Owner`s manual

TO CALIBRATE pH:

The CAT 4000 is far more accurate than most liquid test standards, but pH

calibration is necessary to match manual water testing results, compensate for a

depleted or unclean pH sensor, and confirm proper operation of the system.

While in normal operating mode:

Press MENU.

Press DOWN to find the pH Calibrate menu item.

Press ENTER to select pH Calibrate.

The sensed pH value as currently calibrated will be displayed:

Press UP or DOWN match your known good standard.

Press ENTER to save your selection.

The controller will automatically return to normal operating mode in 10 seconds.

TO SELECT pH FEED MODE:

The CAT 4000 is programmed at the factory to operate in automatic feed mode as the

default setting. Other pH feed mode selections include off (disabled), and manual on

for a fixed interval up to 25 minutes after which automatic feed will resume.

While in normal operating mode:

Press MENU.

Press DOWN to find the pH Feed Mode menu item.

Press ENTER to select pH Feed Mode.

The current pH feed mode will be displayed:

Press UP or DOWN to find the desired selection.

Press ENTER to save your selection.

The controller will automatically return to normal operating mode in 10 seconds.

The off (disabled) mode is useful when servicing pH feed equipment, or if pH

chemical supply has been depleted.

The manual on mode allows constant chemical feed for a fixed interval of up to 25

minutes. This feature is useful when the addition of extra chemicals is desired, as

well as during initial balancing of the water.

Note: Always disconnect chemical feeder power cords prior to performing any

electrical service.

pH Calibrate

7.5 pH

pH Feed Mode

Automatic Feed