Emerson Process Management IM-106-340 instruction manual SYSTEM/Input/Output Analog, Digital

Instruction Manual

IM-106-340, Rev. 4.0 May 2006

Oxymitter 4000

NOTE

Rosemount Analytical recommends 0.4% O2 and 8% O2 for calibration gases.

O2 Reset Values - Resets factory default values.

O2 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.

O2 Cal Interval - If automatic calibration is selected, this selects the interval between calibrations.

O2 Next Cal - If automatic calibration is selected, this selects the time until the first initial calibration takes place.

Gas Time - How long should each cal gas flow. Factory default is 300 seconds, but the user may want to vary this depending upon the length of calibration gas tubing runs.

Purge Time - Used if the O2 output is selected to hold the last value during calibration. After the 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.

Auto Calib? - Select "Yes" if an SPS or IMPS autocalibration system is part of the system.

SYSTEM/Input/Output

Analog

Pertaining to the analog 4-20 mA signal representing O2.

O2 Type - 4-20 mA signal may be configured to increase with increasing O2 or the reverse.

O2 Range - Upper O2 range is user selectable.

O2 Alarm Level - User can configure the digital output to alarm at a given O2 level.

Do O2 Trim - Procedure for calibrating the 4-20 mA signal to a precision mA source. Procedure is intuitive.

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 O2 Alarm - If any of the conditions noted above include a low O2 process alarm, set 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.

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