U1281A Datasheet, PDF (5/18 Pages) Keysight Technologies – U1280 Series Handheld Digital Multimeters

05 | Keysight | U1280 Series Handheld Digital Multimeters - Data Sheet
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.
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.
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.
Figure 6. Data logging experience with Keysight Meter Logger software
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.
Figure 7. Pair up the U1280 series with Keysight Remote Link solution for
wireless measurement option