4220 Flow Meter
Section 2 Programming
chosen from this menu before the flow meter recognizes the event as a storm. The next menu defines the interval that must pass between storm events.
TIME SINCE LAST RAINFALL
DAYS: X (allowable entry of
If you select CONDITION from SAMPLER ENABLE, the fol- lowing will appear:
CONDITION
• (LEVEL) • • (FLOW RATE) • • (D. O.) • • (pH) •
(TEMPERATURE), (RAINFALL), (YSI pH), (YSI DO), (YSI CONDUCTIVITY) and (YSI TEMP) may also appear.
The above conditions are all shown in parentheses, because they may not be available to you by the time you reach this menu. The menus that do appear will depend on programming selections made earlier in the program. At least one of the conditions will be available to you. If you select LEVEL from CONDITION the following will appear:
LEVEL
• GREATER THAN • • LESS THAN • • RATE OF CHANGE •
After you select one of these options, the flow meter will request that you enter a value, for example if you selected GREATER THAN:
LEVEL
GREATER THAN X.XX FEET (or other units of measure)
Enter a maximum value for the selected condition, which if exceeded, will enable the sampler. If you select LESS THAN, the flow meter will ask you to enter a minimum value for the selected condition. If the condition falls below that value later, the flow meter will enable the sampler.
If you select RATE OF CHANGE, the flow meter will ask you to enter two values, one for the condition, and the other for a period of time over which the change occurs.
After you have determined what condition will signal the sampler and under what circumstances, the following menu will appear:
SELECT OPERATOR
• DONE • • OR • • AND •
This step allows you to trigger the sampler from a single con- dition or from two conditions. Suppose you wanted to trigger the sampler from only one condition and that condition was level. You would select level as the condition, and then identify what change in level would be the trigger. Then you would select DONE for the SELECT OPERATOR step. Selection of DONE will advance the flow meter to the next program step. Selection of OR or AND will allow you to select another condition, and then
