Agilent Technologies All Troubleshooting Guide download pdf (Page 154)

Lab Exercise: Commands

Registers, Objects, and Tables

146

Objects

Objects are the data you work with such as chromatograms or spectra. Each

object has a header which contains a description of the object. For instance, if the

object is a chromatogram, the header contains the injection time and date, the

operator name and vial number.

Objects will also have a data block. The data block is the actual x and y data

points that describe the chromatogram or spectrum.

Objects may also comprise tables. Tables are made of a series of rows and

columns which typically hold information about the object. An example of a

table would be the IntResults table created after chromatograms are integrated.

The rows indicate the number of integrated chromatographic peaks and the

column names include retention time, area, peak height, and etc…. Tables also

have an associated table header. The IntResults table header will tell you how

many rows are in the table, thus how many integrated peaks.

Use the following commands to load objects into registers, access the information

from the object header, access data points from the data block, and retrieve

information from tables. In the following example, you will load a

chromatographic signal into ChromReg, integrate the chromatogram, then access

information from the object header, data block and IntResults table.

Loading a chromatogram into a Register as an Object

1) Load a data file into memory:

File c:\chem32\#\data\demo\demodad.d <enter>

where # is your instrument number.

2) Load the chromatographic signals into the ChromReg register by typing:

LoadSignal ,,,ChromReg <enter>

3) To view the first of three chromatograms loaded type:

Draw 2,ChromReg[1] <enter>

1 2 ... 149 150 151 152 153 154 155 156 157 158 159 ... 210 211

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Agilent Technologies All Troubleshooting Guide Page 154