Spectra Watermakers Catalina 340 Z, Installation And Operating Manual

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Salinity Probe Calibration
Salinity is a measurement of dissolved solids in liquid. These solids will conduct electricity to
varying degrees. A probe with two electrical contacts determines the resistance to the flow of
electricity in the liquid. The higher the resistance, the fewer the PPM (parts per million) of dis-
solved solids. Spectra considers water below 750 PPM to be potable, and water below 500
PPM to be excellent.
The salinity probe is located in the diversion valve manifold, connected to the product water
line from the membrane. The salinity probe monitors the salinity level of the product water
before deciding to either reject the water and send it overboard, or accept it and divert it into
the tank.
The salinity level in PPM can be seen on the remote display.
Using a hand-held tester, note the salinity in PPM of your product water after the unit has
been running. Be sure to calibrate the hand-held salinity meter as per the manufacturer’s in-
structions.
Access the Program Mode from the remote display (simultaneously press and hold the Stop
and Alarm/Displ buttons for 4 seconds). Press Alarm/Displ to scroll through the menus until
you reach the Salinity Cal heading.
The number on the left is the real time salinity reading and the number on the right is the cali-
bration setting. Increase or decrease the setting until the number on the left corresponds to
the number acquired from the handheld tester.
Note: Occasionally you may need to calibrate the handheld salinity tester. In order to properly
calibrate, a water sample of known salinity must be acquired. These are available from Spec-
tra, part number EL-SLT-CGS8.