Myron L 6Psi and 4P - Manual (Page 15)

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concentration is over the range limit (> 9.99 ppm). “Ur” (under range) will
display when the concentration is below the range limit (< 0.20 ppm).
6. IMPORTANT: After use, fill pH/ORP 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/ORP, pg.
32). Do not allow pH/ORP sensor to dry out.
NOTE: FOR INFORMATION REGARDING ThE ORP mV TO
ppm CONVERSION FEATURE, PLEASE SEE SECTION XXVI.
ADDENDUM, PG. 48.
VI. SOLUTION SELECTION
A. Why Solution Selection is Available
Conductivity, resistivity, and TDS require temperature correction to
25°C values (ref. Standardized to 25°C, pg. 37). Selection determines
the temperature correction of conductivity and calculation of TDS from
compensated conductivity (ref. Cond. Conversion to TDS, pg. 40).
B. The 4 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, NaCl for resistivity, 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. 40).
The User selection allows a custom value to be entered for the
temperature compensation of conductivity and also the conversion ratio
if measuring TDS.
C. Calibration of Each Solution Type
There is a separate calibration for each of the 4 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. 15) is performed separately for each type of solution one wishes to
measure (ref. Conductivity/TDS Standard Solutions, pg. 36).
D. Procedure to Select a Solution
NOTE: Check display to see if solution displayed (KCl, NaCl, 442 or
User) is already the type desired. If not:
1. Press , or to select the parameter on which