Guralp Systems CMG-DM24S12AMS - Manual (Page 60)

CMG-DM24S12AMS Operator's guide
5.2 Installing CMG-5U sensors
Unpacking and packing
The 5U accelerometer is delivered in a single cardboard box with foam
rubber lining. The packaging is specifically designed for the 5U and
should be reused whenever you need to transport the sensor. Please
note any damage to the packaging when you receive the equipment,
and unpack on a clean surface. The package should contain:
•
the accelerometer
•
a signal connection cable (if ordered)
•
a suitable connector.
The sensor serial number label can be found on the lid of the sensor. If
you need to request the sensor production history, you will need to
quote either the serial number of the sensor or the works order number,
which is also provided on the calibration sheet.
Initial testing
To test the 5U before installation, you will need a power source which
can deliver 100 mA at 10 to 12 V and a digital voltmeter (DVM) with 1
and 10 V ranges. You should never supply more than 12.5 V to the 5U
unit. Also ensure that the supplied cable is connected with the correct
polarity (see the Appendices).
To make it easier to measure the output from the sensor, you can use the
5U handheld control unit or a compromised interface box, which can be
manufactured from a screw clamp connector block. This will simplify
the connections to the appropriate connector pin outputs.
1. Place the 5U sensor on a flat surface with the POSITIVE
ACCELERATION arrow horizontal.
2. Switch on the power supply.
60 Issue B