Semi-Automatic Calibration - Emerson Oxymitter 5000 Instruction Manual

Instruction Manual
IM-106-350, Rev 2.2
July 2008
Semi-Automatic
Calibration
Manual Calibration with
Membrane Keypad
3. Enter a time to next calibration using the TIME_TO _NEXT_CAL
parameter via fieldbus. Calibrations will then occur regularly at this
interval.
4. 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 5000'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 5000, 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 the FOUNDATION fieldbus computer
terminal to allow the sequencer and the Oxymitter 5000 to communicate.
Depending on your system setup, a semi-automatic calibration can be
initiated by the following methods:
1. Oxymitter 5000 with membrane keypad. Press the CAL key on the
Oxymitter 5000 keypad.
2. Oxymitter 5000 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. FOUNDATION fieldbus. Use fieldbus to perform the O
5. 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 5000'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 5000 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.
Oxymitter 5000
CAL method.
2
9-3