Hanna Instruments HI 9910 - Manual (Page 29)

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OVERDOSAGE TIMER OVERDOSAGE TIMER OVERDOSAGE TIMER OVERDOSAGE TIMER OVERDOSAGE TIMER
All models provide for an overdosage alarm
system ranging from 1 to 10 minutes . The
operator can set the maximum amount of
time that the dosage terminals should con-
tinuously remain activated. Should this period
elapse, the alarm terminals are activated
(and dosage disactivated to ensure that chemicals have not run out
or pumps or electrovalves have not ceased to function properly).
HI 9911 provides for two independent such
controls, one for acid dosage and another for
alkaline.
ALARM DOSING TIME
MINUTES
1 10
2.5
5
7.5
TIMER
MINUTES
1 10
2.5
5
7.5
ACID
1 10
2.5
5
7.5
ALK