Reftek 151D User Manual page 24

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 step calibration sensor response will look like the below figure, The 180
outputs both a positive step and a negative step of the specified amplitude
hence the positive step response and the negative step response of the 151D-
120 :
With these calibration parameters, this 151D step response is approximately
6 Volts in amplitude (per step). From the start of the step response until the
point where the signal crosses below the zero point is approximately 85
seconds.
20 Reftek Systems Inc.