Teledyne GFC 7001EM operation manual Front Panel Interface, Analyzer Status LED’s, Keyboard

Theory of Operation Model GFC7001E Carbon Dioxide Analyzer

11.5.10.FRONT PANEL INTERFACE

The most commonly used method for communicating with the GFC 7001E/EM Analyzer is via the instrument’s front panel which includes a set of three status LED’s, a vacuum florescent display and a keyboard with 8 context sensitive keys.

Figure 11-17: GFC 7001E/EM Front Panel Layout

11.5.10.1.Analyzer Status LED’s

Three LED’s are used to inform the user of the instrument’s basic operating status. They are listed on Table

11-5 as follows:

			Table 11-5: Front Panel Status LED’s
NAME	COLOR	STATE	DEFINITION
		Off	Unit is not operating in sample mode, iDAS is disabled.
SAMPLE	Green	On	Sample Mode active; Front Panel Display being updated, iDAS data being stored.
		Blinking	Unit is operating in sample mode, front panel display being updated, iDAS hold-off
			mode is ON, iDAS disabled
		Off	Auto Cal disabled
CAL	Yellow	On	Auto Cal enabled
		Blinking	Unit is in calibration mode
FAULT	Red	Off	CO warnings exist
		Blinking	Warnings exist

11.5.10.2.Keyboard

A row of eight keys just below the vacuum florescent display (see Figure 11-15) is the main method by which the user interacts with the analyzer. As the software is operated, labels appear on the bottom row of the display directly above each active key, defining the function of that key as it is relevant for the operation being performed. Pressing a key causes the associated instruction to be performed by the analyzer.

Note that the keys do not auto-repeat. In circumstances where the same key must be activated for two consecutive operations, it must be released and re-pressed.

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