Logic I/O - Emerson Rosemount Oxymitter 4000 Reference Manual

Reference Manual
00809-0100-4340
3.4.3 Read O
Once the cell is up to operating temperature, you can read O
1. Access TP5 and TP6 next to the membrane keypad. Attach a multimeter across TP6
2. HART
3. Rosemount
3.5

Logic I/O

You can configure the two-terminal logic contact either as a solid-state relay-activated
alarm or as a bi-directional calibration handshake signal to a Rosemount
SPS 4001B.
The configuration of this signal depends on the setting of the Logic I/O PIN MODE via
HART
3.5.1 Alarm
When configured as an alarm, this signal alerts you to an out-of-spec condition. The
output is +5 Vdc in series with a 340 ohm resistor.
For optimum performance, Emerson recommends connecting the output to a Potter &
Brumfield 3.2 mA DC relay (PN R105-E1Y1-J1.OK).
Of the 10 modes in
is mode 5 for a Rosemount
4001B. In this mode, the output will signal when a unit alarm or a CALIBRATION
RECOMMENDED
Rosemount Oxymitter 4000
concentration
2
and TP6. You can now monitor the calibration and process gases. Press INC or DEC
once to switch the output from process gas to calibration gas. Press INC or DEC a
second time to increase or decrease the calibration gas parameter. If the keys have
been inactive for one minute, the output reverts to the process gas. When you have
initiated a calibration, the value at TP5 and TP6 is the %O
levels, as seen on the multimeter are:
• 8.0% O = 8.0 Vdc
2
• 0.4% O = 0.4 Vdc
2
®
/AMS
WARNING
The HART option is not protected by energy limiting barriers.
Do not interface with HART from within the hazardous area.
Route the 4-20 mA cables and make the connections outside the hazardous
area.
This is the case even when using the intrinsically safe version of the handheld
communicator.
™
751: the loop driven LCD display
®
/AMS or LOI. The ten different modes available are explained in
Table 2-9, modes 0 through 7 are the alarm modes. The factory default
™
Oxymitter 4000 without a Rosemount IMPS 4000 or SPS
indication occurs.
Configure transmitter with membrane keypad
percentage.
2
seen by the cell. Oxygen
2
October 2019
™
IMPS 4000 or
Table 2-9.
73