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High Impedance Module for DAS1800

High Impedance Module for the DAS1800. 
Measures: Voltage, current (shunt), temperature (thermocouple), frequency, PWM, TRMS

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Description

High Impedance Module for DAS1800

High Impedance 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 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 10 MΩ for ranges ≥ ± 1 V, 25 MΩ for ranges ≤ ± 0.5 mV
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 < 0.05%
CMRR ≤ ± 500 mV > 85 dB
≥ ± 1 V > 70 dB
Crosstalk > -90 dB
Isolation CH to CH and CH to GND, > 100 MΩ at 650 VDC
Safety CAT III 600 V

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

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
  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

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 Δt

 

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) 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

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