Ametek WDG-V UOP, Руководство пользователя

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PN 9000-280-VE, Rev B
The major components of the sample system and other key components and
their functions are detailed below (see Figures 1-2 and 1-3). The components
listed below are for a variety of analyzer configuration possibilities. The sample
system consists of:
Component Function
RTD Flow Sensor The RTD flow sensor monitors the sample flow through the fast
loop as well as the temperature of the gas flowing past it.
An alarm is generated when the temperature reaches 100 °C
lower than the temperature set during normal operation. This
alarm indicates that flow has slowed or stopped.
Temperature Zones and
Heaters
The temperature zones in the analyzer are tightly controlled by
the oxygen Cell temperature heater. The Cell heater is a 300 W
coil heater surrounding the Cell Housing and providing precision
heat to the oxygen Cell.
The box temperature is controlled with an RTD mounted on
the aspirator block. The box heater consists of two (2) 150 W
cartridge heaters located in the aluminum heater block at the
bottom of the aspirator. This heater provides the heat for the
enclosure to maintain all plumbing components above 225 °C.
Cell Temperature:
The oxygen Cell is controlled to 680 °C. The Cell temperature is
measured by dual Type “K” thermocouples. Dual thermocouples
are used for self-check of the Cell temperature. The thermocou-
ples are side-by-side in a single assembly. There is no distinction
between the two thermocouples.
Flame Arrestors The WDG-V UOP analyzer contains two flame arrestors to
prevent the analyzer from becoming an ignition source for the
process when there are short periods of high combustible levels
(25 % of LEL – Lower Explosive Limit) in the process. The flame
arrestors are not, however, intended to protect the process when
the combustibles’ levels are constantly high.
Figure 1-3.
RTD Flow Sensor.
Overview
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