Repair Procedures - Teledyne 300E Instruction Manual

TROUBLESHOOTING & REPAIR PROCEDURES
11.5.9.2. Troubleshooting Analyzer/Modem or Terminal
These are the general steps for troubleshooting problems with a modem connected
to a T-API analyzer.
Check Cables for proper connection to the modem, terminal or computer.
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Check to make sure the DTE-DCE is in the correct position as described in
§
Section 7.7.2.
Check to make sure the Set up command is correct (See Section 7.7.10)
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Verify that the Ready to Send (RTS) signal is at logic high. The M300E sets
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pin 7 (RTS) to greater than 3 volts to enable modem transmission.
Make sure the BAUD rate, word length, and stop bit settings between modem
§
and analyzer match, see Section 7.7.
Use the RS-232 test function to send "w" characters to the modem, terminal
§
or computer; See Section 7.7.7.
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.
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" T-API part number 013500000.

11.6. Repair Procedures

This section contains procedures that might need to be performed on rare occasions
when a major component of the analyzer requires repair or replacement.
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Operation
Model 300E Carbon Monoxide Analyzer
Instruction Manual
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