Aalborg SDPROCs - Manual (Page 34)

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By default, Ratio Mode is disabled for each channel. In order to be able to enable Ratio
Mode, the value of the ratio in % for a particular channel has to be more than 0%. It is
recommended to begin Ratio settings from the master channel #1 (master channel has
to be set to the highest value from the mixture). For example, if four gas mixtures are
desired with ratios: Gas#1=30%, Gas#2= 25%, Gas#3=25% and Gas#4=20% the
Gas#1 has to be set on channel#1 (master channel). In order to setup channel#1 from
the above screen, press the Esc button under NEXT on the display until the following
screen will appear.
Ratio mode settings for first channel on the Multi-channel SDPROC
Press one more time the Esc button under NEXT on the display, in order to go to the
Ratio value settings screen. The following display will appear.
Ratio value settings for first channel on the Multi-channel SDPROC
Pressing (+) or (-) will increment or decrement the Ratio Value settings per 0.1% F.S.
respectively. The number in the upper right corner of the screen, represents the total
value of the mixture (the sum of the ratio values for all available channels). It is impor-
tant to have this number equal to 100% in the end of the ratio settings (otherwise the
Ratio mode will not operate properly). When complete with Ratio value settings fort the
first channel, press the Esc button under NEXT on the display, to go to the ratio settings
for the second channel. The following display will appear.
Ratio mode settings for second channel on the Multi-channel SDPROC
NOTE: The ratio mode for channel#2 is disabled because the ratio value is set to zero
by default. Press one more time the Esc button under NEXT on the display, to go to the
ratio settings for the second channel. The following display will appear.
Ratio value settings for second channel on the Multi-channel SDPROC
NOTE: This assumes that the ratio value for the master channel#1 was set to 35%.
Continue with ratio value settings for all required channels.