Troubleshooting; Solving Typical Problems; Table 5 Troubleshooting Table, Transmitters With Analog Output - Vaisala CARBOCAP GMW80 Series User Manual

6. Troubleshooting
6.1 Solving typical problems
If you experience problems with GMW80 series transmitters, first see the following tables (for
analog output and Modbus models) concerning the behavior and error indications of the
transmitter. If you cannot locate the source of the error and return the transmitter to
operational state, contact Vaisala. See
Table 5 Troubleshooting table, transmitters with analog output
Problem or message
Analog output reading is
unchanging and appears
incorrect.
Temperature reading is too
high.
CO reading is too high.
2
Technical support (page
Possible cause
Transmitter has set the analog
output to the error level (3.6
mA or 11 V) because the
transmitter is in the error state.
Transmitter is installed in an
unsuitable location, for
example, near a heat source or
in sunlight.
Transmitter is installed in
improper orientation.
Unsuitable operating
environment.
Source of CO near the
2
transmitter.
CO measurement module
2
must be replaced.
Chapter 6 – Troubleshooting
55).
Solution
Determine what has caused the
error state and remove the
cause.
For a description of the error
state and its possible causes,
see Error state (page
Relocate transmitter. See
Selecting location (page
Reinstall transmitter with the
arrow on the mounting base
pointing up.
Verify that the operating
environment is within specified
operating limits.
• Use a portable instrument to
verify the CO reading at the
2
installation location. Avoid
breathing on the instruments
while checking.
• Check for sources of CO
the measured area, such as
people working right next to
the transmitter.
See Replacing the CO 2
measurement module (GM10)
(page 36).
42).
22).
in
2
39