53
8 Startup and parameterization
Configuring the relay outputs DO2 and DO3 to switch a load when the direction of flow changes
NOTE!
If the measured flow rate is in the range of the CUT-OFF flow rate (
see chapter 8.6.16 "Adjusting the
CUT-OFF flow rate", page 63), the flow rate is regarded as zero and positive. The following diagram
shows how the DO output responds when it is configured to report a change in flow direction and when
the CUT-OFF function is used.
Flow
+CUTOFF
0
-CUTOFF
DO output active
DO output inactive
As long as the measured flow rate is lower than -CUTOFF, the device status LED is orange and the
message NEG. FLOW is generated.
(1)
Measured flow rate
(2)
Displayed flow rate
OUTPUT
DO2
DIRECTIO.
INV YES
INV NO
1. Choose the operating mode for
the relay output (inverted or not in-
verted).
DO3
DEL. 2 = 00
1. Enter the time delay before the
switching point (value between 0
and 99 s).
2. Confirm
