Analytical Industries GPR-3100 Series Oxygen Purity Analyzer - Manual (Page 25)

Advanced Instruments Inc.
5 Operation
GPR-3100 Rev 2/05 18
4. Press the ENTER key when F-C starts flashing on the display
5. Press INDEX to exit the SECURE MENU
Part of the optional temperature controlled heater system is a heater runaway protection circuit that
protects the electronics in the event the temperature controller should fail and thereby allowing the
heater to runaway damaging the interior of the analysis unit.
The runaway protection is provided by a J2 type device positioned between the temperature controller
and the heater.
This device cuts of power to the heater if the temperature inside the analysis unit exceeds 70
°C.
Should the J2 device cut power to the heater, correct the problem and reset the runaway protector
device by exposing it to 0
°C for a few minutes (a refrigerator freezer will do).
Installation is complete . . . proceed to Calibration