CheckPoint Pharma and CheckPoint
e
Operation and Maintenance Manual
SUEZ © 2018 78 of 112 DLM 97200-03 EN Rev. A
12. To verify the new flow rate calibration, empty the cylinder and replace the flow rate calibration
drain tubing in the cylinder. The Sensor will pump water again for 5 minutes; the volume should
be close to 5 mL. Press F1 to accept the new flow rate calibration.
There are no formal pass/fail criteria for the flow rate calibration, but SUEZ recommends that the
calibration be accepted if the volume collected during the second five-minute test is between 4.8
and 5.2 mL.
13. After flow rate calibration is complete, disconnect the tubing from the Waste port and reconnect
the standard waste tubing.
Conductivity Calibration
Conductivity calibration should be performed after replacing the pump head if the Sensor is used for
conductivity or resistivity measurements. Conductivity calibration is not necessary for low level
applications where conductivity or resistivity values are not being used (conductivity <0.10 μS/cm or
resistivity >10 M with TOC < 20 ppb).
Remove the conductivity calibration standards from the refrigerator and allow them to warm to room
temperature (~ 1 hour) before starting calibration. Then, follow these steps:
1. Press the button.
2. Press F1 to select the Mode screen.
3. Press F1 to select Calibration.
4. Press F2 to select Conductivity.
5. Press F1 to select Conductivity Calibration.
6. Insert the 25 µS/cm HCl standard into the vial port.
7. Press F1 to start conductivity calibration. Sample is flushed through the Sensor and
measurements on the HCl solution begin.
When measurements are complete, the Sensor displays the mean measured and adjusted
temperature-corrected conductivity values. Press F1 to accept the calibration of F4 to cancel.
If a printer has been installed, the CheckPoint will print the results of each measurement upon
completion.
SUEZ recommends that the calibration be applied if the average values are between
24-26 μS/cm and the RSD is 0.5% or less.
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