Vaisala HydroMet User's Guide download pdf (Page 154)

User’s Guide ______________________________________________________________________

152 __________________________________________________________________M210785EN-E

Time Receiver

With the Time receiver function, you can set and read the system time

without opening a service connection. Add and connect the Time

receiver to a serial port in the Equipment view of Lizard Setup

Software. You can then set and read the system time through the serial

port using the command strings described below.

Setting System Time

To set the system time, give the following command:

<checksum>@

The system responds to the TIME command with ACK when the

command is executed successfully or NAK when the command fails. The

response is optional and you can disable it in the Measurements view

of Lizard.

The checksum is the 2-character 8-bit XOR calculated from the

characters between <STX> and <ETX>.

You should also enter the Time tolerance in Lizard. When the

difference between the system time and the new time setting is smaller

than the given Time tolerance, the system time is not adjusted but the

system responds with ACK.

Reading System Time

To read the system time, give the following command:

TIME <CR>

The response string is as follows:

?<STX>YYYY-MM-DD HH:MM:SS<ETX><checksum>@

The checksum is calculated as described above.

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Vaisala HydroMet User's Guide Page 154