Bio-Rad ChromLab™ Software - Manual (Page 278)

C | Plumbing the System
276 | NGC Chromatography Systems and ChromLab Software
To plumb the buffer blending valve
 Connect the inlet tubing to ports Q1–Q4 on the buffer blending valve.
Note: The buffer inlet tubing is color-coded to identify the different buffer
solutions.
The color scheme for the tubing and ports is defined as follows:
To plumb the pH valve
1. Connect the pump head wash priming tubing to the Cal In port on the pH valve.
2. Connect waste tubing to the Cal Out port on the pH valve.
Tubing color Port Solution
Green Q4 High salt buffer
Yellow Q3 Water
Blue Q2 Buffer base
Red Q1 Buffer acid