Accuracy Tests - CADD Legacy Plus 6500 Operator's Manual

Accuracy Tests

Gravimetric Accuracy Testing
Description
A Medication Cassette Reservoir is partially filled with water and
weighed, then attached to a pump that is set to deliver a certain
amount of water. The Medication Cassette Reservoir is then removed
and weighed again. The amount of water delivered is compared to the
amount that the pump should have delivered.
Nominal system accuracy is given in the technical specifications section
for the pump. That is, under the test conditions described below, the ac-
curacy of the pump and Medication Cassette Reservoir will be nominal
with a 90% confidence level. The nominal test conditions are as follows:
degassed water at 25 ± 5°C without back pressure.
Equipment needed
50 or 100 ml Medication Cassette Reservoir with attached CADD™
Extension Set with Anti-Siphon Valve OR
50 or 100 ml Medication Cassette Reservoir with flow stop feature
with attached CADD™ Extension Set (catalog numbers start with
21-73xx)
50 or 60 ml syringe
A balance accurate to 0.1 g
40 ml of room temperature water
Procedure
1. Fill the 50 or 60 ml syringe with 40 ml of water. Transfer the water
into a Medication Cassette Reservoir.
2. Remove any air from the Medication Cassette Reservoir by aspi-
rating the air with the syringe. Attach the CADD™ Extension Set.
Prime the tubing so it is filled with fluid to the end of the extension
set Luer.
Section 5: Reference