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Troubleshooting and Service
12.5.10.2. TROUBLESHOOTING ANALYZER/MODEM OR TERMINAL OPERATION
12.5.11. THE OPTIONAL CO
288
These are the general steps for troubleshooting problems with a modem connected to a
Teledyne API analyzer.
1. Check cables for proper connection to the modem, terminal or computer.
2. Check to make sure the DTE-DCE is in the correct position as described in Section
6.1.
3. Check to make sure the set up command is correct. See Section 8.3.
4. Verify that the Ready to Send (RTS) signal is at logic high. The T300/T300M sets
pin 7 (RTS) to greater than 3 volts to enable modem transmission.
5. Make sure the BAUD rate, word length, and stop bit settings between modem and
analyzer match. See Section 8.3.
6. Use the RS-232 test function to send "w" characters to the modem, terminal or
computer. See Section 8.3.
7. Get your terminal, modem or computer to transmit data to the analyzer (holding
down the space bar is one way); the green LED should flicker as the instrument is
receiving data.
8. Make sure that the communications software or terminal emulation software is
functioning properly.
Further help with serial communications is available in a separate manual "RS-232
Programming Notes" Teledyne API P/N 013500000.
SENSOR
2
There are Two LEDs located on the CO
Serial I/O
(Not Used)
Figure 12-13: Location of Diagnostic LEDs onCO
•
Normal Operation: V8 is not lit – V9 is Blinking
•
Error State: Both LEDs are blinking.
Check to make sure that the cable to the CO
Teledyne API – Model T300/T300M CO Analyzer
sensor PCA.
2
LED V8
LED V9
(Red)
(Green)
CPU
OVDC 5VDC
Analog
Output
probe is properly connected.
2
To CO
2
Probe
Sensor PCA
2
06864B DCN6314
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Table of Contents
Troubleshooting
