Teledyne 9110E - Nitrogen Oxides Analyzer - Manual (Page 51)

Model 9110E Instruction Manual Optional Hardware and Software
M9110E Rev B 37
Figure 5-2: Current Loop Option Installed on the Motherboard
5.5. Particulate Filter Kit (Option 42A)
This option includes a one-year supply of 50 replacement, Teflon membrane, particulate
filters, 47 mm in diameter, 1 micrometer pore size.
5.6. Calibration Valve Options
5.6.1. Zero/Span Valves (Option 50)
The Model 9110E NO
x
analyzer can be equipped with a zero/span valve option for
controlling the flow of calibration gases generated from external sources. This option
contains two solenoid valves located inside the analyzer that allow the user to switch either
zero, span or sample gas to the instrument’s sensor. The user can control these valves from
the front panel keyboard either manually or by activating the instrument’s CAL or AutoCal
features (Section 7.8). The valves may also be opened and closed remotely through the
serial ports (Section 6.9) or through the external, digital control inputs (Section 6.8).
This option also includes a two-stage, external zero air scrubber assembly that removes all
NO and NO
2
from the zero air source (ambient air). The scrubber is filled with 50% Purafil
Chemisorbant ® (for conversion of NO to NO
2
) and 50% activated charcoal (for removal of
NO
2
). This assembly also includes a small particle filter to prevent scrubber particles to
enter the analyzer as well as two more rear panel fittings so each gas can enter the
analyzer separately.
Figure 3-12 shows the internal, pneumatic connections for a Model 9110E with the
zero/span valve option installed. Table 5-1 describes the state of each valve during the
analyzer’s various operational modes.