Myron L PS9TK - Manual (Page 26)

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2. Measuring ORP
1. Ensure the PS9 is in ORP/FC E mode (ref. ORP/FC E Mode
Selection, pg. 21).
2. Remove protective cap by rotating while grasping and pulling up.
3. Rinse sensor well and cell cup 3 times with sample to be
measured. Shake out each sample to remove any residual liquid.
4. Refill both sensor well and cell cup with sample.
5. Press .
6. Take reading.
7. Press MS to store reading in memory, if desired.
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. 48). Do not allow pH/ORP sensor to dry out.
I. Measuring Free Chlorine Using FC E
The FC E function can be used to measure discrete samples, flowing
solution and bodies of water. Measurement technique is particular to the
type of sample. For accurate results, use the FC E Flow Method described
in section 2 below to measure discrete or flowing samples. Use the FC E
Immersion Method described in section 3 below in situations where the
PS9 can be dipped to obtain a sample. Read through section 4. FC E
Best Practices before you begin.
1. Prepare for FC E Measurement
1. For ease of measurement, set the instrument’s Auto oFF feature
to 75 sec (ref. AUTO OFF, pg. 43).
2. Ensure the FC E mode has been activated (ref. ORP/FC E Mode
Selection, pg. 21).
3. Remove protective cap from the pH/ORP sensor by rotating
while grasping and pulling up.
2. FC E Flow Method
1. Empty the pH/ORP sensor well of all storage solution.
2. Hold the PS9 at a 30º angle (cup sloping downward).
3. Thoroughly flush the sensor well and cell cup with a steady
stream of the solution you intend to measure by allowing the