Refraction Technology 130-01, Operation Manual

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Doc-1301-Ops Rev 2.9.1 10/30/08
Refraction Technology, Inc. 89
5.3.2 Sensor Test Signals
Sensors vary in the number and type of signals they support. The following
table shows some common sensors used with the Ref Tek 130-01:
Sensor Mass Center CalSig CalEn Notes
Outputs Inputs Inputs Inputs
131A - - - 1 ( +5v ) Self-test output while enabled
LE3Dlite - - - 1 (GND) Fixed self-test starts on falling
edge
L4C - - 1 -
S13 - - 1 -
CMG-3ESP 3 1 (GND) 1 3 (GND) Center enable > 0.2 S
CMG-3T 3 1 (GND) 1 3 (GND) Center enable > 0.2 S
CMG-40T 3 - 1 3 (GND)
STS 3 1 ( +5v ) 3 1 ( +5v ) Center enable > 0.5 S
5.3.3 Auxiliary Channels
Three auxiliary channels are provided on each sensor connector. Each
channel connects to a 12-bit A/D converter with an input range of +/- 10v.
These channels are read once per second and stored as left-justified, 2’s-
compliment, 16-bit values. This equates to a bit-weight of 305.2 uV. These
channels can be used to measure mass position or other auxiliary input data,
such as temperature and wind speed. The current readings of the auxiliary
channels are available on demand using the Auxiliary Data status response
(SS:AD).
Mass re-center
Mass re-centering can be performed on-demand. The Sensor Calibration –
Mass re-center (SK:M) command forces activation of the Center pins of a
specified sensor for 1-2 seconds. Automatic re-centering is enabled using the
PQ parameters. This assumes that the auxiliary input channels are
connected to the mass position outputs of a sensor.