Delphin Expert Logger Manual page 61

Expert Logger
Enter the IP address of one or more available NTP time servers to enable
correct time settings for the device. The NTP time server can be any other
network device such as a PC or other device. You can also specify several
NTP servers and the device will choose the best time source automatically.
The integrated Windows time server SNTP (Simple Network Time Protocol)
is however not recommended due to it having insufficient information on
synchronisation status. The device accepts NTP server times but only
when this is synchronised to an Internet time server or to DCF77 or GPS
and is able to provide information on the quality of synchronisation.
A suitable NTP server is located in the NTP subfolder on the installation CD.
NTP synchronisation requires up to five minutes to adjust to the NTP
time server after the device has been switched on. The NTP status
will be invalid during this period and will display the message 'Syn-
chronised to unspecified at stratum 13'.
Using GPS clock
Depending on the device, there are different ways for GPS-based syn-
chronisation. You can activate GPS synchronisation in addition to NTP syn-
chronisation and the device will choose the best time source automatically.
To connect a GPS source to COM3, such as Holux GR-213, select the
antenna COM3
Interfaces→ COM3 RS-232
enable reception.
Some devices have an integrated GPS receiver and only one antenna is
required to receive the signal. Connect the antenna supplied to the GPS
connection of the device and activate here
Once the GPS receiver receives a valid satellite signal, after a short time
NTP status will display
Use Data Service/Local Clock .
You can also enable direct synchronisation with a connected DataService
without using a NTP server. Thus, the current time of the device's con-
nected PC is used as a reference and the device begins to set itself to this
time. This process may take more than an hour. Select the
setting. Only use this setting when no NTP server is available on your net-
work. The time will be as accurate as that of the PC connected to the
device.
Also synchronise large time differences
This setting enables NTP server time setting, even where there is a large
deviation between the current device time and the NTP time. This option is
Expert Logger Manual
Januar 2018
setting. The corresponding channel (
) must be switched off (disable
'Synchronized to UHF radio at stratum 1'
61
Device→
Active
GPS antenna WWAN
DataService
Delphin Technology AG
GPS
) to
.
.