Hanna Instruments HI 9912 User Manual
Page 4
4
pH
0
1
2
0
100
200
mV
ALARM
pH
0
SECONDS
mV
200
0
TIMER
MINUTES
90
PROPORTIONAL SETTINGS
1
10
2.5
5
7.5
0
SECONDS
pH
2.0
0
TIMER
MINUTES
90
PROPORTIONAL SETTINGS
1
10
2.5
5
7.5
500
900
CAL
ALARM
ON
OFF
SET
FEED
mV
OFFSET
SLOPE
ALARM
ON
OFF
0.5
1.5
pH
HI 9912
mV
ORP
ALARM
8
SET
FEED
ALARM
6
7
ACID
OXID
700
50
150
SET pH
SET ORP
ALARM
LINE
LCD DISPLAY
CALIBRATION
TRIMMERS
CONTROL KNOBS
AND SWICHES
OUTPUT TERMINALS
DOSING TERMINALS
POWER SUPPLY
TERMINALS
ALARM CONTACTS
MATCHING PIN
Fig. 2
Figure 2 illustrates the controls and terminals.
MECHANICAL LAYOUTS
MECHANICAL LAYOUTS
MECHANICAL LAYOUTS
MECHANICAL LAYOUTS
MECHANICAL LAYOUTS
ELECTRODE WITH
BNC CONNECTION
WIRING ACCESS
PORTS
MATCHING PIN FOR GROUND PROBE
Fig. 1
The Hanna controllers incorporate a triple contact alarm system.
When activated, the alarm contacts will open or close, triggering the
mechanism of your choice, whether a buzzer, light or any other
electrical device.
The controller is housed in a rugged, modular, fiber-reinforced ABS
housing.
All models can be wired to work with 110/115V or 220/240V
50/60 Hz power supplies.
Figure 1 illustrates the connectors for electrodes and the wiring access
ports.