OLS CASY TT - Background too High

51
Troubleshooting
. Background too High
During regular use, weekly cleaning procedures with CASY clean are recommended to avoid prob-
lems with high background (see section Maintenance and Care).
If the background is too high, try to reduce it via the following procedures, checking after each step
if the problem is resolved:
1
Ensure that only freshly ltered CASY ton is used. Best use a dispenser equipped with an appropriate
lter ( OLS Cat. No. 05651751001).
+ For the 150 μm capillary the recommended pore size is ≤ 0.8 μm.
+ For the 60 μm capillary and the 45 μm capillary the recommended pore size is 0.45 μm.
2
Ensure that measurements are not being executed with distilled water or CASY clean.
Use only CASY ton for measurements.
3
Ensure that no electronic systems causing strong electromagnetic elds or any radiation are located
beside the CASY Instrument.
4
Ensure that no equipment causing strong vibration is located on the same table with the CASY Instru-
ment.
5
Check if the background decreases if no cleaning cycle is started, but only a measurement with a new
CASY cup containing freshly ltered CASY ton.
+ Repeat this step twice and record the results. If the background is correct in this case, the CASY
ton in the storage container (right hand side of the capillary) may be contaminated.
+ Discard the CASY ton in the storage container.
+ Flush the storage container and rell it with freshly ltered CASY ton.
+ Run three cleaning cycles followed by a measurement with a new sample cup. If the background
is not correct then, the internal uid system may be contaminated and needs cleaning or a
maintenance service.
+ For cleaning the uid system run the weekly cleaning procedure (see section Maintenance and
Care).
6
Ensure that no electronic systems causing strong electromagnetic elds or any radiation are located
beside the CASY Instrument and check if the sample chamber was shielded during the measurement
using the protection shield.
7
In case the described steps are not successful, contact your OLS representative for maintenance
service by an OLS service technician.

Background too High