1-8
Plant Growth Chamber
Thermo Scientific
Section 1
Installation and Start-Up
Instrumentation Port
3) RS-232 Output (Optional Kit P/N 3166245)
-This output is used for
two way communications between the growth chamber and a personal
computer. With the use of a communications/modem software
program, the user can record the temperature of the growth chamber at
their selected time periods and store it in a file for use with a
spreadsheet program. The user can also change the setpoint
temperature from their personal computer and periodically monitor the
actual temperature, setpoint temperature, and alarm status.
4) Recorder Output
- This is a DC millivolt output which represents the
temperature of the growth chamber. The recommended main use of
this is with a chart recorder having an input impedance of at least 1M
ohm. The scaled temperature output
change is 10mV°C. When the growth
chamber is operating at a negative
temperature, the chart recorder output
is still positive. Use the chart at right
to relate temperature to output voltage.
When connecting a chart recorder to
the recorder output connector, it is
recommended to use a shielded cable
with the shield grounded at the chart
recorder and to keep the cable short as
possible.
Located on the rear side of the growth chamber is an instrumentation port
for the user to insert sensor wires, external meter leads, etc. into the
chamber. The rubber plug provided must always be used in this port to
insure the uniformity specifications. An extra plug is supplied for the user's
convenience. Be sure to seal any gaps around the wire(s) going through the
plug.
Explanation of Auxiliary
Panel (continued)
