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Instruction Manual
IB-106-340 Rev. 2.4
April, 2001
Rosemount Analytical Inc. A Division of Emerson Process Management Startup 3-5
Oxymitter 4000
DIAGNOSTIC
ALARMS
TEST
POINTS
HEATERT/C
HEATER
O2 CELL
CALIBRATION
CALIBRATION RECOMMENDED
O2 CELL mV +
O2 CELL mv -
HEATERT/C +
HEATERT/C -
INC INC
DEC DEC
HIGH
GAS
LOW
GAS
CAL
TEST GAS +
PROCESS -
% O2
SW2
TP1
J1
TP2
TP3
RED
YEL
GRN
ORG
TP4
TP5
TP6
ON
HEATER T/C
HEATER
O CELL
2
CALIBRATION
LIGHTING SEQUENCE DURING NORMAL OPERATION
1
2 3 4 1 2 3 4
HEATER T/C
HEATER
O CELL
2
CALIBRATION
LIGHTING SEQUENCE DURING WARM-UP
1
2 3 4 1 2 3 4
22220056
Figure 3-3. Startup and Normal Operation
3-3 RECOMMENDED CONFIGURATION
a. 4-20 mA Signal Upon Critical Alarm
Rosemount recommends that the factory
default be utilized. The 4-20 mA signal will
go to the 3.8 mA level upon any critical
alarm which will cause the O
2
reading to be
unusable. Customer can also select 22 mA
as the failure setting if normal operations
cause O
2
readings to go below the zero %
O
2
(4 mA) level.
If the O
2
measurement is being utilized as
part of an automatic control loop, the loop
should be placed into manual upon this fail-
ure event or other appropriate action should
be taken.
b. Calibration
Rosemount recommends utilizing an auto-
calibration system, actuated by the “calibra-
tion recommended” diagnostic. New O
2
cells may operate for more than a year, but
older cells may require recalibration every
few weeks as they near the end of their life.
This strategy ensures that the O
2
reading is
always accurate, and eliminates many un-
necessary calibrations based on calendar
days or weeks since previous calibration.
When utilizing the SPS 4000 or the IMPS
4000, consider wiring some or all associ-
ated alarm contacts.
1. CALIBRATION INITIATE. Contact
from the control room to an SPS 4000
or IMPS 4000 (one per probe) provides
the ability to manually initiate a calibra-
tion at any time from the control room.
Note that calibrations can also be initi-
ated from a HART handheld communi-
cator, from Asset Management
Solutions software, or from the keypad
on the Oxymitter 4000.
2. IN CALIBRATION. One contact per
probe provides notification to the con-
trol room that the “calibration recom-
mended” diagnostic has initiated an
automatic calibration through the SPS
4000 or IMPS 4000. If the O
2
signal is
being utilized in an automatic control
loop, this contact should be utilized to
place the control loop into manual dur-
ing calibration.
3