Hanna-instruments HI 9910 Manuel d'utilisateur télécharger pdf (Page 29)

OVERDOSAGE TIMEROVERDOSAGE 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

2.5

7.5

TIMER

MINUTES

2.5

7.5

ACID

2.5

7.5

ALK

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Hanna-instruments HI 9910 Manuel d'utilisateur Page 29