Teledyne 4220 installation and operation guide Sampler

4220 Flow Meter
Section 2	Programming
		After you have determined what condition will signal the
		sampler and under what circumstances, the following menu will
		appear:
		SELECT OPERATOR
		• DONE • • OR • • AND •
		SELECT OPERATOR allows you to trigger the sampler from a
		single condition 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.
		However, suppose you wanted to select two conditions, either of
		which would trigger the sampler. In such a case you would select
		OR for the SELECT OPERATOR step. The menu will return to
		the one listing the conditions. This will let you define the second
		condition. Now the flow meter will trigger the sampler when
		either condition changes.
		Finally, suppose you had a situation where you wanted changes
		in two conditions to occur before you signalled the sampler. In
		that case you would select AND for the SELECT OPERATOR
		step. Then you would define the second condition. Now the flow
		meter will signal the sampler only after both conditions have
		changed.
		The next screen on the flow meter (after you have established the
		conditions for sampler pacing) will request the following.
		(Entering 0 sends no pulses.)
		CONDITION TRUE PACING INTERVAL
		PACE EVERY X MINUTES
		This option allows you to send flow pulses periodically to the
		sampler during the time the conditions you established for
		sampler pacing are being met. Then:
		CONDITION FALSE PACING INTERVAL
		PACE EVERY X MINUTES
		This option allows you to send flow pulses periodically to the
		sampler during the time the conditions you established for
		sampler pacing are not being met. Again, entering 0 sends no
		pulses.
2.4.8	Step 6 - Sampler	The operation of step 6 Sampler Enable is similar to step 5,
	Enable	Sampler Pacing. The menus and options are similar. The dif-
		ference is that where sampler pacing only causes the flow meter
		to send a momentary signal (flow pulse) to the sampler, sampler
		enabling actually controls an inhibit line to the sampler that can
		keep the sampler from running its program. Sampler enabling is

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