Myron L 9PTK - Manual (Page 21)

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7. Carefully remove the T-plunger so as not to flick or spill remaining
sample. Tap the T-plunger on the side of the cell extender to
remove sample that may be stuck to the T-plunger.
8. Press . “ca” alternating with “tds” displays along with
“PPm” sample value. “P
r
es cal” displays when the reading
stabilizes.
9. Press cal. “add” alternating with “c1” will display; then “agit”
alternating with “hOld” will display.
10. Using the pipette, add 100µL of Reagent C1 to the sample,
close the cell extender cap securely, then agitate and hold.
Repeat as prompted. “OPe
n
caP” alternating with “P
r
es cal”
will display.
11. 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.
12. Press cal to start 120 second timer. The display will count
down from “120” to “0”, allowing time for CO
2
to escape. Using
your index finger, firmly tap the side of the instrument closest
to the conductivity cell to release any CO
2
bubbles clinging
to the conductivity cell/cell cup extender wall. This effectively
reduces any bicarbonate alkalinity in the sample and prepares
it for titration. After 120 seconds, “add” alternating with “h1
1” will display. (The “1” indicates the first addition of sodium
hydroxide.) Then “agit” alternating with “hOld” will display.
13. Change the pipette tip.
14. Using the pipette, add 100µL of Reagent H1 to the 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.
15. Press cal. “add” alternating with “h1 2” will display. (The
“2” indicates the second addition of sodium hydroxide.) Then
“agit” alternating with “hOld” will display.
16. 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.
17. Using the pipette, add a second 100 µL of Reagent H1 to the