Emerson OXYMITTER 4000 - Manual (Page 132)

Instruction Manual
IB-106-340 Rev. 3.0
December 2003
9-4 Maintenance and Service Rosemount Analytical Inc. A Division of Emerson Process Management
Oxymitter 4000
4-20 mA signal will hold the
last value. The default condi-
tion is for the output to track.
the flashing LED indicates
that the Oxymitter 4000 is
ready to accept the first cali-
bration gas.
3 Apply the first calibration gas.
(Electronics will abort the cali-
bration if step 4 is not done
within 30 minutes).
4 Push the CAL key; the CAL
LED will be on solid. A timer is
activated to allow the calibra-
tion gas adequate time to flow
(default time of five minutes).
When the timer times out, the
Oxymitter 4000 has taken the
readings using the first cali-
bration gas and the CAL LED
will flash continuously. The
flashing indicates the Oxy-
mitter 4000 is ready to take
readings using the second
calibration gas.
5 Remove the first calibration
gas and apply the second
calibration gas. (Electronics
will abort the calibration if step
6 is not done within 30
minutes).
6 Push the CAL key; the CAL
LED will be on solid. The
timer is activated for the sec-
ond calibration gas flow.
When the timer times out, the
CAL LED will flash a 2 pattern
flash or a 3 pattern flash (2
pattern flash equals a valid
calibration, 3 pattern flash
equals an invalid calibration).
If the slope or the constant is
out of specification, a diag-
nostic alarm LED will be
flashing. The diagnostic alarm
will remain active until the
purge cycle is over. If the
three pattern flash occurs
without a diagnostic alarm,
the calibration gases could be
the same or the calibration
gas was not turned on.
The CAL LED flashing indi-
cates the calibration is done.
(See Section 8, TROUBLE-
SHOOTING, for an explana-
tion of the 2 pattern and 3
pattern flashes).
7 Remove the second calibra-
tion gas and cap off the cali-
bration gas port.
8 Push the CAL key; the CAL
LED will be on solid as the
unit purges. (Default purge
time is three minutes). When
the purge is complete, the
CAL LED will turn off and the
Oxymitter 4000 output un-
locks 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 the
new calibration values, slope or
constant, is not within the pa-
rameters, the DIAGNOSTIC
ALARMS LED will indicate an
alarm. (See Section 8, TROUBLE-
SHOOTING, for alarm codes). If
the calibration was invalid, the
Oxymitter 4000 will return to nor-
mal operation, as it was before a
calibration was initiated, and the
parameters will not be
updated.
(e) Place control loop in automatic.