Rosemount Analytical 6888 Xi Electronics
Starting at $1,212.00

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Features

  • Large backlit display and keypad
  • NEMA 4X enclosure
  • HART communications standard
  • Calibration recommended diagnostic
  • Automatic calibration capability
  • Extended process temperature ranges
  • Simplified installation
  • Surface mount technology improves reliability/vibration resistance
  • Local Operator Interface (LOI)
    • Single or dual channel when used with transmitter probes
    • Single channel, only with traditional architecture
  • Flame safety relay
  • Plugged diffuser alarm

The Rosemount Analytical 6888 Xi Electronics is for zirconium oxide oxygen probes. The zirconium oxide sensing technology for measuring the excess oxygen in combustion flue gases has gained prominence over the past several decades. This versatile electronics is specifically designed to run most O2 probes manufactured. The large backlit LCD display makes it easy to set up and operate. Fully automatic calibrations may be executed from this electronics with the addition of a small solenoid box for switching calibration gases. The 6888 Xi advanced electronics are designed to communicate with oxygen transmitters via either HART or a 7-wire cable with a 120V heater.

Plant personnel often ask how frequently an oxygen analyzer requires calibration. The answer is very application-dependent based upon the fuels being burned, normal levels of oxygen and the sulfur content in the flue gases. The Xi addresses this concern by providing an on-line diagnostic that determines when a calibration should be conducted, eliminating many unneeded calibrations and the technician and gas resources they consume. The Xi electronics has an on-line impedance measurement for the sensing cell.

This feature can trigger a fully automatic calibration by sequencing solenoids to introduce calibration gases to the sensing cell. The Single Probe Sequencer (SPS) switches CAL gases to a single probe, while a Multi-Probe Sequencer (IMPS) can handle 1 to 4 probes. Many needless calibrations based on "time in service" are eliminated. A contact closure notifies the control room when a calibration is taking place. The oxygen output signal can be held at its last value, or released during calibration. The Xi can also initiate calibrations by traditional methods:

  • Contact closure from the user's control room
  • Time since last calibration feature; established by the autocalibration system
  • Xi enhanced interface
  • HART/AMS

Traditional O2 electronics will go into alarm if the process temperature exceeds the controlled heater temperature. This feature enables the Xi to turn off the internal heater in this event, use the process temperature to heat the cell, and calculate O2 on the fly from the changing process temperatures. Note that accelerated probe and cell damage may occur as a result of extended operation above 800°C (1462°F), but at least the measurement will not go off-line during this event.

Process upsets can sometimes cause a combustion process to go into substoichiometric or reducing conditions. The oxygen readings from one or more probes may decline all the way to zero. The stoichiometer cell will measure the amount of oxygen deficiency during these reducing conditions. The trends in your DCS can be set up for a lower range limit of -1 or -2% oxygen to depict the level of oxygen deficiency. The operator can see if his control actions to recover are having the desired effect. These types of events do not occur frequently, but knowing the parameters of the situation prevents overcorrecting while coming out of the reducing condition.

Cables

Rosemount Analytical Hazardous Area Oxymitter Cable
Hazardous area oxymitter cable, 20' up to 200' options
$885.00
Rosemount Analytical Ribbon Cable
Xi ribbon cable, 14 conductor, CPU to PS board
$106.00
Rosemount Analytical O2 Ribbon Cable
O2 Xi ribbon cable, 10 conductor, CPU to probe I/O board
$86.00

Power Supplies

Rosemount Analytical Switching Power Supply Kit
Kit, switching power supply board for Xi
$988.00

Accessories

Please consider these optional accessories.

Rosemount Analytical Integral XPS Transmitter
Includes Xi and XPS mounted to a common plate with IFT footprint. general purpose, only
$4,336.00
Rosemount Analytical Remote Mounted Electronics
ATEX hazardous are, FM/CSA hazardous area approval options
$3,390.00
Rosemount Analytical Bulkhead Hole Plug and Gasket
Xi bulkhead hole plug and gasket
$24.00
Rosemount Analytical Pipe and Wall Mount Kit
$169.00
Rosemount Analytical Loss of Flame Relay Board
Xi Loss of Flame AC Relay Board
$467.00
Rosemount Analytical I/O Board Kit
Kit, I/O board for 6888 Xi
$751.00
Rosemount Analytical DR Board Kit
DR board kit for 6888 traditional architecture Xi electronics
$1,130.00
Rosemount Analytical Front Panel
6888 Xi front panel, optional CPU board
$467.00
Rosemount Analytical Panel Gasket
X-STREAM O2 Xi panel gasket
$24.00
Rosemount Analytical Cover Gasket
X-STREAM O2 Xi cover gasket
$24.00
Rosemount Analytical Insulator Piece
X-STREAM O2 Xi insulator piece
$35.00
Rosemount 1410 Wireless Gateway
Connects WirelessHART networks with host systems & data applications, offers network flexibility for remote indoor operations
$1,797.57
Rosemount 1420 Wireless Gateway
NEMA 4X gateway connects WirelessHART networks with host systems with the capacity for up to 100 devices
$4,574.15
Rosemount 775 Wireless THUM Adapter
Enables wireless capabilities for 2, 3, or 4-wire HART devices to remotely manage, monitor & gather data
$867.31

Spare Parts

Rosemount Analytical Stoichiometer Upgrade
Xi Stoichiometer Upgrade (single channel)
$1,238.00
Rosemount Analytical Programmable Reference Upgrade
Xi programmable reference upgrade
$1,204.00
Rosemount Analytical Extended Process Temperature Range Upgrade
Xi extended process temperature range upgrade
$995.00
Rosemount Analytical Enhanced Software
Enhanced software option upgrade diffuser plugged diagnostic
$920.00

Applications

This product can be used in the following applications: