B+K precision Sefram DAS1800, Руководство пользователя, Страница: 66 / 73

High Speed Modular Data Acquisition System
DAS1800
8 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.
Multiplexed Module (D18-MUX8)
Number of Channels 8
Input Type
Non-isolated differential input – 4 pin terminal block,
Part: Phoenix Contact MC 1.5/ 4-ST-3.5
Voltage
Maximum Input Voltage
± 48 VDC between CH to GND and between
2 poles on a channel
Range
(16 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 / 48 V
Admissible Common
Mode
≤ ± 1 V ± 3 V
≥
± 2.5 V ± 48 V
DC Accuracy 1
≤ ± 10 mV ± 0.1% of full range + 5μV
≥
± 25 mV ± 0.04% of full range
Offset Drift ± 50 ppm/°C ± 0.5 μV/°C
Input Impedance 2 M
Ω
for ranges
≥
± 1 V, 25 M
Ω
for ranges
≤
± 0.5 V
Input Capacitance 150 pF
Intrinsic Noise 2
(standard deviation in%
of the span)
≤
± 1 mV < 0.15%
± 2.5 mV to ± 10 mV < 0.05%
≥ ± 25 mV < 0.01%
CMRR > 70 dB
Crosstalk > -90 dB
Bandwidth and Filters
Bandwidth (-3 dB) 1 kHz
Digital Filter
IIR 4th order (-80 dB/dec) 0.01 Hz to 500 Hz
Type Lowpass
Filter Butterworth
Data Acquisition
ADC 18 bit – SAR
Sampling Interval 200 μs (5 kSa/s) each channel
Temperature (Thermocouple)
Compute Frequency 4 ms
Cold Junction
Uncompensated, internal, external (other channel)
Accuracy
3
: ± 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)
Resistance
Compute Frequency 4 ms
Wiring
2 wires Max. corrective resistance 50 Ω
3 wires Max. 3-wire resistance, 50 Ω
4 wires
Measurement Range
(4 Ranges)
300 Ω (1 mA), 1500 Ω ( 0.5 mA), 5k Ω (0.2 mA),
10 k Ω (0.1 mA)
Accuracy ± 0.1% of the range ± 0.1 Ω
Time and Counting
Threshold Set by user, auto
Minimum Pulse
Width
1 ms
Counter 32 bits
Other
Current Through shunt or clamp
Sensor
0 to 10 V, 4 to 20 mA (with external shunt), other user
defined settings
Temperature (RTD)
Compute Frequency 4 ms
Current
Pt100 1.0 mA
Pt200 0.5 mA
Pt500 0.2 mA
Pt1000 0.1 mA
Temperature Range -200 °C to +850 °C (-328 °F to 1562 °F )
Wiring
2 wires Max. corrective resistance 50 Ω
3 wires Max. 3-wire resistance, 50
Ω
4 wires
Measurement Range
(7 Ranges)
± 10 °C, ± 25 °C, ± 65 °C, ± 130 °C, ± 200 °C,
[-200 °C, +380 °C], [-200 °C, +850 °C]
Accuracy
3 wires 0.1% of the range ± 0.3 °C
4 wires ± 0.1% of the range ± 0.2 °C
(1) Direct measure taken on DMM at 10 (50 Hz) / 12 (60 Hz) NLPC (200 ms) and full
bandwidth
(2) Measure ± short circuit termination to 50
Ω on chassis during 1 sec at the fastest
acquisition speed and full bandwidth
(3) Only when cold junction adjustment has been performed after installing a new module.
Otherwise accuracy is ±3 °C