In-Situ TROLL 9500 Operators Manual - Manual (Page 82)

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TROLL 9500 Operator’s Manual 0095110 rev. 007 01/09
10. In the next screen, select Run to begin the stabilization.
The display will continuously update as readings are taken and
compared against the stabilization criteria.
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NOT TESTED is displayed until you begin the calibration by
selecting Run.
UNSTABLE indicates the sensor response does not meet the
criteria for a valid calibration point.
NOMINAL indicates the sensor deviation meets early stabiliza-
tion criteria.
The Accept button becomes available when nominal stability is
achieved. You may accept the early value, or wait for complete
stability. If you accept the early value, the calibration point will
be designated “USER SET” in the calibration report. (For more
on calibration reports, see “Calibration History” in Section 10.)
STABLE is displayed when the readings have stabilized suffi-
ciently to take a valid calibration point. The calibration proceeds
automatically to the next screen.
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tion.
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readings. This enables you to follow the progress of the stabiliza-
tion, but deviation from the previous reading is not necessarily the
best indicator of stability as the software is looking at longer-term
trends.
11. The final screen shows the new cell constant (Kcell) calculated for
the selected range during the calibration process.
Typical cell constants:
Low-range sensor
0.32 – 0.39
High-range sensor 4.4 – 5.8
The displayed cell constant may be edited.
12. Select Finish to program the sensor with the displayed cell con-
stant.
TIP: You can look at the calibration report right after
calibrating, or at any time. See “Calibration History” in
Section 10 for details.
The conductivity sensor is now calibrated and ready to use in the
range for which it was calibrated.
TIP: The calibration solution may be flushed down the drain
with running water, or saved in a separate container and
used to rinse the sensors the next time you calibrate with the
same solution.
Options for storing sensors:
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installed in the MP TROLL 9500. The conductivity sensor does not
require any special storage conditions, but other sensors do. Refer
to the relevant sections of this manual for storage recommenda-
tions for other installed sensors.
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and store it dry.
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SECTION 12: CONDUCTIVITY