05 | Keysight | U1280 Series Handheld Digital Multimeters - Data Sheet

Figure 6. Data logging experience with Keysight Meter Logger software

Figure 5. Hold & Export button—one press for three actions: Measure, save it

into handheld DMM’s memory and send the measurement out via infrared port.

Optional U5404A remote switch probe emulates ‘Hold & Export’ button.

Figure 7. Pair up the U1280 series with Keysight Remote Link solution for

wireless measurement option

Manual logging made easy with Hold & Export

button

While data logging over a period of time is useful to capture

measurements for further observations and analysis, manual data

log is just as useful to conveniently record measurements and

reduce human error occurrence from conventional manual data

entering process. Better yet, users are able to store measurement

readings into the handheld DMM’s internal memory and at the

same time export the measurements to the Keysight Meter

Logger software or Keysight Remote Link solution via the DMM’s

infrared port — all of these by simply pressing the ‘Hold & Export’

button. When the situation requires users to concentrate on

probing, the optional U5404A remote switch probe can be used

to perform manual logging by emulating the ‘Hold & Export’

button of the U1280 Series handheld DMMs.

Built-in low pass filter

Today, three-phase AC electric motors are the most important

workhorses in industry and commercial facilities. With the advent

of solid state electronics, variable speed drives (VFD) are used to

regulate the speed of three-phase AC motors to increase the effi-

ciency of AC motors. However, the increased use of VFDs present

challenges to technicians in getting accurate voltage, current

and frequency measurements that match with readings shown on

the VFD’s control panel display. Many true RMS DMMs that have

high AC bandwidth are measuring VFD signals up to 20% to 30%

higher than the drive’s controller display due to the reason that

DMMs are measuring the carrier frequency/switching frequency

generated by VFDs. Keysight U1280 Series comes with LPF (low

pass filter) feature which blocks unwanted high frequency signal

from VFDs’ switching components. The net result is an accurate

measurement of VFD’s output signal which helps to expedite the

maintenance or troubleshooting tasks of VFDs.

Programmable

Keysight U1280 Series comes with programmability capability that

allows avid programmer to create computer programs to control

the handheld DMM. The programmability of Keysight U1280

Series allows users to automate Keysight U1280 Series or even

integrate into bigger test systems.