Myron L 6PFCE and 4P - Manual (Page 32)

XIII. CELL ChECK
The cell check verifies the cleanliness of the conductivity/TDS/resistivity
sensor. In normal use the cell may become dirty or coated and require
cleaning. If the display is showing “.00” when the cell cup is dry, the
sensor is probably clean. However, when testing high purity water in
resistivity (“RES”) mode improved accuracy may be desired. No matter
what a manufacturer claims, a sensor can and will become contaminated
or coated and, therefore, require cleaning. A true 4-wire sensor, as in
the Ultrameter II, helps to mitigate contamination, but NO SENSOR IS
100% IMMUNE.
1. Press .
Figure 21
2. Press to display the
stored memory records.
3. Press repeatedly until
Figure 22
you pass the FAC SEL
location. The display will
show a “CELL ch”
(see Figure 21).
4. Press to test.
If cell is clean, “Good” will
momentarily be displayed
Figure 23
(see Figure 22). If cell is
dirty, “CELL cLn” will be
displayed (see Figure 23)
(ref. Cleaning Sensors,
pg. 34).
XIV. AUTO oFF
Auto oFF allows the user to adjust the
Figure 24
time the instrument is ON (up to 75
seconds) after each press of a key.
Default time is 15 seconds with 60
seconds in CAL (calibration) mode.
1. Press .
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