EMF-16
Precision Electrochemistry EMF Interface

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download Software Instruction Supplement block diagram

OVERVIEW

The EMF16 is a high-resolution, high input impedance, data acquisition system for electrochemistry applications. It connects to a PC serial port for presentation and storage of EMF data. The bundled software is written by electrochemists for electrochemistry. It allows up to 16 channels of data to be scanned and displayed, and saved to the disk in real time.The EMF16 is built around our proven 24-bit A/D system. The DC specifications are much better than those of most pH meters. Linearity is 0.002% of full scale, input impedance is 10¹³ ohms, reproducibility is better than one part per million. BNC connectors are provided for the 16 buffered inputs and for the buffered reference electrode. All inputs are protected against overvoltage. Three measuring modes are selectable via a front-panel switch. Further flexibility is provided through software configuration.

The EMF 16 was developed cooperatively with ETH in Switzerland in 1999 to interface with Ion Selective Electrodes. The high channel count, high input impedance interface has since proved generally useful for electrochemistry. The EMF16 is in use in 20 countries around the world and is cited regularly in published research.

The EMF16 is supplied as a complete system including the interface box and Windows software, serial cable, and power supply.

SPECIFICATIONS

A/D TYPE

24-bit delta-sigma converter with microncontroller supervisor and optical isolation

MONOTONICITY

23-bits

LINEARITY

+/-0.002% of full scale

DIFFERENTIAL INPUT RANGE

+/-5 volts

DC COMMON MODE RANGE

+/-6.5 volts

DC COMMON MODE REJECTION

-100dB typical

INPUT PROTECTION

Will withstand up to 40 volts continuous overvoltage

INPUT IMPEDANCE

10^13 ohms typical

POWER REQUIREMENT

110 VAC or 220 VAC

INTERFACE

RS-232, compatible with USB adapter cables

OTHER SOFTWARE

General-purpose acquisition and graphing software for Win98 and later available for free download at our website

OPTIONS

220 VAC power supply	no charge
1015 ohm input impedence	$200
8-channel unit with fully differentical inputs for combination electrodes	$200
RTD temperature probe	$275
Expanded systems - we can increase the channel count to 32, 48, or 64.	Contact factory for pricing

USB to serial converter  $20

SIZE

9" wide x 8" deep x 2.5" high

SHIPPING WEIGHT

7 pounds

AVAILABILITY

Stock to 3 weeks

SINGLE-PIECE PRICE

$1995.00

L-EMF DAC Software Version 3.0 is now shipped with each EMF16
Features include:

Flexible acquistion rates and filtering Auto-scaling graphics Self-calibration with easy offset voltage suppression Full-speed operation, even on slower computers Pause Control Test Mode Pop-up Help Enhanced interoperability Win98/XP/2K/Vista/Win7 operating system compatibility

HOME

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Normal Windows style app written in VisualBASIC Win98/ME/2k/XP

Full Installation package   (approx. 1.4meg) (for those who have never installed this software)

Download archive instructions for opening archive (plain text style format)

Main Application and support files only   (approx. 74k) (may include DLL and .ini files)

Download archive instructions for opening archive (plain text style format)

Screen Shots Documentation (also included in archive)

EMF16  RTD

Windows style app written in VisualBASIC 2k/XP/Win7

Full Installation package   (approx. 2.9meg) ( for those who have never installed this software )

Download archive basic instructions for and running software additional instructions for and running software ( instruction in .RTF style format )

EMF16  Bundled L-EMF Software Manual

Download archived manual  (approx. 1.8meg)

 

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INSTRUCTION  SUPPLEMENT  for  EMF16

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There are three grounding options selected by the mode switch above our logo:

DIFF is the best, for pure differential measurements. In the  DIFF  positions,  you  *must*  add a third connection to the solution. Use a separate wire to connect the solution to the  COMMON  terminal or   BNC  connector.

For  SAFE  and  COMMON  positions,  do not use the third wire.  In these cases,  the reference input is connected internally to the common. The Safe mode protects the hardware against severe overvoltage and may be just a bit noiser as a result.  The  SAFE  and  COMMON  POSITIONS  can have the effect of lowering the input impredance on the reference side.

The input impedance is  10¹³  at room temperature.  Input current is typically 3 picoamps.  A  10¹⁵  version is available as an option.  An 8 channel differential option is also available.

For more information about the internal function of the  EMF16,   refer to the Model 201 Manual.  The  16 EMF  channels are addressed at analog input channel number zero,  external sub-channels 0 through 15.


NOTE:  For demanding applications,  you may want to consider the free Model 201  graphics software  at our web site.

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Last Modified 2-23-12 by Tim Van Dusen