Myron L 3P - Manual (Page 6)

2. Rinse sensor well 3 times with sample to be measured. Shake
out each sample to remove any residual liquid.
3. Refill sensor well with sample.
4. Press .
5. Take reading.
6. IMPORTANT : After use, fill pH/ORP sensor well with Myron L
Storage Solution, a strong KCl solution or pH 4 buffer, and
replace protective cap. Do not allow pH/ORP sensor to dry out.
N O T E : If none of the above are available, use a saturated solution of
table salt and tap water (ref. Cleaning pH/ORP Sensors, pg. 16).
B. Measuring ORP
1. Remove protective cap by squeezing its sides and pulling up.
2. Rinse sensor well 3 times with sample to be measured. Shake
out each sample to remove any residual liquid.
3. Refill sensor well with sample.
4. Press .
5. Take reading.
6. IMPORTANT : After use, fill pH/ORP sensor well with Myron L
Storage Solution, a strong KCl solution or pH 4 buffer and
replace protective cap. Do not allow pH/ORP sensor to dry out.
N O T E : If none of the above are available, use a saturated solution of
table salt and tap water (ref. Cleaning pH/ORP Sensors, pg. 16).
8
O R P
pH
In the first four sections, you have learned
all you need to make accurate measurements.
The following sections contain calibration,
advanced operations and technical information.
V. CALIBRATION
A. Calibration Intervals
Generally, calibration with pH solutions should be checked twice a month.
Calibration of ORP is not necessary. (ref. Calibration Intervals, pg. 15)
B. Rules for Calibration in the Ultrameter
1. Calibration Steps
a. Starting Calibration
Calibration is begun by pressing while measuring pH.
Measuring continues, but the CAL icon is on, indicating calibration is now
changeable.
The reading is changed with the and to match the known
value.
b. Calibration Steps
Depending on what is being calibrated, there may be 1, 2 or 3 steps to
the calibration procedures.
The
becomes an “ACCEPT” key. At each point, pressing
accepts the new calibration value and steps you to the next adjustment
(or out of CAL mode if there are no more steps).
To bypass a calibration step, just press to accept the present value
as is.
c. Leaving Calibration
You know you are finished when the “ CAL ” icon goes out. Pressing
either measurement key abandons changes not yet accepted and exits
calibration mode.
Leaving pH after the 2nd buffer results in the same gain being entered in
place of the 3rd buffer.
2. Calibration Limits
There are calibration limits. A nominal “FAC” value is an ideal value stored
by the factory. Attempts to calibrate too far from there will cause the
displayed value to be replaced with “FAC”. If you accept it, you will get the
original default factory calibration for this measurement. The need to
calibrate so far out that “FAC” appears indicates a procedural problem,
wrong standard solution, a very dirty cell cup or a dying pH/ORP sensor
(ref. Troubleshooting Chart, pg. 18).
9
CAL
MCLR
CAL
MCLR
CAL
MCLR
CAL
MCLR
M S
MR