Guralp Systems CMG-3T - Manual (Page 2)

CMG-3T
Table of Contents
1 Introduction...............................................................................................................3
1.1 Options................................................................................................................4
2 Installing the 3T........................................................................................................7
2.1 First encounters..................................................................................................7
2.2 Installation notes..............................................................................................10
2.3 Installing in vaults............................................................................................11
2.4 Installing in pits................................................................................................14
2.5 Installing in post-holes....................................................................................18
3 Calibrating the 3T...................................................................................................20
3.1 The calibration pack.........................................................................................20
3.2 Calibration methods.........................................................................................23
3.3 Calibration with Scream! ................................................................................23
3.4 Calibration with a hand-held control unit.......................................................28
3.5 The coil constant..............................................................................................28
4 Accessories...............................................................................................................30
4.1 The breakout box..............................................................................................30
4.2 The hand-held control unit..............................................................................31
4.3 Integrated State-of-Health Controller...............................................................33
5 Inside the 3T............................................................................................................35
5.1 The sensors.......................................................................................................35
5.2 The control system...........................................................................................36
5.3 RS232 control interface....................................................................................41
5.4 The feedback system........................................................................................42
6 Connector pin-outs..................................................................................................47
6.1 Sensor and control unit pin output.................................................................47
6.2 Sensor output (“D”-type connector option).....................................................48
6.3 Sensor output (waterproof connector option).................................................49
6.4 Breakout box POWER connector......................................................................50
7 Specifications..........................................................................................................51
8 Revision history.......................................................................................................53
2 Issue N