Emerson Rosemount Oxymitter 4000, Reference Manual, Page: 99 / 198

O
2
Reset Values Resets factory default values.
O
2
Output
Tracks
4 to 20 mA signal can be held at the last value during calibration, or
the signal can be left to track the cal gases.
O
2
Cal Interval If you select automatic calibration, this selects the interval between
calibrations.
O
2
Next Cal If you select automatic calibration, this selects the time until the initial
calibration takes place.
Gas Time How long each cal gas should flow. The factory default is 300 seconds,
but the operator may want to vary this depending upon the length of
calibration gas tubing runs.
Purge Time Used if the O
2
output is selected to hold the last value during
calibration. Determines how long until the sensor comes back to the
normal process reading and when the 4-20 mA signal can be released
after the second cal gas is removed.
Auto Calib? Select
Yes
if a Rosemount SPS or IMPS autocalibration system is part
of the system.
SYSTEM/Input/
Output • Analog: Pertaining to the analog 4-20 mA signal representing O
2
.
— O
2
Type: 4-20 mA signal may be configured to increase with
increasing O
2
or the reverse.
— O
2
Range: Upper O
2
range is user-selectable.
— O
2
Alarm Level: Operator can configure the digital output to
alarm at a given O
2
level.
— Do O
2
Trim: Procedure for calibrating the 4-20 mA signal to a
precision mA source. Procedure is intuitive.
• Digital: The operator may configure a bi-directional logic signal as
an alarm or as a calibration handshake signal.
— Logic I/O Mode: One of nine different conditions can be set for
the digital signal. See
Table 8-2 .
— Low O
2
Alarm: If any of the conditions noted above include a
low O
2
process alarm, set the value here.
— Input State: Notes the current condition of the bi-directional
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.
6.6 SYSTEM/Parameters
O
2
Slope Data regarding the strength of the calibration output. The transmitter
automatically collects this information after a calibration, and the
operator does not normally input this data.
Reference Manual Start up and operate transmitter with LOI
00809-0100-4340 October 2019
Rosemount Oxymitter 4000 99