![Hanna Instruments HI 8510 Скачать руководство пользователя страница 39](http://html1.mh-extra.com/html/hanna-instruments/hi-8510/hi-8510_instruction-manual_590924039.webp)
37
•
Acid Contacts (HI 8711 and
HI 931501 only): these two
contacts are for the connec-
tion to the dosing pump for
the acid. They act as a switch
for the power to the drive.
•
Base contact (HI 8711 and
HI 931501 only): these two
contacts are for the connec-
tion to the dosing pump for
the base. They act as a switch
for the power to the drive.
•
Consent Contacts (HI 8710,
HI 8720, HI 931500 and
HI 932500 only): these con-
tacts (maximum 2A, 220 V)
are used for reduction and oxidation reac-
tions when the pH controller is used in
conjunction with an ORP Controller and
viceversa. In these applications, the con-
sent contacts of both meters are con-
nected together to link the ORP and pH
controllers so that ORP dosage will occur
only if the actual pH value is correct. This
is to avoid overdosage of oxidants or re-
ductants which may lead to undesirable
pollution.
The "Consent" contacts can be left open if
HI 8710 or HI 931500 are used indepen-
dently as pH controllers only.
The "Consent" should be shorted if HI 8720
or HI 932500 are used independently as
ORP controllers only.
•
Alarm Contacts (HI 8710,
HI 8711 and HI 8720 only): if
the measured pH or ORP is
not within the tolerance of
the set value, the alarm con-
tact is closed. This can occur if there is
insufficient dosage or if there is overdosage.
Note: all external cables to be connected to the rear
panel should be ended with cable lugs.
FUSE
ACID
FUSE
FUSE
BASE
FUSE
FUSE
CONSENT
FUSE
FUSE
ALARM
FUSE