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TDS MONITOR
This model of the EZ-RO comes preinstalled with a
TDS (Total Dissolved Solids) monitor. This TDS monitor
measures the combined TDS from the mineral feed
cartridge and blend valve going to the storage tank.
Total Dissolved Solids is the total amount of inorganic
elements, including minerals, salts or metals, dissolved
in a given volume of water, other than the pure
water molecules (H2O) and suspended solids. TDS is
expressed in parts per million (ppm).
Additional hook and loop is supplied to attach the TDS monitor
to another surface within the maximum length of wire.
SPECIFICATIONS
• TDS Range: 0-9990 ppm
• Resolution: 1 ppm (0-999); 10 ppm (1000-9990,
indicated by a blinking 'x10' image)
• Accuracy: +/- 2%
• Cable Length: 24.5" (including sensor)
• Power Source: 2 x 1.5V button cell batteries
(size: LR44) (included)
• Battery Life: approximately one year
• Dimensions: 7.6 x 2 x 4.7
USAGE
1. Press the "ON/OFF" button.
2. The monitor will display the TDS level.
3. The displayed TDS will be most accurate after
approximately 10 seconds.
4. Turn off the unit. It will automatically shut off after
10 min.
CHANGING THE BATTERIES
1. Unscrew the three metal screws (not the orange
plastic screw) on the rear of the unit and remove the
back panel.
2. Remove the batteries.
3. Replace with two new LR44 batteries. Ensure the
polarity is correct.
4. Close the back panel and replace the screws.
RECALIBRATION
Your monitor was factory calibrated to 342 ppm (NaCl).
This level is suitable for most tap water/filtered water
applications. However, you may need to recalibrate
based on your needs, as well as from time-to-time to
ensure best results.
PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE
1. Purchase a
calibration
solution
from your
dealer that
is correct
for your
needs.
2. Disconnect
the T-Fitting from its hose. Do not remove the
sensor from the T!
3. Ensure the orientation of the sensor to the fitting is
correct, as in the illustration.
4. Turn on the monitor and place the T-Fittings (with
the sensor in it) into the calibration solution. You will
get a reading.
5. If the reading on the monitor does not match the
solution, adjust the reading up or down by gently
turning the orange screw on the rear of the monitor
clockwise or counter-clockwise.
6. The monitor should read approximately 10% below
the calibration solution. The monitor is designed for
flowing water and this discrepancy will compensate
for that.
NOTE: If you are calibrating with a flowing solution,
ignore this.
7. Once the reading is correct, turn the monitor off
and remove from the solution.
Your monitor is now calibrated.
CARE, MAINTENANCE AND TROUBLESHOOTING
• Never touch the sensor pins, as skin oils may
adversely affect the TDS measurement.
• To clean the sensor pins, clean with rubbing alcohol
and let air dry.
• If you notice the readings are off from what they
should be, replace the batteries or re-calibrate.
If your meter displays an 'ERR' message this could be
for one of the following reasons:
• The TDS level is out of the range of the meter (over
9,990 ppm).
• The sensor
connector has been
pulled out of the
monitor.
• There is something
wrong with the unit.
Contact Pentair
customer service.
FOODSERVICE.PENTAIR.COM | 21
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