3
Operation
18
Pump P-960
User Manual 18-1172-73 Edition AA
3.8
Ending the run and storage
If no further runs are planned, Pump P-960 should be flushed
immediately with at least 50 ml of pure, distilled water. If aqueous
buffers have been in use, this is particularly important to prevent salt
precipitation.
Note: If buffers or water are stored at room temperature, there is a risk
that bacterial growth might occur.
3.8.1
Weekend and long-term storage
Flush the pump with at least 50 ml of pure and distilled water and then
fill it with 20% ethanol.
3.9
Changing liquid
When changing from one liquid to another, it is important that the two
liquids are totally miscible with one another. If the two are immiscible,
the pump should be flushed first with an intermediate liquid, which is
miscible with both liquids. Failure to do so will disrupt the flow from
the pump.
3.10 Restart after power failure
If the power to the pump is interrupted, it automatically performs a
selftest when the power is restored. The calibration values are retained.
The default settings for flow rate and pressure limit are reset
automatically. The pump is then ready for operation.
CAUTION!
To prevent precipitation of crystals when changing from a
salt-containing buffer to an organic solvent, always flush the pump
with water as a intermediate liquid.
18117273aa.book Page 18 Thursday, July 3, 2003 5:13 PM