The Greenlee DM-830A Digital Multimeters is a hand-held testing devices with the following measurement capabilities: AC and DC voltage, AC and DC current, frequency, resistance, capacitance, and duty cycle of logic level signals. They also check diodes and verify continuity. All meters feature true RMS AC measurements, a relative zero mode, data hold mode, and an intelligent automatic power off. An optional optically isolated computer interface with software facilitates the recording of readings from the meter to a computer.
The DM-830A multimeters have the following additional capabilities: temperature (K-type thermocouples only); conductance; a crest function, which captures voltage or current signal peaks; and a recording function, which stores the maximum, minimum, and difference (maximum-minimum) input readings. The DM-830A record function can also calculate the average reading. These two models also have non-contact and single-probe voltage detection.
The DM-830A multimeters have an AutoCheck™ function for automatic selection of AC voltage, DC voltage, and resistance with low input impedance to mask “ghost” voltages. The multimeter features a T1-T2 function, which can measure and display two temperatures and calculate the difference. They also feature AC + DC true RMS measurement capability. The DM-830A has a dBm function with selectable reference impedances.
Measures voltage, current, resistance, capacitance and frequency
Tests continuity and diodes
Backlit LCD With Dual 10,000 Count Displays
BeepJack warns when test leads are incorrectly inserted in current measurement terminals
Automatic and manual range selection
Relative offset mode to see changes in measurements
Use optional USB interface DMSC-9U for direct-to-PC logging
Lifetime Limited Warranty
AC+DC True RMS gives accurate readings on complex waveforms
Low impedance AutoCheck mode - automatically selects AC or DC volts, resistance or continuity. Low impedance masks ghost voltage pickup
dBm function with 20 selectable reference impedance values
Crest capture (peak hold)plus recording of max, min, max-min and average
Two voltage detection modes - non-contact or using a single test lead
Two temperature measurements using type K thermocouples
Amperage Measurement: 600, 6000μA; 60, 600mA; 6, 10A
Conductance: 99.99 nS
Measurement Category: CAT IV, 1000 V
Founded in 1862, Greenlee Tools got its start as a toolmaker when two brothers needed to manufacture their invention (a special drill surrounded by chisels). With the success of this effort, the Greenlee brothers quickly took on making other woodworking tools and other machinery including a machine that laid track for the railroad. In the mid-80s and beyond, Greenlee added on other toolmakers and diversified the kinds of tools they make and now Greenlee manufactures tools used by tradesmen in all vocations from communications to hydraulic pumps, plumbing, telecom, test equipment and many more. Greenlee is widely recognized as an industry leader for quality hand and industrial tools.