Phcbi MCO-170M Instrucciones De Operación página 39

Automatic N
When the O density level remains unchanged, even though the N
2
unit regards the currently connected N
changed over automatically. The process is set out in Table 2 (when two N
1. When there is gas remaining in cylinder A, the unit operates with gas supplied from cylinder A
(Situation 1).
2. When cylinder A is empty, the level of O
supplied into the unit even though the gas valve in the unit is open (Situation 2).
3. When Situation 2 continues for 2–3 minutes, the gas supply line is changed over automatically. The
N /O gas empty alarm is activated sounding the buzzer, and gas supply indicator A is displayed in
2 2
reverse video and blinks (Situation 3).
4. Stop the N /O gas empty alarm by pressing "Buzzer". The light on gas supply indicator A is turned off
2 2
(Situation 4).
5. Exchange the empty gas cylinder A for a new one immediately (Situation 5).
6. When cylinder B is empty, the supply reverts to cylinder A.
Table 2. N /O gas supply line automatic changeover (when two N
2 2
Situation
Supply line Cylinder A Cylinder B
N gas is supplied
2
1
from valve A
O density in the
2
chamber is on the
increase even though
2
the N /O gas valve is
2 2
open
N /O gas supply line
2 2
is automatically
3
changed to valve B
"Buzzer" is pressed
4
New cylinder A
5
fitted
Notes:
• When the Buzzer key is not pressed in Situation 4 and cylinder B becomes empty before cylinder A is
replaced, the supply will switch back to cylinder A. In this case, replace both cylinders and press
"Buzzer" immediately.
• The automatic changeover of N
automatic changeover of cylinders may also occur in the situations where, e.g. the gas tube gets
clogged, gas is leaking, the gas pressure has dropped, the valve on the gas cylinder is insufficiently
open etc, even though the cylinder being used is not completely empty.
gas (O gas) cylinder changeover
2 2
gas (O
2 2
density in the unit is on the increase because N
2
N gas
2
A Remaining Remaining
A Empty Remaining
B Empty Remaining
B Empty Remaining
B Remaining Remaining
gas (O gas) cylinders is linked to the O
2 2
/O gas valve in the unit is open, the
2 2
gas) cylinder as empty. The N
gas cylinders are connected).
2
gas cylinders are connected)
2
N /O gas supply line indicator
2 2
and blink
/O gas supply line is
2 2
gas is not
2
Message
A B display field
Light on Light off
Light on Light off
Reverse Err02:
video Light on N2/O2 Gas Empty
(and buzzer)
Light off Light on
Light off Light on
density in the chamber. The
2
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