Advanced instruments inc – Analytical Industries GPR-2600 Series Oxygen Analyzer User Manual
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Advanced Instruments Inc.
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Electronics
The signal generated by the sensor is processed by state of the art low power micro-processor based digital circuitry. The first
stage amplifies the signal. The second stage eliminates the low frequency noise. The third stage employs a high frequency filter
and compensates for signal output variations caused by ambient temperature changes. The result is a very stable signal.
Sample oxygen is analyzed very accurately. Response time of 90% of full scale is less than 10 seconds (actual experience may
vary due to the integrity of sample line connections, dead volume and flow rate selected) on all ranges under ambient
monitoring conditions. Sensitivity is typically 0.5% of full scale low range.
Additional features of the micro-processor based electronics include manual or auto ranging, auto-zero and auto-cal, isolated 4-
20mA signal for signal output and range ID, separate relay contacts rated 30VDC max @ 1A are provided for the alarm feature
and an optional range ID feature (auto-zero/auto-cal with relay contacts for Range ID is special order, so . Whenever the
analyzer is calibrated, a unique algorithm predicts and displays a message indicating a ‘weak sensor’ suggesting the sensor be
replaced in the near future.
Sample System
The sample must be properly presented to the sensor to ensure an accurate measurement. In standard form the GPR-2600 is
designed with a sample system that enables the user to control the flow rate via a flow meter positioned upstream of the
sensor. The sensor is exposed to sample gas that must flow or be drawn through the analyzer’s internal sample system.
Advanced Instruments Inc. offers a full line of sample handling, conditioning and expertise to meet your application
requirements. Contact us at 909-392-6900 or e-mail us at