Chapter 6 Troubleshooting; Problem Situations - Vaisala CARBOCAP GMW90 Series User Manual

Chapter 6 ____________________________________________________________ Troubleshooting
CHAPTER 6
TROUBLESHOOTING

Problem Situations

VAISALA ________________________________________________________________________ 73
This chapter describes possible problems, their probable causes and
remedies, and provides contact information for technical support.
Table 12 Troubleshooting Table
Problem
Transmitter reports an
error on the display or
serial line.
Temperature reading
shown by the transmitter
is too high.
Transmitter does not
recognize a valid serial
command, responds with
message
FAIL 1: Unknown
command
Cannot see what you are
typing on the serial line.
Unable to complete CO
adjustment successfully.
Possible Cause
Multiple causes.
Transmitter is installed in
an unsuitable location,
for example, near a heat
source or in sunlight.
Transmitter installed in
improper orientation.
Advanced commands
not enabled.
Remote echo enabled on
the transmitter, causing
collisions on the RS-485
line.
Intermittent connection
problem between the
transmitter and your
terminal.
Serial line echo not
enabled.
Incorrect reference gas
2
flow.
Breathing on transmitter
while using ambient gas
as reference.
Measurement not
stabilized before
attempting adjustment.
Incorrect calibration gas
concentration(s) used for
2-point calibration.
Remedy
Refer to Table 13 on
page 74.
Relocate transmitter.
See section Selecting
Location on page 24.
Reinstall transmitter with
the arrow on the
mounting base pointing
up.
Issue the PASS 9000
command.
Issue the ECHO OFF
command to disable
remote echo.
Issue the command
again.
Enable local echo on
your terminal. See
section Terminal
Application Settings on
page 35.
Retry calibration after
reading section
Calibration and
Adjustment on page 63.