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Teledyne API – Model T400 Photometric Ozone Analyzer Getting Started
79
The state of the Sample/Cal valves can be controlled:
Manually via the analyzer’s front panel;
By activating the instrument’s AutoCal feature (See Section 9.4);
Remotely by usin
g the External Digital I/O Control Inputs (See Section 9.3), or;
Remotely via the RS-2
32/485 Serial I/O ports (See Section 8.2).
Table 3-10: Internal Zer
o/Span Valve Operating States
Option Mode Valve Condition
Sample/Cal Valve Open to SAMPLE inlet
SAMPLE
Ozone Generator OFF
Sample/Cal Valve Open to Ozone Generator
ZERO
CAL
Ozone Generator OFF
Sample/Cal Valve Open to Ozone Generator
50G
SPAN
CAL
Ozone Generator ON at intensity level set by user
06870C DCN6332