Siemens SITRANS FUH1010PVDX, Руководство по эксплуатации, Страница: 166 / 308

5-64
CQO:1010PVXFM-3 Section 5
5.9.3 ANALOG INPUT SETUP (optional function)
The Analog Input Setup function assigns an active analog input to a measurement channel/path. The
meter provides one DC current input port per measurement channel/path. The DC current input ranges
from a zero level of 4 mA to a full scale of 20 mA. The [Analog Input Setup] menu cell allows you to
enable this port and then span it to any desired scaling.
For example, when using the analog input viscosity function the numeric variables might be spanned as
follows: 4mA=1 (water) and 20mA=100 (more viscous liquid). This spanning configuration allows the
meter to use this constant numerical change to improve calibration in real time.
The FUH1010PVX flowmeter models allow you to associate the analog input to active system variables
such as specific gravity, viscosity and others (see tabel below).
NOTE: Refer to the Installation Drawing (1010X-7 and 1010DX-7) or I/O Module markings for the
locations of these inputs and wiring procedures.
I/O Data Control Analog Inp Setup Iin1 Input Off
Aux
cS
PSIA
BARA
T1 Deg F
T1 Deg C
T2 Deg F
T2 Deg C
4 mA numeric entry
20 mA numeric entry
Iin2/Iin3/Iin4 See Iin1 option list
Note that the flowmeter recognizes the first analog input variable that is assigned to any given param-
eter and ignores any subsequent input with the same assignment. For example, if Iin1 and Iin2 are both
assigned to represent pressure (PSIA), the meter will only use the pressure input from Iin1.
Setting up the Analog Current Input
The first step is to enable the DC current input port.
From the [Analog Input Setup] menu cell:
To access the [Iin] option list press the <Right Arrow> twice.
Move the cursor down to [Aux (n)] press the <Down Arrow> and then <ENT>. This enables the
port to receive an input current. The cursor moves to [4 mA].
To enable numeric entry press the <Right Arrow>. Type a numeric value corresponding to a 4 mA
input signal.
To assign functions to Relay 1:
To access the [Relay 1] option list press
Move the cursor to the desired relay assignment by pressing
To store selection press
ENT