Invivo
2
300
UM-010 R4.0
Page 45 of 48
Invivo
2
300 User Manual
Gas mixer and gas consumption problems
The Invivo
2
300 workstation is fitted with a gas demand indicator (item 7 in Figure 9). When the gas
demand indicator is illuminated, the pressure is low in the workstation chamber. A shot of gas will be
injected into the workstation to raise the pressure in the workstation chamber. In normal operation,
the gas demand indicator should not illuminate more than once every 20 minutes when the
workstation is at rest. At rest is defined as the gasses are within Deadband and glove ports and SPES
are closed. Figure 37 gives a list of common problems related to the gas mixer and gas consumption;
Figure 37: Gas Mixer workstation related and gas consumption common problems
Problem
Potential Causes
Solution
The gas demand indicator
illuminates more than
once every 20 minutes
whilst at rest/ high gas
consumption
The Ezee Sleeves are not
correctly installed
The glove port cover is not
correctly closed
The cuff is not tight
around the users wrist
The humidifier tank is
empty
A gas cylinder is empty
The interlock inner and
outer doors are open at
the same time
The SPES has been left
open
The
workstation
has
developed a leak
Check the Ezee Sleeves are correctly installed. See
section 0 for more details
Check the glove port cover is in place and closed
correctly. Reclose the glove port cover if required
Ensure that the correct size Ezee Sleeve is used.
Ensure that the cuff is pulled tight around the
wrist. Roll up sleeves of clothing and remove
jewellery
Refill the humidifier tank. See section 7.2.1, for
more details
Check the ICO
2
N
2
IC gas mixer screen to see which
gas cylinder is empty. An empty cylinder will be
indicated by a low pressure status. Replace the
gas cylinder with a full cylinder
Close either the interlock inner door or the
interlock outer door
Close the SPES. See section 6.3 for more details
Contact your local distributor
In anoxic level mode, the
oxygen
concentration
does not reach 0.0%
There is no catalyst sachet
installed
The catalyst sachets need
replacing
Install a catalyst sachet. See section 7.2.4 for
more details.
Replace the catalyst sachets. See section 7.2.4 for
more details.
The gas mixer alarm is
sounding
A gas cylinder is empty
Check the ICO
2
N
2
IC gas mixer screen to see which
gas cylinder is empty. An empty cylinder will be
indicated by a low pressure status. Replace the
gas cylinder with a full cylinder
For all other ICO
2
N
2
IC Gas Mixer related problems, please refer to UM-011 ICO
2
N
2
IC user manual.
