
Theory Of Operation
Model 100E Instruction Manual
192
045150102 Rev XB1
10.6.1.3. 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 10-20):
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.
10.6.1.4. Keyboard/Display Interface Electronics
FRONT PANEL
Keypad
Decoder
Key Press
Detect
KEYBOARD
Beeper
Sample LED
(Green)
Cal LED
(Yellow)
Fault LED
(Red)
Display Data
Decoder
Display Power
Watchdog
From 5 VDC
Power Supply
I
2
C to Relay Board
Paral
lel
Dat
a
2 x 40 CHAR. VACUUM
FLUORESCENT DISPLAY
Display
Controller
Di
sp
la
y Wr
ite
Cl
oc
k
Serial
Data
I
2
C
to
/f
ro
m CPU
K
eyb
oa
rd
I
n
te
rru
p
t S
ta
tu
s B
it
I
2
C Interface
2
nd
Lang.
Switch
Maint.
Switch
Optional
Maintenance
LED
Figure 10-21: Keyboard and Display Interface Block Diagram
The keyboard/display interface electronics of the M?00E Analyzer watches the status of
the eight front panel keys, alerts the CPU when keys are depressed, translates data from
parallel to serial and back and manages communications between the keyboard, the CPU
and the front panel display. Except for the Keyboard interrupt status bit, all
communication between the CPU and the keyboard/display is handle by way of the
Summary of Contents for 100E
Page 2: ...Model 100E Instruction Manual ...
Page 4: ...Model 100E Instruction Manual ii 045150102 Rev XB1 ...
Page 12: ...Model 100E Instruction Manual x 045150102 Rev XB1 ...
Page 20: ...M100E Documentation Model 100E Instruction Manual 18 045150102 Rev XB1 User Notes ...
Page 26: ...Specifications Approvals and Warranty Model 100E Instruction Manual 24 045150102 Rev XB1 ...
Page 46: ...Getting Started Model 100E Instruction Manual 44 045150102 Rev XB1 User Notes ...
Page 128: ...Operating Instructions Model 100E Instruction Manual 126 045150102 Rev XB1 User Notes ...
Page 156: ...EPA Protocol Calibration Model 100E Instruction Manual 154 045150102 Rev XB1 ...