Stimulus Isolator

Stimulus Isolator

The FE180 Stimulus Isolator is suitable for both transcutaneous human nerve stimulation and stimulation of isolated nerves when obtaining evoked response measurements. This unit uses the analog output from a PowerLab to produce isolated constant current pulses. The FE180 Stimulus Isolator provides adjustable pulse amplitude, width and frequency. It is electronically isolated for subject safety and approved to the IEC60601-1 BF standard for human connection as a body protected (BF rated) instrument.

Item# Description U.S. List Price Quantity
77-0252 Stimulus Isolator (FE180)
77-0058 Stimulating Bar Electrode (MLADDF30)
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The FE180 Stimulus Isolator is suitable for both transcutaneous human nerve stimulation and stimulation of isolated nerves when obtaining evoked response measurements. This unit uses the analog output from a PowerLab to produce isolated constant current pulses. The FE180 Stimulus Isolator provides adjustable pulse amplitude, width and frequency. It is electronically isolated for subject safety and approved to the IEC60601-1 BF standard for human connection as a body protected (BF rated) instrument.


Compatibility:

The Stimulus Isolator is compatible with series 35 PowerLab.

For use with MLADDF30 Stimulating Bar Electrode.

Operation:

The output stage consists of a high-voltage constant-current source that can produce pulses of variable duration and amplitude under software control. The current source can deliver pulses up to 10 mA at 100 V compliance levels; its amplitude is set by a digital attenuator network, which is in turn controlled by the I²C logic. The output to the subject is through high-isolation optical couplers. Power for the stimulator current source is derived from the safety approved power pack External AC wall Transformer (plug pack) coupled through a custom isolation transformer (from which the isolated low voltage and 100 V supplies are derived).

The power pack complies with medical safety requirements. Under no circumstance should any other transformer be used with the FE180 Stimulus Isolator. During operation an indicator light on the front panel lights green with every pulse (it will glow yellow if the Stimulus Isolator is out of compliance). A small internal beeper can also be enabled to give an audible beep with every pulse delivered.

The FE180 Stimulus Isolator is supplied completed with the following:

• Shrouded Plugs (One RED, One BLACK) (2)

• I²C Cable (9-Pin Plug to 9-Pin Receptacle)

• BNC to BNC Cable

• Stimulus Isolator Owner's Guide

• Power Plug Pack (12 V AC, 20 V AC)
Specifications77-025277-0058
AC Line Leakage Current<200 nA p?p*na
Amplification Input AmplifierCESee product page for complete specifications
Certifications100 V fixed*na
Compliance VoltageI²C Port Provides control and power. Interface communications rate of ~50 Kbits/s*na
Control Port<1 µsec (1 kΩ load at 10 mA)

25 µsec (100 kΩ load at 0.5 mA)
*na
Current Fall Time100 µA, 1 mA, or 10 mA Full Scale*na
Current Ranges<1 µsec (1 kΩ load at 10 mA)

25 µsec (100 kΩ loadat 0.5 mA)
*na
Current Rise Time<1 µA p?p*na
Differential Output Noise2.2 x 4.7 x 10.2 in*na
Dimensions H x W x D English55 x 100 x 260 mm*na
Dimensions H x W x D Metric4000 V ACrms for 1 minute*na
Input Isolation RatingFE180*na
Model5 to 35 °C, 0 to 90 % humidity (non-condensing)MLADDF30
Operating ConditionsUp to 20%*na
Operating Duty CycleConstant-current stimulator with hardware limited repetition rate, with following discharge clamp*na
Output Configuration2 x 4 mm (0.16 in) shrouded banana plugs*na
Output Connection TypeRectangular, monophasic pulses with software-set pulse amplitude and duration*na
Output Waveform1*na
PackageNon-isolated circuitry supplied by PowerLab via I²C connection; isolated and high-voltage circuitry derives power from the external 12-volt AC, 300 mArms, wall-plug transformer; high voltage isolation is provided by an internal isolation transformer1
Power SourceData Acquisition*na
Product Family12 to 22 µs (variable)Data Acquisition
Pulse Control Current Rise Delay±0.01%*na
Pulse Control Duration Accuracy0.01 ms (10 µs) to 2.56 ms in 0.01 ms (10 µs) Steps*na
Pulse Control Pulse Duration Range±0.1% (determined by PowerLab)*na
Pulse Control Repetition Accuracy2 pulses per minute (0.0333 Hz), up to 200 Hz with chart for MacOS, 1 pulse per minute (0.017 Hz), up to 200 Hz with chart for Windows*na
Pulse Control Repetition Rate1% of Full Scale (1 mA, 10 mA, or 100 mA)*na
ResolutionIsolating On-Off switch flicks down to disconnect quickly*na
Safety EquipmentA single multi-color indicator displays the isolated stimulator status. A Green Flash indicates delivery of a valid stimulus. A Yellow Flash indicates an out-of compliance condition*na
Safety OtherApproved to IEC60601-1 BF (body protection) standard*na
Safety2 lb 15 oz*na
Weight English1.3 kg*na