Siemens Sitrans, LC 500 instruction manual Rotary Left Mode, State High, State State Low

Menu selections 03, 04, 05, and 06 set the criteria for delay and threshold that have to be met for a change in output signal.

Menu	Affected	Rotary	Left	Mode		Description	Action	Values
Item	by:	Switch	Arrow
		Position
						Signal propor-	Press both	Display
				Analog	*	tional to % of	buttons simul-	shows
						range	taneously	C: An
	03, 04, 05,					2-state High		Display
07		7	Off				Press RED (+)	shows
	06, 08
				2-				C: Hia
				state		2-state Low		Display
							Press BLUE (–)	shows
								C: Lob

a.While button is pressed, display reads C: Hi. When button is released, display shows 20.00 if the probe is covered, or 4.00 if it is uncovered.

b.While button is pressed, display reads C: Lo. When button is released, display shows 4.00 if the probe is covered, or 20.00 if it is uncovered.

Set the rotary switch to 7. To change the mode to 2-state High, press the RED (+) button for more than one second: the LCD displays C: Hi. When the button is released, the loop- current will switch to 20 mA if the probe is covered, or 4 mA if it is uncovered.

To change the mode to 2-state Low, press the BLUE (–) button for more than one second: the LCD displays C: Lo. When the button is released, the loop-current will switch to 4 mA, and if the probe is uncovered, or 20 mA if the probe is covered.

Analog Mode may be restored at any time by pressing both buttons simultaneously for more than one second. The LCD displays C: An while the two buttons are pressed, and displays the current reading when the buttons are released.

The loop-current will be between 3.8 and 20.5 mA, and will saturate to one of these values if the level goes beyond the Upper or Lower range settings.

Appendix A

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 65