Emerson Rosemount Oxymitter 4000, Reference Manual, Page: 83 / 198

reading is always accurate and eliminates many unnecessary calibrations based on
calendar days or weeks since previous calibration. When using the Rosemount
™
SPS 4001B
or IMPS 4000, consider wiring some or all associated alarm contacts.
1. CALIBRATION INITIATE: Contact from the control room to a Rosemount SPS4001B
or IMPS 4000 (one per probe) provides the ability to manually initiate a calibration
at any time from the control room. Note that calibrations can also be initiated from
a HART
®
handheld communicator, from Asset Management Solutions software, or
from the keypad on the Rosemount Oxymitter 4000.
2. IN CALIBRATION: One contact per probe provides notification to the control room
that the
Calibration recommended
diagnostic has initiated an automatic
calibration through the Rosemount SPS 4001B or IMPS 4000. If the O
2
signal is
being used in an automatic control loop, use this contact to place the control loop
into Manual during calibration.
3. CALIBRATION FAILED: One contact per probe from a Rosemount SPS 4001B or IMPS
4000 to the control room for notification that the calibration procedure has failed. A
pressure switch, which indicates when the calibration gas bottles are empty, is
grouped with this alarm.
4. 4-20 mA SIGNAL DURING CALIBRATION: You can configure the 4-20 mA signal to
respond normally during any calibration or to hold the last O
2
value upon the
initiation of calibration. The factory default is for the 4-20 mA signal to track
(operate normally) throughout calibration. Holding the last O
2
value may be useful
if several probes are being averaged for the purpose of automatic control. Unless
you are averaging several probes, always place control loops that are using the O
2
signal into the Manual mode prior to starting the calibration.
Reference Manual Configure transmitter with LOI
00809-0100-4340 October 2019
Rosemount Oxymitter 4000 83