In-Situ Aqua TROLL 100 and 200 Operators Manual - Manual (Page 54)

Page 54 Aqua TROLL Operator’s Manual
If the cell constant is out of
range, the cause could be
an air bubble, incomplete
rinsing, sensor fouling, or
other factors. Repeat the
preparation and calibration
with fresh cal solution.
9. When you are satisfied with
the proposed cell constant,
click Commit to write the
calculated cell constant to
the sensor.
10. If the Aqua TROLL will be
deployed immediately,
remove it from the Cal Cup, rinse it, discard the calibration
solution, and reinstall the black nose cone. Otherwise,
store it wet in the Cal Cup (in cal solution or water) for later
deployment.
TIP: If the proposed
cell constant is
outside the range
0.98 – 1.02, check conditions
and repeat the calibration.
Section 5: Conductivity
Nominal Stability vs. Full Stability
To meet the criteria for a valid calibration point, the change in sensor
response is monitored over time. The software is looking for the
calibration solution temperature and the sensor readings to settle
over a specific time period. The criteria for Full Stability are designed
to meet the published specifications. The criteria for Nominal Stability
are designed to shorten the calibration time when an approximate
calibration is acceptable.
TIP: A change
from an earlier cell
constant of 0.02
suggests that the calibration
should be repeated.
CALIBRATION
(continued)