Hanna Instruments HI 9931 User Manual

Page 12

GENERAL POINTS

• The relay terminals

relay terminals

relay terminals of the controller are powered

powered

powered. This

means that you can simply hook up your pump or electrovalve
directly to the controller and do not need additional power
supply.

• Unscrew the 4 screws on the right hand panel and remove the

cover and the gasket. Thread the wires through the access ports
on the right hand side of the controller.

• Before

Before

connecting the controller to the mains, wire

the controller completely

the controller completely and make all the connections for
pumps, alarm, probe, set the alarm threshold and adjust the
settings. Upon completion replace the cover

replace the cover

replace the cover. Only then

connect the controller to the power supply.

PROBE CONNECTION

• Attach the conductivity/TDS probe (HI 3002, HI 3001D or

HI 7638) to the DIN socket located on the bottom of the casing.
Align the guide on the connector with the socket, push the
connector in and tighten the retainer ring. (HI 3002 is more
suitable for direct immersion in the tank, vat or pipes. HI 3001D
can be mounted directly into a pipe and HI 7638 is recom-
mended for high temperature and pressure applications).

• The probes incorporate a temperature sensor and the controller’s

circuitry automatically compensates for the temperature effect.

RELAY CONNECTIONS

• Wire the external devices (pumps or electrovalves) directly to the

relay terminal strips of the controller (see 17 - Functional Dia-

CONNECTIONS & WIRING

DIN connector

WIRING ACCESS

PORTS

This manual is related to the following products:

HI 9934