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7
CONTROLS & DISPLAYS
7.1 Displays – Fig. 7.1.
The displays comprise a 5-digit, 7-segment digital upper
display line and a 16-character dot-matrix lower display line.
The upper display line shows actual values of hydrogen purity,
hydrogen in air, air in carbon dioxide, alarm set points or
programmable parameters. The lower display line shows the
associated units or programming information.
7.2 Switch Familiarization Fig. 7.1 and 7.2
Upper
Display Line
Lower
Display Line
Alarm
L.E.D.'s
Membrane Switches
Fig. 7.1 Location of Controls and Displays
98.5
%H2 IN AIR
7 CONTROLS AND DISPLAYS
Advance to
next page
Page 1
Parameter 1
or
Parameter 2
Parameter 3
For majority
Parameter 4
of parameters
A – Advancing to Next Page
Page X
Parameter 1
Advance to
next parameter
Parameter 2
Parameter 3
Parameter 4
B – Moving Between Parameters
Parameter Value
or
C – Adjusting and Storing a Parameter Value
Parameter X
Y
Z
or
D – Selecting and Storing a Parameter Choice
Fig. 7.2 Function of the Membrane Switches
Page 2
Parameter 1
Parameter 2
Parameter 3
Adjust
New value is
automatically stored
Select
New value is
automatically stored
19
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