High Speed Modular Data Acquisition System
DAS1800
7
bkprecision.com
sefram.com
Specifications, measurement Modules
Note: All specifications apply to the unit after a temperature stabilization time of 30 minutes over an ambient temperature range of 23 °C ± 5 °C.
Universal Module
(D18-UNI4)
Number of Channels
4
Input Type
Isolated single ended input - 4mm Banana Plug
Voltage
Max. Input Voltage
± 600 VDC or 424 Vrms
Range
19 Ranges:
± 500 μV / 1 mV / 2.5 mV / 5 mV / 10 mV / 25 mV /
50 mV / 100 mV / 250 mV / 500 mV / 1 V / 2.5 V /
5 V / 10 V / 25 V / 50 V / 100 V / 250 V / 600 V
DC Accuracy
1
≤
± 25 mV
± 0.1% of full range + 10 μV
2
± 25 mV to ± 500 mV
± 0.1% of full range + 10 μV
≥
± 1 V
± 0.06% of full range
Offset Drift
± 50 ppm/°C ± 1 μV/°C
Input Impedance
1 M
Ω
for ranges
≥
± 1 V, 25 M
Ω
for ranges
≤
± 0.5 V
Input Capacitance
150 pF
Intrinsic Noise
3
(standard deviation in
% of the span)
≤
± 1 mV
< 0.2%
± 2.5 mV to ± 10 mV
< 0.1%
± 25 mV to ± 500 mV
< 0.05%
≥
± 1 V
< 0.02%
CMRR
≤
± 500 mV
> 85 dB
≥
± 1 V
> 70 dB
Crosstalk
> -90 dB
Isolation
CH to CH and CH to GND, > 100 M
Ω
at 650 VDC
Safety
CAT III 600 V
Bandwidth and Filters
Bandwidth
(-3 dB)
≤
± 2.5 mV
1 kHz
± 5 mV to ± 25 mV
10 kHz
± 50 mV to ± 500 mV
60 kHz
≥
± 1 V
100 kHz
Analog Filter
2nd Order(-20 dB/dec)
100 Hz, 1 kHz, 10 kHz
Digital Filter
IIR 4th order (-80 dB/dec)
0.01 Hz to 10 kHz
Type
Low-pass
Filter
Butterworth
Data Acquisition
ADC
16 bit – SAR
Sampling Interval
1 μs (1 MSa/s) each channel
Temperature (Thermocouple)
Compute Frequency
4 ms
Cold Junction
Uncompensated, internal, external (other channel)
Accuracy
4
: ± 1.25°C
Type
J
-210 °C to 1200 °C (-346 °F to 2192 °F)
K
-250 °C to 1370 °C (-418 °F to 2498 °F)
T
-200 °C to 400 °C (-328 °F to 752 °F)
S
-50 °C to 1760 °C (-58 °F to 3200 °F)
B
200 °C to 1820 °C (392 °F to 3308 °F)
E
-250 °C to 1000 °C (-418 °F to 1832 °F)
N
-250 °C to 1300 °C (-418 °F to 2372 °F)
R
-50°C to 1768°C (-58 °F to 3214 °F)
Time and Counting
Threshold
Set by user, auto
Duty Cycle
10% minimum – (minimum pulse width, 20 μs)
Counter
48 bits
Frequency
0.1 Hz to 100 kHz
Accuracy:
0.01% reading, 0.1 Hz to 10 Hz
0.05% reading, 10 Hz to 100 kHz
PWM
Absolute error:
0.1% from 0.1 Hz to 1 kHz
0.5% from 1 kHz to 5 kHz
TRMS
Compute Period
Compute on the 1 Ms/s data flow
Each period until 100 Hz
10 ms between 100 Hz and 10 kHz
Accuracy
(Sine wave
≥
1 V)
10 Hz to 2 kHz
± 0.1% of full range
2 kHz to 10 kHz
± 0.3% of full range
Other
Current
Through shunt or clamp
Sensor
0 to 10 V, 4 to 20 mA (with external shunt), duty cycle
or frequency sensor, other user defined settings
Calculations
Min – max – avg on
Δ
t
(1) Direct measure taken on DMM at 10 (50 Hz) / 12 (60 Hz) NLPC (200 ms) and full
bandwidth
(2) Only when offset adjustment has been performed after installing a new module. Otherwise
accuracy is ± 0.1% of full range + 20 μV
(3) Measure ± short circuit termination to 50
Ω
on chassis during 1 sec at the fastest
acquisition speed and full bandwidth
(4) Only when cold junction adjustment has been performed after installing a new module.
Otherwise accuracy is ±3 °C
(5) For all other specs, refer to the universal module specifications
High Impedance Module
5
(D18-HIZ4)
Voltage
Input Impedance
10 M
Ω
for ranges
≥
± 1 V, 25 M
Ω
for ranges
≤
± 0.5 mV
Intrinsic Noise
3
(standard deviation in
% of the span)
≤
± 1 mV
< 0.2%
± 2.5 mV to ± 10 mV
< 0.1%
± 25 mV to ± 500 mV
< 0.05%
≥
± 1 V
< 0.05%
Bandwidth and Filters
Bandwidth
≤
± 2.5 mV
1 kHz
± 5 mV to ± 25 mV
10 kHz
± 50 mV to ± 500 mV
60 kHz
≥
± 1 V to ± 10 V
20 kHz
≥
± 25 V
80 kHz