DM-110 only) Continuity** and press the BLUE button one time µA and press the BLUE button one time µA 10A and press the BLUE button one time 10A A Diode*** Frequency (DM-110 only) Resistance Voltage (AC) Voltage (DC) * ** *** and press the BLUE button two times Hz V and press the BLUE button one time V mV or V Discharge capacitor before measurement. Tone sounds if the measured resistance is less than approximately 30 . The meter defaults to automatically turn itself off after a period of inactivity from the user. The DM-100 turns off after 10 minutes, and the DM-110 turns off after 30 minutes. Note: When the meter is turned off and back on with the selector, the meter returns to the default. Accuracy is specified as follows: ± (a percentage of the reading + a fixed amount) at 23 °C ± 5 °C (73. [. . . ] Some examples include cables, meters, transformers, and other exterior equipment owned by the power utility. Failure to observe these precautions can result in injury and can damage the unit. Before opening the case, remove the test leads from the circuit and shut off the unit. When fuse replacement is necessary, see Specifications for the correct type, size, and capacity. [. . . ]