User`s guide

Chapter 5 ___________________________________________________________ Troubleshooting
VAISALA______________________________________________________________________ 169
- Pay also attention to the message related to the excitation
voltages. If the damaged sensor is powered by the logger,
it may cause an overload.
c. If the malfunctioning sensor is measured by the logger:
- Open the sensor calibration view in MAWS Terminal,
see section Determining Sensor Status on page 177.
- Check the sensor status and compare the value against the
sensor status list in Table 27 on page 180.
d. If the malfunctioning sensor is a so called intelligent sensor,
for example, Vaisala Ceilometer or Vaisala Present Weather
Detector, use it's own diagnostic features.
- Connect terminal cable and start MAWS Terminal.
- Service interface for the intelligent sensors can be
accessed through MAWS as explained in section
Opening Service Connection Through MAWS on page
174.
6. Communication is not working properly.
a. Whenever possible use an external device to verify that the
communication infrastructure is working properly. For
example, use a cellular phone to verify that the signal strength
in the site is sufficient or that the SIM card in the MAWS
system has the access to the network.
b. Troubleshoot the modems as instructed in section GSM
Modems.
c. If the communication device supports ASCII commands, such
as for example AT commands for modem, this command
interface can be accessed as explained in section Opening
Service Connection Through MAWS on page 174.
7. Data is not stored to a memory card.
a. Check the status of the memory card. It is indicated by a LED.
Table 28 on page 181 describes the different blinking
sequences and the card conditions they indicate.
b. Check that the memory card has been formatted with a
command EXTFS ERASE before use. For more information,
refer to section Using External Memory Card on page 181.