Owner`s manual

2
O ptima FX Owner’s Manual
Ch. 3 Pg. 11
Copyright, Dive Rite All Rights Reserved January 2009
independent! The calibrate option is disabled while in dive mode to prevent a possible accident
by the wet switches sensing water or depth sensor detecting a depth.
The HammerHead holds a very stable calibration; it is not necessary to constantly recalibrate the
handsets. The sensors should be verified to be within a few percent of expected values by
performing a quick loop flush with oxygen and/or exposing the sensors to AIR prior to each dive.
Although not endorsed by the manufacturer, alternate procedures for calibration can be found in
an article published on WWW.REBREATHERWORLD.COM entitled “Accurate PO2
Calibration”. This article discusses hardware, procedures and warnings necessary to calibrate
various types of RB electronics using alternate oxygen concentrations and at altitude when not
specifically supported by the electronics.