Labconco FreeZone 6 Liter Benchtop Freeze Dry Systems 77520 Series - Manual (Page 35)

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Chapter 6: Using the RS232 Receptacle
Product Service: Domestic 1-800-522-7658, International 816-333-8811
1. Data Rate 2400 Baud
2. 8 Bit word length
3. 1 Start bit, 1 Stop bit
4. No parity is transmitted
5. Standard ASCII character set
The time between data transmissions may be varied by the user to
occur at 10, 30, 60, 300 or 600 second intervals. Press the MENU
button until the RS232 screen appears on the display.
Press select until the desired time interval is shown.
The format of the transmitted message is as follows:
B<T= -48 V= 18 SF = 999 C=999 PG=9 >
Where:
B = Base Unit
T = Collector Temperature
-48 = Collector Temperature in °Celsius
V = Vacuum
18 = Vacuum Level in Micro Bars
SF = Shell Freezer Temperature (not available on 6L
Benchtop models)
9 = Feature not installed or out of range
C = Vacuum Chamber Temperature (not available on
6L Benchtop models)
PG = Purge (not available on 6L Benchtop models)
If a Stoppering Tray Dryer is attached to the Freeze Dryer and the
data interconnect cable is installed, additional data about that
accessory will be transmitted from the Freeze Dryer. See the
User’s Manual for the Stoppering Tray Dryer for a description of
the data.
There are several commercially available software packages,
which can read RS232 data and enter the data into a computer
program such as a word processor (to create a text file) or
spreadsheet (to tabulate and plot the data). Consult your laboratory
supply dealer regarding the latest software available. The
RS-232 TRANSMISSION RATE
10
SECONDS