USB-AD
Page 8
5
Important Notes for Using the USB-AD
•
The device is only suitable for extra-low voltages - please observe the relevant regulations! Only use the device
with housing closed. ESD voltages at open lines may cause malfunction.
•
Only use non-solvent detergents for cleaning. The product is designed to be maintenance-free.
•
Signal cables are connected at the 37-pin D-Sub female connector – preferably use shielded cables. For best
possible interference suppression, connect shield at one end only. Close open inputs if necessary.
•
The device ground and the chassis are electrically connected to the chassis of the PC, which is usually also
connected to ground. Be sure to avoid ground loops since they will cause measuring errors!
•
PCs (notebooks) which are not grounded often produce high potentials to earth at the USB socket so that safe
operation cannot be guaranteed. In this case, connect the measuring system to earth.
•
The gain is adjusted to even values. Therefore, only 4000 values (for 12 bit) of the full range of the converter are
used. As a result, the measuring ranges are slightly larger (e.g.
±
5.12V) than the indicated measuring ranges so
that overranges can be recognized. The AD converter of the USB-AD has a code noise of up to
±
1 LSB
•
The device must not be used for safety-relevant tasks. With the use of the product, the customer becomes
manufacturer by law and is therefore fully responsible for the proper installation and use of the product. In the case
of improper use and/or unauthorized interference, our warranty ceases and any warranty claim is excluded.
Do not dispose of the product in the domestic waste or at any waste collection places. It has to be either duly
disposed according to the WEEE directive or can be returned to bmcm at your own expense.
6
Technical Data
(typical at 20°C, after 5min., +5V supply)
•
Analog Inputs
Channels // Resolution:
16 single-ended // 12 bit (2.5mV)
Sampling rate // Abs. accuracy:
up to 500 values/second can be sampled (depending on software and PC) //
±
5mV
Measuring range // Noise:
±
5V //
±
1 LSB
Surge protection:
max.
±
12V (when turned on),
±
7V (when turned off), max.
±
20mA in total of all input channels!
Input resistance // Input capacity:
1M
Ω
(with PC turned off: 1k
Ω
) // 5pF
Zero shift // Gain drop:
±
50ppm/
°
C //
±
50ppm/
°
C
Frequency accuracy // Frequency drift:
max.
±
50ppm // max.
±
50ppm/
°
C
The values for accuracy always relate to the respective measuring range. Errors might add at worst.
•
Analog Output
Voltage range // Output current:
1 voltage output with
±
5V // 1mA max.
Resolution // Accuracy:
12 bit // typ.
±
4 LSB, max.
±
20 LSB
Zero shift // Gain drop:
±
50ppm/
°
C //
±
50ppm/
°
C
•
Digital Inputs/Outputs
Channels // Level:
4 input and 4 output channels // CMOS/TTL compatible (low: 0V..0.7V; high: 3V..5V)
Input resistance:
min. 1M
Ω
(with PC turned off: 1k
Ω
)
Current pick-up per output pin:
1mA (with app. 4V level), max. 2.5mA (with app. 3V level)
Surge protection:
max.
±
5.5V, protected with 1k
Ω
, max. max.
±
20mA in total of all channels!
•
General Data
Power supply:
+4.5V..+5.5V from USB connection to the PC, max. 100mA
USB interface:
USB 2.0 compatible (full speed)
Connections ( digital):
all channels at 37-pin D-Sub female
CE standards:
EN61000-6-1, EN61000-6-3, EN61010-1; for decl.ElektroG // ear registration:
RoHS and WEEE compliant // WEEE Reg.-No. DE75472248
Max. permissible potentials:
60V DC acc. to VDE
, max. 1kV ESD on open lines
Temperature ranges:
-25°C..+70°C
Relative humidity:
0-90% (not condensing)
Dimensions // Protection type:
71 x 45 x 16 mm
3
, USB cable app. 1.1m // IP30
Delivery:
device in plastic housing with USB cable, "Software Collection" CD, description
Available accessories (optional):
demo board ZU-DBD, connecting cables ZUKA37SB, ZUKA37SS,
37-pin D-Sub plug ZU37ST, connector boards ZU37BB/CB/CO
Warranty:
2 years from date of purchase at bmcm, claims for damages resulting from improper use excluded
•
Software
Software on CD (included):
ActiveX Controls LIBADX (hardware independent) for programming on Windows
®
XP/7/8;
LIBAD4 SDK for C/C++ programming on Windows
®
XP/7/8, Mac OS X, Unix (FreeBSD, Linux);
trial version of the measuring software NextView
®
4 to test and operate the hardware
NextView
®
4 (optional):
professional software (versions: Professional, Lite) for the acquisition and analysis of measurement
data on Windows
®
XP/7/8
Manufacturer: BMC Messsysteme GmbH. Subject to change due to technical improvements. Errors and printing errors excepted. Rev. 5.0
11/24/2014
Via Paolo Uccello 4 - 20148 Milano
Tel +39 02 48 009 757 Fax +39 02 48 002 070 [email protected] www.dspmindustria.it
