Teledyne 2010A - Split architecture thermal conductivity analyzer User Manual
Page 31
Teledyne Analytical Instruments
Thermal Conductivity Analyzer
Part I: Control Unit
Part I 3-9
3.3.8 Rs-232 Port
The digital signal output is a standard RS-232 serial communications
port used to connect the analyzer to a computer, terminal, or other digital
device. It requires a standard 9-pin D connector.
Output: The data output is status information, in digital form, up-
dated every two seconds. Status is reported in the following order:
• The concentration in ppm or percent
• The range in use (01 = Range 1, 02 = Range 2, 03 = Range 3,
CAL = Range 4)
• The scale of the range (0-100 %, etc)
• Which alarms—if any—are disabled (AL–x DISABLED)
• Which alarms—if any—are tripped (AL–x ON).
Each status output is followed by a carriage return and line feed.
Input: The input functions using RS-232 that have been implemented
to date are described in Table 3-3.
Table 3-3: Commands via Rs-232 Input
Command
Description
as
Immediately starts an autospan.
az
Immediately starts an autozero.
rp
Allows reprogramming of the APPLICATION (gas use) and
ALGORITHM
(linearization) System functions.
st
Toggling input. Stops/Starts any status message output
from the RS-232, until st
rm1
Range manual 1
rm2
Range manual 2
rm3
Range manual 3
rm4
Range manual CAL
ra
Range auto
Implementation: The RS-232 protocol allows some flexibility in its
implementation. Table 3-4 lists certain RS-232 values that are required by
the Model 2010A implementation.