4220 Flow Meter
Section 2 Programming
condition means that the flow meter will enable the sampler only when a certain condition or set of conditions, sensed by the flow meter, are met.)
Total Flow | Current Level Date (or pH/D.O.) |
Flow Rate | Time (temperature) |
Following is a typical programming display on the flow meter. One of the items in the second line will be flashing. The item flashing is the selection currently held in memory.
TOTALIZED VOLUME UNITS
• CF • • GAL • • M3 • • AF • • L • • MGAL •
Following is a typical display providing instructional infor- mation:
CHANGES HAVE BEEN MADE IN STEP
PRESS '0' TO CONTINUE, PRESS '1' TO DISCARD
If you stop programming for more than two minutes, the flow meter will time out, and whatever is on the display (message or program step) will revert to the “normal” display, shown previ- ously.
The program consists of steps and substeps. The steps are listed on the flow meter front panel. Most steps contain several sub- steps. Generally, you need to complete all the substeps before stopping, or the flow meter will reject the changes you made for that step after it times out. There are some exceptions.
The flow meter keeps in memory any changes that you made for the finished steps (all substeps completed before stopping). Most steps not finished when you stop will return to the previous selection.
2.1.2 Keypad Functions Programming is done on the flow meter's keypad with prompts from the display. The following sections describe the function of each key.
OFF and ON - These two keys turn the flow meter off and on.
Go To Program Step - Pressing this key lets you go directly to a particular program step without passing through all the steps of the entire program. The display will ask you to enter the number of the step you want to program. Enter the number by pressing one of the number keys. There are nine program steps, so numbers from one to nine are valid.
Exit Program - Press this key when you want to leave the pro- gramming mode and return to the normal operating mode.
Clear Entry - This key lets you return to the previous entry for a program step if you have changed the entry, but not yet pressed Enter.
Enter/Program Step - This key has two functions. One is to enter a program selection into the flow meter's memory (Enter). The other is to step through the program (Program Step).
