Emerson Process Management OXYMITTER 4000 - Manual (Page 71)

Instruction Manual
IB-106-340C Rev. 4.1
July 2004
Rosemount Analytical Inc. A Division of Emerson Process Management Configuration with LOI 4-3
Hazardous Area Oxymitter 4000
f. Once the cell is up to operating tempera-
ture, the O
2
percentage can be read:
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-
ess gases can now be monitored.
When a calibration has been initiated,
the value at TP5 and TP6 is the % O
2
seen by the cell. Oxygen levels, as
seen on the multimeter, are:
8.0% O
2
= 8.0 VDC
0.4% O
2
= 0.4 VDC
2. HART/AMS.
3. Model 751. The loop-driven LCD
display.
SW2
SW1
1
2
3
4
TP1
J1
TP2
TP3
RED YEL GRN ORG
TP4
TP5
TP6
4-20 mA
IS INTERNALLY
POWERED
(DEFAULT)
4-20 mA REQUIRES
EXTERNAL POWER
HART
0 TO 10% O
2
3.5 mA
220 V 115 V
0 TO 25% O
2
LOCAL
21.6 mA
DEFAULT
POSITION
(EX-FACTORY)
3.5 mA/21.6 mA:
0 TO 25% O :
2
0 TO 10% O /
2
LOCAL:
HART: O RANGE SET BY HART/AMS
(FROM 0 TO 40% O )
O RANGE SET BY POS 2
O RANGE
WHEN ALARM EXISTS, OR
ON POWER UP, CURRENT
OUTPUT GOES TO THIS VALUE
2
2
2
2
37270011
ON
OFF
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.
Figure 4-2. Defaults – Hazardous Area Oxymitter 4000 with LOI
4