Reftek 151D User Manual page 22

Rev A REF TEK 151D Broadband Seismometer Users Guide 12/4/2023
151D-UG
To send the signal go the Control>Sensor Menu. Select the relevant
channels and then click Manual Calibrate to send the signal. If the signal is
active the Channel Status will read Calibrating (Manual).
The 151D upon receiving the calibration signal will switch to UVW output mode
automatically. This can appear as a shift in the data.
The Sin calibration output will look like the below figure:
As the sensors mass is still oscillating from external longer period movements
as well, select a single sine period to evaluate the amplitude on a per channel
basis.
18 Reftek Systems Inc.