GOSSEN-METRAWATT GMBH 37
Heating circuit monitor
Function – Active / inactive configurable with the configuration digit "Alarms" (see Configuration)
–Without external transformer, without additional parameters
–Correct optimization of the control parameters tu and Pb I is a pre-condition!
i.e. before self-optimization is started, heating circuit monitoring must be activated.
The lower limit for the tu parameter must be maintained for manual optimization or subsequent adjustment of the control
parameters:
Pb I MBU
minimum tu =
•
50%
∆ϑ ⁄ ∆t
∆ϑ ⁄ ∆t = maximum temperature rise during start-up
–The error message LE is generated after approximately 2 times tu if the heater remains switched on 100 % and
the increase in temperature is too small
–The monitor is inactive, when
Controller type = limit monitor, positioner or step controller
During self-optimizing
With standard signal input (marking B2)
The limitation of the regulation ratio Y H < 20 %
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