4220 Flow Meter
Section 2 Programming
2-20
Note
It is important to use CHECKSUM if you plan to use internal
modems or the interrogator. The UART is shared with these
devices.
If you select SERIAL OUTPUT from the OPTIONAL OUTPUTS
menu, the following display will appear:
Selection of OFF from this menu will disable this feature, and
there will be no further references to it. The Serial Output data
appears on the Interrogator connector of the flow meter. You
should not use a standard interrogator cable for this application,
as the sense line in the standard cable is shorted to ground.
Selection of ON from this menu will enable the feature and cause
the following display to appear:
After you select the appropriate baud rate, the program will
advance to the following menu:
This menu lets you select how often the flow meter transmits the
ASCII text string.
Following is an example of a string showing all options. In actual
practice, there are no carriage returns in the text string.
DE, Theresa Street, ID,0721577657,
MO,4250,TI,35317.343715,BV,12.3,LE,0.1000,VE,0.1225,FL,0.00
1555,VO,2.199325,FV,2.199325,RV,0.000000,SV,2.195539,SS,1,B
0,35317.307384,B0,35317.269907,B0,35317.232593,CS,10819
If you select any of these outputs, the flow meter will request
that you turn them on or off. If you are running on battery and do
not need these options, select OFF. Otherwise, select ON. After
the OPTIONAL OUTPUTS menus have been set, press Enter.
The display will return to the SETUP menu.
The alarm box, also called the High-Low Alarm Box, is an Isco
product that allows you to operate control relays to signal alarms
when flow rate rises above or falls below a certain set value. You
can set both the high and low alarm values from 1 to 99% of the
controlling condition. (See Section 5 for more information about
the alarm box.)
PERIODIC SERIAL OUTPUT
• ON • • OFF
SELECT BAUD RATE (N81)
• 9600 • • 4800 • • 2400 • • 1200 •
SERIAL OUTPUT INTERVAL
• 15 SEC • • 1 MIN • • 5 MIN • • 15 MIN •