User manual

Series 3700 System Switch/Multimeter Reference Manual Section 7: Buffer: Data Storage and Retrieval
3700S-901-01 Rev. C / July 2008 7-15
Recall attribute
Description
channels
An array (a Lua table) of strings indicating the channel or channel
pattern associated with the measurement.
The returned value provides different information, based on what was
opened or closed when the reading was acquired:
If no channel or channel pattern is closed when the reading was
acquired, "None" is displayed.
If only a single channel or backplane relay was closed, the
channel number is displayed (for example, 5003 or 5915).
If a channel or backplane relay plus another backplane relay or
other channel is closed, then the channel number will be displayed
followed by a + sign (for example, 3005+ or 3915+). The channel
will be in the image unless the last close operation involved only
backplane relays.
If multiple channels and/or backplane relays were closed in a
channel list, the last channel specified will be stored. Channels
take precedence over backplane relays when stored. However, if
only multiple backplane relays are specified, then the first one will
be stored.
If a channel pattern was closed, then the first eight characters of
the channel pattern name are returned (for example,
mypattern1 is shown as mypatter).
dates
An array (a Lua table) of strings, indicating the date of the reading
formatted in month, day, and year.
formattedreadings
An array (a Lua table) of strings indicating the formatted reading as
viewed on the display.
ptpseconds
An array (a Lua table) of the seconds portion of the time stamp of
when the reading was stored. These seconds are absolute and in
PTP format.
readings
An array (a Lua table) of the readings stored in the reading buffer.
This array holds the same data that is returned when the reading
buffer is accessed directly, that is, rb[2] and rb.readings[2]
are the same value.
relativetimestamps
An array (a Lua table) of time stamps, in seconds, of when each
reading occurred relative to the time stamp of reading buffer entry
number 1. These are equal to the time that has lapsed for each
reading since the first reading was stored in the buffer. Therefore, the
relative time stamp for entry number 1 in the buffer will equal 0.
statuses
An array (a Lua table) of status values for all readings in the buffer.
The status values are floating-point numbers that encode the status
value into a floating-point value (see the table in Buffer status (on
page 7-16)).
times
An array (a Lua table) of strings, indicating the time of the reading
formatted in hours, minutes, and seconds.