ANALOX SA1 W75 SR 60 N 564 User manual

Analox Ltd.
15 Ellerbeck Court, Stokesley Business Park
North Yorkshire, TS9 5PT, UK
T: [phone] F: [phone]
W: www.analox.net E: [e-mail]
Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
SA1 W75 SR 60 N 564

Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref: AS2-802-14 - January 2016
Page 1
List of Contents
1Packaging contents check..................................................................................................3
2Introduction.........................................................................................................................4
3Operation............................................................................................................................5
4Installing batteries...............................................................................................................7
4.1 Main batteries .............................................................................................................7
4.2 Backup batteries.........................................................................................................7
5Connecting an external supply...........................................................................................8
5.1 External power (9-40VDC)..........................................................................................8
5.2 External power (100-240VAC)....................................................................................8
6Calibration...........................................................................................................................9
6.1 Readout check............................................................................................................9
6.2 Use of calibration gas.............................................................................................. 10
7Data logging..................................................................................................................... 11
7.1 Installation of data logging software on a PC.......................................................... 11
7.2 Data logging program overview............................................................................... 13
7.3 Data logging configuration....................................................................................... 13
7.4 Data logging retrieval of data................................................................................... 15
7.5 Data logging data analysis ...................................................................................... 16
8Maintenance .................................................................................................................... 17
8.1 Regular maintenance schedule............................................................................... 17
8.2 General care............................................................................................................ 17
9Safety warnings ............................................................................................................... 18
9.1 Oxygen sensor......................................................................................................... 18
9.2 Hyperbaric tested batteries...................................................................................... 18
10 Specification ................................................................................................................ 19
11 Warranty information ................................................................................................... 20
12 Disposal....................................................................................................................... 21
13 Appendix A .................................................................................................................. 22

Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref: AS2-802-14 - January 2016
Page 2

Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref: AS2-802-14 - January 2016
Page 3
1 Packaging contents check
a) SUB MkIIP main unit (Part Number SA1 W75 SR 60 N 564)
b) External supply cable (Part Number SAEP AS2 605)
c) User manual
d) Test certificates
e) Analox hyperbaric tested batteries (x4) (Part Number 2557-4625)
Optional:
f) Data output cable (Part Number SAEP AS2 602) and software for data logging facility
when ordered
g) Universal AC to DC external supply cable (Part Number SA2 W75 UNIPOWER)
h) Calibration adaptors (Part Number 8000-0069A, 2 Required) and tubing (Part Number
1817-5000)

Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref: AS2-802-14 - January 2016
Page 4
2 Introduction
The SUB MkIIP is a combined oxygen and carbon dioxide (CO2) monitor. Oxygen is
monitored by an electrochemical cell and CO2is monitored by an infra red absorption
technique. Temperature compensation is automatically applied for oxygen data and both
temperature and pressure compensation is automatically applied to the CO2data.
The unit can be powered internally by alkaline batteries or by an external DC supply. An
optional Universal AC to DC external supply cable is also available.
In addition to the power switch, the standard instrument has only one operator control. A
single pushbutton controls backlights for each of the liquid crystal displays (LCD), and can
also be used to reset the elapsed time.
The unit is built in a waterproof enclosure which is vented to prevent collapse in hyperbaric
environments. The lid of the unit should only be opened in clean, dry environments. This
should only be necessary for calibration purposes or for changing batteries. The battery life
is long enough that during typical usage in a distressed or disabled submarine (DISSUB)
incident, there should be no need to change the batteries.
Gas levels are monitored by diffusion across waterproof membranes built into the unit. The
user should ensure that the instrument’s gas inlet ports remain as clean as possible to
prevent the protective membranes from becoming blocked.

Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref: AS2-802-14 - January 2016
Page 5
3 Operation
The external appearance of the SUB MkIIP is shown in Figure 1.
Figure 1 - External View of Instrument
Operation of the SUB MkIIP is simple, the only controls are the power switch and a single
pushbutton switch. To switch the unit on, turn the power switch to either the 'Battery' or
'External' position. Either an external supply or batteries must be installed in order for the
unit to operate.
If the unit does not turn on, perform the following checks:
a) check that either the external power supply or batteries are healthy
b) check that the fuses in the external supply line or the battery circuit are not blown
On powering up the instrument, the sensor readings may take a short time to settle,
particularly the CO2sensor, which can take about 40 seconds to ‘warm up’. During this
period, the CO2display shows “----“ to hide any erroneous measurements.
Sensor readings are updated approximately every two seconds.
The choices of measurement units for each parameter are defined at the time of order and
are factory set.
Oxygen readings are displayed in %SEV (percent surface equivalent).
CO2 readings are displayed in %SEV (percent surface equivalent).
SUB Mk II
P
BACKLIGHT SWITCH
OXYGEN SENSOR
SUPPLY
SWITCH
CARBON DIOXIDE
SENSOR
BATTERY
CONDITION
ELAPSED
TIME
MAINTAIN PRESSED
TO
RESET ELAPSED TIME
BACKLIGHT
DD:H
H
EXT
POWER
OFF
ESTIMATED
HOURS
BATT
CARBON
DIOXIDE
TEMPERATUR
E
DEPTH
FSW
OXYGEN
%SEV
°F
%SEV

Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref: AS2-802-14 - January 2016
Page 6
Depth readings are displayed in FSW (feet sea water)
Temperature readings are displayed in °F (Fahrenheit).
The battery condition indicator provides an estimate of the number of hour’s battery life
remaining. The actual battery life achieved can be heavily influenced by temperature. It is
possible under certain conditions to considerably exceed the estimated battery life.
The instrument readings will remain accurate until the batteries are exhausted. The
brightness of the backlights will fade as the batteries discharge. When the Battery Condition
indicator reaches 168 hours, new batteries should be inserted for applications where 7-day
continuous emergency operation is required.
The battery condition indicator will indicate ‘E-Pr’ when the instrument is operating from an
external power supply.
The backlight is turned on by momentarily pressing the pushbutton on the front of the
instrument. The backlight will turn off automatically after a short period. A flashing indicator is
built into the backlight switch to show that the instrument is operating. This can also be used
to locate the backlight switch in low light conditions.
The Elapsed Timer is reset to zero by pressing and holding the pushbutton for approximately
two seconds. The Elapsed Time is displayed as the number of days and hours since the
timer was last reset. The timer is maintained even when the instrument is switched off. The
timer will stop when it reaches 99 days and 23 hours. Resetting the elapsed time, will also
clear existing data from the data log memory and restart the data log period.
It is intended in a DISSUB incident for example, that the Elapsed Timer, and thus data log
period, is reset at the start of the incident. The timer will then indicate the elapsed time from
the start of the incident in days and hours.

Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref: AS2-802-14 - January 2016
Page 7
4 Installing batteries
4.1 Main batteries
The instrument is fitted with four 'D' size 1.5v alkaline cells. Although the instrument will
operate from other types of D size battery, their use is not recommended. The operating life
using batteries such as zinc chloride or nickel cadmium will be significantly less than with
alkaline. Batteries with cell voltages in excess of 1.5v must not be fitted.
The instrument is designed such that if a new set of alkaline batteries is installed at annual
maintenance, and if the equipment is then powered for 1 hour every month for testing
purposes, then in the event of a DISSUB incident, the batteries will power the instrument for
in excess of ten days. A DISSUB incident is believed to be no longer than seven days,
therefore under these conditions there will be no need to access the batteries during the
incident. It is assumed that the backlight would only be used on an occasional basis during
this period, since it has the biggest effect on battery life.
To replace the batteries:
a) In dry conditions (to prevent damage) open the lid of the instrument using the two
catches beside the handle
b) Undo the two Velcro retaining straps around the batteries
c) Ease each battery from its clips - use one hand to grip the battery and the other hand to
apply a little pressure to release the clips.
d) Insert the new batteries, taking care to observe the polarity markings on each of the
battery holders, and ensuring that the battery is retained by the clips in the holder. Fitting
the batteries incorrectly could cause them to leak.
e) Refasten the Velcro retaining straps to prevent the batteries becoming dislodged from
their holders inadvertently.
f) Close the lid of the instrument, and secure in place with the two catches.
4.2 Backup batteries
The instrument is also fitted with 2 additional LR43 Alkaline Manganese cells to maintain the
Real Time Clock within the instrument. The Real Time Clock is used to calculate the elapsed
time and for instruments with the data logging option.
These cells are mounted on the main printed circuit board on the underside of the lid. The
batteries should be replaced at 5 year intervals. Observe the polarity markings on the cell
holders, positive uppermost.
The instrument will operate without these batteries fitted, although the Elapsed Time function
will not operate when switched off. Data logging functions (where fitted) will also be affected.

Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref: AS2-802-14 - January 2016
Page 8
5 Connecting an external supply
5.1 External power (9-40VDC)
An 9-40V DC external power cable is supplied with all SUB MkIIP monitors, as standard. The
connector end of this cable attaches to a female mating connector on the left-hand side of the
unit. A protective dust cap must be unscrewed prior to attaching the external supply lead.
The other end of the cable is presented as stripped ends for the customer to connect a
suitable plug of their choice. The color coding is as follows:
Core Color
Signal Name
Connect to
Red
Positive (+ve) Supply
+9 to +40 V DC
Blue
Negative (-ve) Supply
0v
The external supply must be a stable DC supply in the range 9-40V. Typical current
consumption figures are shown below
Input Voltage (V DC)
Load Current
without backlight (mA)
Load Current
with backlight (mA)
9.0
160
315
12.0
105
340
24.0
55
290
40.0
37
270
5.2 External power (100-240VAC)
An option is available to power the SUB MkIIP with a universal 100-240VAC external supply
cable.
Universal AC to DC external supply cable part number SA2 W75 UNI POWER.
The connector end of this cable attaches to a female mating connector on the left-hand side
of the unit. A protective dust cap must be unscrewed prior to attaching the external supply
lead.
The other end of the external power cable is presented as a standard 115VAC polarized plug;
you have the option to change plugs to suit local sockets. To change the plug, hold the
adaptor with the cable end closest to you, and push the plug off the main body of the adaptor.
Slide your required plug onto the main body of the adaptor. The adaptor can then be plugged
into a mating power socket.

Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref: AS2-802-14 - January 2016
Page 9
6 Calibration
Factory Calibration is required at least once every 12 months to replace the electrochemical
oxygen sensor.
6.1 Readout check
It is recommended that a readout check is performed on a routine basis as part of emergency
equipment checks and drills.
The readout check can either be performed using certified test gases or in a verified
atmosphere. The SUB MkIIP should be turned on and allowed to warm up (at least 40
seconds) before readings are taken. Test gases should be piped as described in Section 6.2.
Atmospheric measurements should be made in an atmosphere whose constituents have
been measured by verified O2, CO2and pressure sensors (e.g. CAMS).
Once the readings on the SUB MkIIP have settled, take readings for O2, CO2and pressure. If
using certified test gases, the readings should be within the tolerances in the center column of
the table below. When the SUB MkIIP is being verified against a CAMS verified atmosphere,
use the right hand column as a guideline to the acceptable tolerance. Also ensure that the
SUB MkIIP is sampling the atmosphere from the same compartment as the CAMS.
To convert the CAMS Gas reading from units of Torr to %SEV, use the following formula:
%SEVinReadingEquivalentCAMS
750 100TorrinReadingGasCAMS 

To convert the CAMS Pressure reading from units of Torr to FSW, use the following formula:
FSWinReadingEquivalentCAMS32.8-
750 32.8TorrinReadingPressureCAMS 






Parameter
SUB MkIIP specification
(to be used with certified test gas)
SUB MkIIP vs. CAMS Allowable
Tolerance
(to be used at 700 to 900Torr
compartment pressure and 50 to 90°F)
Oxygen (O2)
An accuracy of ±1% for SUB MkIIP reading
over a 0 to 200%SEV range and ±2 display
counts;
(SUB MkIIP Reading)(0.01)+0.2 = (± _%SEV*)
± 0.74%SEV*
Carbon
Dioxide (CO2)
An accuracy of ±5% of a 10%SEV CO2 range
for readings 0 to 4.99%SEV and ±2 display
counts; (±0.52%SEV*).
An accuracy of ±10% of a 10%SEV CO2 range
for readings 5 to 10%SEV and ±2 display
counts; (±1.02%SEV*).
± 0.52%SEV*
Pressure
±0.15% of 300FSW range and ±2 display
counts; (±0.7 FSW*) at STP.
±0.5% of 300FSW range and ±2 display
counts; (±1.7 FSW*) otherwise.
±1.75 FSW*
*Applicable Readout Tolerance
If the readings are outside these tolerances the SUB MkIIP requires calibration.

Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref: AS2-802-14 - January 2016
Page 10
6.2 Use of calibration gas
Use of test gases should only be performed by suitably trained personnel familiar with the
handling and use of calibration gases. Test gases should only be used in a well ventilated
area. The instrument has been designed to allow the use of a wide range of certified test
gases from various suppliers.
The oxygen and CO2 sensors are located immediately adjacent to the corresponding displays.
The calibration adaptor supplied with the instrument will be required and should be fitted as
shown in Figure 2. The longer free pipe should be connected to the outlet of a test gas bottle
flow regulator. The flow adaptors in the chain should then be firmly inserted into the Oxygen
and CO2sensor inlets. The shorter free pipe is merely an exhaust which prevents
atmospheric contamination of the gas in the last sensor and should not be blocked. The Gas
flow from the regulator should be set to between 0.05 and 0.26 US gal/min (0.2 and 1.0
ltr/min).
Figure 2 - Typical Use of Test Gas and Calibration Adaptor
BATT
EXT
OFF
DD:HH
MAINTAIN PRESSED TO
RESET ELAPSED TIME
ELAPSED TIME
BACKLIGHT
CONDITION
BATTERY
HOURS
POWER
ESTIMATED
%SEV
FSW
DEPTH
OXYGEN
TEMPERATURE
°F
SUB Mk II P
CARBON
DIOXIDE
%SEV

Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref: AS2-802-14 - January 2016
Page 11
7 Data logging
The data logging option allows the SUB MkIIP to record up to 14000 sensor readings and to
output the stored data to a computer for analysis purposes.
An Analox utility installed on the computer allows the instrument to be configured to store any
combination of oxygen, carbon dioxide, depth or temperature at selected time intervals
varying from 10 seconds to 30 minutes.
The user could for instance opt to record just the carbon dioxide reading at 30 minute
intervals. In this case 14000 readings will provide an endurance of over 10 months.
Alternatively, the user could opt to record all four parameters at 10 second intervals, in which
case the endurance would be approximately 10 hours.
By choosing an appropriate interval, the user can store the maximum amount of information
over a chosen time period. If the data logging option is ordered the SUB MkIIP is factory set
to record all 4 parameters once every 5 minutes and to ignore newer data, this will provide
approximately 12 days of data storage to ensure all data from a DISSUB event is captured.
A cable is supplied to connect the SUB MkIIP to the serial port on a PC. The cable is fitted
with a 9 way female D-type connector. An adaptor will also be required if using a PC with a
25 way D-type connector. If the PC does not have serial port an Analox compatible USB to
serial adaptor would be required.
7.1 Installation of data logging software on a PC
The data logging software is compatible with IBM Personal Computers and compatibles
running Windows 95, 98, ME, 2000 or XP software (Note that administrator privileges are
required for correct installation when using Windows 2000 and XP systems).
1. Insert the software installation disk into the disk drive on your computer.
2. From the Start Menu on your desktop select RUN.
3. Type D:INSTALL.BAT or use the Browse feature to locate the file INSTALL.BAT on
the Disk Drive (assumed to be D:). When the file is installing an MSDOS type screen
will appear, this will disappear when installation is complete.
4. Install.Bat simply transfers the file DataLogInterface.exe to the directory C:\Analox
and creates a shortcut to this file.
5. Now move the shortcut to your desktop, by right hand clicking on the Shortcut file and
select Send To and then Desktop.
6. From your desktop now double click on the new shortcut Icon that you have just
created.

Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref: AS2-802-14 - January 2016
Page 12
7. The following screen will appear.
8. Make sure the ‘Send checksums’ box is NOT selected.
9. Now connect the PC to the SUB MkIIP using the data lead provided and ensure that
the instrument is switched on. Note whether it is connected into COM1, COM2,
COM3 or COM4 on the PC.
10. ENSURE THAT THE CORRECT ‘COM’ PORT IS SELECTED –PRESS THE
SELECTION ARROW ADJACENT TO ‘COM’ AND SELECT 1 TO 4 AS
APPROPRIATE. THIS SETTING WILL BE REMEMBERED THE NEXT TIME YOU
START THE PROGRAM.
11. Always ensure that the Baud rate is set to 9600, to which it will default.
12. Click on the ‘Communicate with Instrument’ button. You will see a message ‘Please
wait’ and if successful, the ‘Instrument Status’ tab will be selected.
13. If you get a message ‘No Reply from Instrument’ check the following:
a) The SUB MkIIP is switched on
b) The D-type connector is connected between the SUB MkIIP and PC
c) The correct COM port is selected.
d) No other devices are attempting to use the COM port (e.g. mouse drivers)
Now click ‘OK’ to the No Reply from instrument message and retry
communications.
14. When you successfully establish communications, the following screen will appear.
You are now ready to use the program.

Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref: AS2-802-14 - January 2016
Page 13
7.2 Data logging program overview
The data logging program is split into a number of pages or tabs. These are Instrument
Comms, Instrument Status, Preview Graph and Instrument Setup as shown in the diagram
below.
Instrument Comms appears during the installation process, the Instrument Status, Preview
Graph and Instrument Setup pages are used during data logging set up, activation and data
retrieval. The ‘Preview Graph’ is a small utility, allowing you an overview of the data that has
been logged. It is not intended to replace the need for a spreadsheet. To use the graph
select the variable that you wish to view and a graph will be automatically generated. This
process will suspend logging; you will therefore need to click on the ‘Restart logging’ button
on the Instrument Status page.
The Instrument status page provides a summary of the instruments data logging status and is
shown in the diagram on the previous page. This page shows the Memory status of the SUB
MkIIP. The Information Panel to the right of the screen shows us the current status of the
instrument. The instrument has been configured to ignore new data when the memory is full.
The instrument is recording all parameters (Oxygen, carbon dioxide, depth and temperature)
at 5 minute intervals. All of these features are configurable on the Instrument Setup page.
The 5 command buttons will be explained in Section 7.3.
7.3 Data logging configuration
Click on the ‘Instrument Setup’ tab and the following screen will appear.

Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref: AS2-802-14 - January 2016
Page 14
Disable Logging:
If you do not want data logging to take place at all, press the ‘Disable Logging’ button.
‘Logging disabled’ will be shown on the Instrument Status page.
Logging Options:
Select the data items that you wish to record from O2, CO2, Depth and Temperature, by
clicking on the box next to the parameter you require, if the box has been successfully
selected a will appear.
Logging Resolution:
Select the Logging Resolution you require by clicking on the ▼ arrow, and then clicking on
the time interval you want. This is the time interval between logged readings, which can be
set to one of various values between 10 seconds and 30 minutes. Please be aware that the
shorter the time interval, the shorter the data storage period. For example logging just CO2at
2 minute intervals will give approximately 4 days of continuous data storage, where as logging
O2, CO2, Depth and Temperature at 10 second intervals will result in approximately 2 hours of
continuous data storage. The wording ‘continuous’ refers to the unit logging when left
permanently switched on. If the instrument is switched off, e.g. overnight, this time period will
be extended.
Note there is a slight overhead every time the instrument is switched on and off, so the
number of data points recorded will be slightly reduced each time the instrument is switched
off and on. In normal daily use this reduction will not be apparent.
Full Memory:
This option enables you to specify what the instrument should do when its data logging
memory is full.
You may choose to ‘Ignore newer data’ if for example you are conducting a specific test run,
using a short logging resolution, and you only require data from that test. By ignoring new
data you will ensure that you retain your test data until you have been able to download it to a
PC.
Alternatively you may choose to ‘Discard older data’ if you want the instrument to essentially
keep on logging for ever, and you only intend to download the data following an incident you
want to investigate.
Once you have set each of the 3 options described above (Logging Data, Logging Resolution
and Memory Full options), press ‘Clear Instrument and Setup for Logging’. This transfers the
selected options to the instrument. It also transfers the date and time from your PC to the
instrument. Make sure the Date and Time on your PC are correct!
You will be asked to confirm whether logging should ‘Start Immediately’, or the next time the
instrument is switched on (‘Start at next Power-Up’). This enables you to optimize the data
storage time by leaving the instrument switched off until it is required.
Reset log with Elapsed Time:
Select this option if you wish to enable the Reset log with Elapsed Time option, by clicking on
the box. If the box has been successfully selected a will appear.
With this option enabled the data log period will be reset and any existing data in the data log
memory cleared, when the Elapsed Timer is reset to zero (see Section Error! Reference
source not found.). Enabling this option will ensure that data is logged during any DISSUB
incident for later analysis.

Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref: AS2-802-14 - January 2016
Page 15
7.4 Data logging retrieval of data
1. Start up the Data logging program by clicking on the shortcut on your desktop.
2. Click on the ‘Communicate with Instrument’ button. This will automatically take you to
the Instrument Status page.
3. The Memory Status will show the Status of the instrument at the present moment in
time. If you wish to refresh this status simply click the ‘Refresh Status’ button.
4. Press the ‘Suspend Logging’ button if you wish to stop the SUB MkIIP storing data
temporarily. The SUB MkIIP will automatically resume the next time it is switched on,
or when the Restart Logging ‘button’ is pressed.
5. Press the ‘Gather and Save Data’ button to transfer data from the SUB MkIIP to the
PC. Note this will automatically Suspend logging if you have not already done so.
6. Please wait while the instrument transfers data to the PC. An estimate is provided of
the time required for the data transfer to complete. If no problems occur in the
transfer process, a screen will appear inviting you to save the log file.
7. In the Save as type box, select the type of file that you wish to save. Let us assume
that we are trying to create a Microsoft Excel spreadsheet. Therefore select an Excel
compatible .csv file. (CSV stands for a Comma Separated Variable file, and is a
format that most spreadsheet programs will recognize).
8. Now select the folder and enter the filename that you wish to use for the file. The
program will remember the filenames that you have used previously. Initially the
default will be c:\My Documents\0Analox00. If you choose to retain this format, the
program will automatically suggest the next number 0Analox01, 0Analox02 etc for
future files. The 0 at the start is meant to signify which instrument you are
transferring data from if using multiple instruments.
9. You will then be asked if you want to delete the data already in the instrument.
Answer Yes or No as appropriate. Answering ‘Yes’ will avoid retrieving the same
data again at a future date. You will then be asked when you want logging to
commence, click ‘Start Immediately’ or ‘Start at next Power-Up’ as appropriate.
You may choose not to discard the data until you have inspected the data for
correctness and click No. This will leave the data shown in the Memory Status. You
can then use the ‘Discard the Data From the Instrument’ button to delete the data at
your own discretion. You will need to reactivate the logging by clicking the ‘Restart
logging’ button.
10. If you are retrieving data from a number of instruments, connect the PC to the next
instrument and press the ‘New Instrument’ button. Retrieve the data as explained in
steps 5 to 9.

Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref: AS2-802-14 - January 2016
Page 16
7.5 Data logging data analysis
Microsoft Excel is not provided with the Analox system. If you do not have a copy of
Microsoft Excel, other spreadsheets will also allow access to the data. These
instructions are limited however to the use of Excel. You may choose to access the
data in a variety of ways, either via Excel or Windows Explorer. These instructions are
based on loading the file from Excel.
1. Start Microsoft Excel from your Start Menu or from your desktop.
2. Select File, Open and then navigate to the folder in which you chose to store the data
file (e.g. in c:\My Documents).
3. Select files of Type ‘Text Files’. All of the CSV files in the chosen folder will appear.
Click on the file that you wish to inspect, and then click on ‘Open’
4. The data from the file will then appear in a standard Excel Worksheet.
5. Note that the first column of data is the date and time of the reading. This field is too
wide to fit in the standard width of the cell. Click on the ‘A’ at the top of the column,
and then select Format, Column, and Autofit Selection. Or simply drag the column
separator between ‘A’ and ‘B’ to achieve the right width.
6. Select the right format for the Date and Time. Click on ‘A’ at the top of Column A,
then press Format, Cells. On the ‘Number’ tab, under category, select ‘Date’, and
then under ‘Type’ select 03-04-97 13:30 or similar.
7. Now to graph the CO2 reading, click on the ‘A’ at the top of Column A, then press and
hold the CTRL key on the keyboard, and click on the ‘C’ at the top of the CO2
column. Then click on Insert, Chart (or press the small Chart Icon on the toolbar if
you have one).
8. Under ‘Chart Type’ choose XY scatter, and under ‘Chart Sub Type’ choose the type
of lines that you wish on the chart. (Hint –Use Scatter with data points connected by
lines).
9. Now press ‘Finish’ or choose ‘Next’ if you wish to refine the appearance of the graph.
10. A graph will appear on the screen with the x-axis showing the date and time, and the
y-axis showing the CO2 reading.
11. The basic appearance of the graph can now be edited, but to do so requires
familiarity with Microsoft Excel. There are several books available at almost any
computer store on this subject.

Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref: AS2-802-14 - January 2016
Page 17
8 Maintenance
8.1 Regular maintenance schedule
Regular Maintenance consists of the following tasks:
FREQUENCY
Monthly
Check that the instrument is maintained in a clean state. In particular ensure that
the gas inlet ports and breather port are unobstructed. When necessary, clean
the instrument with a dampened cloth.
Check the battery condition indicator. Change the batteries when the indicator is
less than 168 hours. Replace with Analox P/N 2557-4625 (Hyperbarically tested
D-cells)
Check the SUB MkIIP readings in a verified atmosphere
Annually
Factory calibration is required at least once every 12 months to replace the
electrochemical oxygen sensor.
Where the instrument is used as a standby for use in emergencies, replace the
main batteries as detailed in Section 4.1
Five Yearly
Change the Backup batteries as detailed in Section 4.2
8.2 General care
The SUB MkIIP is designed to be water resistant to a depth of 1 meter. However it should be
noted that the instrument is not designed to operate when submerged and should not be
intentionally immersed in liquid or left outside unprotected.
In the event of submersion in water the unit should be dried with a soft cloth. Care should be
taken to ensure that all water is removed from the two gas ports on the front face of the unit.
When clearing the CO2sensor port, care should be taken not to damage the delicate black
bead of the temperature sensor as shown below:

Sub MkIIP Oxygen & Carbon Dioxide Monitor
User Manual - US Navy Version
Document Ref: AS2-802-14 - January 2016
Page 18
9 Safety warnings
9.1 Oxygen sensor
The oxygen sensor is an electrochemical device and contains a caustic electrolyte. Always
check to make sure that it is not leaking and do not allow it onto any part of your body or
clothing.
When the life of the sensor has expired or it is leaking or otherwise damaged it must be
disposed of safely in accordance with local regulations.
The sensor contains Potassium Hydroxide solution (KOH) which is hazardous and can have
the following effects:
Body Part
Effect
First Aid Procedures
Skin
Contact could result in a
chemical burn.
Wash the affected part with a lot of water
and remove contaminated clothing. If
stinging persists get medical attention.
Ingestion
Can be harmful or FATAL if
swallowed.
Drink a lot of fresh water. Do not induce
vomiting Get medical help immediately
Eye
Contact can result in the
permanent loss of sight.
Wash with a lot of water for at least 15
minutes and get medical help immediately
9.2 Hyperbaric tested batteries
All D-type batteries supplied by Analox for use in the SUB MkIIP are hyperbarically tested.
These batteries are available as spares from Analox as Part No 2557-4625.
Please ensure that any replacement batteries used in the SUB MkIIP are suitable for use in
hyperbaric atmospheres.