113
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 3TATUSINDICATORS
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 3ENSOR2EADING4HECURRENTSENSORRESPONSEINMILLI6OLTS
s $EVIATION#HANGEINSENSORRESPONSEBETWEENTHELASTTWOREAD
-
ings.
s #URRENTTEMPERATUREISALSODISPLAYED
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
LEAST½#!CONVENIENTWAYTODOTHISISTOMOVETHEPROBE#AL
Cup and all—into a temperature-controlled bath or container of
ice. Allow time for the sensor to reach thermal equilibration with
the solution temperature. With stirring or agitation, this should take
about 10 minutes, perhaps up to 30 minutes if left undisturbed.
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.
17
10
SECTION 16: CHLORIDE