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Hazardous Area Oxymitter 4000
f.
Once the cell is up to operating tempera-
ture, the O
percentage can be read:
2
1. To access TP5 and TP6 under the LOI
module (Figure 4-2), power down the
Oxymitter 4000 and remove the LOI
module. Attach alligator leads from a
multimeter across TP5 and TP6
(Figure 3-2). Install the LOI module and
power up the Oxymitter 4000. Allow
time for the cell to reach operating
temperature. The calibration and proc-
4-20 mA
IS INTERNALLY
POWERED
(DEFAULT)
4-20 mA REQUIRES
EXTERNAL POWER
Figure 4-2. Defaults – Hazardous Area Oxymitter 4000 with LOI
Rosemount Analytical Inc. A Division of Emerson Process Management
HART: O RANGE SET BY HART/AMS
2
(FROM 0 TO 40% O )
LOCAL:
O RANGE SET BY POS 2
2
0 TO 10% O /
2
0 TO 25% O :
O RANGE
2
2
3.5 mA/21.6 mA:
WHEN ALARM EXISTS, OR
ON POWER UP, CURRENT
OUTPUT GOES TO THIS VALUE
ess gases can now be monitored.
When a calibration has been initiated,
the value at TP5 and TP6 is the % O
seen by the cell. Oxygen levels, as
seen on the multimeter, are:
8.0% O
= 8.0 VDC
2
0.4% O
= 0.4 VDC
2
2. HART/AMS.
3. Model 751. The loop-driven LCD
display.
HART
2
0 TO 10% O
2
3.5 mA
220 V
DEFAULT
POSITION
(EX-FACTORY)
SW2
1
2
3
4
J1
TP1
TP2
TP3
TP4
TP5
TP6
Instruction Manual
IB-106-340C Rev. 4.1
July 2004
2
LOCAL
0 TO 25% O
2
21.6 mA
115 V
NOTE:
THE 115 V OPTION
AT SWITCH SW2
POSITION 4 IS ACTIVE
ONLY WHEN THE
HEATER VOLTAGE
OPTION IS SET TO
MANUAL IN THE
SOFTWARE.
37270011
Configuration with LOI
4-3
4
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