GPR-2600 Series Oxygen Analyzer - Advanced Instruments Inc.

Advanced Instruments Inc.Optional - Temperature Controlled Heater System with Runaway Protection CircuitThe standard GPR-2600 Series analyzer is not equipped with the heater system. However, in anticipation of very low ppm (highppb) oxygen analysis, the user may elect to add the heater system. If the analyzer is equipped with an optional temperaturecontrolled heater system, open the front door of the analyzer to access it. This unit is a PID controller which operates between0-99°F. The controller is programmed to maintain the temperature at 85°F.Caution: Do not change this setting. A higher temperaturesetting may drastically reduce sensor life and possibly causedamage to the electronic circuitry of both the controller and theanalyzer.Warning: Keep the front door securely fastened and closed whenthe temperature controller is ON.When power is applied to the temperature controller, the controllertunes itself to eliminate and/or minimize the over/under shoot oftemperature from the set point. It is recommended that at initialstart-up, when replacing the oxygen sensor or when troubleshooting, turn off the power to the heater or set the temperatureset point at 60°F (to turn the heater off) to prevent overheatingthe analyzer. When operating the analyzer under normalconditions, set the temperature controller at 85⁰F.Pictured with optional stainless steel sensor housingChanging the display value from °F to °C:1. Push the UP ARROW and ENTER buttons down for 5 seconds to access the SECURE MENU2. Press INDEX to advance to the F-C MENU3. Select °C or °F by pressing the UP ARROW key4. Press the ENTER key when F-C starts flashing on the display5. Press INDEX to exit the SECURE MENUHeater Runaway ProtectionPart of the optional temperature controlled heater system is a heater runaway protection circuit that protects the electronics inthe event the temperature controller should fail and thereby allowing the heater to runaway damaging the components insidethe analyzer.The runaway protection is provided by a J2 type device positioned between the temperature controller and the heater. Thisdevice cuts-off power to the heater if the temperature inside the analyzer exceeds 70°C. Should the J2 device cut power to theheater, correct the problem and reset the runaway protector device by exposing it to 0°C for a few minutes (a refrigeratorfreezer will do).20