ANALOX Sub Mk III F, User Manual

Page: 53 / 79

Sub MkIIIF
User Manual
Int. Approved
Document ref: ASF3-800-08 November 2018 Page 53 of 79
Copyright © 2009 Analox Ltd. All Rights Reserved.
Commercial in Confidence
8.3 Alarm Set-point Menu
The exact structure of this menu depends upon the physical sensors which are installed in a
system. Note the labels REM1, REM2. in the following diagrams may be replaced in specific
versions with more appropriate text. For instance it is possible to assign a name to a chamber for
instance
– such as PC and RC for Pilot Compartment and Rescue Compartment. Alternative names
are fairly easy to configure – please consult Analox if necessary.
The alarm set-point menu provides the functionality to modify alarm set-points within the system.
Refer to the diagrams below. Note that different units of measurement will apply for different
systems.
%O2
LO
%O2
HI
ALARM
SETPNT
TOP: MAIN MENU
BACK
%O2 pO2
CO2
REM1
O2
REM2
DEPTH
BACK
BACK TOP
pO2
LO
pO2
HI
CO2
HI
CO2
HI HI
DEPTH
LO
DEPTH
HI
RESET
RESET
RESET
RESET
UP
UP
DOWN
DOWN
19.0% %O2 LO
23.0% %O2 HI
SET
SET
BACK
190 mBar pO2 LO
230 mBar pO2 HI
UP
UP
TOP
DOWN
DOWN
SET
SET
BACK
BACK
BACK
BACK
RESET
RESET
RESET
15.0 mBar CO2 HI HI
BACK
5.0 mBar CO2 HI
UP
UP
DOWN
TOP
DOWN
SET
SET
BACK
0.8 BarA DEPTH LO
UP
TOP
DOWN SET
BACK
BACK
BACK
RESET
BACK
9.0 BarA DEPTH HI
UP
TOP
DOWN SET BACK
Each sensor has two set-points, selected at the factory from very low, low, high and very high.
Therefore common cases could be two lo going alarms (low and very low), a high and a low alarm,
or two high going alarms (high and very high).
Typically oxygen and depth will have a low and high set-point, whereas toxic gases have a high
and a very high set-point.
Oxygen is treated as a special case. For life support, it is generally the partial pressure of oxygen
that is important. However, for fire risk, it is the percentage of oxygen that is of more concern.
Oxygen therefore can be provided with two types of alarms
– one pair of alarms on the partial
pressure of oxygen (pO2), and the other on the percentage of oxygen (%O2).
From the function keys (see figure above), the user will select the appropriate set-point to be
altered. The existing set-point is shown. Pressing F1 (DOWN) or F2 (UP) will decrease or increase