800 series Analyzer Primary Calibration - AREVA NP Inc.

F. Alternately inject the two mVDC values into the conditioner sensor terminals andadjust the front panel Span potentiometer until the ideal difference inconcentration is obtained. For example, if the calibration gas concentrationswere 1% and 4%, the ideal difference will be 3%.G. While applying the mVDC signal obtained in step B, adjust the conditioner frontpanel Zero potentiometer to obtain the correct displayed absolute value In theexample used above the ideal displayed value will be 1%.H. Increase the applied signal to the value obtained in step D and observe thecorrect conditioner displayed value (4% for the example used above).Note: The last adjustment should always be the Zero potentiometer. Zero will not affectthe Span adjustment. Span will affect the Zero adjustment.I. Disconnect the simulator and re-connect the sensor leads to the conditioner tocomplete the analyzer calibration.Adjustment Example:Assume the following results were obtained during steps B and D and that the selectedcalibration gases were 1% and 4%.Step Sensor Signal Displayed ValueB 0.9mVDC .9%D 3.30mVDC 3.3%Alternate between 0.90 and 3.30 mVDC while adjusting the span pot to achieve a deltaof 3.0%. The initial delta is 2.4% so the span pot will need to be adjusted to providemore gain. Assume the final Span adjustment to be;Step Sensor Signal Displayed ValueB 0.9mVDC 1.1%D 3.30mVDC 4.1%All that will be required is a slight decrease in the zero setting. With 0.90 mVDC applied,decrease the Zero pot to provide a displayed value of 1.0%. Increasing the signal to3.3mVDC should provide the ideal displayed value of 4.0% or;Step Sensor Signal Displayed ValueB 0.9mVDC 1.0%D 3.30mVDC 4.0%