Measurement Computing WebDAQ 504 User Manual

WebDAQ 504 User's Guide Specifications
21
Parameter Condition Specification
Crosstalk
1 kHz
–110 dB
CMRR f
in
≤ 1 kHz
40 dB min
47 dB typ
SFDR
f
in
= 1 kHz, –60 dBFS
120 dB
Input impedance
Differential 305 kΩ
AI– (shield) to chassis ground
50 Ω
Note 1: If you are using an IEPE sensor, use this equation to make sure your configuration meets the IEPE compliance
voltage range
(V
commo n-mode
+ V
bias
± V
full-scale
) must be 0 to 19, where
V
commo n-mode
is the common-mode voltage applied to the WebDAQ 504.
V
bias
is the bias voltage of the IEPE sensor.
V
full-scale
is the full-scale voltage of the IEPE sensor.
Table 2. Measurement accuracy specifications
Measurement Conditions
Percent of Reading
(Gain Error)
Percent of Range
(Offset Error) Note 2
Calibrated
Maximum
(0 °C to 50 °C)
±0.34% (±0.03 dB)
±0.14% (±7.1 mV)
Typical
(25 °C ±5 °C
±0.07% (±0.006 dB)
±0.01% (±0.5mV)
Note 2: Range = 5.1 V
pk
.
Table 3. Idle channel and noise density specifications
Idle Channel 51.2 kS/s 25.6 kS/s 2.048 kS/s
Noise
97 dBFS
99 dBFS
103 dBFS
50 µV
rms
40 µV
rms
25 µV
rms
Noise density
310 nV/√Hz
350 nV/√Hz
780 nV/√Hz
Table 4. Total harmonic distortion (THD) specifications
Input Amplitude Condition Specification
Input amplitude
–1 dBFS
1 kHz: –95 dB
8 kHz: –87 dB
–20 dBFS
1 kHz: –95 dB
8 kHz: –80 dB
Intermodulation distortion
(–1 dBFS)
DIN 250 Hz/8 kHz
4:1 amplitude ratio
–80 dB
CCIF 11 kHz/12 kHz 1:1 amplitude
ratio
–93 dB
Digital input/output
Table 5. Digital input/output specifications
Parameter Specification
Digital type CMOS (Schmitt trigger) input / open drain output
Number of I/O
One port of 4 bits
Configuration
Each bit can be independently configured for input or output
Power on conditions
Power on reset is input mode
Pull-up configuration
Each bit is pulled up to 5 V with a 100 kΩ resistor
Input frequency range DC – 10 kHz (Note 3)
Input high voltage threshold
1.9 V min, 3.6 V max
Input low voltage threshold
2.3 V max, 1.0 V min
Schmitt trigger hysteresis
0.6 V min, 1.7 V max

Measurement Computing WebDAQ 504 Specifications

General

Brand	Measurement Computing
Model	WebDAQ 504
Category	Data Loggers
Language	English