Advanced instruments inc – Analytical Industries GPR-3500 MO Portable Oxygen Analyzer User Manual
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Advanced Instruments Inc.
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The sensor employed by the GPR-3500MO is but one part of the proprietary advancements in sensor technology. It is the only
electrochemical galvanic sensor available that is capable measuring 100% oxygen on a continuous 24/7 basis.
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. Oxygen readings may be recorded by an external device via the 0-1V signal output jack.
Power is supplied by an integral rechargeable lead acid battery which provides enough power to operate the analyzer continuously for
approximately 60 days. Expect 8-10 hours service from a single battery charge when using the pump on a regular basis. An LED
located on the front panel provides a blinking 72 hour warning to recharge the battery. A 9VAC adapter (positive pole located on the
inside of the female connector) can be used to recharge the battery from a convenience outlet. The analyzer is designed to be fully
operational during the 8-10 hour charging cycle which is indicated by a second continuously lit LED.
Sample System
The GPR-3500MO is supplied with panel mounted flow meter for maximum portability. Users interested in adding their own sample
conditioning system should consult the factory. 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