68
Communications Setup
6.
Select Unit of measurement (ppm, ppb, afd, cfs, cfm, cfd, cms, cmm, cmh, cmd, gps,
gpm, gph, lps, lpm, lph, or mgd).
7.
Enter Low Point.
8.
Apply minimum current output (4 mA) from other instrument.
9.
Enter High Point.
10.
Apply maximum current output (20 mA) from the other instrument.
11.
Select another channel to configure, or press
RETURN
to back up one step. Press the
MAIN MENU
function key to return to the Main Menu.
Example:
A dissolved oxygen meter has an analog output signal that will connect to the
950 Flow Meter analog input channel 4. The DO meter puts out an analog signal which
ranges from +1 V dc to +3 V dc, which is equivalent to 0 to 500 ppm. The DO meter is
connected to Channel 1 and log readings from the DO meter occur once per minute.
To configure data logging for this example, follow the steps below.
1.
Select
DATA LOG
from the Advanced Options menu.
2.
Highlight
SELECT INPUTS
using the
UP
and
DOWN
soft keys and then press
SELECT
.
3.
Highlight the analog channel to log (Channel 4) using the
UP
and
DOWN
soft keys,
then press
SELECT
.
4.
Press
CHANGE CHOICE
to select “Logged,” then press
ACCEPT
.
5.
Enter a 1-minute logging interval using the numeric keypad, then
press
ACCEPT
.
6.
Press
CHANGE CHOICE
to cycle through the units of measure until ppm is displayed.
Press
ACCEPT
.
7.
Apply a voltage to the desired analog input which corresponds to 0 ppm (or +1 V dc).
Enter 0 ppm using the numeric keypad and press
ACCEPT
.
8.
Apply a voltage to the same analog input that corresponds to 500 ppm or +3 V dc.
Enter 500 ppm using the numeric keypad and then press
ACCEPT
to complete the
analog channel setup.
8.4 Alarm Relays
8.4.1 Alarm Relay Connections
Note:
One cable is required for each set of two installed relays.
Up to four optional alarm relay outputs are available as factory installed options. Two
relays can be added at a time and each set of two relays share a single interface
connector.
Table 27 Relay 1 & 2 Connector Pin Assignments
Pin
Signal Description
Wire Color
A
relay #1 N.O. (normally open)
green
B
relay #1 common
black
C
relay #1 N.C. (normally closed)
white
D
relay #2 N.O. (normally open)
green
E
relay #2 common
black
F
relay #2 N.C. (normally closed)
white
Содержание Sigma 950
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Страница 6: ...4...
Страница 20: ...18 Introduction...
Страница 34: ...32 Basic Programming Setup...
Страница 50: ...48 Sensor Installation...
Страница 82: ...80 Maintenance...
Страница 83: ...81 Appendix A Program Flow Charts Figure 22 Overview of Basic Program Menus...
Страница 84: ...82 Program Flow Charts Figure 23 Setup Flow Chart...
Страница 85: ...83 Program Flow Charts Figure 24 Options Flow Chart...
Страница 86: ...84 Program Flow Charts Figure 25 Alarms Menus Flow Chart...
Страница 87: ...85 Program Flow Charts Figure 26 Calibration Menus Flow Chart Page 1...
Страница 88: ...86 Program Flow Charts...
Страница 102: ...100 Programming Features...
Страница 106: ...104 Primary Devices Head Measurement Locations...
Страница 126: ...124 SCADA Modbus System Guidelines...