In-Situ TROLL 9500 Operators Manual - Manual (Page 76)

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TROLL 9500 Operator’s Manual 0095110 rev. 007 01/09
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5. Select the MP TROLL 9500 in the Navigation tree.
The software will automatically detect and display the installed sen-
sors. If one or more sensors is installed in the wrong port, an error
message will be displayed. Simply remove the sensor and install it
in the correct position, then “refresh” the device before continuing.
6. Click to select pH in the Parameters list. The sensor serial number
(SN) and recent calibration information is displayed.
7. Select Calibrate to launch the pH Calibration Wizard. A screen like
this is displayed.
8. Select the number of calibration points for this calibration, and the
pH value of the calibration solution for each point. Cal point 1 is
the solution the sensor is soaking in now.
9. Select Next to continue.
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.
11. If doing a one-point calibration, go to step 14.
For a multi-point calibration, the Wizard returns to the screen
shown at step 10 and waits for you to situate the probe in the next
calibration solution and click Run.
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SECTION 11: PH
Indicators during Calibration
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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 stabilization
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 sufficiently to
take a valid calibration point. The calibration proceeds automatically to
the next screen.
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readings. This enables you to follow the progress of the stabilization,
but deviation from the previous reading is not necessarily the best
indicator of stability as the software is looking at longer-term trends.