Myron L 9PTK - Manual (Page 22)

18
cell, close the cell extender cap securely to prevent any solution
from spilling out, then agitate and hold. Repeat as prompted.
“P
r
es cal” will display.
18. Press cal to advance to first titration prompt. “add” alternating
with either “edta lc” (Reagent H2) or “edta hc” (Reagent
H3) will display; then “agit t1” alternating with “hOld” will
display. The number after “t” indicates which titration point you
are on. The number “1” here indicates this is the first titration
point. Subsequent titration points are sequenced numerically: 2,
3, 4, etc.
19. Tap the cell extender cap to dispel any solution clinging to the
cap back into the cell. Carefully open the cell extender cap so
as not to spill any solution.
20. Change the pipette tip.
21. Using the pipette, add 100µL of Reagent H2 if “edta lc” is
displayed, or H3 if “edta hc” is displayed.
22. Close the cell extender cap securely to prevent any solution
from spilling out. Then agitate and hold. Repeat as prompted.
“P
r
es cal” will display.
23. Press cal to advance to the next titration point. Continue adding
100µL of Reagent H2 or H3 using the pipette, agitating and
holding the unit as prompted, then pressing cal as prompted.
A hardness value will display when the titration measurement
is complete.
24. Note the hardness value for your records or press ms to store
the value. You can begin another Hardness titration by pressing
harD. The unit will automatically power off after the period of
inactivity defined in the AUTO OFF setting (ref. AUTO OFF, pg.
43).
nOte: If there is a gross error in your titration method, e.g., you forgot
to add sample to the cell, “read err” will alternate with “rePt tit”.
Repeat the titration from step 1 to obtain a reading. If the reading is
over range, the display indicates “Or”. If the reading is under range, the
display indicates “0.00”.
g. LSI Calculator Functions
The Ultrameter III features an LSI Calculator that can be used to
perform actual LSI titration measurements or for hypothetical water
balance calculations.
The LSI Calculator computes a Langelier Saturation Index value using
measured, default, or user-adjusted values for alkalinity, hardness, pH
and temperature.
If you have stored alkalinity, hardness or pH and temperature values, the
calculator will automatically display the most recent stored value.