Annex
9173B_002-286e-07.10
Page
35
Threshold
Largest change in the measurand that produces a measur-
able change in the sensor output, while the change of the
measurand takes place slowly and monotonically.
Note: In practice, the rule of thumb applies that the
threshold is about two to three times as large as the typical
noise signal of a charge amplifier. This value can, however,
only be achieved in dynamic measurements, whereas with
quasi-static measurements, drift and environmental influ-
ences are limiting factors
Time constant
The time constant describes the behavior of a high-pass
filter and represents the time after which the signal is re-
duced to 1/e of the output value.
Note: The time constant enables the measuring error to be
estimated in relation to the measuring duration. You will
find detailed information on time constants and sensitivity
ranges in the operating instructions for your charge ampli-
fier.
Example: The time constant depends on the measuring
range selected on the charge amplifier. Possible values vary
from approx. 0,01 s in the most sensitive range to approx.
100 000 s in the least sensitive range. The largest possible
time constant must be selected for quasi-static measure-
ments
Summary of Contents for 9173B
Page 1: ...Instruction Manual SlimLine Force Sensor Type 9173B to 9177B 9173B_002 286e 07 10...
Page 2: ...Instruction Manual SlimLine Force Sensor Type 9173B to 9177B 9173B_002 286e 07 10...
Page 27: ...Calibration and Maintenance 9173B_002 286e 07 10 Page 25 Fig 12 In situ calibration procedure...
