VICI 235 Dynacalibrator - Manual (Page 24)

20
Analyzer Calibration
When the power-up procedure is completed and the chamber temperature, flow,
and permeation device have reached equilibrium, the system status indicator in
the lower left hand corner of the display will give a "Ready" (green) status. This
indicates that the Dynacalibrator is ready to be connected to the analyzer to be
calibrated.
Use a minimum length of tubing for the connection, and ensure that all of the
Dynacalibrator’s vents are open.
If the Model 235 is to be used for a multipoint calibration:
Manual Mode
1. Adjust the dilution flow on the Manual screen for each of the pre-calculated
span points. After each flow change, the status indicator will be red (not ready)
for an equilibration period before returning to green (ready).
2. Upon completion of the range of dilutions for the calibration, remove the
permeation device from the oven, reseal the oven, and allow it to equilibrate
until the status indicator turns green (ready).
3. Run this final point in your instrument calibration as the ZERO point for your
calibration curve.
hINT: Running your concentration curve from highest to lowest concentration
is the preferred method to approach Step 3 in this procedure.
Auto Mode
1. From the Auto screen, input the concentration required for the calibration
point.
2. Enable the change, and wait for the Ready status.
3. Run the analyzer at the calibration point. After the last calibration level, skip
to step 5 to run the Zero level.
4. Repeat steps 1 - 3, moving from the highest concentration to the lowest
concentration.
5. Let the permeation oven and cool, and remove permeation device. Reseal the
oven.
6. go to the Tubes screen and select ZERO as a compound, and enter “0” ng/min.
Do not change the temperature. Select the “Add” button.
7. go to the Auto screen and select compound ZERO. Enter “0” in the concentra-
tion field. Allow time for equilibration and the Ready status indication.
8. Run the analyzer at the Zero point.