Endress+Hauser Proline Prosonic Flow 93T Portable - Page 90

Description of Device Functions Proline Prosonic Flow 93T Portable
90 Endress+Hauser
WERT 0_4 mA
(4003)
Parametrierbeispiel A:
1. VALUE 0_4 mA (4002) = not equal to zero flow (e.g. -5 m

/h)
VALUE 20 mA (4003) = not equal to zero flow (e.g. 10 m

/h) or
2. VALUE 0_4 mA (4002) = not equal to zero flow (e.g. 100 m

/h)VALUE 20 mA
(4003) = not equal to zero flow (e.g. -40 m

/h)
WERT 20 mA (4003) = ungleich Nullduchfluss (z.B. -40 m

/h)
und
MESSMODUS (4004) = STANDARD
When you enter the values for 0/4 mA and 20 mA, the working range of the
measuring device is defined. If the effective flow drops below or exceeds this working
range (see m), a fault/notice message is generated (#351-354, current range) and the
current output responds in accordance with the parameter settings in the function
FAILSAFE MODE (4006).
A0001262
Parameter setting example B:
1. VALUE 0_4 mA (4002) = equal to zero flow (e.g. 0 m3/h)
VALUE 20 mA (4003) = not equal to zero flow (e.g. 10 m3/h) or
2. VALUE 0_4 mA (4002) = not equal to zero flow (e.g. 100 m3/h)
VALUE 20 mA (4003) = equal to zero flow (e.g. 0 m3/h)
and
MEASURING MODE (4004) = STANDARD
When you enter the values for 0/4 mA and 20 mA, the working range of the
measuring device is defined. In doing so, one of the two values is parameterised as zero
flow (e.g. 0 m3/h). If the effective flow drops below or exceeds the value
parameterised as the zero flow, no fault/notice message is generated and the current
output retains its value. If the effective flow drops below or exceeds the other value, a
fault/notice message is generated (#351-354, current range) and the current output
responds in accordance with the parameter settings in the function
FAILSAFE MODE (4006).
A0001264
Deliberately only one flow direction is output with this setting and flow values in the
other flow direction are suppressed.
Parameter setting example C:
MEASURING MODE (4004) = SYMMETRY
The current output signal is independent of the direction of flow (absolute amount of
the measured variable). The 0_4 mA value m and the 20 mA value n must have the
same sign (+ or -). The "20 mA VALUE" o (e.g. backflow) corresponds to the mirrored
20 mA VALUE n (e.g. flow).
A0001249
ASSIGN RELAY (4700) = FLOW DIRECTION
With this setting e.g. the flow direction output via a switching contact can be made.
Functional description
OUTPUTS E  CURRENT OUTPUT 1 EAA  CONFIGURATION 400
-5 0 0
-40
44
20
20
10 100
mA
mA
Q
➀➀ ➀➀
1) 2)
Q
00
4
4
20
20
10 100
mA
mA
Q
Q
➀➀
1) 2)
Q
20
0
mA
4
mno