TSI Instruments SIZER 3321 - Input Guidelines; Troubleshooting Input; Troubleshooting Serial Commands

C-28 Model 3321 Aerodynamic Particle Sizer

Spectrometer
Troubleshooting Input
Use Table C-4 as a troubleshooting guide.
Table C-4
Troubleshooting Serial Commands
Symptom
Possible Problem
Refer to
"Error" message
after pressing
<Enter>
An invalid command; command does not
exist.
An invalid parameter, which includes too
many parameters or a parameter that is out-
of-range.
Incorrect syntax
Figure C-2 in this section.
The command showing the range and
an example.
"Input Guidelines" in this section.
No response after
pressing <Enter>
In unpolled mode
Use the U0 command to disable
unpolled mode. Enter U1 if an "OK" is
returned.
Serial cable
Check the cable and the cable
connection. See Chapter 2, "Unpacking
and System Setup."
Incorrect COM port
Check the COM port specified in the
software.
Incorrect baud rate
Software must be set at 9600, 19200, or
38400 baud to match instrument setting.
Also check computer hardware.
RS232 chip on the Model 3321
Contact TSI. Refer to "Contacting
Customer Service."
Model 3321 is locked up
Remove power from the Model 3321,
then apply power to the instrument. If
the problem continues, contact TSI.