22
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
