Merck Millipore Mobius Chrom 20 System User Manual page 170

170
Procedure for Conductivity Calibration
Conductivity calibration can be performed manually from the touch screen or automatically
using an operation. Manual actions are performed using the Gradient Conductivity Calibration
and Gradient Percentage Calibration windows.
1. Setup the desired flow path.
2. Enable the gradient control loop and select Speed control mode.
3. Run the pumps at 100% primary at a desired speed until the conductivity value stabilizes.
4. Select Save Primary Conductivity from Auto Cal or use the "Gradient Save Primary Inlet
Conductivity" recipe action. This will store the conductivity value of the primary solution.
5. Run the system at 0% primary at a desired speed until the conductivity value stabilizes.
6. Select Save Secondary Conductivity from Auto Cal or use the "Gradient Save Secondary
Inlet Conductivity" recipe action. This will store the conductivity value of the secondary
solution.
7. Enter the total number of segments desired for the calibration profiles or use the "Gradient
Percent Total Segments" and Gradient Conductivity Total Segments" recipe actions.
8. Run the system at the first segment percentage until the conductivity value stabilizes.
9. Select Calibrate Segment or use the "Gradient Conductivity Calibrate Segment" recipe
action. The system will record the control value and the conductivity value and will
automatically enter the values into the conductivity calibration table. The control value and
actual percentage value will also be recorded into the percentage calibration table.
10. Repeat step 8 and 9 for each segment percentage.
11. When complete, select conductivity calibration On and percentage calibration On or use the
"Gradient Conductivity Calibration On" and "Gradient Percent Calibration On" recipe actions
Single-use Flowmeters
To achieve the best accuracy on the flow measurement, it's important to enter the K factor into
the HMI for each SU flowmeter tube. The K factor is written on the label attached to each SU
flowmeter tube. The operation needs to be performed each time a new SU flowmeter tube is
installed into the transmitter.
Click the flow control
Click the K factor value and enter the value indicated on the SU flowmeter tube label.
Caution When entering K factor please check that it is the correct flowmeter faceplate.
User Guide