27 AUG 08
PRELIMINARY MANUAL
37 of 57
Rev 1_3
Commander LI90 Series
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Relays #3 and #4 will ask for a Differential ON and Differential OFF level.
These settings must be in the same units used for the Empty and Full settings.
Differential ON
Differential OFF
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This allows the end use to select a differential level between the two
analog inputs
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Channel #1 must be the upstream level and Channel #2 the
downstream level
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Typically, Relay #3 is used for the main differential control and Relay
#4 is for an alarm differential
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Use the Next soft key to advance to the next setting
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Use the Back soft key to return to the previous setting
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When done, press Exit to leave the Secured Function Section
