4 mA level
The current signal is set to 3.8...20.5 mA as standard when operating correctly. When
selecting the 4 mA level, it is ensured that a minimum current signal does not fall below
4 mA.
The following applies:
•
OFF: lower current level 3.8 mA
•
ON: lower current level 4 mA
#
Matrix Path through the
menus
Entry
Main group: Additional functions
1
V7H3
(V1H3)
➤
Current output
min. 4 mA
e.g. ON
Confirm
Alarm mode
To indicatean error, an error code is transmitted with the measured value.
The bar graph in the display adopts the value selected by the operator.
For the "Alarm mode" (V0H8) = "Max. alarm" setting, the current is adjustable from
21...22.5 mA using the "Max. alarm current" (V9H4) parameter (Factory setting: 22 mA).
#
Matrix Path through the
menus
Entry
Main group: Basic settings
1
Select output on error
V0H8
➤
Alarm mode
e.g.
Max. alarm
Confirm
Main group: Service
2
Enter current "Max. alarm" value
V9H4
➤
Max. alarm
current
e.g. 22 mA
Confirm
7.2 Locking/unlocking the matrix
After all parameters have been entered, the matrix can be locked.
•
via the keys +Z and –S or
•
via the matrix by entering a code number
≠
130 in V9H9
(130 is the code to unlock the matrix).
This protects the measuring point from accidental and unauthorised entries:
Keys
#
Key
Entry
1
Lock operation:
Press +Z and –S simultaneously once
2
Unlock operation:
Press +S and –Z simultaneously once
Matrix
#
Matrix Path through
the menus
Entry
Main group: Service
1
Lock operation (locking)
V9H9
➤
Locking
e.g. 131 (
≠
130)
Confirm
2
Release operation (unlocking)
V9H9
➤
Unlocking e.g. 130
Confirm
The table below summarises the locking function:
– –
+
+
Z
S
– –
+
+
Z
S
– –
+
Z
S
– –
+
Z
S
+
+
BA174Y27
Locking
press "+Z" and "–S"
simultaneously
Unlocking
press "–Z" and "+S"
simultaneously
Locking with keys has priority
t
I
max.
min.
Error
Max. alarm,
max. current adjustable,
range 21...22.5 mA
BA174Y24
Value hold
Min. alarm = 3.6 mA
Locking via
Display/reading
of parameters
Changing/writing of parameters
Unlocking via
keys
communication
keys
communication
Keys
yes
no
no
yes
no
Matrix
yes
no
no
yes
yes
Deltabar S
7 Flow Measurement
Hauser
53
