Calibration
IV-3
Thermo Scientific Orion 2120XP Calcium Hardness Analyzer User Guide
Warning:
Be sure to follow the procedure for rinsing the flow cell.
1. Open the sample inlet valve, see
A
.
• Position the valve with the pointed end facing up for open position.
2. Open the bypass/needle valve by turning it counterclockwise, see
B
.
• Check for the appropriate sample flow.
• Adjust the pressure regulator if required. See step 3.
3. Adjust the knob on the pressure regulator, see
C
, so the ball in the
flow meter indicates the correct flow rate reading, see
D
. The flow
rate should be adjusted to 40 mL/minute.
• Pull out the knob to unlock the setting and allow adjustment of the
flow rate.
• Turn the knob clockwise to increase the flow rate.
• Turn the knob counterclockwise to decrease the flow rate.
• Push in the knob to lock the setting.
4. Push in the diverter valve on the flow cell.
• The flow cell will begin to fill.
5. Flush the flow cell for 10 to 60 minutes. The sample will drain from
the siphon tube into the siphon drain to the waste.
6. Begin a DKA calibration. Refer to
Chapter IV, Before Performing a
DKA Calibration
.
Rinsing the Flow Cell
50
40
30
20
10
D
C
B
A
Figure IV-2