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OPERATING INSTRUCTIONS AND
SYSTEM DESCRIPTION FOR THE
DPA-2FX
DIFFERENTIAL AMPLIFIER /
FILTER MODULE
FOR EPMS SYSTEMS
VERSION 1.8
npi 2014
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-2FX
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Page 1: Differential Amplifier
OPERATING INSTRUCTIONS AND SYSTEM DESCRIPTION FOR THE DPA-2FX DIFFERENTIAL AMPLIFIER / FILTER MODULE FOR EPMS SYSTEMS VERSION 1.8 npi 2014 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... -
Page 2: Table Of Contents
2.6. Technical Data ......................5 EPMS-07 ........................5 EPMS-E-07 ........................5 DPA-2FX Differential Amplifier / Filter Module ............6 3.1. DPA-2FX Components ....................6 3.2. System Description ...................... 6 ... -
Page 3: Safety Regulations
General safety regulations for operating electrical devices should be followed. AC MAINS CONNECTION: While working with the npi systems, always adhere to the appropriate safety measures for handling electronic devices. Before using any device please read manuals and instructions carefully. -
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” rackmount 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: System Grounding
DPA-2FX User Manual ___________________________________________________________________________ Figure 1: PWR-03D front panel view Figure 2: PWR-03D rear panel view Note: This power supply is intended to be used with npi EPMS-E systems only. 2.5. System Grounding EPMS-07 The 19" cabinet is grounded by the power cable through the ground pin of the mains connector (= protective earth). -
Page 6: Dpa-2Fx Differential Amplifier / Filter Module
The DPA-2FX differential amplifier/filter is a plug-in unit for the npi EPMS-07 modular system. The DPA-2FX 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 7: Description Of The Front Panel And Operation
DPA-2FX User Manual ___________________________________________________________________________ 3.4. Description of the Front Panel and Operation Figure 4: DPA-2FX front panel view ___________________________________________________________________________ version 1.8 page 7... - Page 8 DPA-2FX User Manual ___________________________________________________________________________ In the following description of the front panel elements each element has a number that is related to that in Figure 4. 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 9 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-2FX exceeds it’s linear range (10 V). (7) OUT connector BNC connector providing the conditioned signal.
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Page 10: Literature
DPA-2FX 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: ... -
Page 11: Technical Data
DPA-2FX User Manual ___________________________________________________________________________ 5. Technical Data DPA-2FX Input range: ±12 V; protected up to 15 V Input impedance: 10 M, related to ground Input capacitance: 30 pF 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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