Teledyne 4220 installation and operation guide Programming, Getting Started, Operation, Display

4220 Flow Meter

Section 2 Programming

2.1 Getting Started	You must program the 4220 Flow Meter to accurately monitor a
	flow stream. You must also install the submerged probe level
	sensor. The 4220 will usually also need a primary measuring
	device, a structure placed across a stream that regulates flow.
	This section describes programming the flow meter with the aid
	of the keypad and display. There are nine program steps that
	control all aspects of the flow meter's operation.
	Teledyne Isco ships the flow meter with a program already
	installed that is called the default program. You can use this
	program as an example to see the flow meter's capabilities. Note
	that the default program is just to test the unit at the factory.
	The flow meter's internal computer must always have something
	programmed into the unit, so that becomes the default program.
	Your flow situation will usually require other programming
	choices. The text provided with each screen explains the reasons
	for the various menu options.
2.1.1 Operation of the	The display is a two-line, forty character-per-line liquid crystal
Display	(LCD). It has a backlight feature for easy viewing in low light sit-
	uations. The display has three different operating modes:
	normal, programming, and messages. In the normal mode,
	the display shows such things as level, flow rate, total flow,
	parameter measurement, etc. In the programming mode, the
	top line of the display shows each step as you work through the
	program while the bottom line shows the choices available for
	that step. In the message mode, the display provides instruc-
	tional information, such as how to leave programming, or what to
	do if you have entered a number that is out-of-range.
	Following is a “normal” display on the flow meter. This is typical
	of what the flow meter will display when it is in the normal oper-
	ating mode and you are not programming it.
	0000004.78 CF	1.13 FT	16-NOV-02
	1.03 CFS	(X X)	8:25:37

An interpretation of the numbers on this display would be as follows: Time and date will be replaced by pH/D.O. and temper- ature if you are using parameter sensing. The (X X) to the right of the time indicates letters that may appear from time to time on the 4220 Flow Meter.

The letter C will appear when the flow meter is communicating with a remote computer (Flowlink applications only). The letters E or D will appear (Enable or Disable) when the sampler enable function (step 6) is programmed by condition. (Programmed by

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