User I/O controls and the TGA interface box

The graphical interface presented in The LI-6878 Scrub Box page uses four of the User I/O controls shown in Figure 12‑60.

Figure 12‑60. The underlying controls for the TGA interface box.

  • I/O-1: In combination with I/O-2, sets source for calibration gases.

  • I/O-2: In combination with I/O-1, sets source for calibration gases.

  • DAC1: Voltage to drier pump (3 volts).

  • Power12: Set to ON to power the TGA box.