Xylem HYDROVAR Smart - Manual (Page 23)

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7.10 Operation at the minimum frequency
CONFIG FMIN
f => fmin
If you have selected „f->0“ the frequency will go
down to the selected minimum frequency.
Then the inverter will keep running for the selected stop-delay time and after this time the
Hydrovar-Smart will stop automatically.
If the selection is „f->f
min
“ you can not run the pump below the set minimum frequency. In
the controller, actuator and multi controller mode the pump will never run below the set
minimum frequency (the pump will only stop with an external on/off-(terminals X1/4 and
X1/5) or in case of a failure.
Press ¾ on the Hydrovar-Smart to change to
7.11 Delay time for shut off at minimum frequency
STOP-DELAY FMIN
5 s
After running the pump for this selected time at
minimum frequency, the pump will stop, if parameter
CONFIG. FMIN is set to f ⇒ 0
Adjustable between 0 and 100s.
NOTICE!
Problems with shut off of the pump at 0 demand (too small or no pressure tank) can be
solved by using these settings!
Additional function: selectable delay time to start a full speed pump in case of “Simple
Multicontroller” mode.
Press ¾ on the Hydrovar-Smart to change to
7.12 Sensor – Adjust
SENSOR_ADJUST?
Out of range
Zero point adjustment of the transmitter
Depressurise the system and press buttons П + Р
simultaneously. After a successive adjustment, "adjusted" appears on the display.
If “out of range” is shown on the display, no adjustment is possible
Press ¾ on the Hydrovar-Smart to change to
7.13 Sensor - Curve
SENSOR-CURVE
Linear
Function of the input signal (4...20mA) of the
Hydrovar to the actual measured value.
Application:
linear: Pressure control, differential pressure control, level, temperature and flow control
(inductive or mechanical).
quadratic: Flow control by using an orifice plate together with a differential pressure
transmitter.
Press ¾ on the Hydrovar-Smart to change to