Situation:A
major manufacturer of printed circuit boards is currently
expanding its operations. UNIMETER XQLs are being used
extensively for data logging, display and control in their
new electroplating plant.
One application is the Plating Line where NC drilled
and imaged PCBs are plated with copper and tin. Each of
the 7 baths uses different chemistry, therefore requiring
that the temperatures, tank levels and flow rates be
independently monitored and controlled. Temperature is
measured with the PT100 solid-state sensor. This
measurement drives a contactor with the use of one of the
two set points onboard the Unimeter XQL. With in-built
linearisation, the Unimeter can turn each tank heater on
or off around a set-point value. This can even be done
with hysteresis values set. The displayed result can be in
Fahrenheit or Celsius, and PID control can be easily
implemented with the Unimeter's auto-tune feature.
Scott Dowling (pictured), Electrical and Maintenance
Engineer said;
"The good thing about the Unimeter is it's ease
of use with RS485 and UniSoft V6 software, which gives
me easy logging capabilities and reprogramming for fine
tuning. It also means that I can standardize on the one
meter throughout the plant."
For more technical details, log on to www.unimeter.com
, and in the manual refer to Functions 41 to 56 for
Temperature Monitor, Function 190 and 191 for Flow Control
and Function 81, Process Monitor (4-20mA) for depth
measurement.
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