Burkert 8605 KK Instructions De Service page 34

seTTing The MiniMuM and MaxiMuM cOil currenT
start of flow
→
Set the minimum coil current I
the valve just starts to open.
→
Start with a current value at which the valve is still reliably closed and
increase the coil current with the arrow key
detects a flow for the first time.
→
Reduce the coil current by a few mA with the key
reliably closed again.
→
Confirm the minimum coil current I
Maximum flow rate
→
Set the maximum coil current I
the maximum flow rate is just achieved.
→
Increase the coil current with the arrow key
rate is reached and a further increase in the current does not result in a
further increase in flow rate.
→
Reduce the coil current with the arrow key
to drop noticeably again and confirm this value with the
maximum coil current I
indicative current values, depending on the valve type
For the current values of the start of opening and the maximum flow rate
there are default values for each valve type stored in the menu. These values
are only indicated values depending on the nominal size of the valve and
pressure ratio.
In the menu item ADJ the valve must be set to the nominal size of the valve
and the current pressure.
For all direct-acting proportional valves (i. e. all types with the exception of
Type 622), the current value I
ing inlet pressure; with an increasing pressure drop through the valve, the
value I at which the maximum flow rate is achieved also decreases.
2
For the pilot-controlled valve, Type 622, the current value for the start of
opening increase with increasing inlet pressure; with an increasing pressure
drop through the valve, the value I
4 - 8605
(AdJ = LO mA) via the arrow keys so that
1
with the
1
(AdJ = HI mA) via the arrow keys so that
2
(AdJ = HI mA).
2
for the start of opening drops with increas-
1
also increases.
2
until the flow indicator
until the valve is
-key.
until the maximum flow
until the flow rate starts
-key as the