Help, my CASY is on strike …
1. Don't panic … 2. The CASY is well known, for - unless you throw it out the window - its robustnes and that it forgives also most operating errors. If it remains still on strike, there are usually a few little things which, you can fix yourself. So please do not feel surprised, when you call our service and the first question is, whether the power is switched on or not. At least 20% of all service cases are already resolved by then. ;-)
But there are some more frequently occurring situations. Often they relate to the handling of the liquid system. Of course, it is mandatory, that the recommended cleaning, once per week, has been performed overnight.
The display of my CASY Model TT is either completely dark or very bright and I cannot see anything on the display.
- Check the CAYS®blue, whether the dial on the right side of the control panel was inadvertently turned. Turn clockwise or counter-clockwise for achieve a setting, which is best for reading the display from your viewing angle.
- Are all plug connections in order?
I have started a measurement, but forgot to put my sample under the capillary. Is that critical or possibly even dangerous?
- Yes, , such may be critical, because there is a risk, that CASY®ton contained in the fluidic system is sucked into the dry region of the pressure system due to the lack of back-pressure and this can lead to deposition of salt crystals in the tubes or even in the valve seats.
If this happens the best way out is to immediately rinse the system with distilled water according to the last step in the weekly cleaning routine description and then execute the command "Dry Liquid System" from the service menu (see Training Guide). This ensures that all liquid residues are removed from the pressure system.
The CASY system has not been used for a long time and now seems to have dried out. Upon starting a CLEAN cycle, the system is not filled with liquid
- You can try to rinse the tube going into the CASY®ton container with a 10-20 ml syringe filled with distilled water, build up some pressure and then perform a CLEAN cycle. Once you hear, that the pump starts, apply slight pressure, to get liquid into the system. If you notice, that the system accepts the liquid, release pressure and upon completion of the CLEAN cycle, put a CASY®cup with distilled water under the aspiration tube and test, whether the liquid is aspirated now even without external pressure. In addition, it can also happen that the liquid path to the waste container is clogged, so that the liquid system cannot be emptied. In this case, attach an empty 10 ml syringe to the waste tube and apply vacuum as soon as the pump starts working. You may need some patience and repeat the rinsing several times with distilled water. If all else fails, the only way out is to have a maintenance service carried out, which is anyway recommended every two years.
The capillary remains blocked even after performing several Clean cycles
- This means, that some coarse particles or crystals have blocked the capillary. The only way to remove them is to dismantle the capillary (see Training Guide) and put the capillary into a 50 or 100 ml beaker, filled with about 1 cm of CASY®clean, for cleaning. Furthermore you need a normal small ultrasonic bath. Place the beaker with the measuring capillary in it into the bath for about. 15 seconds. Before re-installing the capillary, use a syringe filled with distilled water , to press liquid through the capillary. The liquid jet should leave the pore in a straight thin jet of liquid. If not, you may need to repeat the sonication several times, but not more than 20 sec per sonication.
- Attention: Never leave any capillary under sonication for longer than 20 seconds
Finally, once cleaned successfullly, reinstall capillary and start up the system following the weekly cleaning routine by rinsing with distilled water.
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