Thermo Scientific Dionex ICS-2000, Operator'S Manual

Page: 117 / 390

5 • Service
Doc. 031857-03 4/06
5-7
10. Select
1.00 mL/min
to begin pumping 1.00 mM KCl through the cell
at 1.0 mL/min.
11. Wait until the total conductivity reading stabilizes (in about
15 minutes) and then select Calibrate on the Wellness Panel or the
touch screen
CONDUCTIVITY CELL
page.
After calibration, the conductivity reading should be 147.00 ± 2
µ
S
and the cell constant should be between 120 and 180. If this is not the
case, contact Dionex for help.
12. If you are using the Wellness Panel, click Log to record the new
calibration values in the Audit Trail.
13. If you are using the ICS-2000 touch screen, record the new
calibration values in the Chromeleon Wellness database. To do this,
open the Wellness Panel (see
Section 5.1.1 ) and click Upload under
Update Wellness Database .
14. Flush the KCl solution from the system by pumping deionized water
through the cell. When the conductivity drops to less than 1
µ
S/cm,
stop the pump.
15. Reconnect the pump to the injection valve and reconnect the line
from the suppressor to the cell inlet.
5.1.4 Calibrating the Flow Rate
When to Calibrate
If you run the ICS-2000 Operational Qualification or Performance
Qualification and it fails.
Items Needed
•
0.076-mm (0.003-in) ID yellow PEEK tubing (P/N 049715) to create
14 ± 2 MPa (2000 ± 300 psi) of backpressure (if needed)
•
High purity ASTM filtered, Type I (18 megohm-cm) deionized water
•
Balance capable of weighing more than 10 g with 0.001 g readability
•
Tared beaker