![REPLIGEN XCell Lab XC-LAB-D Скачать руководство пользователя страница 48](http://html1.mh-extra.com/html/repligen/xcell-lab-xc-lab-d/xcell-lab-xc-lab-d_user-manual_1443416048.webp)
XCell™ Lab Controller
User Guide
48 repligen.com XC-LAB-UG-V4
•
Type of cell line used:
Fragile cell lines or cultures inoculated at low cell concentration may
require gentle start-up using low ATF rates. As cells begin to grow and adapt, flow rates can
be increased (i.e. to characterize the cells shear sensitivity).
When a less shear-sensitive cell line is used, higher ATF rates may be used.
Note:
ATF2 is unique since it is capable of a maximum flow rate of 1.5 LPM, yet for scale-up
considerations, ATF2 rate should not exceed 0.9 LPM. Please refer to Repligen’s Engineering
Scale-up Guide for additional details, which is available from your local FAS.
•
Harvest or filtration rate
:
Generally, higher filtration rates require higher ATF flow rates. The
maximum filtration rate depends on the size of the filter relative to the process conditions,
while the minimum filtration rate depends on the requirements of the cell culture. If the
filtration rate is too high compared to the ATF Flow Rate, the filter would likely foul faster.
General guidelines for ATF Flow rate and Filtration rate ratio are shown in the table below.
Table 15. Recommended ATF rate to Filtration rate ratios
Application
ATF Rate Ratio
Filtration Rate Ratio
Perfusion (> 30d) or CFB
100 - 200
1
High Productivity Harvest
50 - 150
1
N-1 Perfusion, or Cell Expansion
50 - 100
1
Short Duration Diafiltration
10 - 50
1
Rapid Media Exchange, Clarification or
Cell Concentration
10 - 50
1
Note:
Many factors influence the optimum ATF Rate as well as the ratio. The default settings work
for most applications, but please feel free to contact your local FAS to discuss your unique
process needs.
9.
Troubleshooting
If your issue is not listed or resolved in the following scenarios, please contact the Bioprocess
Account Manager as the first point of contact.
Refer to
for a comprehensive list of alarms and their triggers, which can be helpful in
troubleshooting.
Controller will not turn on
Make sure the power cord to the controller is connected properly and fully inserted into a power
outlet.
The HMI is not communicating with the controller
Check if the ethernet cable is properly connected to the USB/ethernet adapter, and the
USB/ethernet adapter connected properly to the tablet.
The IP address may be incorrect, please see
ATF Flow rate is higher/lower than expected
The controller is accurate to at least -10% of the setpoint. If the flow consistently exceeds
this range, a correction must be made:
1.
Incorrect flow measurement. This could be due to sensor placement on the tube, use of
incorrect tubing or presence of large air bubbles in the A2B line (see below). Please check if
each of these are working properly.