SVMtec PSC Series User manual

PSC8 / 16 / 24 Version 1.4
Date 29/08/2017
Editor Detlef Bergmann
PSC – Multichannel Pressure Scanner
1 General
Figure 1:PSC8
The PS -series pressure scanners are designed for simultaneous measurements of multiple
pressure signals.
The PS 8-USB offers the ability to connect up to eight differential pressure probes, where
each pressure port has its own reference port.
The PS 16/24-USB features 16/24 pressure channels with a common reference port. A special
differential version with reference ports for each line is also available.
Different measuring ranges are available, noting that all channels are equipped with the same
kind of sensor.
Acquired data is internally scaled to the unit Pascal [Pa] and transmitted as plain AS II text.
The acquisition rate can be adjusted within the range of 1 to 50 [Hz], using an intuitive
communication protocol.
The tare function is activated either by pushing the TARE-button on the front panel or via a
software command.
Optionally, the 8 channel device is available with built-in magnetic valves, allowing automatic
zero compensation measurements while pressures remain connected.
PS -USB and - AN devices are powered via USB respectively AN port. To operate the
magnetic valves and PS -LAN devices an external power supply has to be connected to the
back panel.
PS -USB and - AN devices are both equipped with a USB interface, allowing it to be easily
configured. In this case the scanners identify themselves as a virtual OM-port to the host P .
Thus, any software which supports the standard RS-232 protocol can be used for
communication. The LAN-version sends the data using the T P-IP protocol. A direct connection
can be set up via Telnet (Port 10001). The application putty.exe can be used when working with
Windows. With LabVIEW (National Instruments), the use of the VISA-class is recommended
due to the possibility to access both USB- and LAN-devices. An exemplary software for the use
with National Instruments LabVIEW is provided.
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Figure 2: PSC24

PSC8 / 16 / 24 Version 1.4
Date 29/08/2017
Editor Detlef Bergmann
PSC – Multichannel Pressure Scanner
2 Front panel
Figure 3: PSC8 Front panel
Functional components at the front panel:
Hose
Connectors
PS 8: 8 hannels, each with its own connector for total and reference
pressure
PS 24: 24 onnectors for total pressures
1 onnector for combined reference pressure
Table 1: Functional components at the front panel
are - function
The TARE-button is protected against accidental use. To trigger a zero compensation measure -
ment the button has to be pressed at least 2 seconds until the LED turns off.
3 Back panel
USB ommunication with host P (only PS xx-USB and - AN)
LAN ommunication with host P via network (only PS xx-LAN)
CAN ommunication with host P via AN bus (only PS xx- AN)
5,5 mm
DC-connector
External power supply (only PS 8-USB-MV and PS xx-LAN)
ARE
button
Manual triggering of zero compensation
rigger (optional) BN - onnector for external triggering of the data acquisition
Table 2: Pin assignment PSC
Power supply
PS -USB and - AN devices are powered via USB respectively AN port. To operate the
magnetic valves and PS -LAN devices an external power supply (7-24 Volts, 1 Ampere) has to
be connected to the back panel.
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Figure 4: PSC24 Front panel

PSC8 / 16 / 24 Version 1.4
Date 29/08/2017
Editor Detlef Bergmann
PSC – Multichannel Pressure Scanner
4 PC communication
After connecting the PS device's USB port to the host P and installing the driver it is
identified as a virtual OM-port. Thus any software which supports the standard RS-232
protocol can be used.
If unknown, the appropriate OM-port can be identified using the Windows Device Manager.
To configure the LAN-version the PS -IPtool is included in the delivery. With this application
the PS x-LAN devices can be found in the network and their IP addresses can be changed.
4.1 Installation of device drivers
Serial port drivers are supplied with the PS pressure scanner. These drivers are installed
automatically when installing the PS demo application shipped with the hardware.
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Figure 5: IPtool for configuration in the net ork

PSC8 / 16 / 24 Version 1.4
Date 29/08/2017
Editor Detlef Bergmann
PSC – Multichannel Pressure Scanner
4.2 Description of the serial protocol
The available commands for configuring and using the pressure scanner are listed and
described in the following table.
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Command Function Answer
CAL a x Set scaling factor for senor a to a
value of x #Scaler=.... Offset=....
CAL? a Read the scaling factor of sensor a#Scaler=.... Offset=....
EE_LOAD Load calibration data from EEPROM #EEPROM:loaded
EE_SAVE Save calibration data to EEPROM #EEPROM:saved
*IDN? Read device ID TYPE PSC8-USB VERSION 1.0 SERNUM
#SN31xxxxx
RATE x Define sample rate
Range x = 10...5000 [ms]
Default: 1000[ms] ~> 1[Hz]
#Rate=x ms
#Error: Rate Range
RATE 0 Activate Request-Mode
Actual values are read only after
manual command „?“ is sent
#Request Mode active
?Read current values (only Request
Mode)
*RST Load Default Settings #RESET
SCAN_A x
SCAN_B x
SCAN_C x
Defines a scanlist (channel selection)
Binary, every bit representing a channel
Example in tables 4 and 5
TARA Zero compensation measurement #TARA
FILTER Activate exponential filter
0 = deactivated; >0 = filter range in ms #FILTER=x
MUX x Input multiplexer channel (only available
in MUX-versions)
MUX0 deactivates all inputs
#MUX x
MUX? Read current MUX setting #MUX x
- for CAN bus version only -
CAN_ID x set AN-ID #OK
CAN_IT x set interface
x = 0: normal (11bit, AN 2.0A)
x = 1 extended 23bit (23bit, AN 2.0B)
#OK
CAN? reqest AN configuration #ID:0x[...]_Speed:[baud]_IDT:[0,1]
CAN_SPEED x set AN bus rate
0: 125 kBaud
1: 250 kBaud
2: 500 kBaud
3: 1 MBaud
#OK
Table 3: Available commands

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).
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Channel
(Scan_A)
1
(1)
2
(2)
3
(4)
4
(8)
5
(16)
6
(32)
7
(64)
8
(128)
x
example a) 1 (ON) 0 (OFF) 0 (OFF) 0 (OFF) 0 (OFF) 0 (OFF) 0 (OFF) 0 (OFF) 1
example b) 1 (ON) 1 (ON) 1 (ON) 0 (OFF) 0 (OFF) 0 (OFF) 0 (OFF) 0 (OFF) 7
example c) 1 (ON) 1 (ON) 1 (ON) 0 (OFF) 0 (OFF) 0 (OFF) 0 (OFF) 1 (ON) 135
example d) 1 (ON) 1 (ON) 1 (ON) 1 (ON) 1 (ON) 1 (ON) 1 (ON) 1 (ON) 255
Table 4: Exemplary: Calculation of the Scanlist-constant x
Channel
(Scan_B)
9
(1)
10
(2)
11
(4)
12
(8)
13
(16)
14
(32)
15
(64)
16
(128)
x
example a) 1 (ON) 1 (ON) 0 (OFF) 0 (OFF) 0 (OFF) 0 (OFF) 0 (OFF) 0 (OFF) 3
example b) 0 (OFF) 0 (OFF) 0 (OFF) 0 (OFF) 0 (OFF) 0 (OFF) 0 (OFF) 1 (ON) 128
example c) 1 (ON) 1 (ON) 0 (OFF) 0 (OFF) 1 (ON) 1 (ON) 0 (OFF) 1 (ON) 179
example d) 0 (OFF) 0 (OFF) 1 (ON) 1 (ON) 1 (ON) 1 (ON) 1 (ON) 1 (ON) 252
Table 5: Exemplary: Calculation of the Scanlist-constant x

PSC8 / 16 / 24 Version 1.4
Date 29/08/2017
Editor Detlef Bergmann
PSC – Multichannel Pressure Scanner
Each rising edge of the trigger signal starts a data acquisition and sends the data to the host.
4.4 CAN Bus (optional)
Pin assignment AN bus (M8-connector):
Pin Function Cable colour
1 + Supply brown
2 AN low white
3 - Supply (GND) blue
4 AN high black
Table 6: Pin assignment CAN-Bus
As long as PSC-CAN devices are connected to the USB port for conguration the CAN
bus interface is automatically deactivated.
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PSC8 / 16 / 24 Version 1.4
Date 29/08/2017
Editor Detlef Bergmann
PSC – Multichannel Pressure Scanner
5 Specifications
5.1 echnical Data
Serial Communication
Baud Rate 115200 Baud/s
Data bits 8
Parity none
Stop-Bits 1
elnet (LAN-Variante)
Telnet-Port 10001
rigger
Voltage range 2,5 – 24V (<1mA)
Power Supply
Input voltage Via USB (PS -USB), via AN (PS - AN)
Input voltage PS -MV, PS -LAN 7-24V, 1A
Accuracy and Sample Rate
Range (depends on selected sensors) +/-0,025 ... 500 kPa
Accuracy Min. +/- 0,25% FSS (+/-0,1% FSS on request)
Sample rate per channel PS 8: 1 - 100 Hz
PS 16/24: 1 - 50 Hz
Dimensions
Housing 130 x 55 x 170 mm (W x H x D)
Pressure onnector D=2,0mm
Recommended hoses Soft-PE- or Silicone hoses 3,5x1,5mm
Environmental Conditions
Temperature 5 ... 50 °
Humidity 0 ... 95 %, non condensing
Operating medium Air and other noncorrosive gases
Table 7: Technical Data
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PSC8 / 16 / 24 Version 1.4
Date 29/08/2017
Editor Detlef Bergmann
PSC – Multichannel Pressure Scanner
6 echnical Drawing
Dimensions for a PS 24 device can be taken from the following drawing. PS 8 and
PS 16 devices are identically dimensioned.
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Figure 6: Technical dra ing and dimensions for a PSC24 pressure scanner

PSC8 / 16 / 24 Version 1.4
Date 29/08/2017
Editor Detlef Bergmann
PSC – Multichannel Pressure Scanner
EG Konformitätserklärung
EU Declaration of Conformity
Name des Herstellers: SVMtec GmbH
Name of Manufacturer: Ingenieurbüro für Strömungsmechanik, Versuchs- und
Messtechnik
Anschrift des Herstellers: Bergnelkenstr. 7
Adress of Manufacturer: 70563 Stuttgart (Germany)
Für das folgende Produkt wird hiermit bestätigt, dass es den Schutzanforderungen entspricht,
die in den Richtlinien des Rates zur Angleichung der Rechtsvorschriften der Mitgliedstaaten
bezüglich elektromagnetischer Verträglichkeit (2004/108/EG) festgelegt sind:
It is hereby confirmed in respect of the follo ing designated product that it comply ith protec-
tion requirements specified in the Directive of the Council for Harmonization of the Statutory
Provisions of the Member States for Electromagnetic Compatibility (2004/108/EG):
Bezeichnung / name: SVM / Mehrkanaldruckscanner der PS -Serie
SN 31001 - 31999
Zur Beurteilung des Produkts wurden folgende harmonisierte Normen herangezogen:
Reference as made to the follo ing harmonised standards:
EN 61326-1:2006 Elektrische Mess-, Steuer-, Regel- und Laborgeräte
EMV-Anforderungen - Teil 1: Allgemeine Anforderungen
Stuttgart, den 01.12.2014
Dr.-Ing. Detlef Bergmann (Geschäftsführer)
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