ATI
Model A15/82 Fluoride Monitor with Auto-Calibration
22
O&M Manual
Rev-G (6/10)
AUTOMATIC CALIBRATION VALVE
A 2-way pinch valve is mounted on the bottom of the chemistry module between the sample and reagent
pumps. This valve is not required for operation, but is used to automatically switch calibration standard into the
measuring cell when called for by the monitor. Tubing from the calibration standard is routed through the bottom
section of the pinch valve (normally closed) and then into a “Y” fitting prior to the reagent injection point. To
adjust tubing in the pinch valve, you may push on the bottom of the valve to manually pinch off the top tube and
open the bottom tube. Tubing should be permanently connected to the fluoride standard bottle as shown in
Figure 1.
