The AEMC 3945-B PowerPad three-phase, true RMS digital multimeter (also known as a multitester) measures voltage, current, and frequency for use in energy metering, measuring transformer K-factor, and troubleshooting electrical problems in power systems. The meter captures transients at 62.5 microseconds per sample. Measurements are displayed graphically using color-coded waveforms and numerically, and include kW, kVAR, PF, DPF, kWh, KVARh, kVAh, K-factor, and flicker. The meter captures voltage, current, power harmonics, transients down to 1/256th of a cycle, events, and screen captures. The meter has a 4MB internal data partition for recording and storing snapshots, transients, alarms, and trends. Data can be transferred to a computer using the RS-232 cable (included) and analyzed using the DataView software (included). The kit includes three color-coded current probes with 10' leads, four 10' color-coded voltage leads, four color-coded alligator clips, an RS-232 optically-coupled serial cable, DataView software, a NiMH rechargeable battery, a 120V US-style power cord, a carrying case, a soft carrying pouch, and instructions.
This true RMS (root mean square) meter provides accurate readings when measuring linear loads, such as standard induction motors and incandescent lights, where the current or voltage has an undistorted waveform, or nonlinear loads, such as electronic devices or motors, where the current or voltage has a distorted waveform. The meter is auto-ranging and automatically selects the correct operating range for the property being measured. The LCD captures and displays real-time measurements including voltage, current, and power harmonics (including direction) to the 50th order, and a screen snapshot function captures waveforms or other on-screen information. The meter meets International Electrotechnical Commission (IEC) safety standard 61010 and is certified for Category III installations up to 600V, which covers items used with enclosed building circuit installations (such as service panel parts, branch circuits, and fixed installations that are connected directly to a building's AC power supply), Category IV installations up to 600V, which covers equipment at the origin of the installation (such as electricity meters and primary over-current protection equipment), and Pollution Degree 2 for indoor use.
|Sampling frequency||256 samples/cycle|
|Voltage (TRMS)||Phase-to-Phase: 960V|
|Current (TRMS)||MN Clamp: 5mA to 6 amp/1 to 120 amp|
MR clamp: 10 to 1000 amp AC, 10 to 1,400 amp DC
SR clamp: 3 to 1,200 amp
MiniFlex: 10 to 1000 amp
AmpFlex: 10 to 6500 amp
|Frequency (Hz)||40 to 69Hz|
|Harmonics||1st to 50th, Direction, Sequence|
|Other measurements||kW, kVAR, PF, DPF, kWh, KVARh, kVAh, K-Factor, Flicker|
|Data storage||4MB partitioned for snapshot, transients, alarms, and trend recording|
|Communication port||Optically-coupled RS-232|
|Power supply||9.6V NiMH rechargeable battery pack, 110/230VAC + or - 20%, 50/60Hz|
|Safety ratings||International Electrotechnical Commission (IEC) safety standard 61010 and is certified for Category III installations up to 600V, Category IV installations up to 600V, and Pollution Degree 2 for indoor use|
|Dimensions||9.5 x 7 x 2 inches/240 x 180 x 55mm (H x W x D)|
H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.
Multimeters are electrical test meters that measure multiple properties of an electrical circuit, such as current, voltage, resistance, capacitance, and continuity. Available in handheld or benchtop models, multimeters diagnose electrical problems in electrical equipment, wiring, and power supplies. A variety of probes, clamps, and leads can be used to connect the meter to a circuit or device. Multimeters display information either in analog or digital form. Factors that influence meter choice include the electrical properties to be measured, the anticipated range of results, and the desired level of protection against transient voltage. Safety ratings are based on International Electrotechnical Commission (IEC) standards for low-voltage test equipment. IEC 61010 delineates four overvoltage installation categories. In general, a meter with a category IV rating will provide more protection against transient voltages than a meter with a lower category rating.
AEMC Instruments manufactures electrical testing and measurement instruments, including clamp meters, power quality analyzers, ground resistance testers, and data loggers. The company, founded in 1893, is headquartered in Foxborough, MA.