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Hazardous Area Oxymitter 4000
1. Access TP5 and TP6 next to the mem-
brane keypad. Attach a multimeter
across TP5 and TP6. The calibration
and process gases can now be moni-
tored. Pressing the INC or DEC once
will cause the output to switch from the
process gas to the calibration gas.
Pressing INC or DEC a second time
will increase or decrease the calibra-
tion gas parameter. If the keys have
been inactive for one minute, the
4-20 mA IS
INTERNALLY
POWERED (DEFAULT)
4-20 mA REQUIRES
EXTERNAL POWER
Figure 3-2. Defaults – Hazardous Area Oxymitter 4000 with Membrane Keypad
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, OUTPUT CURRENT
GOES TO THIS VALUE
HEATER T/C
DIAGNOSTIC
O2 CELL
ALARMS
CALIBRATION
CALIBRATION RECOMMENDED
O2 CELL mV +
O2 CELL mV -
TEST
HEATER T/C +
POINTS
HEATER T/C -
INC
INC
HIGH
LOW
GAS
GAS
TEST GAS +
DEC
DEC
PROCESS -
output reverts to the process gas.
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
0.4% O
2. HART/AMS.
3. Model 751. The loop-driven LCD
display.
2
HART
0 TO 10% O
3.5 mA
220 V
HEATER
SW2
1
2
3
4
J1
TP1
TP2
TP3
TP4
CAL
TP5
TP6
% O2
Instruction Manual
IB-106-340C Rev. 4.1
July 2004
= 8.0 VDC
2
= 0.4 VDC
2
LOCAL
0 TO 25% O
2
2
21.6 mA
115 V
DEFAULT
POSITION
(EX-FACTORY)
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
(AUTO TUNE = NO).
37270001
Configuration with Keypad
2
3
3-3
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