Guralp Systems CMG-3TB - Manual (Page 20)

CMG-3TB
Connections
The HCU provides
•
two identical 26-pin connectors for attaching to the HCU or
RECORDER connectors of the breakout box, and
•
a 10-pin connector through which you can power the
instrument, if desired. The power pins on this connector are
directly connected to those on the
SENSOR POWER connector
of the breakout box. When using this alternative power
connection, you should ensure you do not inadvertently connect
two power supplies together.
Signal meter
The upper section of the HCU contains a simple voltmeter for
monitoring various signals from the instrument.
•
To monitor the velocity outputs, switch the dial to V, N/S or
E/W VEL according to the component you want to monitor.
•
To monitor the mass position outputs, switch the dial to V, N/S
or E/W MASS POS according to the component you want to
monitor.
20 Issue C