Guralp-systems ART Manual do Utilizador descarregar pdf (Página 8)

ART

number (as given by the first four characters of the Stream ID)

for the digitizer which produces the data stream.

For example: to add calibration information for a digitizer with

System ID GURALP outputting streams DEMOZ2, DEMON2,

DEMOE2, etc., you would add a section beginning with the line

[GURALP-DEMO]

If you move an instrument from one digitizer to another, you

will need to update the calvals.txt file to reflect the change.

• To set the serial number of the instrument, include the

line

Serial-Nos=serial-number

• Scream! cannot tell what instrument is connected to the

digitizer. This line is provided to help you remember

which set of calibration values you have used, and to

provide a title for calibration graphs. If you attach a

different instrument to the same digitizer, you will need

to enter new calibration values to reflect the new

instrument.

• To set the sensitivity of the digitizer, include the line

VPC=sensitivity

VPC stands for voltage per count, measured in units of

μV/count. This is sometimes given as μV/Bit on the digitizer

calibration sheet.

• To set the sensitivity of the calibration channel, include

the line

CALVPC=sensitivity

as for the other digitizer channels.

• To set the value of the calibration resistor, include the

line

CALRES=resistance

Güralp Systems digitizers normally use a 51 kΩ resistor

(CALRES=51000).

• To set the sensor type, include the line

8 Issue C

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Guralp-systems ART Manual do Utilizador Página 8