SI-H Muscle Testers
36
WORLD PRECISION IN STRU MENTS
Display Laser Diffraction Pattern on an Oscilloscope
1. In order to display the laser diffraction pattern on an oscilloscope connect the
Sync
BNC connector with the external trigger input of an oscilloscope. The trigger signal is
5.0V. It jumps high when the scan begins.
Fig. 36 The top trace shows the timing reference to the video. The camera signal is shown in
the bottom trace.
2. Adjust the trigger level on the oscilloscope.
3. Connect
the
Video
BNC connector to the analog input of the oscilloscope.
4. Set the time scale of the oscilloscope to display the desired portion of the video sig-
nal. The scan of the photodiodes lasts 1ms in 1KHz mode or 3.8ms in 263Hz mode.
NOTE
: If the scanned signal is less than 1.0V, the sarcomere length may be incorrectly
calculated.
NOTE
: If no oscilloscope is available, view the signal amplitude by pressing the
Display
button. Adjust the amplitude by adjusting the
Laser Power
knob.
If the laser pattern becomes weak compared to the background (peak height less than
twice the maximum background), then check the quality of the laser pattern with an
oscilloscope as described above.
Using the Temperature Control Module
Understanding the Display
The default display is two lines and shows the temperature of both channels. If you
prefer, you may display information from a single channel, either Channel 1 or Channel 2.
CH 1 = 36.9
º
C OK
ј
CH2 = 37.0
º
C OK
Channel 1 Information
Channel 2 Information
Live Temperature Readout
Alarm State
Heating/Cooling Indicator
Fig. 37 Two Channel display mode provides live data on both channels.
CH 1 Temp 36.9
º
C
** OK **
ј
Channel 1 Information
Live Temperature Readout
Alarm State
Heating Indicator
Fig. 38 One channel display mode provides live data on a single channel.
Live Temperature Readout
–The temperature of the cuvette connected to Channel 1
displays in the fi rst line, and the Channel 2 cuvette temperature appears in the second
line.
