Emerson OCX 8800 instruction manual Operator Initiated Autocalibration Manual Calibration

OCX 8800

Instruction Manual

IM-106-880, Rev 1.0 January 2007

OPERATOR - INITIATED AUTOCALIBRATION

MANUAL CALIBRATION

An operator can initiate an automatic calibration at any time provided that the unit is equipped with calibration solenoids.

Autocalibration using the LOI

To initiate a calibration using the LOI, perform the following steps on the LOI menu tree. Refer to Section 4, Using the LOI, for the LOI menu tree.

1.From the CALIBRATION menu, use the right-pointing arrow to select the Cal Control menu.

2.Select Start Cal-O2,Start Cal COe, or Start Cal Both to start the calibration. Select Cal Verify to access the calibration window.

3.At the prompt, use the right-pointing arrow to initiate automatic calibration.

Autocalibration using HART

To initiate an automatic calibration using HART/AMS, perform the following steps on the HART menu tree. Refer to Section 5, Using HART Communications, for the HART menu tree.

1.Select DIAG/SERVICE from DEVICE SETUP menu.

2.Select CALIBRATE from the DIAG/SERVICE menu.

3.Select PERFORM CAL from the CALIBRATE menu.

4.Select CAL METHODS from the PERFORM CAL menu.

5.From the CAL METHODS menu, select the type of calibration desired: O2 Calibration, COe Calibration, or O2 and COe Calibration.

If a unit is not equipped with calibration solenoids, a calibration must be performed by an operator following prompts from the unit. Refer to the following paragraphs for manual calibration.

Manual Calibration using the LOI

Use the following procedure to perform a manual calibration with the LOI. If necessary, refer to the menu tree in Section 4, Using the LOI. Once the manual calibration procedure is initiated at the LOI, a series of prompts will appear giving instructions to the operator.

1.Use the right-pointing key to select the CALIBRATION first column submenu.

2.From the CALIBRATION submenu use the right-pointing key to select the Cal Control second column submenu.

3.From the Cal Control submenu use the right-pointing key to select the third column Start Cal O2 option.

4.Remain at the Start Cal O2 option or use the down-pointing key to select the Start Cal COe option or Start Cal Both option. (The following sequence applies when Start Cal Both is selected.)

5.Use the right-pointing key to start the calibration. Turn on the low O2 test gas, when prompted by the Flow Low Gas message.

6.Press the right-pointing key when the low O2 test gas is applied. The calibration data changes as the calibration proceeds.

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