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Frequency Response Characteristics
Use the 10Hz LP lowpass filter for connecting the DA100C to most pressure, force, and strain transducers (i.e.,
TSD104A, TSD105A, TSD120, TSD121C, TSD125 Series, and TSD130 Series).
Use the 300Hz LP lowpass filter for connecting the DA100C to devices with higher frequency output signals (i.e.,
TSD107B, TSD108, TSD117).
Use the 5,000Hz LP lowpass filter for connecting the DA100C to devices with the highest frequency signals, such
as microphones and clamp signals (patch, voltage or current).
See the sample frequency response plots beginning on page
241: 10Hz LP, 300Hz LP, 5000Hz LP
DA100C Calibration
A. Reference calibration
B. Amplifier gain calibration
C. Transducer calibration if applying physical variable
D. Transducer calibration if not applying physical variable
A. Reference Calibration
The REFCAL (see page 47) is used to check the reference voltage of the DA100C. The ref voltage is used to
provide excitation to passive transducers.
B. Amplifier Gain Calibration
Use the CBLCAL/C.
C. Transducer Calibration if applying physical variable
1. Plug transducer it into the DA100C.
2. Set the gain switch on the DA100C to the desired level.
3. Apply the physical variable to the transducer on the low end of your expected range.
4. Press on Cal 1 in the scaling window in AcqKnowledge.
5. Apply the physical variable to the transducer on the high end of your expected range.
6. Press on Cal 2 in the scaling window in AcqKnowledge.
7. Review the Input Voltage differential (provided in the scaling window as a consequence of pressing cal
1/cal2) and adjust if necessary
If the Input Voltage differential is less than +/- 100 mV it may be appropriate to increase the gain
setting on the DA100C.
If either Input Voltage signal is higher than 9.9V or less than –9.9V, then reduce the gain setting on the
DA100C.
If you adjust the Gain switch setting on the DA100C, then you will need to repeat steps 3-7.
The physical variable for calibration varies based on the transducer type. See the appropriate transducer
specification for details:
T
RANSDUCER TYPE TRANSDUCER TYPE
TSD104A Precision Pressure TSD121C Hand Dynamometer
TSD105A Variable Range Force TSD125 Series Fixed Range Force
TSD107B High Flow Pneumotach TSD127 Low Flow Pneumotach
TSD108 Physiological Microphone TSD130 Series Goniometers & Torsiometers
TSD117 Medium Flow Pneumotach TSD137 Series Very Low Flow Pneumotach
TSD120 Noninvasive BP cuff TSD160 Series Differential Pressure
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