Endress+Hauser prosonic flow 92, Руководство по эксплуатации

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Prosonic Flow 92 11 Description of device functions
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
➀ ➁
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