Calibrating the 3ESP
2.
Select the calibration channel corresponding to the instrument, and choose
Broadband Noise.
Select the component you wish to calibrate, together with a
suitable duration and amplitude, and click
Inject now
. A new data stream,
ending
C
n
(
n
= 0 – 7) or
MB
, should appear in Scream!'s main window containing
the returned calibration signal.
3.
Open a
Waveview
window on the calibration signal and the returned streams
by selecting them and double-clicking. The streams should display the
calibration signal combined with the sensors' own measurements. If you
cannot see the calibration signal, zoom into the
Waveview
using the scaling
icons at the top left of the window or the cursor keys.
4.
Drag the calibration stream
C
n
across the
Waveview
window, so that it is at the
top.
5.
If the returning signal is saturated, retry using a calibration signal with lower
amplitude, until the entire curve is visible in the
Waveview
window.
6.
If you need to scale one, but not another, of the traces, right-click on the trace
and select
Scale...
. You can then type in a suitable scale factor for that trace.
23
Issue G - February 2016
