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OPERATING INSTRUCTIONS AND
SYSTEM DESCRIPTION FOR THE
DPA-2FS
DIFFERENTIAL AMPLIFIER /
FILTER MODULE
FOR EPMS SYSTEMS
VERSION 2.0
npi 2015
npi electronic GmbH, Bauhofring 16, D-71732 Tamm, Germany
Phone +49 (0)7141-9730230; Fax: +49 (0)7141-9730240
support@npielectronic.com; http://www.npielectronic.com
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Summary of Contents for NPI DPA-2FS
- Page 1 OPERATING INSTRUCTIONS AND SYSTEM DESCRIPTION FOR THE DPA-2FS DIFFERENTIAL AMPLIFIER / FILTER MODULE FOR EPMS SYSTEMS VERSION 2.0 npi 2015 npi electronic GmbH, Bauhofring 16, D-71732 Tamm, Germany Phone +49 (0)7141-9730230; Fax: +49 (0)7141-9730240 support@npielectronic.com; http://www.npielectronic.com...
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Page 2: Table Of Contents
EPMS-07, EPMS-E-07 and EPMS-H-07 ..............6 EPMS-07 and EPMS-H-07 ..................6 EPMS-E-07 ........................6 EPMS-03 ........................6 3. DPA-2FS Differential Amplifier / Filter Module ............. 7 3.1. DPA-2FS Components ....................7 3.2. System Description ...................... 7 3.3. Signal Flow Diagram ....................7 3.4. -
Page 3: Safety Regulations
VERY IMPORTANT: Instruments and components supplied by npi electronic are NOT intended for clinical use or medical purposes (e.g. for diagnosis or treatment of humans), or for any other life-supporting system. npi electronic disclaims any warranties for such purpose. Equipment supplied by npi electronic must be operated only by selected, trained and adequately instructed personnel. -
Page 4: Epms-07 Modular Plug-In System
2.1. General System Description / Operation The npi EPMS-07 is a modular system for processing of bioelectrical signals in electrophysiology. The system is housed in a 19” rack-mount cabinet (3U) has room for up to 7 plug-in units. The plug-in units are connected to power by a bus at the rear panel. -
Page 5: Epms-03
Note: The chassis of the PWR-03D is connected to protective earth, and it provides protective earth to the EPMS-E housing if connected. Figure 3: Left: PWR-03D front panel view Right: PWR-03D rear panel view. Note: This power supply is intended to be used with npi EPMS-E systems only. version 2.0 page 5... -
Page 6: System Grounding
DPA-2FS User Manual 2.7. System Grounding EPMS-07/EPMS-03 The 19" cabinet is grounded by the power cable through the ground pin of the mains connector (= protective earth). In order to avoid ground loops the internal ground is isolated from the protective earth. The internal ground is used on the BNC connectors or GROUND plugs of the modules that are inserted into the EPMS-07 housing. -
Page 7: Dpa-2Fs Differential Amplifier / Filter Module
The DPA-2FS differential amplifier/filter is a plug-in unit for the npi EPMS-07 modular system. The DPA-2FS is designed to amplify and filter small bio-electrical signals. The input voltage range is ±12 V, the inputs are protected up to 15 V. 2 overload-LEDs indicate if the linear region of the amplifier is exceeded. -
Page 8: Description Of The Front Panel And Operation
DPA-2FS User Manual 3.4. Description of the Front Panel and Operation Figure 5: DPA-2FS front panel view version 2.0 page 8... - Page 9 DPA-2FS User Manual In the following description of the front panel elements each element has a number that is related to that in Figure 5. The number is followed by the name (in uppercase letters) written on the front panel and the type of the element (in lowercase letters). Then, a short description of the element is given.
- Page 10 Note: By combining HIGH- and LOWPASS filters, a filter with bandpass characteristic can be implemented easily. (6) + OVER, - OVER LEDs LEDs indicating that the DPA-2FS exceeds its linear range (±10 V). (7) OUT connector BNC connector providing the conditioned signal.
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Page 11: Literature
DPA-2FS User Manual (13) GAIN ZERO ADJ. trimpots Trimpots to compensate for amplifier offsets. If the baseline is not zero even if the input is grounded, this offset can be compensated independently for the two GAIN stages. Compensation procedure: Set the input coupling switches to zero to ground the inputs, and set the HIGH PASS FILTER to 400 Hz. -
Page 12: Technical Data
DPA-2FS User Manual 5. Technical Data DPA-2FS Input range: ±12 V; protected up to 15 V Input impedance: 10 MΩ, related to ground AC coupling at input: corner frequency of 0.1 Hz (if AC / 0 / DC-switch at BNC connector is switched to AC) OFFSET compensation: set by ten-turn potentiometer, range ±0.1, ±1 V or ±10 V set by...
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