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Model GFC7000E Instruction Manual THEORY OF OPERATION
04584 Rev A1 176
Table 10-3: Front Panel Status LED’s
NAME COLOR STATE DEFINITION
SAMPLE Green Off
On
Blinking
Unit is not operating in sample mode, iDAS is disabled.
Sample Mode active; Front Panel Display being updated, iDAS data being stored.
Unit is operating in sample mode, front panel display being updated, iDAS hold-off
mode is ON, iDAS disabled
CAL Yellow Off
On
Blinking
Auto Cal disabled
Auto Cal enabled
Unit is in calibration mode
FAULT Red Off
Blinking
CO
2
warnings exist
Warnings exist
10.4.1.2. Keyboard
A row of eight keys just below the vacuum florescent display (see Figure 10-17) 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.
10.4.1.3. Display
The main display of the analyzer is a vacuum florescent display with two lines of 40 text
characters each. Information is organized in the following manner (see Figure 10-17):
Mode Field: Displays the name of the analyzer’s current operating mode.
Message Field: Displays a variety of informational messages such as warning messages, operation
data and response messages during interactive tasks.
Concentration Field: Displays the actual concentration of the sample gas currently being measured
by the analyzer
Keypad Definition Field: Displays the definitions for the row of keys just below the display. These
definitions dynamic, context sensitive and software driven.