Zero Adjustment; Filter - Homa HSK15 Operating Manual

For example, for a HOMA LLS with measuring range of 2,5m - the value of 0250cm is entered.
Important information: If values for the measuring range < 0100cm are entered, then the control
inserts the minimum value of 100cm , in case of values >1000cm, the control inserts the maximum
value of 1000cm. If "3x float switches" has been selected and the unit is subsequently switched to a
single pump operation, then the control unit switches automatically back to the measurement type - 2x
float switches!
6.1.2

Zero adjustment

During level measurement it is of particular importance that zero point measurement be as exact as
possible in order to minimise the risk of the pumps running dry. In this menu, therefore, the zero point
of the level measurement can be exactly calibrated. Following remarks are to be observed:
During zero point calibration, the measuring device shall not be in the water, that is, the level sensor
must be pulled out of the water. A working level sensor is to be connected. If the internal impact
pressure sensor is used for measuring, the wet bell must be pulled out of water. Furthermore, it must
be guaranteed that the measurement system is absolutely still during the zero calibration process.
After preparations in this menu point – zero adjustment, the OK key must be pressed, select "YES"
using the - or -keys and confirm with the OK key. The automatic zero calibration is now initiated. In
second row of the display, the unit's calculated correction value appears after a short time, Zero
adjustment is herewith finished. This value is stored and is valid until the next zero adjustment is
carried out. Zero adjustment can be repeated at any time. Should the control be operated with float
switches, the zero adjustment menu will not be displayed.
6.1.3

Filter

In case of fluctuating water levels, level indication may fluctuate as well. This can be compensated by
means of a low-pass filter and a more inert level registration can be adjusted.
0000 = Filter OFF
0001 = weaker (faster) Filter ... 9999 stronger (slower) Filter
If the control unit is operated with a float switch, the filter menu will not appear.
HSK_operating_manual_English_Ver3.doc
HOMA Pump Technology - -
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