Endress+Hauser prosonic flow 92 - Page 87

Prosonic Flow 92 11 Description of device functions
Endress+Hauser 87
Further information on
the “CURRENT SPAN
(OUTPUT)” function
How the current output responds under the following
conditions:
1. Defined measuring range (➀-➁):
and the following flow behaviour:
• STANDARD
The current output signal is proportional to the measured variable. The
flow components outside the scaled measuring range are not taken into
account for signal output.
•SYMMETRY
The current output signal is independent of the direction of flow.
Failsafe Mode (Output) For safety reasons it is advisable to ensure that the current output assumes a
predefined state in the event of a fault.
Options:
HOLD VALUE – MIN. CURRENT – MAX. CURRENT – ZERO
HOLD VALUE
Measured value output is based on the last measured value saved before
the error occurred.
MIN. CURRENT
Output current = 0.8 mA (–20 %; independent of the setting selected in the
function “CURRENT SPAN”, see Page 86)
MAX. CURRENT
Output current = 23.2 mA (+20 %; independent of the setting selected in the
function “CURRENT SPAN”, see Page 86)
ZERO
Output current = 4.0 mA (0.0 %; independent of the setting selected in the
function “CURRENT SPAN”, see Page 86)
Factory setting:
HOLD VALUE
Inputs and Outputs
F-xxxxxxx-05-xx-xx-xx-003
Q
20
4
0
➀➁
mA
F-x3xxxxx-05-xx-xx-xx-008
t
mA
F-x3xxxxx-05-xx-xx-xx-009
F-x3xxxxx-05-xx-xx-xx-010
t
mA