User Guide

• Turn the SET knob until the display shows the desired value.

•Turn back in measurement mode by pressing the MEA button.

Note: The internal pH and EC regulators have a small hysteresis to

prevent oscillations of the relay output that can damage the

pumps. As a result, the selected pH and EC values are equal to

the set value ± hysteresis value.

SETTING EC AND pH CONTROL TIMERS

The Timer feature is provided to avoid overdosing in a system with a long

response time. The running time of the dosing pumps is set through the

TIMER knob. The total time frame is 15 minutes. For example, if the

TIMER is set to 3 minutes, the EC or pH correction pumps will be active for

3 minutes and off for 12 minutes (3+12=15 minutes).

Setting the timer:

• In order to activate the timed dosing feature put the TIMED/CONT

switch to the TIMED position.

• To set the duty cycle of the dosing

pumps, turn the TIMER knob to the

desired position, from 1 to 10 minutes,

depending on the tank volume.

When the TIMED/CONT switch is at the CONT position, the EC and pH

correction pumps will run continuously.