Advanced Options - Vaisala HMT140 User Manual

3. Select the Tools tab. In the Test Connect Time area, click Start. The HMT140 Utility will
repeatedly attempt to connect to the network with one second between connection
attempts. You can then view:
• Number of connection attempts.
• Last connect time.
• Average, minimum and maximum connect times.
• History of connect attempts displayed as a bar graph (each bar graph is the number
of seconds for the attempt).
• Failed connection attempts displayed as a grey bar. Failed connection attempts are
not factored in the statistics.
4. To change the Connect Window time, on the Options menu select Advanced Options,
and then select the desired Connect Window time.
4.6 Advanced Options
These advanced parameters (Options > Advanced Options) are applied each time an Update
function is performed (available in HMT140 Utility version 1.1.4.0 and higher).
CAUTION!
transmission performance and reduce battery life.
• Extended Transmit, Log Periods and HMP Polltime: Adds an additional transmission,
logging and polling time periods on the Sensor tab. These additional periods are meant to
be used for testing, evaluation and demonstration of the HMT140 and, if used regularly,
can have a severe impact on battery life.
• Log Conversations: When this option is selected, the HMT140 Utility will capture the
conversation between the utility and the HMT140 and place it in a file called
OutputLog.txt. To locate the file, go to the Help menu, select Utility Folder Paths, and
then Explore Data.
• DHCP Caching: When this option is selected, the HMT140 will cache its IP address
assigned from the DHCP server until the DHCP lease time has expired or the HMT140 is
power-cycled. If not selected, the HMT140 will request an IP address each time it attempts
to contact the host.
• ARP Caching: When this option is selected, the HMT140 will store and keep a list of
IP/MAC relationships. If not selected, the HMT140 will rebuild the IP/MAC relationships
with every attempt to contact the host.
• DNS Caching: When this option is selected, the HMT140 will cache the IP address that
results from the DNS lookup of the Destination hostname. The HMT140 will keep the
destination IP address until either the DHCP lease time expires or the HMT140 is power-
cycled. If not selected, the HMT140 will request a DNS lookup of the Destination hostname
each time it attempts to contact the host. This setting is not recommended for most
monitoring systems.
• Allow Channels 12 and 13: Enable the use of channels 12 and 13. This option should only
be used in regions in where these channels are not restricted.
Modification of these parameters may negatively impact
Chapter 4 – Set Up and Operation
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