With the Gas Guard in operation, the incubator will use the gas supplied
by the tank connected to Inlet #1 until the pressure drops below 10 psig
(0.690 bars). At this time, the Gas Guard automatically switches to gas
supplied through CO2 Inlet #2.
In addition, the incubator automatically changes the Tank Sel in
Configuration Mode from 1 to 2 to indicate that the incubator is now
using gas supplied through Inlet # 2. If the gas supply to Inlet #1 is
replenished, the incubator will continue to operate using the gas supplied
through Inlet #2 unless the operator changes the Tank Sel from #2 to #1
through Configuration Mode. Refer to Section 3, Configuration.
Audible and visual alarms occur on the control
panel when the gas guard switches from one supply
to the other. The audible alarm sounds until the
operator presses the Silence key on the control
panel. The visual alarm in the Message Center reads
Tank 1 Low while the audible alarm is sounding,
but the message is removed when the operator
presses the Silence key. However, the ‘Tank Low’
indicator on the control panel stays lighted until the
condition is resolved. The unit operates normally.
Caution Both the audible and visual alarms described above do not ring
back once the Silence key is pressed.
s
If the Gas Guard system does not detect an adequate gas supply at CO2
Inlet #1 or Inlet #2, a visual and audible alarm will again occur on the
control panel. The visual alarm in the Message Center will read Tank
1&2 Low. The audible alarm will continue to ring until the Silence key is
pressed. The audible alarm will ring back every 15 minutes after the alarm
is silenced if the Gas Guard continues to detect that both gas supply
pressures are below 10 psig (0.690 bars).
The 310 Series incubators can be equipped with a humidity sensor (P/N
190643) to monitor the relative humidity inside the chamber. The sensor
is mounted to the top air duct and provides a signal that is displayed in
1% increments on the control panel. The humidity readout can be
displayed continuously or toggles with the temperature readout. In
addition, a low alarm limit can be set on the humidity readout, which will
detect when the humidity pan runs dry. Refer to Section 3,
Configuration.
6-6 Model 310 Series DH Incubator Thermo Scientific
Section 6
Factory Options
Humidity Readout
Operation of the CO2 Gas
Guard
Figure 6-7. Silence Key
To Next Page
Loading...
