PSC8 / 16 / 24 Version 1.4
Date 29/08/2017
Editor Detlef Bergmann
PSC – Multichannel Pressure Scanner
Any command must be terminated (either R or LF or R+LF). onsecutive sensor numbering
starts with number '1' for the first channel.
The 'calibration' and 'scanlist' values can be changed during run-time. They remain valid as
long as the scanner is connected to a proper power supply (USB or external).
Only after command EE_SAVE has been sent, the values are stored permanently and can be
restored after turning off the power supply.
If not all channels are needed in a measurement, a scanlist can be defined to activate
dedicated channels. 8 channels are grouped together in one list respectively. A PS 24 scanner
therefore uses three separate lists (SCAN_A, SCAN_B as well as SCAN_C), while PS 8
devices are only evaluating the first one (SCAN_A).
The binary listing of the channels must be converted into a decimal unsigned 8-bit integer
number („x“) and can then be transmitted to the scanner via SCAN_n x command.
Using the command *RST automatically reactivates all channels.
Some possible configurations of the first two scanlists are presented in tables 4 and 5 as an
example.
Caution: By default, all channels are activated and transmitted in ascending order. While using
the scanlist, deactivated channels are skipped to reduce overall data volume.
If, for example, channels 10, 22, 23 and 24 are in use, they ill be sorted in ascending order
and transmitted at places 1, 2, 3 and 4.
4.3 rigger-mode (optional)
For synchronisation with other devices, an external trigger signal can be connected to the BN -
plug on the backpanel of the PS .
The external trigger function is activated be setting the scanrate to „0“ (e.g. by sending RATE 0).
