Figure 10-9: Front Panel - Teledyne 400E Instruction Manual

THEORY OF OPERATION
Front Panel
The Front panel of the analyzer is hinged at the bottom and may be opened to gain
access to various components mounted on the panel itself or located near the front
of the instrument (such as the Particulate Filter). Two fasteners located in the upper
right and left corners of the panel lock it shut.
FASTENER
Display
The main display of the analyzer is an Vacuum Florescent Display with two lines of
40 text characters each. Information is organized in the following manner:
Mode Field: The far left portion of the top line of text displays the name of the
operation mode in which the analyzer is currently operating for more information on
operation modes see Section 6.1.
Message Field: The center portion of the top line of text displays a variety of
informational messages. Warning messages are displayed here as are responses by
the analyzer to queries for operation data about the instrument. During interactive
tasks, such as instrument calibration or certain diagnostic procedures, the
instrument's response messages are also displayed here.
Concentration Field: The far right portion of the top line of text displays the
concentration of the sample gas currently being measured by the analyzer. The
number reported here is the actual concentration of the Sample Gas reported in
whatever units the user selects. This number remains unaffected, regardless of how
the ranges of the instrument's analog outputs are configured.
Key Definition Field: The Bottom line of text displays is reserved for defining the
function of the row of keys just below the display. These definitions change
depending on which part of the software menu tree is currently being displayed.
238
KEY DEFINITIONS
MODE FIELD MESSAGE FIELD
SAMPLE A
<TST TST>
Α∆ςΑΝΧΕ∆ ΠΟΛΛΥΤΙΟΝ ΙΝΣΤΡΥΜΕΝΤΑΤΙΟΝ, ΙΝΧ. GAS FILTER CORRELATION ANALYZER - MODEL 300E
KEYBOARD

Figure 10-9: Front Panel

CONCENTRATION FIELD
CO = 40.0
RANGE = 50 PPM
CAL
SETUP
Model 400E Ozone Analyzer
Instruction Manual
STATUS LED's
FASTENER
SAMPLE
CAL
FAULT
POWER
ON / OFF SWITCH
P/N 04316 Rev: B