5 - Maintenance
Periodic Maintenance
Cavro® XLP 6000 Modular Syringe Pump Operating Manual, 734237-C, en
5 - 3
If any of these symptoms occurs and it is not obvious which component is causing
the problem, it is easiest and most economical to replace one component at a
time in the following order:
1
input and output tubing
2
plunger seal
3
valve
The frequency of replacement will depend on the duty cycle, fluids used, and
instrument maintenance.
5.3.1
Quality Control Assurance
Check the accuracy and precision of the XLP 6000 on a regular basis.
Tecan Systems recommends checking both accuracy and precision
gravimetrically, using an analytical balance with the capability to measure to 0.1
mg. Gravimetric measurements should be corrected for the specific gravity of
water at the ambient temperature.
The syringe can be checked by programming in the desired volume and
determining the weight of fluid dispensed.
To determine precision and accuracy, run a minimum of 20 replicates. The Mean,
Standard Deviation and Coefficient of Variation (see formula below) can then be
calculated. The calculations to determine accuracy must take into account the
specific gravity of water, which is dependent upon temperature. In addition, to
prevent a false reading caused by fluid adhering to the tip of the aspirate tubing, a
small amount of surfactant should be added to the water (e.g., Fluorad
®
at a
0.01% concentration).
