System/Parameters; Slope; O2 Constant; O2 T90 Time - Emerson Rosemount Oxymitter 4000 Reference Manual

Rosemount Oxymitter 4000

SYSTEM/Parameters

O

Slope

2

O2 Constant

O2 T90 Time

Auto Tune

Lockout Time

Revert Time

Luminance

80
Digital
A bi-directional logic signal may be configured as an alarm, or as a calibration handshake
signal.
Logic I/O Mode - One of 9 different sets of conditions can be set for the digital signal. See
Table 8-2.
Low O Alarm - If any of the conditions noted above include a low O
2
the value here.
Input State - Notes the current condition of the bi-directional digital signal.
Force Output - Forces the output state of the signal to either open or closed. This is used
primarily when diagnosing potential problems with this signal.
O slope is data regarding the strength of the sensing cell output. This information is
2
automatically calculated after a calibration, and the user does not normally input this
data.
O constant is the amount of voltage a cell generates with ambient air as the calibration
2
gas. Again, this is normally calculated as a result of calibration, and is not normally input
by the user.
Some users may feel that the O
permits the user to dampen the O
The electronics detects the line voltage powering the instrument automatically, and
picks proper algorithms for heater control. User can force a high voltage algorithm, or a
low, but Auto Tune is the default, and is recommended.
Once a user goes one level deep into the menu structure, an additional "revert time" is
provided to prevent nuisance lockouts. One hour is the default, and it is user
configurable.
Used if the O output is selected to hold the last value during calibration. After the
2
second cal gas is removed, how long until the sensor comes back to the normal process
reading, and the 4-20 mA signal can be released.
Gas fluorescence brightness is user adjustable.
reading is too active for certain processes. This feature
2
signal. The default value is zero seconds dampening.
2
process alarm, set
2
Startup and Operation with LOI
July 2018