User manual

Poseidon MKVI User Manual Appendix 1
Page 71
The reason for this alert is, that when the unit is turned on, and the mouthpiece is in CC mode,
it will perform sensor validations, checking the PO
2
value, even when it is on land. If the differ-
ence in PO
2
value is too small, when the unit compares the PO
2
value from the last validation
with the PO
2
reading from the most recent validation, the unit assumes that the primary oxygen
sensor is ”frozen” and giving a false reading.
If you get a C1 alert, when your unit is on land, do the following to turn the alert of:
1. Set the DV switch to CC mode.
2. Breath on the loop, to change the PO
2
value.
3. Continue breathing on the loop until the next successfull sensor validation is performed.
(about 2 min. maximum)
4. When the C1 alert goes away, set the DV switch in OC mode.
If the C1 alert persists, after you’ve done the 4 steps above, then there’s something else
causing the C1 alert.
Note.
The C1 alert will NOT go away by switching the mouthpiece DV switch to OC mode only.
Hyperoxic linearity test
When you descend and reach 6 m (20 swf) depth, the Discovey will do a Hyperoxic Linearity
test. The reason for the test is to make sure that the oxygen sensors can read PO2 values
above 1.0.
If the unit, for any reason, fails the hyperoxic Linearity test, the maximum setpoint used during
the dive is 1.0.
There are a few things you can do, to increase the chance of a successful Hyperoxic Linearity test.
When descending, give the unit time to perform the test, i.e. don’t descend too fast between
6 m (20 swf) to 10 m (33 swf).
Avoid repeated ascend/descend depth changes between 6 m (20 swf) to 10 m (33 swf) until
the Hyperoxic Linearity test is completed.
How the PO
2
alarm works
The PO
2
status is processed in the following order:
If the PO
2
is < 0,25 then a hypoxic alarm will occur immediately.
If the PO
2
is > 1.8 then a hyperoxic alarm will occur immediately.
If the PO
2
is > 1.6 and has been so for more then 1 minute, a hyperoxic alarm will occur.
If abs(PO
2
- SP) > SP/4 and has been so for more then 2 minutes, a deviation alarm will occur.
(Note. SP = setpoint)
In all other cases, no alarms will occur.
What to do if I can’t resolve the problem
If you can’t resolve the problem you are experiencing, do the following:
• Connect your Poseidon MKVI to a computer/laptop using the PC Conguration program
(available as a download from www.poseidon.com)
• Download the Red Box Log le from the two last failed pre-dice checks or from the last dive
where you experienced the problem.
• If you experienced problems during a dive, also download the Dive log from the dive in question.
• Contact the dive center / dealer where you purchased your Poseidon MKVI and e-mail
them the Red Box Log le(s) and dive log(s) you have downloaded from your MKVI.
If you are asked to send in your e-module for repair / analysis, please send the following parts:
• Electronics module with primary display, HUD and HP sensors
• Battery
• Oxygen sensors