Conversion Rate; Scan Cycle With Output - Ahlborn ALMEMO 710 Operating Instructions Manual

If the user touches on the button ´Save-to-memory cycle´ and then selects
´greater than 1s´ or ´less than 1s´ this is usually equivalent to choosing be-
tween the output cycle and the scan cycle.
Or, instead of the scan cycle, the user can enter the desired scans per second
directly. The scan cycle and the associated conversion rate are then calculated
automatically. In straightforward cases the user can simply accept this setting
´as is´ by means of ´Apply´; in special cases it is better to check by means of
´Display / edit details´. These settings ´Data logger 1/4´ can also be accessed
directly on the data logger via the option ´Settings´ in the bottom line.

10.1.1 Conversion rate

All active standard sensors (analog, DIGI, D6) are scanned continuously one
after the other at the conversion rate of the A/D converter. This conversion
rate can be 2.5 / 10 / 50 / 100 measuring operations per second (mops) (see
Manual XREF); the desired rate can be set via the option ´Settings´ in the bot-
tom line and the selection box ´Conversion rate´. The scan time for all stan-
dard sensors currently connected is continuously calculated and displayed.

The rate is set by default to 10 mops. It should be noted, however,
when selecting the conversion rate, that the higher the rate so the
lower the measuring quality and, conversely, the lower the rate, the
higher the quality.
The physical response speed of the sensors must also be consid-
ered; ignoring this may produce a lot of irrelevant junk data.
At conversion rates above 10 mops mains hum suppression is not
possible; as a result accuracy may be adversely affected by interfer-
ence over the connection lines; (wherever possible use twisted
wires).

10.1.2 Scan cycle with output

With the new intelligent D7 sensors the minimum actual measuring duration is
stored in the sensor plug itself; depending on the sensor this may be from 1
millisecond up to several minutes; it is listed in the sensor overview. To scan
all the measuring channels of standard or D7 sensors a new scan cycle has
been introduced; this scans only those measured values that have been up-
Measured value acquisition / output
ALMEMO ® 710 27