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Multiplexed Module for DAS1800

Multiplexed Module for the DAS1800. 
8 Channels.
Measures: Voltage, current (shunt), resistance, temperature (RTD), temperature (thermocouple).

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Description

Multiplexed Module for DAS1800

Multiplexed Module for DAS1800 from B&K Precision and Sefram Instruments.

Configure the DAS1800 to fit your needs with any combination of modules up to 10.

Module Comparison
  Universal High Impedance Multiplexed
Channels 4 4 8
Maximum Voltage ± 600 VDC ± 600 VDC ± 48 VDC
RMS Voltage 424 VRMS 424 VRMS
Resolution 16 bit 16 bit 18 bit
Sampling Rate 1 MSa/s/ch 1 MSa/s/ch 5 kSa/s
Input Impedance 1 MΩ 10 MΩ 2 MΩ
Input Type Single ended Single ended Differential
Isolation Yes Yes No
Voltage Yes Yes Yes
Current Yes Yes Yes
Thermocouples Yes Yes Yes
RTDs No No Yes
Frequency Yes Yes No
Counter Yes Yes Yes
PWM Yes Yes No

 

 

 

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

Max. 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 MΩ for ranges ≥ ± 1 V, 25 MΩ 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 Low-pass
Filter Butterworth

Data Acquisition

ADC 18 bit – SAR
Sampling Interval 200 µs (5 kSa/s) each channel

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
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

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
K -250 °C to 1370 °C
T -200 °C to 400 °C
S -50 °C to 1760 °C
B 200 °C to 1820 °C
E -250 °C to 1000 °C
N -250 °C to 1300 °C
R -50°C to 1768°C

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 kΩ (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

 

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.

(*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

DAS1800 High Speed Modular System Specifications DAS1800 High Speed Modular System Specifications