NUS-4
Seite 22
NUS-4 K05/0216
P12: - - - a Error indication by the current output
In case of error the NUS-4 will provide one of the current outputs below. (For errors and their
interpretation see Chapter 10).
a
E
RROR INDICATION
(
ACCORDING TO
NAMUR)
0
Hold last value
1
3.8 mA
2
22 mA
FACTORY DEFAULT: 0
9.3 Relay Output
P13: - - - a Relay function
a
Relay function
Also set
0
DIFFERENTIAL LEVEL
CONTROL
(Hysteresis control)
Relay is energised if the measured
or calculated value exceeds the
value set in P14 Relay is de-
energised if the measured or
calculated value descends under
the value set in P15.
Relay
Energised:
De-energised:
C1 C2
Time
P14
P15
Level
P14, P15
There is a need to set
(in level min 20mm)
hysteresis between
P14 and P15
P14 > P15
– normal
operation
P14 < P15
– inverted
operation
1
Relay is energised in case of Echo Loss
-
2
Relay is de-energised in case of Echo Loss
-
3
COUNTER
Used for open channel flow
metering.
A 140 msec pulse is generated
every 1, 10, 100, 1.000 or 10.000
m
3
according to P16.
Relay
10m
3
Energised:
De-energised:
C1 C2
140 ms
TOT
Time
10m (P16)
3
20m
3
P16= 0: 1m
3
P16= 1: 10 m
3
P16= 2: 100 m
3
P16= 3: 1.000 m
3
P16= 4: 10.000 m
3
In de-energised state of the device the „C1” circuit is closed.
The „Relay” LED is on when the „C2” circuit is closed.
FACTORY DEFAULT:
P13=2
P14: - - - - Relay parameter – Operating value
P15: - - - - Relay parameter – Releasing value
P16: - - - - Relay parameter – Pulse rate P13(3)
FACTORY DEFAULT:
P14=0, P15=0
,
P16=0
