Universal Rebreather Monitor

New product release
Closed Circuit Research is pleased to announce the launch of our range of Universal Rebreather
Universal Rebreather Monitor (URBM)
Single O2 cell and Dual HP package
Key features and benefits include:
● Real-time PO2 and decompression information displayed on VR wrist unit
● A hard wired Heads Up Display (HUD) which indicates PO2 and decompression status
● High pressure oxygen and diluent pressures displayed on the wrist unit with high usage rate
warnings and low tank pressure warnings.
● P02 set point alarms for the HUD, on user selected set points.
Please note that due to the substantial reprogramming that is required for the VR wrist unit to be
compatible with the monitor(s) some standard features of a stand alone VR3 must be removed,
as follows:
XB & XO the option to monitor information from a standard Rebreather 4th cell display and O2
analyzer has been disabled.
The IR link has been removed, therefore the VR can only be downloaded by using our USB
hardwire connector and the new Prolink 2007 software.
HP the stand alone High Pressure link option has been disabled. HP content information and
features are only available via the singe sensor, 2x HP Rebreather monitor.
Calendar function has been disabled
Please note: The Core Module is potted and sealed; there is nothing to be adjusted
inside. In the event of a failure, the entire Monitor must be returned intact. Any
attempt to gain access to the Core Module will void the manufacturers’ warranty.
Universal Rebreather Monitor (URBM)
Single O2 cell and HP package
Core Module
O2 sensor cap
(Can be supplied as
a cable end).
Hardware connections
Connect the white HP sensor and adapter to the HP port on your oxygen regulator
Connect the yellow HP sensor and adapter to the HP port on your diluent regulator
Fit both regulators to the cylinders turn on the gas supply slowly and check for leaks
Insert R17D sensor onto jack plug on the end of the oxygen cell cable (C10)..
Ensure the small cell retaining ring is inserted into the Y-Shaped cell holder; this prevents
the sensor from becoming dislodged from the jack plug.
Lightly lubricate the cap o-rings with silicone grease and screw the cable end into the cell
Setup screen Q start feature
A new feature added to the setup menu on the Universal Re-breather monitor is Q-Start.
This allows the user to choose between X (expert) and N (normal) modes.
N mode has all the normal settings available on a standard VR3
X mode gives the user a choice in the DVo screen to turn on Average depth display, and
large PO2 screen saver, also the choice to use Profile B or diluent as a bailout gas when
going from closed circuit to open circuit.
Instructions on how to access and navigate the setup screen are covered on page 19 and 25
in the VR3 manual.
Normal mode and Expert mode
The Rebreather monitor has two mode displays available normal mode N and expert mode
X. These are user selectable via the setup screen before diving (you cannot change this
setting during a dive).
In the picture above X mode option is highlight and activated.
Dry screen savers
When in N mode this is the screen saver display you will see, this displays a PO2 reading
and O2 and diluent tank pressures. When viewed with the colour screen option the tank
pressure colours correspond to the coloured tapes on the HP sensors, white for oxygen,
yellow for diluent.
X mode the dry screen saver is displayed with PO2 in large numbers in the bottom left of the
screen, HP contents and PO2 on the bottom right and current battery voltage and
temperature along the top line.
HP Sensor screen
This is the HP screen, accessible by a long press of the left switch when the HP contents
gauge symbol is displayed. It displays the current tank pressure of the O2 as WHT (white)
and diluent as YEL (yellow). These correspond to the colour tape on the sensor cables. It is
important to connect these correctly.
DVo Screen
This is the DVo screen accessible by a long press of the left switch when the DVo icon is
displayed in the home screen.
A quick press of both switches moves the cursor between functions.
XDec On activates real-time decompression calculations based on the external sensor
XDec Off diverts decompression calculations to the VR fixed set points.
HUD allows the user to adjust the brightness of the HUD from completely off to 9 which is
the brightest setting.
ScrSv Adjusts the time between home screen and screen saver. It can also give you the
option to switch the screen saver off.
BG Is the option for bigger graphics
Light adjusts the backlight options
Stop D allows the user to choose the final stop depths; 3m (10ft), 4.5m (15ft) and 6m (20ft).
For further information on the DVo screen please refer to page 16 to 18 of the VR3
To calibrate the O2 sensor please follow the instructions on page 57 of the VR3 manual.
On Screen Warnings
Any system warnings are shown in the top right hand display; the warning in this picture
shows HP diluent and O2 pressures and no signal from the external oxygen cell.
When using a colour screen the right-hand side of the display changes to red to draw the
diver’s attention to the fact that a warning is in force.
Screen saver in dive mode
Screensaver is the screen view that cuts in after a short delay when no switch has been pushed,
(the delay period can be set in the Dvo screen see Pg 7 of this guide.) When a switch is pushed
the screen view returns to dive or surface mode, whichever is appropriate.
Current PO2 is displayed in large letters.
Current depth and time is displayed at the top of the screen.
Any current system warnings are displayed in the top right corner.
HP contents and PO2 are displayed on the bottom right corner.
DECO is displayed in the top right when decompression is entered (unless it has been over
written by a warning): further information on the decompression dive screen can be found on
page 45 of the VR3 manual.
HUD Operations
The Heads Up Display (HUD) is designed to fit on a mounting bracket and attach to the side
of the mouthpiece of the rebreather, it contains 2 LEDs, one red and one green.
PO2 HUD parameters
PO2 within 0.2 of VR set point (normally set at the PO2 of the rebreather’s set point
controller). Instructions on how to adjust the VR set point is on page 39 of the VR3
PO2 more than 0.2 below VR set point.
PO2 more than 0.2 above VR set point
Within +/- 1 metre (3 feet) of decompression stop depth.
In decompression and below the decompression ceiling,
Decompression ceiling violated (descend until RED LED turns SOLID)
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PO2 is > 1.6 or <0.3.
Red LED will flash slowly on surface mode this is so the diver knows it is operational before
a dive.
CCR Bailout Options
When bailing out to open circuit follow the instructions on page 40 of the VR3 manual.
When X mode is selected in Q-Start and you bailout to open circuit you get the option
either to bailout to your diluent gas (DIL) or to one or more deco gases that you leave preset
in profile B (PrB). To select this option make a quick switch on the corresponding symbol,
check the details are correct on the select screen and tick it. You are now on your bailout
gas. The instructions on how to add and save a profile are on page 20 of the VR3 manual.
Once in open circuit mode the XDec information is automatically switched off, the
Screen saver mode is also disabled. The red HUD decompression LED will still be active
and can still be used as a guide when decompressing in open circuit mode.
If Closed Circuit mode is activated again the XDec automatically switches on and calculates
decompression based on the current PO2 reading from the external oxygen cell.
If you enter the Bailout warning screen in error a long push on both switches (ABORT) will
return you to the dive screen.
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