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Model 360E Instruction Manual THEORY OF OPERATION
The most commonly used method for communicating with the M360E Analyzer is via the instrument’s front panel
which includes a set of three status LEDs, a vacuum florescent display and a keyboard with 8 context sensitive
keys.
10.4.1.1. Analyzer Status LED’s
Three LEDs are used to inform the user of the instruments basic operating status
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.
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