Agilent Technologies U1270 Series Spezifikationen PDF herunterladen (Seite 7)

Advanced DMM Features

Data logging

The data logging feature makes it easy for factory maintenance personnel to

generate a range of troubleshooting, monitoring, and process documentation.

For example, the GUI data logger software can collect information on general

trends and develop an environmental profile of a factory. The data logger can

also collect data over an extended duration to support the installation or repair

of factory systems such as heating, ventilation, and air-conditioning (HVAC).

The GUI data logger provides a simple way of tabulating and plotting acquired

data for further data analysis. (Note: Not all the handheld DMMs on the market

are designed with data logging capability. For those DMMs that do support data

logging, the data logging software may not be free.)

Besides the basic multimeter measurement functions such as AC voltage,

DC voltage, AC current, DC current, resistance, continuity, and diodes check;

consider looking for a DMM that offers advanced capabilities to suit your appli-

cation needs. These advanced DMM functions save you time when performing

troubleshooting tasks. Here are some of the advanced capabilities designed to

ease the job of engineers and technicians.

LOW

(low impedance mode)

The Z

LOW

(low input impedance) function is designed to remove ghost or induced

voltages from measurements. This function works by presenting low impedance

across the leads to obtain a more accurate measurement. Z

LOW

reduces the

possibility of false readings in areas where the presence of ghost voltages are

suspected. These stray voltages are normally caused by capacitive coupling

between energized wiring and adjacent unused wiring.

Smart Ω (smart ohm)

Smart ohm (offset compensation) is another feature designed to remove

unexpected DC voltages within the instrument at the input, or at the circuit

being measured; where resistance measurement errors are introduced. Using

offset compensation, the DMM takes the difference between two resistance

measurements when two different test currents are applied and uses that data

to determine if there are any offset voltages in the input circuitry. The resultant

displayed measurement corrects this offset, giving a more accurate resistance

measurement. The bias voltage or leakage current is shown on the secondary

display.

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Agilent Technologies U1270 Series Spezifikationen Seite 7