Eppendorf Biological Shakers Innova 44R - Manual (Page 31)

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Biological Shakers Innova® 44/44R — Operating manual
7.6 Glide-up door
The Innova 44/44R is equipped with a space-saving glide-up door.
When the door opens, the following will happen:
• Heater turns off
• Shaker stops
• Interior light goes on and, when it is in AUTO mode, will remain on for 15 seconds after the
door is closed
• UV germicidal lamp (if so equipped) turns off
• Photosynthetic lights (if so equipped) turn off.
7.7 Spill pan/water reservoir
The Innova 44/44R is equipped with a spill pan to protect the drive mechanism in the case of
accidental spills and/or broken glassware. This pan can also be used as a water reservoir to
humidify the chamber and to reduce evaporation. An optional factory-installed humidity monitor is
also available.
7.8 Software interfaces
The RS-232 port is located below the Power Switch on the right side of the control panel
(see Fig. 12 on p. 26). It can be used to interface a PC to the shaker for control of operating
conditions or data logging applications (see Appendix A: Remote programming on p. 64).
The customer is responsible for securing the proper driver to interface with the RS-232.
7.9 Interior light(s)
When the LAMP screen is in its default AUTO mode, the interior (“chamber”) light is activated for
15 seconds whenever you turn the Control Knob. It will automatically shut off after 15 seconds of
Control Knob inactivity.
The chamber light will also go on when the door is open.
In addition, you can set the chamber light to be continuously ON or OFF by selecting either mode
in the LAMP screen.
There are two additional light options for refrigerated units only: interior photosynthetic growth
lamps (see Optional photosynthetic lamps on p. 35) and a UV germicidal lamp located outside
the chamber but in the airflow path (see Optional UV germicidal lamp on p. 35).
7.10 Heater
The chamber temperature is sensed by a 1000 ohm platinum RTD. The heater is controlled using
pulse width modulation on a 2.5 s duty cycle. This cycle time is fast enough to prevent noticeable
changes in air temperature due to the cycling.
Whenever the heater is on, the Heater On icon will appear in the display. The heater
automatically stops running when the door is opened.
7.11 Refrigeration (44R only)
The refrigeration system in the Innova 44R is a fixed-capacity system carefully designed to
maintain the setpoint, to balance pressure within the system, and to prevent freezing on the
evaporator surface.
When the shaker is powered up, there is a four-minute time delay prior to compressor start-up.
7.12 Service accessibility
In the unlikely event that your Innova 44/44R should need service, all electronic boards,
refrigeration and heating components are mounted on a pull-out drawer mechanism which is
easily accessed, by an authorized service technician, from the front of the shaker.
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