Myron L 9PTK with FCE Free Chlorine User Manual

Page 28

nOte: If the reading takes longer than 1 minute to stabilize,
press

after 1 minute to prevent Auto-OFF feature from

disturbing the measurement process. Annunciators will alert

you when either the pH or ORP of the final FC

ppm value are

Out of Range (“-Or-”).

Press ms to store reading in memory if desired.

4. FC

Best Practices

For best results it is recommended that you:

Take 3 consecutive FC

measurements and record the

readings.

Calculate the average of the 3 measurements. Use this value.

Ignore measurements that are significantly different from the

others. Ex: 3.20 ppm, 1.15 ppm, 3.10 ppm
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, you can

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. 52). Do not allow pH/ORP sensor to dry out.

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. 59). Selection determines

the temperature correction of conductivity and calculation of TDS from

compensated conductivity (ref. Cond. Conversion to TDS, pg. 61).

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. 61).
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,