PN: 2975 Rev F, 3/2004
Page 17 of 24
C R Y S T A L
engineering corporation
XP2 Model & Serial Numbers
The model number and serial number of your XP2 are located behind the battery cover
under a battery.
Serial Numbering System
Serial Numbers consist of 6 numbers, with the left most digit representing the year of
manufacture. For example: 430117 was manufactured during 2004.
Model Numbering System
(prefix)XP2(options)
Prefix: Pressure range and units - see table on next page
Options: (None), standard
-RP, Rear Pressure Connection
-F4, Panel Mount Flange for 4½″ gauge cutout
-O, Cleaned for Oxygen Service
All Panel mounted gauges (-F4) include the rear port pressure connection. Any version may
be ordered with the (-O) option (Cleaned for Oxygen Service). Shown below are the -RP and
-F4 options.
Rear Pressure Fitting Panel Mount Flange
-RP -F4