Vaisala HMT140 User Manual page 54

HMT140 User Guide
3. Use the Test Connect Time tool in the utility to verify how long the HMT140 takes to
connect to the network.
If the network consistently takes longer than five seconds to connect to the network, you
may need to make adjustments to the settings. Set the connect time window to a longer
value (use the Test Connect Time tool to help determine this value) or change a
connection component like channel Auto Find or DHCP.
Extending the connect time may decrease battery life. The battery meter
cannot be used to verify battery life remaining if connect times are set longer
than the default.
4. Verify the signal strength where the HMT140 is located. Also check how the HMT140 is
mounted and oriented at this location with respect to the access point. For example, the
HMT140 is mounted at the back of a refrigerator but may work better being mounted near
the top of the refrigerator.
5. Change batteries.
HMT140 Utility cannot find the HMT140
1. Make sure the HMT140 Configuration Cable is connected to the HMT140.
2. Disconnect the cable, power the HMT140 off, power back on, wait five seconds, connect
the cable and try again.
3. If the red LED in the programming cable flashes when doing an operation, disconnect the
cable from the HMT140 and connect again.
4. Disconnect the cable from the HMT140 and then disconnect the cable from the PC. Wait
30 seconds. Insert cable back into PC and into the HMT140.
5. Reboot your computer.
6. Use an externally powered USB Hub. Your computer may not be supplying enough power
through the USB port.
HMT140 Utility network compatibility issue: Data is not reaching
destination in Transmitter mode
While in Config mode, the HMT140 can connect (associate/authenticate) to the network and
Contact Destination is successful but while in Transmitter mode, the data never reaches the
destination. The UDP data packet from the HMT140 is not forwarded by the router.
Workaround:
1. Use Dynamic IP and have DCHP Caching turned off. If the IP address is static or the DHCP
Caching is enabled, these routers will not forward the UDP data packet of the HMT140.
2. Replace the router (contact Vaisala Technical Support).
Why does the battery meter indicate a lower battery life than
expected?
1. Confirm whether the battery meter was reset when the batteries were last changed. (See
Battery Usage (page
52
36).)
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