4220 Flow Meter
Section 2 Programming
least one of the options will be available to you. As mentioned for other program steps, some of these menu options may not appear depending on the flow meter you have and choices you made earlier in the program. D. O., pH, TEMPERATURE, and RAINFALL all require activation in step 1 and connection of the appropriate sensor to the flow meter. D. O. and pH will never appear together, as only one can be used at a time. When you have selected the condition you want, the display will advance to the following:
CONDITION
• GREATER THAN • • LESS THAN • • RATE OF CHANGE •
For these conditions, you enter an amount which if exceeded (GREATER THAN), or if dropped below (LESS THAN), or if changed too quickly (RATE OF CHANGE), will activate the alarm dialout. For RATE OF CHANGE, you enter two values: amount and time over which change occurs. Then the display will advance to the following:.
SELECT OPERATOR
• DONE • • OR • • AND •
As described for sampler enabling previously, this step allows you to combine conditions to produce an alarm dialout signal. Select DONE if you don't need more than one condition to trigger the alarm.
If you want either of two conditions to trigger an alarm, select OR.
If you want both of two conditions to be met before signalling an alarm, select AND. Selection of DONE will advance you to the next display menu. Selection of OR or AND will return you to the CONDITION menu to select the other condition.
The flow meter will then request that you enter the telephone numbers for the remote alarms. There are five possible telephone numbers, in decreasing order of importance. You can enter as many as eighteen digits for each phone, so the remote targets need not necessarily be local.
ALARM DIALOUT NUMBERS
• DONE • • NUM 1 • • NUM 2 • • NUM 3 • • NUM 4 • • NUM 5 •
If you select DONE, the flow meter will advance to the next step. If you select one of the NUM entries, such as NUM 1, the fol- lowing will appear:
FIRST PHONE NUMBER
XXXXXXXXXXXXXXXXXX
You can enter the phone numbers as straight seven or
