Model 1000RS
The AMI model 1000RS portable analyzer is the
industry standard analyzer for spot checking and trouble-shooting trace
oxygen in gas systems. Its elegant design allows it to take a rapid
reading of trace oxygen in a gas sample without long waits for stability
or the danger of damaging its sensor through incorrect operation.
Trace oxygen analyzers are essentially leak
detectors. Portable trace oxygen analyzers have the additional
requirement that they should not be affected while being connected and
disconnected to systems using tubing that - to begin with - is full of
the very oxygen the analyzer is supposed to measure. If a trace oxygen
sensor is exposed to air for any length of time, it will take a long
time to recover back to a low reading, and if it is exposed to air
repeatedly, its life will be affected and its response will get
progressively worse.
The AMI 1000RS uses a special version of the AMI
patented “Cell Block” specifically modified to deal with these problems.
All of the sample system components and the oxygen sensor are mounted
in a single metal block, with drilled passages connecting them. As a
result, the inevitable vibration and disturbance involved in using a
portable analyzer cannot break loose any fittings and the total volume
of the sample system is kept to a minimum. There is a special 4-way
sample selection valve built in to the block that seals off the sensor
when not in use, while allowing the sample to bypass the sensor through
the needle valve and flowmeter. This allows the tubing used to connect
to the sample source to be flushed out before exposing the sensor to the
sample of interest, thus allowing the sensor to respond immediately
when the valve is turned to the “ON” position without a long come-down
time, and safeguarding the sensor from excessive air exposure. The
design also allows for simple and fool proof gas connections using a
single “Quick Disconnect” fitting with no breaking or making of tubing
fittings, and no complicated sequence of plugging and unplugging
connections required.
The AMI model 1000RS is built tough with a welded
powder coated steel case. As usual with AMI analyzers the sensor itself
is immediately accessible behind the front panel and can be replaced
simply and quickly without needing any tools.
This analyzer is intrinsically safe and has been
formally approved by CSA International to UL and CSA standards as
meeting requirements for Class 1, Div. 1, Groups B,C,D with a flammable
gas sample. It is battery powered with up to 350 hours of life, and it
contains a data logger so that it can be left monitoring a gas system
for several days in order to catch intermittent oxygen spikes. The
range over which it logs can be adjusted for best sensitivity. When
completed, simply plug it into a PC through the USB port and use the AMI
software to display the data.
