User Manual

VII. CALIBRATION

A. Calibration Intervals

Generally, calibration is recommended about once per month with

Conductivity or TDS solutions. Calibration with pH solutions should

be checked twice a month. Calibration of ORP is not necessary (ref.

CALIBRATION INTERVALS, pg. 21).

B. Rules for Calibration of the Po o l Pr o

1. Calibration Steps

a. Starting Calibration

Calibration is begun by pressing

while measuring Conductivity,

MIN/SALT, TDS or pH. Measuring continues, but the CAL icon is on,

indicating calibration is now changeable.

The reading is changed with the

and to match the

known value. The calibration for each of the 3 solution types may be

performed in either conductivity or TDS mode.

Depending on what is being calibrated, there may be 1, 2 or 3 steps to

the calibration procedures.

KCl, NaCl or 442

Cond Gain only

MIN/SALT

TDS Gain only

pH 7, acid and/or base

ORP Zero set with pH 7 automatically

Gain only