Wouter van Reeven added a comment - 08/Mar/23 11:02 AM - edited A successful connection was made to the TEA accelerometers using python. Data was read from all accelerometers as well. from labjack import ljm   min_frequency = 0 max_frequency = 100 num_frequencies = 200 num_frequencies_from_0 = round( num_frequencies * max_frequency / (max_frequency - min_frequency) ) num_samples = num_frequencies_from_0 * 2 - 2 modbus_addresses = [ 2 , 4 , 6 , 8 , 10 , 12 , 14 , 16 , 18 , 20 , 22 , 24 ] input_channel_names = [f "AIN{addr//2}" for addr in modbus_addresses] desired_sampling_frequency = 2 * max_frequency   print( "Creating handle." ) handle = ljm.openS( "T7" , "TCP" , "139.229.178.63" )   print( "Reading names." ) values = ljm.eReadNames(handle, len(input_channel_names), input_channel_names) print(values)   print( "Starting stream." ) actual_sampling_frequency = ljm.eStreamStart( handle, num_samples, len(modbus_addresses), modbus_addresses, desired_sampling_frequency, ) desired_sampling_frequency = 2 * max_frequency print(f "{desired_sampling_frequency=}, {actual_sampling_frequency=}" )   print( "Reading stream." ) data, log1, log2 = ljm.eStreamRead(handle) print(f "{data}, {log1}, {log2}" )   print( "Disconnecting." ) ljm.eStreamStop(handle) Now I need to find out how to configure this new LabJack device, notably how to get the offsets and scales.

Russell Owen added a comment - 10/Mar/23 9:44 PM - edited See SUMMIT-6894 for information on where things are mounted. I have attached the calibration certificates for the 4 accelerometers: -X Side (Serial number A435784) +X Side (Serial number A435781) Spider Spindle (Serial number A435788) M2 (Serial number A435804) The pin assignments are as follows, according to SUMMIT-7240: A0 to A2 - Leg -x sensor A3 to A5 - Leg +x sensor A6 to A8 - TEA sensor A9 to A11 - M2 surrogate sensor

Russell Owen added a comment - 10/Mar/23 10:35 PM I decided it was safest to use a new ESS instance to read this data (salIndex=104) because the data is read at about 200 Hz and it's 12 numbers per read (3 channels from 4 accelerometers). I also added a new scripts directory containing a script to convert accelerometer calibration data to configuration, and saved the data for these new M2 accelerometers. Pull request: https://github.com/lsst-ts/ts_config_ocs/pull/157

Wouter van Reeven added a comment - 13/Mar/23 1:05 PM I approved the ts_config_ocs PR on GitHub.

Russell Owen added a comment - 13/Mar/23 6:56 PM We have decided to run the code with a tag on the ticket before merging, to make sure it works.

Russell Owen added a comment - 13/Mar/23 6:58 PM Reviewed on github

Russell Owen added a comment - 13/Mar/23 9:11 PM Tested and merged