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
HEATERT/C
HEATER
O CELL
2
CALIBRATION
LIGHTINGSEQUENCE DURING NORMAL OPERATION
12 3 4 1 2 3 4
HEATERT/C
HEATER
O CELL
2
CALIBRATION
LIGHTINGSEQUENCE DURING WARM-UP
12 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 O2 reading to be
unusable. Customer can also select 22 mA
as the failure setting if normal operations
cause O2 readings to go below the zero %
O2 (4 mA) level.
If the O2 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 O2
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 O2 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 O2 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