Answer / sam

Instrumentation is all about measurement and control of
industrial processes like flow, pressure, level, density,
viscosity and so on. This is done with various sensors in
the plant that are calibrated by instrument technicians
according to the relevant process or application. The
readings of these sensors are then send to a central control
room via a world standard 4 to 20 mA signal and 24VDC, where
a monitoring supervisory system displays the information on
a computer screen. Control room operators interact with
these computer screens and stop and start pumps in the field
by clicking with the mouse on a small drawing on the screen
of the relevant pump. How this is done is with SCADA or DCS
software normally programmed by the instrument technician as
well. Instrumentation consists of only two sections, the
field side and the software side. Most instrumentation
technicians can do both.
Electrical work is done by a electrician and is all about
main power supply and distribution to the complete plant
either by using power from the main grit or local power
generators on the plant. Normally instrument technicians
will work on up to maximum 110VAC, a electrician can work
on any kind of power low or high. Only qualified high
voltage electricians are allowed to do high voltage
switching since this can be very dangerous to to.

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