Myron L TH1 - Manual (Page 14)

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3. Use the or key to select type of solution desired
(ref. Solution Characteristics, pg. 28). The selected solution
type will be displayed: KCl, NaCl or 442.
4. Press to accept new solution type.
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. (ref. CALIBRATION INTERVALS, pg. 14).
B. Rules for Calibration of the TechPro II
1. Calibration Steps
a. Starting Calibration
Calibration is begun by pressing while measuring Conductivity,
TDS or pH. Measuring continues, but the CAL icon is on, indicating
calibration is now changeable.
The reading is changed with the and keys 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.
Once in “CAL” mode, the key becomes an “ACCEPT” key. At each
point, pressing accepts the new calibration value and steps you to
the next adjustment (or out of CAL mode if there are no more steps).
In the first six sections, you have learned all
you need to take accurate measurements.
The following sections contain calibration,
advanced operations and technical information.