To avoid shorting TDS meter, keep the meter dry. Do not spill water or any other
liquid on the meter. Do not damage meter by removing or twisting cell cup.
Be sure cell cup is clean; wash with soap and water if required.
(a) Rinse cell cup three times with water to be tested.
(b) Fill cell cup to 1/2 inch from top with water to be tested.
Do not use range extender when testing product water.
(c) Push range extender into cup, seating the O-ring.
Always start with meter set on the 0 to 5 x 1000 scale. If you use a lower scale
first, you may damage the meter.
(d) Set range switch to 0 to 5 x 1000 scale.
(e) Press indicator button. If reading is less than 500, switch to the 0 to 5 x 100 scale range.
If reading is below 50, switch to 0 to 5 x 10 scale range.
(f) Record highest 0-to-5 reading by range factor used to get that reading (10, 100, or
1000) to get proper value in ppm or mg/l; record.
If using the range extender, multiply this value by 10.
(g) Remove range extender and thoroughly rinse extender and cell cup using purest water
available. Wipe dry with clean cloth.
PREPARATION FOR MOVEMENT.
If operation will be reestablished within 3 days, cleaning R.O. elements is not
Backwash MULTIMEDIA filter (para. 2-26) and clean R.O. elements (para. 2-29).
b. Shut off ROWPU normally (para. 2-31).