Yokogawa Value Series FX1000 - Manual (Page 58)

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IM 04L21B01-01EN
Overview of Functions
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App
Index
1.10 Other Functions
Time Related Functions
• Time Correction
The FX internal clock can be changed in the following ways.
Method Description
Key operation Sets the FX internal clock to the specified time.
Event action function (clock synchronization using remote control signals)
Sets the FX internal clock to the nearest hour.
SNTP client function Sets the FX internal clock to the time retrieved from an SNTP
server.
Time Correction Operation
The time correction operation varies depending on whether memory sampling is in
progress.
Status Operation
Memory sampling stopped The FX internal clock is changed immediately.
Memory sampling
The FX internal clock is gradually corrected. While the time is being
gradually adjusted, the date/time in the status display section is
displayed in yellow.
Operation of Gradually Correcting the Internal Clock
If the time deviation between the time of the FX internal clock and the correct time (the
specified time) is within a specified value, the FX clock is adjusted gradually at a rate
of 40 ms per second. Otherwise, the clock is corrected immediately. The maximum
value of time deviation (tm in the figure below) can be selected in the range of 10 s to
5 min. However, if the clock is being adjusted using the event action function (clock
synchronization using remote control signals), only when the difference between the
current time and the nearest “on the hour” hour is less than or equal to the preset
value is the clock gradually adjusted to the hour (see section 1.6).
Time specified using keys or
retrieved from an SNTP server
Range in which the time is gradually
adjusted
Nearest
hour
Time deviation
Time when the remote control
signal is applied
(Time on the FX)
tm tm
Range in which the time is gradually
adjusted
Time on
the FX
Time deviation
tm tm
Example: When changing the time to 12 hours 55 minutes 35 seconds when the
internal clock is 12 hours 55 minutes 32 seconds
The time deviation of 3 seconds is adjusted 40 ms per second. The
internal clock will be synchronized to the specified time 75 seconds later.
• Date Format
You can select from the following ways of displaying the date: 2011/09/28, 09/28/2011,
28/09/2011, and 28.09.2011.
For the setting procedure, see section 2.4.
• Time Zone
Set the time difference between the location where the FX is used and GMT.
For the setting procedure, see section 2.2.