In-Situ TROLL 9500 Operators Manual - Manual (Page 118)

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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.
s
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.
s
s
ings.
s
11. If doing a a single-point calibration, go to step 16.
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.
12. Remove the Cal Cup, discard the first solution, rinse the Cal Cup
and the front end of the instrument in clean water, followed by a
rinse in the next calibration solution, refill the Cal Cup with the
second solution, and attach it to the instrument.
TIP: The used calibration solution may be flushed down the
drain with running water, or saved in a separate container
and used as a rinse the next time you calibrate with the
same solution.
13. Select Run to begin the stabilization for cal point 2. Status indica-
tors and controls are the same as for cal point 1 (step 10).
Again wait for Stable status (or click Accept when Nominal is
indicated).
If doing a two-point calibration, go to step 16.
14. For the third calibration point, use the cal point 1 or cal point 2
solution (as specified in step 8) but change the temperature by at
LEAST
15. When the temperature is stable, select Run for cal point 3.
When Nominal is accepted or Stable is indicated for cal point 3,
the final screen is displayed.
16. The final screen of the Calibration Wizard shows the calculated
sensor slope and offset. For a three-point bithermal calibration,
the isopotential point is shown. If a single-point calibration has
been performed, the isopotential point is the one calculated during
the last three-point bithermal calibration.
17. Select Finish to program the sensor with the newly calculated
calibration coefficients.
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SECTION 16: CHLORIDE