Thermo Scientific SOLA II Flare, Руководство пользователя

Страница: 19 / 164

Thermo Scientific SOLA II Flare User Manual 1-1
Chapter 1: Product Overview
The Thermo Scientific SOLA II Flare sulfur online analyzer combines proven
detection technology, easy-to-use, menu-driven software, and advanced
diagnostics to offer unsurpassed flexibility and reliability. The instrument offers
field programmable ranges, high sensitivity, total sulfur measurement, fast
response time, linearity through all ranges, and low consumables.
Function
Major components of the SOLA II Flare include a sample injection valve,
carrier gas flow control system, mixing chamber, pyrolyzer, and a pulsed
ultraviolet fluorescence (PUVF) detector.
The SOLA II flare is a single assembly with one software program and one user
interface. The SOLA II Flare is a specialized version of the widely used SOLA II
total sulfur analyzer. The SOLA II Flare is specially configured to accommodate
the wide variety of sample conditions that can be experienced when monitoring
flare systems, and is suitable for analyzing over a dynamic range of 10 ppm to
100% sulfur by volume using a single analyzer system.
To meet this dynamic measurement range, the SOLA II Flare uses dual PMT
(photomultiplier tube) power supplies and dual sample injection valves to
achieve two independent measurement ranges. The low measurement range is
configured as 1% of the high measurement range. For example, a high
measurement range of 50% (500,000 ppm/v) will set the low range at 5,000
ppm/v. The SOLA II Flare software will automatically select the appropriate
measurement range based upon the sulfur output level being measured and will
select the appropriate PMT power supply and sample injection valve for the
measurement range.
The PUVF (pulsed UV fluorescence) detector utilizes a PMT to measure the
SO
2
present in the measuring cell. The sensitivity of the PMT is adjusted by the
supplied voltage. Using dual power supplies allows the sensitivity of the two
measurement ranges to be set independently. By utilizing two sample injection
valves, the SOLA II Flare provides precise control of the amount of the sample
that is injected as well as control of the dilution ratio (typically 100:1) between
the two injection valves. For the low measurement range, a 100 μl sample loop
is used and for the high measurement range a 1 μl sample loop is used. This
allows approximately the same amount of total sulfur to be injected into the
detector no matter which measurement range is in use.