Ametek WDG-V, Руководство пользователя

Страница: 44 / 131

PN 9000-133-VE, Rev U
Combustibles RCU Installation
Figure 2-9.2 shows mounting dimensions for the Combustibles RCU. Mount
the RCU as close to the analyzer as possible. Shorter calibration plumbing
improves response times, reduces calibration gas expense, and reduces the
chance of contaminants in the calibration gas plumbing. The ambient tem-
perature range for the combustibles RCU is -20 °C to 70 °C.
Make the following calibration gas connections to the combustibles RCU (see
Figures 2-10.1, 2-10.2, and 2-10.3 for various Flow Diagram configurations):
1. Connect the O
2
span gas, if other than instrument air, to the alternate O
2
span gas inlet.
2. Connect the O
2
zero calibration gas to the O
2
zero gas inlet connection on
the RCU.
3. Connect the combustibles span calibration gas to the combustibles span
gas inlet on the RCU (Figures 2-9.2 and 2-10.2). For a WDG-VCM analyzer
with RTD-type combustibles detector, the combustibles span calibration
gas would also include the methane span calibration concentration (Figure
2-10.3).
4. Using appropriate tubing, connect the calibration gas outlet on the right
side of the RCU to the calibration gas inlet on the analyzer (see Figure 2-12)
for analyzer calibration gas inlet connection.
5. Using appropriate tubing, connect the Aspirator air outlet on the right side
of the RCU to the Aspirator air inlet connection on the analyzer.
Figure 2-10.1.
RCU flow diagram (Single Span).
2-18 | Thermox
®
WDG-V / VC / VCM / VM