Vaisala CARBOCAP GMP231, Руководство пользователя, Страница: 83 / 92

8. Troubleshooting
8.1 Problem situations
Table 70 Possible problem situations and their remedies
Problem Possible cause Remedy
Analog output reading is
unchanging and appears
incorrect. Analog output is in error
state. Remove the cause of the error state
and the analog output recovers its
normal function.
Probe outputs stars "****" on
serial line instead of
measurement data. Incorrect supply voltage. Check the power supply. Check the
active errors using the
ERRS
command on the serial line.
Unsuitable operating
environment. Verify that the operating
environment is within specified
operating limits.
Unable to access probe on
RS-485 line. Incorrect wiring. Check that the RS-485 connection is
wired correctly.
Power cycle or reset the probe and
try again.
Probe in POLL mode with
unknown address. Issue the ?? command to make the
probe output its information. Then
use the
OPEN command to open a
line to the probe’s address.
CO
2
measurement not
working.
Condensation on the sensor. Remove the PTFE filter and check if
condensation has formed on the
sensor. If yes, dry out the
condensation with instrument air
and insert a new dry filter. Keep the
probe powered and operating to
prevent re-occurrence.
More information
‣
Wiring (page 22)
‣
Analog output error state (page 81)
8.2 Analog output error state
GMP231 sets the analog output channel into a defined error level instead of the measured
result in 2 situations:
Chapter 8 – Troubleshooting
81