Bio-Rad Model EP-1 Econo Pump - Manual (Page 11)

Diverter Valve Output This 8-pin outlet sends a signal to the
Model SV-3 diverter valve, to divert
flow between collection devices.
Auxiliary Output This 8-pin connector is for communi-
cation with the Model EM-1 Econo
UV Monitor and the BioLogic System.
4.3 Pump Base Features
The base of the Model EP-1 Econo Pump contains a 40-pin connector
for connection of the Econo Pump to the (discontinued) Econo System
Controller. This connector is not currently used with any systems sold by
Bio-Rad Laboratories, and should remain unused.
Section 5
Tubing Selection and Installation
5.1 Tubing Selection
The Model EP-1 Econo Pump may be used with most flexible tubing
having an inner diameter less than or equal to 3.2 mm (1/8"), and a wall
thickness of 1.0 mm or less, including silicone, Tygon, and PharMed.
Silicone tubing, the most inert of the three, is suitable for aqueous and polar
solutions. Tygon is suitable for most aqueous solutions. It will generally
have the shortest lifetime of the three. PharMed is the longest lasting of the
three, and will provide the most consistent flow rate over time. Table 5.1
shows approximate flow rate ranges with different tubing sizes. Flow rates
above 20 ml/min may be obtained by plumbing two channels of 3.2 mm
tubing through the pump and joining them at the output.
Table 5.1. Approximate Flow Rate Ranges
Tubing length and the amount of tubing prestretch have a significant
effect on both flow rate calibration and reproducibility of flow. The PharMed
tubing supplied with the Econo Pump has been cut to a predetermined length
to accommodate tubing prestretch. (Silicon tubing in precut lengths is also
available from Bio-Rad. See ordering information in appendix C.)
0.1 .2 .3 .4 .5 .6 .7 .8 .9 1.0 2 3 4 5 6 7 8 9 10 20
ubing Size
D x Wall)
0.8 mm
1.6 mm
3.2 mm
Flow Rate Range ml/min
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