Guralp-systems CMG-40T Manuel d'utilisateur télécharger pdf (Page 2)

CMG-40T

Table of Contents

1 Introduction............................................................................................................................4

1.1 Response options..............................................................................................................5

2 First encounters......................................................................................................................6

2.1 Handling notes..................................................................................................................6

2.2 Connections......................................................................................................................6

The breakout box...............................................................................................................6

The handheld control unit..................................................................................................7

Signal meter..................................................................................................................8

Calibration.....................................................................................................................9

Control commands........................................................................................................9

Banana plugs.................................................................................................................9

2.3 Zeroing the instrument.....................................................................................................9

Adjusting the mass position offsets manually...................................................................9

Adjusting the mass position offsets with a Handheld Control Unit................................11

Zeroing a 40TD digital instrument..................................................................................11

2.4 Installation notes.............................................................................................................14

3 Installing the 40T.................................................................................................................16

3.1 Installing in vaults..........................................................................................................16

Choosing a location.........................................................................................................16

Temperature stability.......................................................................................................17

Other considerations........................................................................................................18

3.2 Installing in pits..............................................................................................................19

Other installation methods...............................................................................................21

4 Calibrating the 40T..............................................................................................................23

4.1 The calibration pack.......................................................................................................23

Poles and zeroes...............................................................................................................24

Frequency response curves..............................................................................................25

Obtaining copies of the calibration pack.........................................................................25

4.2 Calibration methods.......................................................................................................26

4.3 Calibration with Scream! ...............................................................................................26

Sensor response codes.....................................................................................................30

4.4 Calibration with a handheld control unit........................................................................30

4.5 The coil constant............................................................................................................31

Appendix A Connector pinouts.............................................................................................32

2 Issue A

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Guralp-systems CMG-40T Manuel d'utilisateur Page 2