3 jumper configuration for high gain operation, 4 reassembly – Guralp Systems CMG-5TD User Manual
Page 12

Setting the gain
4.3
Jumper configuration for high gain operation
Arrange the jumpers as in the picture below:
4.4
Reassembly
Once the desired gain selection has been made, reconnect the ribbon cable
and gently lower the lid onto the instrument, taking care not to knock the
electronic assemblies or snag any cables. Ensure that the lid is rotated to the
correct orientation using the marks you made previously and then gently ease
it over the 'O'-ring seal and into place. Secure using the six small screws and,
finally, replace the large pressure release screw.
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Issue D - April 2013