Hanna Instruments HI 9931 - Manual (Page 4)

4
MECHANICAL LAYOUTS MECHANICAL LAYOUTS MECHANICAL LAYOUTS MECHANICAL LAYOUTS MECHANICAL LAYOUTS
DIN connector
WIRING ACCESS
PORTS
EC
0
1
2
ALARM
mA OUTPUT 4/20 0/20
mS
0 SECONDS mS 1.6 0
TIMER MINUTES 90
45
FINE COARSE
PROPORTIONAL SETTINGS
ALARM AUTO
MANUAL
SET
READ FERT.
SET POINT
HI 9931
1 10
2.5 5 7.5 0.8
mS
EC
FEED
ALARM
LINE
SET EC
LCD DISPLAY
CALIBRATION
TRIMMERS
CONTROL KNOBS
AND SWICHES
OUTPUT CONTACTS
DOSING TERMINALS
POWER SUPPLY
TERMINALS
ALARM CONTACTS
RECORDER OUTPUT
SWITCH
SLOPE CAL ZERO CAL
Fig. 2
Fig. 1
Figure 1 illustrates the connector for probe and the wiring access
ports.
Figure 2 illustrates the controls and terminals.
The recorder output terminals are isolated from the controller circuitry
to avoid any interference and are user-switchable between 0 to 20
mA or 4 to 20 mA.
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 at 50/
60 Hz power supplies.