Guralp Systems CMG-40T - Manual (Page 33)

Operator's guide
sensors are given in the next section.
Pin R, Calibration enable, is equivalent to the vertical calibration enable line on
a CMG-3ESP, so you can calibrate all channels by setting up Scream! or a
handheld control unit to calibrate the vertical channel.
Pressing ENABLE and CENTRE on a CMG-3ESP handheld control unit
activates pin U and switches the 40T into 1 second mode. You must do this
before you can monitor mass position outputs, e.g. for offset zeroing.
Appendix A.2 Output port and breakout box RECORDER
connector (high gain option)
These models have a 26-pin mil-spec plug (02E-16-26P) with the following pin
assignments.
Pin Function
A Velocity +ve, vertical channel
B Velocity –ve, vertical channel
C Velocity +ve, N/S channel
D Velocity –ve, N/S channel
E Velocity +ve, E/W channel
F Velocity –ve, E/W channel
G Mass position, vertical channel
H High gain velocity –ve, E/W channel
J Mass position, N/S channel
K High gain velocity +ve, E/W channel
L Mass position, E/W channel
M – 12 V DC supply (3-way power option)
N Signal ground
P Calibration signal (all channels)
R Calibration enable (all channels)
S High gain velocity –ve, vertical channel
T High gain velocity +ve, vertical channel
U Acc/Vel
V N/S centring motor (remote centring option)
W E/W centring motor (remote centring option)
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