User manual

OPERATION MANUAL
Technical changes reserved
0141 0316-41 21.08.2015
Evaluation electronics for
ceramic pressure sensors - DS-MOD-
DescriptionDescription
Technical Data
Evaluation electronics for pressure sensors
Bridge operating voltage 5 V
Resistance measuring bridge > 5 kΩ
Scaling 7 mV FS
Offset 0 mV
Application temperature range -20...+80 °C
Dimensions 30 x 30 x 89 mm
Connection Screw terminals
CE-conformance 2004/108/EG
EMV-Störaussendung EN 61000-6-3:2011
EMV-Störfestigkeit EN 61000-6-1:2007
Type 4...20 mA
Output signal 4…20 mA, two wire
Power supply 12...30 V DC
Permissible load Ra[Ω]=(Uv[V]-12V) 0.02 A
Type 0...10 V
Output signal 0...10 V, three wire
Power supply 12..30 V DC / approx. 5 mA
Article Art. No.
DS-MOD 0...10 V DS-MOD-10V
DS-MOD 4...20 mA DS-MOD-20MA
Characteristic features
• Transducer electronics with current output
4...20 mA or voltage output 0...10 V
• For ceramic pressure sensor series DS-KE
or other bridge signals
• Adjustment over potentiometer or optional digital method via
Software
• Digital I²C-interface
Areas of application
• Evaluation kit for pressure sensors
• Evaluation and reference design for ASIC-based
instrument amplier
• Signal evaluation of any measuring bridge
Features
Piezoresistive pressure sensors deliver a differential bridge voltage with
approx. 1 - 4 mV/V FS. To convert this relatively low sensor voltage into
a standard-signal of 0...10 V or 4...20 mA, a high amplication stable
electronics is required.
Our universal evaluation electronics is meant to relieve the user from
the involvement of technology. A modern ASIC is used for the signal
processing which is pre-calibrated ex factory for 7 mV FS and 0 mV
Offset.
For a quick start, two potentiometers are provided on the circuit board
with which the zero setting and amplication can be mechanically ad-
justed, without which one has to resort to digital ASIC technology.
In addition, experienced users can directly access the register of ASIC
with the help of „ZMD Labkit“ (available as accessories) and carry out
the digital adjustment. In addition to the offset and amplication setting,
the digital adjustment method also enables linearisation and tempera-
ture compensation over a polynomial. Therefore, the evaluation elect-
ronics is also ideally suitable as an entry into the complex ASIC techno-
logy. The information and software necessary for it can be downloaded
free of charge from the homepage of the chip manufacturer.
In principle, the electronics is also suitable for a variety of other applica-
tions in which bridge signals are to be processed.
B+B Thermo-Technik GmbH | Heinrich-Hertz-Straße 4 | D-78166 Donaueschingen
Fon [phone] | Fax [phone] | [e-mail] | bb-sensors.com
1 / 5