NPI INR-01-T Mode d'emploi

OPERATING INSTRUCTIONS AND

SYSTEM DESCRIPTION FOR THE

INR-01-T

SIGNAL ENVELOPE / INTEGRATOR

MODULE FOR EPMS SYSTEMS

VERSION 1.2

npi 2015

npi electronic GmbH, Bauhofring 16, D-71732 Tamm, Germany

Phone +49 (0)7141-9730230; Fax: +49 (0)7141-9730240

[email protected]; http://www.npielectronic.com

INR-01-T User Manual

version 1.2 page 2

Table of Contents

Safety Regulations .............................................................................................................. 3

EPMS-07 Modular Plug-In System .................................................................................... 4

2.1.

General System Description / Operation ..................................................................... 4

2.2.

EPMS-07 Housing....................................................................................................... 4

2.3.

EPMS-H-07 Housing................................................................................................... 4

2.4.

EPMS-E-07 Housing ................................................................................................... 4

2.5.

EPMS-03 ..................................................................................................................... 5

2.6.

PWR-03D .................................................................................................................... 5

2.7.

System Grounding ....................................................................................................... 6

EPMS-07/EPMS-03 .................................................................................................... 6

EPMS-E-07.................................................................................................................. 6

2.8.

Technical Data............................................................................................................. 6

EPMS-07, EPMS-E-07 and EPMS-H-07 .................................................................... 6

EPMS-07 and EPMS-H-07.......................................................................................... 6

EPMS-E-07.................................................................................................................. 6

EPMS-03 ..................................................................................................................... 6

INR-01-T Signal Envelope / Integrator Module ................................................................. 7

3.1.

INR-01-T Components ................................................................................................ 7

3.2.

INR-01-T System Description..................................................................................... 7

3.4.

Description of the Front Panel and Operation ............................................................. 7

Examples............................................................................................................................. 9

Technical Data .................................................................................................................... 11

INR-01-T User Manual

version 1.2 page 3

1. 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. For details please consult the GENERAL

TERMS OF DELIVERY AND CONDITIONS OF BUSINESS of npi electronic, D-71732

Tamm, Germany.

1) GENERAL: This system is designed for use in scientific laboratories and must be

operated only by trained staff. General safety regulations for operating electrical devices

should be followed.

2) 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.

The device is to be operated only at 115/230 Volt 60/50 Hz AC. Please check for

appropriate line voltage before connecting any system to mains.

Always use a three-wire line cord and a mains power-plug with a protection contact

connected to ground (protective earth).

Before opening the cabinet, unplug the instrument.

Unplug the instrument when replacing the fuse or changing line voltage. Replace fuse

only with an appropriate specified type.

3) STATIC ELECTRICITY: Electronic equipment is sensitive to static discharges. Some

devices such as sensor inputs are equipped with very sensitive FET amplifiers, which can

be damaged by electrostatic charge and must therefore be handled with care. Electrostatic

discharge can be avoided by touching a grounded metal surface when changing or

adjusting sensors. Always turn power off when adding or removing modules,

connecting or disconnecting sensors, headstages or other components from the

instrument or 19” cabinet.

4) TEMPERATURE DRIFT / WARM-UP TIME: All analog electronic systems are

sensitive to temperature changes. Therefore, all electronic instruments containing analog

circuits should be used only in a warmed-up condition (i.e. after internal temperature has

reached steady-state values). In most cases a warm-up period of 20-30 minutes is

sufficient.

5) HANDLING: Please protect the device from moisture, heat, radiation and corrosive

chemicals.

INR-01-T User Manual

version 1.2 page 4

2. 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.

The plug-in units must be kept in position by four screws (M 2,5 x 10). The screws are

important not only for mechanical stability but also for proper electrical connection to the

system housing. Free area must be protected with covers.

2.2. EPMS-07 Housing

The following items are shipped with the EPMS-07 housing:

✓EPMS-07 cabinet with built-in power supply

✓Mains cord

✓Fuse 2 A / 1 A, slow (inserted)

✓Front covers

Figure 1: Left: front view of empty EPMS-07 housing.

In order to avoid induction of electromagnetic noise the power supply unit, the power switch

and the fuse are located at the rear of the housing (see Figure 2, right).

2.3. EPMS-H-07 Housing

In addition to the standard power supply of the EPMS-07, the EPMS-H-07 has a built-in high

voltage power supply. This is necessary for all MVCS / MVCC modules, the HVA-100, HV-

TR150 and HVC-03M modules. The output voltage depends on the modules in use.

2.4. EPMS-E-07 Housing

The following items are shipped with the EPMS-E-07 housing:

✓EPMS-E-07 cabinet

✓External Power supply PWR-03D

✓Power cord (PWR-03D to EPMS-E-07)

✓Mains chord

✓Fuse 1.6 A / 0.8 A, slow (inserted)

✓Front covers

INR-01-T User Manual

version 1.2 page 5

The EPMS-E-07 housing is designed for low-noise operation, especially for extracellular and

multi-channel amplifiers with plugged in filters. It operates with an external power supply to

minimize distortions of the signals caused by the power supply.

2.5. EPMS-03

The following items are shipped with the EPMS-03 housing:

✓EPMS-03 cabinet with built-in power supply

✓Mains cord

✓Fuse 034 A / 0,2 A, slow (inserted)

✓Front covers

Figure 2: Left: front view of EPMS-03 housing. Right: rear panel detail of EPMS-03 and

EPMS-07 housing.

In order to avoid induction of electromagnetic noise the power supply unit, the power switch

and the fuse are located at the rear of the housing (see Figure 2, right).

2.6. PWR-03D

The external power supply PWR-03D is capable of driving up to 3 EPMS-E housings. Each

housing is connected by a 6-pole cable from one of three connectors on the front panel of the

PWR-03D to the rear panel of the respective EPMS-E housing. (see Figure 3,

Figure 4). A POWER LED indicates that the PWR-03D is powered on (see Figure 3, left).

Power switch, voltage selector and fuse are located at the rear panel (see Figure 3, right).

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.

INR-01-T User Manual

version 1.2 page 6

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. The internal ground and

mains ground (= protective earth) can be connected by a wire using the ground plugs on the

rear panel of the instrument. It is not possible to predict whether measurements will be less or

more noisy with the internal ground and mains ground connected. We recommend that you try

both arrangements to determine the best configuration.

EPMS-E-07

The 19" cabinet is connected to the CHASSIS connector at the rear panel. It

can be connected to the SYSTEM GROUND (SIGNAL GROUND) on the

rear panel of the instrument (see

Figure 4).

The chassis can be linked to PROTECTIVE EARTH by connecting it to the

PWR-03D with the supplied 6-pole cable and by interconnecting the

GROUND and PROTECTIVE EARTH connectors on the rear panel of the

PWR-03D (see Figure 3). Best performance is generally achieved without

connection of the chassis to protective earth.

Important: Always adhere to the appropriate safety measures.

Figure 4: Rear panel connectors of the EPMS-E-07

2.8. Technical Data

EPMS-07, EPMS-E-07 and EPMS-H-07

19” rackmount cabinet, for up to 7 plug-in units

Dimensions: 3U high (1U=1 3/4” = 44.45 mm), 254 mm deep

EPMS-07 and EPMS-H-07

Power supply: 115/230 V AC, 60/50 Hz, fuse 2 A / 1 A slow, 45-60 W

EPMS-E-07

External power supply (PWR-03D) 115/230 V AC, 60/50 Hz, fuse 1.6/0.8 A, slow

Dimensions of external power supply: (W x D x H) 225 mm x 210 mm x 85 mm

EPMS-03

Power supply: 115/230 Volts AC, 60/50 Hz, fuse 0.4 A / 0.2 A slow

Maximum current supply: 500 mA

INR-01-T User Manual

version 1.2 page 7

Dimensions: 3U high (1U=1 3/4” = 44.45 mm), 254 mm deep, 265 mm wide

3. INR-01-T Signal Envelope / Integrator Module

3.1. INR-01-T Components

The following items are shipped with the INR-01-T:

✓Integrator module for the EPMS-07 system

✓User manual

3.2. INR-01-T System Description

The INR-01-T module is designed for generating envelopes from noisy INPUT signals, e.g. to

facilitate detection of oscillations from extracellular measurements in excitable tissues. The

INPUT signal is rectified by an “absolute value” circuit and subsequently applied to a “leaky

integrator” for filtering. The time constant of integration can be set using a 6-position switch.

Additionally, a THRESHOLD can be set in order to mask the noise around the baseline that

contains no information of interest, and the OUTPUT envelope can be corrected for OFFSETs

before amplification.

3.4. Description of the Front Panel and Operation

Figure 5: INR-01-T front panel view

INR-01-T User Manual

version 1.2 page 8

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.

(1) T(ms) switch

6-position switch for setting the time constant of the “leaky integrator”

(2) THRESHOLD potentiometer

10-turn potentiometer for setting the threshold of the signal to be processed. Used to blank a

noisy baseline that contains no signal of interest. Range: ±1 V

(3) OFFSET potentiometer

10-turn potentiometer for canceling the offset of the OUTPUT. Range: 0…1 V

(4) OUT connector

BNC connector providing the processed signal

(5) THR.OUT connector

BNC connector providing the signal processed by the THRESHOLD electronics. This signal

will be rectified and integrated if the THRESHOLD mode is selected (see #8)

Note: The output is always active, regardless of the position of the THRESHOLD ON / OFF

switch.

(6) IN connector

BNC connector for the input of the signal to be processed

(7) GAIN potentiometer

10-turn potentiometer for continuous setting the amplification factor of the integrated signal.

Range: x1…x11

(8) THRESHOLD ON / OFF switch

Switch to enable (THRESHOLD) or disable (OFF) the threshold function

Note: The THR.OUT output is always active, regardless of the position of the THRESHOLD

ON / OFF switch.

INR-01-T User Manual

version 1.2 page 9

4. Examples

All traces were recorded with an integrator time constant of 5 ms and a gain of 2.

-3000

-2000

-1000

1000

2000

3000

4000

5000

0 500 1000 1500 2000

Envelope

THR.OUT

Source

Figure 6: Example using a triangle voltage as signal source, no THRESHOLD set.

-3000

-2000

-1000

1000

2000

3000

4000

5000

0 500 1000 1500 2000

Envelope

THR.OUT

Source

Figure 7: Example using a triangle voltage as source, with THRESHOLD set.

INR-01-T User Manual

version 1.2 page 10

-4000

-3000

-2000

-1000

1000

2000

3000

4000

0 50 100 150 200

Envelope

THR.OUT

Source

Figure 8: Example using 50 Hz noise as source, no THRESHOLD.

-4000

-3000

-2000

-1000

1000

2000

3000

4000

0 50 100 150 200

Envelope

THR.OUT

Source

Figure 9: Example using 50 Hz noise as source, with THRESHOLD set.

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