power lab
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ADINSTRUMENTSML865 PowerLab 4/25T
Data Acquisition Systems
Description
The PowerLab 4/25T is a data acquisition system suited to teaching applications. With appropriate transducers and accessories the PowerLab 4/25T can be used to perform a broad range of human and animal experiments. The unit can record up to 200 000 samples per second and features individually selectable input sensitivities, analog output for stimulation or pulse generation, a high speed USB connection, built-in isolated stimulator, built-in dual bioamplifier and a powerful internal processor along with low- and high-pass filters. Chart and Scope software is supplied with the hardware unit.
Computer System Compatibility
PC Computers:
Pentium processor based system with minimum 32 MB RAM.Windows 2000 or later.USB hardware is required for PowerLab operation.
Macintosh Computers:
PowerPC based system with minimum 32 MB RAM.Mac OS X or later.USB hardware is required for PowerLab operation.
Chart & Scope Compatibility
The following versions of Chart and Scope software are required to operate a PowerLab 4/25T:
WINDOWS MACINTOSH ◆ Chart v4.2.2 or later ◆ Chart v4.2.1 or later ◆ Scope v3.6.13 or later ◆ Scope v3.6.10 or later
ApplicationsThe PowerLab 4/25T can record biological signals from humans and other sources, with full electrical isolation, and can also be used for any general-purpose stimulation. It is recommended for education applications.
Specifications (As tested at the time of printing and are subject to change)
Analog Inputs Channels 1 & 2
Number of input channels: 2 (non-isolated)Input configuration: Single-ended or differential (the latter only through the Pod
connectors) Amplification range: ±2 mV to ±10 V full scale in 12 steps:
Range Resolution ±10 V 312.5 μV ±5 V 156.25 μV ±2 V 62.5 μV ±1 V 31.25 μV ±0.5 V 15.625 μV ±0.2 V 6.25 μV ±0.1 V 3.125 μV ±50 mV 1.56 μV ±20 mV 625 nV ±10 mV 312.5 nV ±5 mV 156.25 nV ±2 mV 62.5 nV
Maximum input voltage: ±15 VInput impedance: ~1 MΩ || 47 pF @ DCLow-pass filtering: 25 kHz fixed 2nd order Further digital filtering provided by softwareAC coupling: DC or 0.1 Hz (software-selectable)Frequency response (–3 dB): 25 kHz @ ±10 V full scale, all gain rangesDC drift: Software correctedCMRR (differential): 96 dB @ 50 Hz (typical)Channel crosstalk: –80 dB typicalInput noise: < 2.4 μVrms referred to input
Pod Connectors
General features: Combined power, I2C and single ended or differential analog input signals on one connector.
Supply voltage: ±5 V regulatedMaximum current: 50 mA per Pod portCommunications: 2-wire I2CSignal input: Positive and negative analog inputsConnector type: 8-pin DIN
Bio Amp Input, Channels 3 and 4
Input configuration: 2 differential channels with common isolated ground Input impedance: ~100 MΩ to isolated ground (~200 pF per lead) using supplied
Bio Amp cable and lead wiresSafety: Approved to IEC601-1 BF (body protected) standard. Also approved to requirements of AS3200.1Isolation rating: 4000 V ACrms for 1 minute
Amplification ranges: ±20 μV to ±50 mV full scale in 11 steps Range Resolution ±50 mV 1.56 μV ±20 mV 0.78 μV ±10 mV 312 nV ±5 mV 156 nV ±2 mV 62.5 nV ±1 mV 31.25 nV ±500 μV 15.6 nV ±200 μV 6.25 nV ±100 μV 3.125 nV ±50 μV 1.56 nV ±20 μV 0.625 nV
Maximum input voltage: ±10 VGain accuracy: ±1% all rangesNon-linearity: <1% of full scale (better for ranges under 1 mV)Notch-filtering: 50 or 60 Hz notch filter, automatically selected to match mains
frequencyHigh-pass filtering: Single-pole 0.1, 0.3, 1, and 10 Hz (–3 dB) with accuracy of
±10%Low-pass filtering: 8th-order Bessel-type filters (linear time delay). Frequencies software-selectable at 20, 50, 100, 200, 500 Hz, and 1, 2, 5 kHz. Frequency accuracy is ±2%.DC blocking: ±0.5 VBaseline restoration: AutomaticNoise levels: <2.4 μVrms (0.1 Hz to 5 kHz bandwidth) <1.5 μVrms (0.1 Hz to 50 Hz bandwidth)IMRR (isolation mode): > 130 dB (@ 50 to 100 Hz)CMRR (common mode): > 75 dB (DC to 100 Hz) > 60 dB (@ 1 kHz)Input leakage current: < 6 μArms @ 240 V, 50 Hz < 4 μArms @ 120 V, 60 HzAudio output: Stereo output supplying signals from both Bio Amp channels.
Suitable for earphones, headphones, or most externally powered speakers. Output is a 100 mV signal for any input range.
Sampling
ADC resolution: 16 bitsLinearity error: ±2 LSB (from 0 °C to 70 °C)Maximum sampling rates: 200 kHz on one channel; 100 kHz on two channels; 40 kHz on three or four channels.Available sampling rates: 200 kHz down to 0.2 Hz
Output Amplifier
Output configuration: Complementary non-isolatedOutput resolution: 16 bits
Maximum output current: 100 mA (max)Output impedance: 0.4 Ω typicalSlew rate: 6 V/μsSettling time: 2 μs (to 0.01% of FSR for LSB change)Linearity error: ±1 LSB (from 0 °C to 70 °C)Output ranges: ±200 mV to ±10 V full scale in six steps
Range Resolution ±10 V 312.5 μV ±5 V 156.25 μV ±2 V 62.5 μV ±1 V 31.25 μV ±500 mV 15.625 μV ±200 mV 6.25 μV
Isolated Stimulator Output
Output configuration: Constant-current stimulator with hardware limited repetition rate
Isolation rating: 4000 Vrms to ground as per IEC601-1 2000 Vrms (60 seconds) to Bio Amp inputsPulse duration: 50–200 μs (software-selectable)Compliance voltage: 100–110 V typicalOutput current: 0–20 mA in 0.1 mA steps (software adjustable)Pulse rate: Software-selectable, but hardware-limited to a maximum of
20 Hz for safetySafety indicators: A single multi-colour indicator displays the isolated stimulator
status. A green flash indicates delivery of a valid stimulus. A yellow flash indicates an out-of-compliance condition.
Safety switch: Provides physical disconnection of the stimulator from the subject
External Trigger
Trigger mode: TTL level (isolated) or contact closure (non-Isolated), software selectable
Trigger threshold: 1.2 V ± 0.5 V (TTL compatible)Hysteresis: 0.5 V (turns off at 2.8V ± 0.25 V) Input Load: 1 TTL loadMaximum input voltage: ±12 VMinimum pulse width: 5 μs
Microprocessor and Data Communication
CPU: PPC403 GCX (60 MHz Internal)RAM: 4 MB DRAMROM: 2 Mbit FLASH ROMData communication: Hi-speed USB 2.0 - max 480 Mb/sec transfer giving a maximum
transfer. Also compatible with USB 1.1
Expansion Ports
I2C expansion port: Power and control bus for Front-end units. Supports two Front-ends connected to the PowerLab’s analog inputs. Interface communications rate of up to 10,000 bits/s.
Physical Configuration
Dimensions (w x h x d): 200 mm x 65 mm x 250 mm ( 7.9 x 2.6 x 9.8")Weight: 1.2 kg (2.65 lbs) dependent on type of power supplyOperating voltage: 90 to 250 V AC 47 - 440 HzNominal power needs: 15 VA (62mA @ 240 V or 130 mA @ 115 V) (no extra
Front-ends attached)Maximum power needs: 50 VA (full complement of Front-ends)Operating temperature range: 0 to 35 °C, 0 to 90% humidity (non-condensing).
PowerLab 4/25T Diagrams
Front panel
Back panel
ADINSTRUMENTS.com ISO 9001:2008 Certified Quality Management System
WARRANTY: ADInstruments PowerLab Systems, Front-end and Pod Signal Conditioners are warranted against defects in materials and workmanship for a period
of 3 years from the date of purchase. Third party products are covered by the manufacturer’s warranty. Warranties are void if the product has been damaged
due to negligence. Consumables and electrodes are not covered by a warranty. All questions regarding service and warranty should be directed to your nearest
ADInstruments representative or one of the offices listed below.
North AmericaTel: +1 888 965 6040
Fax: +1 866 965 9293
South AmericaTel: +56 2 356 6749
Fax: +56 2 356 6786
United KingdomTel: +44 1865 891 623
Fax: +44 1865 890 800
BrazilTel: +55 11 3266 2393
Fax: +55 11 3266 2392
GermanyTel: +49 6226 970105
Fax: +49 6226 970106
Indian SubcontinentTel: +91 11 2693 3930
Fax: +91 11 2693 3929
North AsiaTel: +86 21 5830 5639
Fax: +86 21 5830 5640
AustraliaTel: +61 2 8818 3400
Fax: +61 2 8818 3499
South East AsiaTel: +60 3 8024 5296
Fax: +60 3 8023 6307
New ZealandTel: +64 3 477 4646
Fax: +64 3 477 4346
JapanTel: +81 52 932 6462
Fax: +81 52 932 6755
InternationalTel: +61 2 8818 3400
Fax: +61 2 8818 3499
ML865-DC-06A
Ordering Information
ML865 PowerLab 4/25TIncludes:PowerLab 4/25T 4-Channel Data Acquisition SystemChart & Scope Software Installer CDTeaching Resources CDCable Kit including Power Cord, BNC to BNC Test Cable, USB CableGetting Started with PowerLab Manual Chart Quick Reference GuideMLA2540 5-Lead Shielded Bio Amp CableMLA2505 Shielded Lead Wires (5)MLADDF30 Stimulating Bar ElectrodeFinger Pulse Transducer
CautionRead “Statement of Intended Use” on our website or in “Getting Started with PowerLab” before use.