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4 Description and Specifications
S
ection 1: Description and Specifications 6888Xi Advanced Electronics Instruction Manual
December 2012 PN 51-6888Xi
1.2.2 System Configurations
Integral Transmitter Electronics,
HART and 6888Xi Communications
The 6888Xi Advanced Electronics, Figure 1-2, provide a local display/keypad for setting up,
calibrating, and displaying O
2
, and for diagnosing probe problems. The 6888Xi also offers
additional features including a "Calibration Recommended" diagnostic, fully automatic
calibration, optional flame safety interface (single probe version only), extended process
temperature capability, stoichiometer, programmable reference, and plugged diffusor. These
additional features will be discussed in other sections of this manual. The 6888Xi can be
purchased to operate a single probe, or as a dual channel unit to run two probes.
Traditional Architecture, HART and 6888Xi Communications
Some customers prefer not to mount electronics onto the probe, so a "traditional architecture"
version is offered. This probe sends raw millivolt signals via a 7-conductor cable to the 6888Xi
electronics, Figure 1-3, which does all heater control and signal conditioning in addition to its
display/keypad functions. The 6888Xi Advanced Electronics is offered to support direct replace-
ment probes with 120 volt heaters.
6888A
6888Xi
Advanced
Electronics
4
/
/
Figure 1-2. 6888A with Integral Transmitter Electronics and
Optional 6888Xi Advanced Electronics