Instruction Manual Model 3100 Analyzer
Manual P/N: C5-06-4900-16-0
Manual file name: MN-A-0005, Rev. C
Page 25
PARITY > None
STOP BITS > 1
FLOW CONTROL > None
TERMINAL EMULATION > VT 100 *
(*Not all versions of MS Windows prompt for this parameter)
Select “Apply” and “OK” as prompted. The HyperTerminal program will immediately begin communicating
with the Model 3100, and the Model 3100 will commence sending data via ASCII code dump to the PC.
The information from the analyzer will be sent in ASCII strings, at 1-second intervals. Data will be sent in
the factory default “Human Readable” format.
4.1.2.2 Troubleshooting Your HyperTerminal interface
If serial communications with the Model 3100 fails, isolate the problem by performing the following tests:
Disconnect the RS-232 cable from the Model 3100 by removing the terminal block connector from TB3.
Insert a jumper between pins 9 & 10 on the terminal block connector. Enter a few letters from the PC
keyboard. The PC monitor should display the corresponding alpha-characters as they are typed. If the
letters do not display on the monitor screen, there is a problem with the RS-232 cable, the PC serial COM
port, or the HyperTerminal setup.
If the typed letters DO show on the monitor screen and serial communications with the Model 3100 still
has not been established, then PC COM port pins 2 & 3 (3100 pins 9 & 10) may be reversed. Verify the
cable wiring (section 2.1.3.10). If no transmitted data from the Model 3100 is seen on the monitor screen,
call the Neutronics Service Department for further assistance.
4.1.2.3 RS-232 serial data access
There are three levels of access through the service port that can be used for interfacing with the Model
3100:
1) Standard Access: ASCII dump to a PC, printer, or DAQ -- provides basic operator access
2) Advanced Level-1 Access: Allows user setup and configuration -- such as alarms and data format
3) Advanced Level-2 Access: Allows access to vital control areas via password
4.1.2.4 Standard level access
Standard Level Access is the default level of access to the Model 3100 available to the user via a host
computer or printer over a standard RS-232 serial interface. In Standard Level access, the user can
make inquiries about oxygen concentration, sensor signal level, and other parameters for system
servicing and troubleshooting.
When communications are established between the Model 3100 and a host computer, 2-way
communication begins automatically in Standard Level access. Data is sent out through the analyzer RS-
232 Service Port to the host terminal once-per-second, in the factory-default Human Readable format
(see section 4.1.2.4.2). There are no commands necessary to begin viewing information transmitted by
the Model 3100 in Standard Level access.
To request and view specific information via the RS-232 interface, type the desired command key
selected from the Standard Access level command chart below (see Figure 26). It is not necessary to
press “Enter.”
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