Filter
Top Products
Getting Started Teledyne API – Model T400 Photometric Ozone Analyzer
74
3.5.4.2. Verifying the T400 Reporting Range Settings
While it is possible to perform the following procedure with any range setting, we
recommend that you perform this initial checkout using following reporting range
settings:
Unit of Measure: PPB
Reporting Range: 500 ppb
Mode Setting: SNGL
These are the default setting for the T400 analyzer; however, it is a good idea to verify
them before proceeding with the calibration procedure. Use the same method as
described in Section 3.4.5.1.
3.5.4.3. Initial Zero/Span Calibration Procedure:
Unlike other versions of the T400, analyzers with the IZS option installed do not require
the expected span gas concentration be set during initial start-up because no initial span
calibration is performed.
3.6. CALIBRATION VALVE OPTIONS
3.6.1. AMBIENT ZERO/AMBIENT SPAN VALVES (OPT 50A)
The Model T400 photometric ozone analyzer can be equipped with a zero/span valve
option for controlling the flow of calibration gases generated from sources external to
the instrument. This option consists of a set of two solenoid valves located inside the
analyzer that allow the user to switch the active source of gas flowing into the
instrument’s optical bench between the sample inlet, the span gas inlet and the zero air
inlet.
The user can control these valves from the front panel touchscreen either manually or by
activating the instruments AUTOCAL feature (See Section 9.4).
The valves may
also be opened and closed remotely via the RS-232/485 Serial I/O ports
(see Section 8.2) or External Digital I/O Control Inputs (See Section 9.3.3.3)
06870C DCN6332