Download for troubleshooting current controlled loops

A new downloadable Application Note, from Fluke, explains how to use a
rugged, handheld Fluke 120 Series ScopeMeter, within the process industry,
to test, then troubleshoot, current controlled loops used to control
actuators and to monitor temperature, pressure, level and flow.

Fluke 123 and 124 ScopeMeters are integrated test tools, combining the three
most frequently used service tools: a dual input oscilloscope with 20MHz or
40MHz bandwidth, a true-rms multimeter and a ´paperless´ recorder in one
affordable, easy-to-use instrument.

When testing a current controlled loop, they allow the user to not only
provide a digital readout of the instantaneous current but also a graphical
display using the oscilloscope function. This graphical view, with the large
bandwidth, enables identification of any interference from low- or
high-frequency signals.

The 600V Category III safety-certified ScopeMeters also offer the
opportunity to take measurements over a prolonged time period. In the
TrendPlot mode, short-term interrupts can be readily spotted on-screen. On
the 124 model, the cursor and real-time clock further aid analysis of
recorded phenomena. The voltage across a suspect component can be checked
using the second channel of the ScopeMeter. The meter also acts as a basic
component tester, measuring resistance, capacitance and providing diode
test.

The company also offers a range of process calibration tools, including the
740 Series Documenting Process Calibrators and the 705/707 and 707EX Loop
Calibrators.

The Application Note ´Current controlled loop testing with the Fluke
ScopeMeter 120 Series´ can be downloaded from Fluke´s web site.