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OPERATION
DATA OUTPUT CAPABILITIES
USB Outputs
The incubator generates data outputs describing the chamber temperature and CO
2
concentration
percentage as a digital log line, once per minute. These outputs are transmitted through a USB port
located on the back of the unit using RS232 serial protocol.
Required Software
Viewing and logging this output requires a terminal emulator program such
as the open source (BSD license) emulator, Tera Term.
Digital Outputs
Parameter Output Channel
2
Example logline output: C1=37.0 C3=5.0
Analog Outputs
The temperature and CO
2
levels are also outputted as analog signals by an internal 4-20 milliamp
board. The outputs are transmitted through two jack ports on the back of each incubator unit. The
ports connect to a standard audio jack and cable (male mono phono plug, ¼ inch (6.3 mm).
Jacks are not included with the incubator.
Jack Outputs
Parameter Parameter Value at 4mA Parameter Value at 20mA
2
2
2
Data Monitoring Systems – Max Resistance
For building management and other data monitoring or logging systems, the maximum resistance of
the current loop driven by either output from the 4-20mA module is 250 Ohms. At higher loop
resistances, the current value will be erroneously low for parameter values near the top of the scale.
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