MAXICAL
®
I
I
I
5511-229 GB/98.06/Rev. B1
5
2. Design and Areas of Application
MAXICAL
®
III is designed for measuring, calculating and
registering energy consumption in large heat installations with
water as the heat transferring agent.
Typical applications include main heat metering at CHP
(cogeneration heat and power) suppliers, heat metering through
transmission nets or exchange stations.
In addition to energy metering, MAXICAL
®
III has various other
functions including; display of prevailing and peak values, relay,
pulse and analogue outputs, tariff registering, and data com-
munication. All of which make it the most obvious choice for
industrial management and regulation applications.
Thermal energy is calculated on the basis of the differential
temperature measured across the flow and return pipes and the
volume of water. The value is automatically corrected for density
and enthalpy.
4-wire technique is used for measuring and adjusting the
temperature, ensuring optimal accuracy and reliability.
The flow meter input comprises galvanically connected stages,
which can supply electronic pick-ups. Galvanically isolated stages
are used for flow meters with active outputs up to 5 or 10 kHz.
All operating parameters can be programmed by means of the
optical eye on the front of the meter and a computer equipped with
a Windows software package which facilitates quick and simple
startup.
2.1. Display
MAXICAL
®
III is equipped with a liquid crystal display with 8
numerical digits plus 3 alphanumerical characters. 7 digits indi-
cate the current and accumulated values. The last three alphanu-
merical characters indicate the relevant unit of measurement or
symbol.
Once the integrator has been connected to the mains, a discreet
background lighting will appear in the display, ensuring that
readings are clearly visible - even in areas with poor lighting.
