Calibrate the meter.
With daily use, the total dissolved solids meter only needs to be calibrated once every three months.
Be sure cell cup is clean and free of any scale prior to calibration.
If the meter does not function per the following procedures, see troubleshooting.
Figure 2-7. Total Dissolved Solids Meter Adjustment
Carefully pry the bottom cover (1) off meter (2).
With meter (2) off, adjust pointer (3) to zero by turning meter zero adjust screw (4).
Fill the cell cup (5) with standard solution 442-3,000 (6) to 1/4 inch (6 mm) above upper electrode (7).
Position range switch (8) to 1000.
Press button (9). Pointer (3) should be at 3f0.1 on scale, if not, adjust master calibration control (10) until
pointer reaches 3.
Discard solution and flush the cell cup (5) with demineralized or distilled water. Discard wash water.
Flush the cell cup (5) with standard solution 442-300 (11) and discard solution. D-2 c