Ao Calibration - Honeywell 900 User Manual

I/O Calibration

AO Calibration

AO Calibration
ATTENTION
You should not access the Process Control Utilities Calibrate Controller Analog I/O display
while the IO calibration display is being displayed, or vice versa. Calibration can't be done as
long as both displays are shown; user must exit either display to do a calibration.
Analog outputs are factory calibrated to +/- 0.1% of span. A field calibration may be performed on any
analog output on a point-by-point basis to optimize accuracy. The factory calibration parameters are
retained in non-volatile memory and may be re-installed to undo a field calibration using selections from
the calibration procedure.
Both Factory and field calibration information is stored on the Analog Output module itself. Therefore,
once a module has been calibrated it can be moved to any slot position or any rack without being
recalibrated.
Item
Instrument Status And
Instructions
Reference
Rack Number
Module Number
Channel Number
Select Output
Measured Values (mA)
Calibrate 0% Output
Calibrate 100% Output
Save
After calibration, return the Controller to Run mode. Use IO Calibration display (page 159) or Controller
Mode button (page 10)
164
This shows the status of the calibration. In order of appearance statuses are:
Ready
Measure AO 0% Output & Enter
0% AO Output
Measure AO 100% Output & Enter
100% AO Output
AO Cal Failed (red) or Done (green)
Save AO Calibration
Indicates output reference value and engineering units. Also indicates an invalid
module or channel.
Enter the rack, module, and channel of the AO channel to be calibrated.
Select this to verify that the selected module is installed in the controller.
Measure the actual output (as mA, mV or Volt) and then enter the measured value in
mA here.
Select this to calibrate. Status will indicate when calibration is complete.
Select this to calibrate. Status will indicate when calibration is complete.
Select this to save the channel calibration.
900 Control Station User Guide
Description
Revision 9
May 2014