
6. Press the
CAL
key.
The
CAL
LED turns solid. A timer is activated to allow the calibration gas adequate
time to flow (default time of five minutes). When the timer times out, the
transmitter has finished taking the readings using the first calibration gas. The
CAL
LED starts to flash continuously. The flashing indicates that the transmitter is ready
to take readings using the second calibration gas.
7. Remove the first calibration gas and apply the second calibration gas.
Electronics will abort the calibration if you do not complete this step within 30
minutes.
8. Press the
CAL
key.
The
CAL
LED turns solid. The timer is activated for the second calibration gas flow.
When the timer times out, the
CAL
LED flashes a two pattern flash or a three pattern
flash. (A two pattern flash indicates a valid calibration, and a three pattern flash
indicates an invalid calibration). If the slope or the constant is out of specification, a
diagnostic alarm LED starts flashing. The diagnostic alarm remains active until the
purge cycle is over. If the three pattern flash occurs without the diagnostic alarm,
the calibration gases could be the same or the calibration gas could not be turned
on.
A flashing
CAL
LED indicates the calibration is done. See
for an
explanation of the two pattern and three pattern flashes.
9. Remove the second calibration gas and cap off the calibration gas port.
10. Press the
CAL
key.
The
CAL
LED turns solid as the unit purges. (The default purge time is three
minutes.) When the purge is complete, the
CAL
LED turns off, and the transmitter
unlocks from its held value and begins to read the process O
2
.
If the calibration was valid, the
DIAGNOSTIC ALARMS
LEDs will indicate normal
operation. If either new calibration value (slope or constant) is not within
parameters, the
DIAGNOSTIC ALARMS
LED indicates an alarm. See
for alarm codes. If the calibration was invalid, the transmitter will return to normal
operation, as it was before the caqlibration, and the parameters will not be
updated.
11. Place control loop in automatic.
9.2.3
Calibrate with LOI
Refer to
for a view of the LOI menu tree.
Procedure
1. Go to
CALIBRATION
→
Start Calibration
.
To abort the calibration at any time, select
Abort Calib
. This exits the calibration.
After you remove the calibration gases and the purge times out, the transmitter
goes back to normal operational mode.
The LOI instructs you through the entire procedure.
The LOI displays the following:
Reference Manual
Maintenance and service
00809-0100-4340
October 2019
Rosemount Oxymitter 4000
155
Summary of Contents for Rosemount Oxymitter 4000
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Page 184: ...Optional accessories Reference Manual October 2019 00809 0100 4340 184 Emerson com Rosemount ...