ADInstruments
Advanced Features of
LabChart
Name:
Overview
Channel Calculations (Arithmetic, Derivative … )
Cyclic Measurements
Data Pad
Macros
Examples
© 2006 ADInstruments Pty Ltd
LabChart Software
Provides easy recording and data integrity
Real-time and offline powerful analysis features
Easy selection of settings and display options
Optional functionality with LabChart Modules and
Extensions
© 2006 ADInstruments Pty Ltd
Channel Calculations
Channel Calculations
Arithmetic
Derivative
Integral
Digital Filters
Smoothing
Cyclic Measurements
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Channel Calculations Demonstration
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Cyclic Measurements
Features of Cyclic Measurements
Feature in Channel Calculations
Used to analyze periodic waveforms
Real-time and offline analysis
Preprocesses the signal
Automated Cycle detection
Automated Calculation of Cyclic Parameters
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Cyclic Measurements
Setup
Output
Detection Settings
Detection Adjustments
Preview of Detected Cycles
Customizing Presets
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Cyclic Measurement Demonstration
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Data Pad
Features of Data Pad
A spreadsheet used to log numerical recorded data
3 logging data options
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Add to Data Pad
 Adding a single data point
 Adding a selection of data
Multiple Add to Data Pad
 Adding multiple recorded data within a specified duration
Timed Add to Data Pad
 Real-time adding of recorded data
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Data Pad Demonstration
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Macros
Features of Macros
A group of recorded LabChart commands, which can
be executed with a single command
All recorded commands are played back in the exact
sequence they were recorded
Help to speed up repetitive and tedious tasks
Automate recording and analysis of data
© 2006 ADInstruments Pty Ltd
Macro Types
Types of Macros
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Sampling (or Recording)
Analysis
Combined Sampling & Analysis
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Applications of Macros
Example Uses of Macros

Sampling
 Change the settings for stimulation (Output 1, 2 or
Isolated Stimulator)
 Set up triggering
 Save data as a new file
 Provide a message or alert
 Add comments
© 2006 ADInstruments Pty Ltd
Applications of Macros
Example Uses of Macros

Analysis
 Repeatedly log waveform parameters into the Data
Pad
 Print selected data (e.g. from the Zoom window)
 Find comments and select data before, after or
around the comment
© 2006 ADInstruments Pty Ltd
Hints for Writing Macros
Hints for Writing Macros
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Write down all the steps involved (keep a copy in
LabChart’s Notebook)
Break complex operations into several macros then
combine them into one macro
Modify the steps of an existing macro to suit your needs
Use LabChart’s Online Help
Call or email ADInstruments for help
© 2006 ADInstruments Pty Ltd
Macro Demonstration
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Find and Add all
Peaks to Data Pad
Find and Add all Peaks to Data Pad
Macro menu

Start Recording
Command menu

Find: Select Go, Start of this block, Set active point, Find
Macro menu

Repeat While In Block
Command menu
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Find: Select Find Data, Next Arrow, Local Maxima, Single
point Selection, Find
Add to Data Pad
Macro menu


End Repeat
Stop Recording and Name the macro
© 2006 ADInstruments Pty Ltd
Continuous Saving Recording
Data Categories and Types
Files
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LabChart Data Files
LabChart Setting Files
Text (txt)
Excel (xls)
Data Blocks
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Data Blocks
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Limitations
Data File (Max Size = 2 GB)
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Stop Recording,
Save the File
Close the File
Start a New File
Data Block (Max Size = 1 GB)
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Stop Recording
Save Data
Start Recording
© 2006 ADInstruments Pty Ltd
Limitations
Data File
(Max Size = 2 GB)
DB
DB
DB
Example 1
Example 2
Continuous Recording
DB = Data Block
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DB
DB
DB
DB
DB
DB
(Max = 1 GB) (Max = 1 GB)
Sampling and Saving
Sampling
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
Data Accuracy and Precision
File Size
Saving

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Permanent Data Storage
Resets Data Block Capacity
© 2006 ADInstruments Pty Ltd
Formula (Estimation)
Data Block Size = No. of Channels x Sampling Rate x Recording Duration x 2
Recording Duration
=
Data Block Size
No. of Channels x Sampling Rate x 2
Example
The maximum continuous recording duration for 3 channels, sampled
at 1k/s is:
Recording Duration
© 2006 ADInstruments Pty Ltd
= 1 GB/(3 x 1000/s x 2)
= 166667 seconds
= 46 hours
Formula (Estimation)
Example
The maximum continuous recording duration for 3 channels, sampled
at 1k/s is:
Recording Duration
= 1 GB/(3 x 1000/s x 2)
= 46 hours
Therefore if the Data Block was saved, you could then record
another new Data Block of similar duration.
File Recording Duration (2 Data Blocks)
© 2006 ADInstruments Pty Ltd
= 46 x 2
= 92 hours
Macro: Long Duration Recordings
Clearing
Data
Block
Resetting
Saving
Raw Data
Temp File
Data Block
Sampling
New Unique File
File01.adicht
File02.adicht
File03.adicht
© 2006 ADInstruments Pty Ltd
Programming Long Duration
Recordings using Macros
Macros
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Sample
 Setting the Sampling Duration
Save as no.
 Saving the data into a file with a Unique Number
Remove data
Clearing the data from the Data Block
X times
 Repeats Sample, Save as no. and Remove data
© 2006 ADInstruments Pty Ltd