User Guide

PRELIMINARY EXAMINATION

GENERAL DESCRIPTION

Remove the instrument from the packing material and examine it

carefully to make sure that no damage has occurred during shipping.

If there is any noticeable damage, notify your Dealer.

Note: Save all packing materials until you are sure that the

instrument functions correctly. All defective items must be

returned in the original packing materials together with

the supplied accessories.

The HI 8931 and HI 943500 are panel mounted conductivity meters

and controllers designed for simplicity of use in a wide range of

industrial process applications.

The instruments are designed with a standard DIN panel mount with

membrane keypads on the front, a large LCD and with auto-

diagnostic functions.

Probes, power supply, contacts and recorders are connected on the

rear panel through screw terminals.

Using HI 8931 in conjunction with a 4-20 mA output transmitter

HI 8936 series (or HI 8936L series, with LCD display) will assure you

of a strong, interference-free signal at distances up to 300 meters

(1000').

For in-line applications the probe should be HI 7635 and for tanks

HI 7638 with external threads. These probes with built-in NTC sensor,

provide temperature compensated conductivity measurements. The

probe cable length is 3 meters (10').

HI 943500 features a direct connection up to 20 m (67'), without

intermediate amplifiers, to the conductivity probe HI 7638 with 7-pin

DIN connector and automatic temperature compensation.