User Manual M2x2/EN M/F
iSTAT M2x2
Page 21
8.3.7 Energy
Four
counters are available so that energy in each of the four quadrants can be measured.
The configuration of the four counters can be adapted to the customer's needs via the front
menu or via the remote communications link.
All four energy measurements may be viewed using either the M2x2 display or the remote
communications link.
8.3.8 Maximum demands (MDs)
The M2x2 provides maximum demand values using average Thermal Demand.
The M2x2 stores the maximum demand value since last reset. The unit also displays the
present or 'dynamic' maximum demand.
8.3.9 Thermal Average demands
Thermal demand will provide an exponential thermal characteristic, based on the bimetal
element principal. Maximum demand and the time of its occurrence are stored in the unit.
Maximal values and time of their occurrence are stored in M2x2. A time constant (t. c.) can
be set from 1 to 255 minutes and is 6−time thermal time constant (t..c. = 6 * thermal time
constant).
Example:
Mode: Thermal function
Time constant: 8 min.
Current MD and maximal MD: Reset at 0 min.
Thermal function
01234567891011121314151617181920
Time [min.]
Measured value
Present MD MD peak Input
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