Hi Folks,   I have used DataQ194 ad converters, and 158.   Big price =
differences so I use more of the 194.

Mostly they work fine.   However from time to time a system will have =
negative clipping, nothing below zero, unless you jump close to the =
machine and then is shows negative values.

We installed a new system, in a school three hours away.    They =
recorded their first earthquake, but because of the clipping the data is =
useless.   It carrys over into Winquake and filtering does nothing to =
improve it.

I had a similar problem, changed the 194, and install a 158 the problem =
went away.   Reinstalled the 194, the problem returned.   I wanted to =
try a new 194, but did not have one.

Can anyone help........Have you see something similar?....could it be =
the set up procedure in Windata, which comes with the 194.   It has a =
set up window for values, and should be set to +10 volts and -10 volts.

I don't think it is the sensor.
I don't think it is Amaseis or Winquake.
I don't think it is the computer.
I don't think it is the cables......








Hi Folks,   I have used =
DataQ194 ad=20
converters, and 158.   Big price differences so I use more of =
the=20
194.
 
Mostly they work fine.   =
However from=20
time to time a system will have negative clipping, nothing below zero, =
unless=20
you jump close to the machine and then is shows negative =
values.
 
We installed a new system, in a school =
three hours=20
away.    They recorded their first earthquake, but =
because of the=20
clipping the data is useless.   It carrys over into Winquake =
and=20
filtering does nothing to improve it.
 
I had a similar problem, changed the =
194, and=20
install a 158 the problem went away.   Reinstalled the 194, =
the=20
problem returned.   I wanted to try a new 194, but did not =
have=20
one.
 
Can anyone help........Have you see =
something=20
similar?....could it be the set up procedure in Windata, which comes =
with the=20
194.   It has a set up window for values, and should be set to =
+10=20
volts and -10 volts.
 
I don't think it is the =
sensor.
I don't think it is Amaseis or=20
Winquake.
I don't think it is the =
computer.
I don't think it is the =
cables......
 
Thanks, Ted