5. DATA ACQUISITION
The instrument ALMEMO
®
8990-8 provides the following options for the
acquisition of measuring data:
1. Continuous measurement of a selectable measuring point, see manual 6.4
Possibly, an output of measuring data to an analogue output, see man. 5.1.1
2. Single measuring point scan, see manual 6.5.1.1.
3. Cyclic measuring point scan, see manual 6.5.1.2.
4. Continuous measuring point scan, see manual 6.5.1.3.
Previous measuring data should be cleared before a measurement.
A
total clearing of all measured values
, i.e. the clearing of max, min and
average values of all channels, as well as the clearing of the memory is
performed by pressing the keys STOP and OUTPUT. For automatic clearing
during start, see manual 6.10.13.2.
The programming of the process control
is performed via serial interface
and by using the configuration software AMR-Control or a terminal (PC) (see
manual section 6). If during programming a programming connector (ZA
8990-PS) is connected to the socket A2 all parameters will be transmitted to
the connector. If such a connector is also connected to socket A2 during
switch-on, the data will be reloaded and the instrument will be programmed
correspondingly. By using several connectors the configuration can be easily
changed. If a programming via interface is not required the connectors can be
ordered factory-programmed to customer specifications.
5.1 Single Measuring Point Scan
If no measuring point scan has been set, only the measured value of the
selected measuring point, beginning with measuring point 0, will be
continuously acquired with the selected conversion rate (see manual 6.5.4).
This is the best possible operating mode for a data logging with analogue
output.
Measuring point scans can be used to acquire, indicate and document data
from the selected measuring point and also from other measuring points. As
long as no print cycle and no measuring cycle are programmed (e.g. after a
reinitialisation, see 3.5) only single measuring point scans are triggered by
using the key START. The control lamp ´CYCLE´ is only illuminated during the
data query and will then turn off. If the time was cleared, it will be restarted, a
measuring point scan of all connected active sensors will be performed and the
measured values will, for one time, be provided as output to a connected
printer. If the memory is activated (see manual 6.5.3) the control lamp
´MEMORY´ will be on during the data query. With each press of the key the
measured values are equally processed with the corresponding measuring
time. If true time has to be indicated, it must first be set (see manual 6.2.8).
14
ALMEMO
®
8990-8
Data Acquisition
