It is recommended that your analyzer be checked for accuracy on an annual basis.  If your calibration is off or is reading incorrectly, then follow the steps below for recalibration.  To verify the accuracy of your analyzer, simply connect the sample line to a cannister of known test gas and ensure that the reading on your controller screen matches the test gas.  Quotes for test gas can be requested via support@southteksystems911.zendesk.com or (910) 415-1880.Turn generator off.Close the ball valve connected to sample line at N2 storage tank.Disconnect sample line from outside of electrical cabinet.From the PLC (display) on the generator:1.Press “Menu”2.Enter Password (6557) and press the bottom right button (return key).3.Select “sensor setup/calibration.”4.Select “O2 PPM/% calibration”For % Units:1.Enter the contents of your known gas source in the field labeled “0-2% O2 Calibration Gas.”  This will be listed on the Test Gas cannister and is typically 1%.2.Enter 20.9% in the field labeled “20-22% O2 Calibration Gas.”For PPM units:1.Enter the contents of your highest purity (lower PPM) known gas source in the field labeled “O2 PPM Low Calibration.”  This will be listed on the Test Gas cannister and is typically 10 PPM.2.Enter the contents of your lowest purity (higher PPM) known gas source in the field labeled “800-1000 PPM Cal Gas.”  This will be listed on the Test Gas cannister and is typically 700 PPM.3.Connect the provided regulator onto your higher purity (10 PPM) known gas source.4.Connect the provided tubing over the sample line connector on the electrical cabinet.5.Open the valve on the regulator and allow gas to flow to the analyzer for minimum of 5 minutes.6.On the PLC there is a value displayed at the bottom of the calibration screen labeled “Current Raw”.7.Take the “current raw” value and enter it in the top field (low side calibration)8.Close the valve on the regulator.9.Switch the regulator to your high side calibration gas.10.Open the valve and allow gas to flow for 5 minutes.11.On the PLC there is a value displayed at the bottom of the calibration screen labeled “Current Raw”.12.Take the “current raw” value and plug in the 2nd field (high side calibration)13.Close the valve on the regulator.14.Disconnect the tubing from the sample port.15.Reconnect your sample line to the sample port.16.Open the valve on the storage tank feeding the sample line.This should complete calibration on your analyzer.  If you have trouble or require assistance, please give us a call at 910-415-1880.