Emerson Process Management IM-106-340 instruction manual Oxymitter

Instruction Manual

IM-106-340, Rev. 4.0 May 2006

Oxymitter 4000

Semi-Automatic

Calibration

Manual Calibration with Membrane Keypad

3.If using an IMPS 4000, enter a time interval via the IMPS 4000 keypad that will initiate an automatic calibration at a scheduled time interval (in hours). To set the CalIntvX parameter of the CHANGE PRESETS display mode, refer to the IMPS 4000 Intelligent Multiprobe Test Gas Sequencer Instruction Manual for more information.

Once an automatic calibration is initiated, by any of the methods previously described, the Oxymitter 4000's CALIBRATION RECOMMENDED alarm signals an IMPS 4000 or SPS 4001B to initiate a calibration. The sequencer sends an "in cal" signal to the control room so that any automatic control loops can be placed in manual. Then, the sequencer begins to sequence the calibration gases.

Semi-automatic calibrations only require operator initiation. However, the calibration gases must be permanently piped to the Oxymitter 4000, an SPS 4001B or IMPS 4000 must be installed to sequence the gases, and the logic I/O must be set to mode 8 or 9 via HART/AMS to allow the sequencer and the Oxymitter 4000 to communicate.

Depending on your system setup, a semi-automatic calibration can be initiated by the following methods:

1.Oxymitter 4000 with membrane keypad. Press the CAL key on the Oxymitter 4000 keypad.

2.Oxymitter 4000 with LOI. Select "Start Calib" from the CALIBRATION menu.

3.IMPS 4000. Use the IMPS 4000 keypad to change the InitCalX parameter of the CHANGE PRESETS display mode from 0000 to 0001. Refer to the IMPS 4000 Intelligent Multiprobe Test Gas Sequencer Instruction Manual for more information.

4.HART. Use the HART Communicator to access the O2 CALIBRATE menu and perform the O2 CAL method. Refer to "HART Communicator O2 Cal Method" in Section 7: HART/AMS for the complete calibration procedure.

5.AMS. Refer to AMS documentation for more information.

6.Remote Contact. Initiate a calibration from a remote location via the remote contact input connection provided by an IMPS 4000 or SPS 4001B. Refer to the documentation available for the control system in use for more information.

Once a semi-automatic calibration is initiated by any of the methods previously described, the Oxymitter 4000's CALIBRATION RECOMMENDED alarm signals an IMPS 4000 or SPS 4001B to initiate a calibration. The sequencer sends an "in cal" signal to the control room so that any automatic control loops can be placed in manual. Then, the sequencer begins to sequence the calibration gases.

Manual calibrations must be performed at the Oxymitter 4000 site and will require operator intervention throughout the process. Manual calibration instructions, in condensed form, can also be found on the inside of the right electronics housing cover. See Figure 9-2.

Use the following procedure to perform a manual calibration: 1. Place control loop in manual.

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