Myron L TechPro II, Operation Manual

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6. IMPORTANT: After use, fill pH sensor well with Myron L pH
Sensor Storage Solution and replace protective cap. If Myron L
pH Sensor Storage Solution is unavailable, use a strong KCl solution,
a pH 4 buffer, or a saturated solution of table salt and tap water (ref.
Cleaning Sensors, 2. pH, pg. 20).
Do not allow pH sensor to dry out.
VI. SOLUTION SELECTION (TPH1 & TP1)
A. Why Solution Selection is Available
Conductivity and TDS require temperature correction to 25°C values (ref.
Standardized to 25°C, pg. 25). Selection determines the temperature
correction of conductivity and calculation of TDS from compensated
conductivity (ref. Cond. Conversion to TDS, pg. 28).
B. The 3 Solution Types
On the left side of the display is the salt solution characteristic used to
model temperature compensation of conductivity and its TDS conversion.
Generally, using KCl for conductivity, and 442 (Natural Water characteristic)
for TDS will reflect present industry practice for standardization. This is how
your instrument is shipped from the factory (ref. Solution Characteristics,
pg. 28). NaCl may be user selected for either.
C. Calibration of Each Solution Type
There is a separate calibration for each of the 3 solution types. Note
that calibration of a 442 solution does not affect the calibration of a NaCl
solution. For example: Calibration (ref. Conductivity or TDS Calibration,
pg. 11) is performed separately for each type of solution one wishes to
measure (ref. Conductivity/TDS Standard Solutions, pg. 24).
D. Procedure to Select a Solution
NOTE: Check display to see if solution displayed (KCl, NaCl or 442) is
already the type desired. If not:
1. Press or to select the parameter on which
you wish to change the solution type.
2. Press and hold key
for 3 seconds. “SEL” will be
displayed (see Figure 1).
For demonstration purposes,
all 3 solution types are
shown simultaneously.
Figure 1
KCl
442
NaCl