Sefram DAS1820 Portable High-Speed Data Acquisition System

Description

DAS1820 Portable High-Speed Data Acquisition System

The DAS1820 is a cutting-edge, portable high-speed data acquisition system equipped with a compact dual-slot chassis. It utilises the same robust hardware architecture and module ecosystem as the larger DAS1800, ensuring exceptional performance in a more streamlined design. This shared platform empowers users with plug-and-play functionality, enabling quick module reconfiguration without the hassle of factory recalibration.

Modules

For high-speed measurements, the D18-UNI4 and D18-HVM4 modules deliver simultaneous sampling at impressive rates of up to 1 MSa/s. The HVM4 module is engineered for high-voltage measurements, capable of handling up to ±1500 VDC or 1000 Vrms. Moreover, the D18-MUX8 is available for capturing slower trends with its eight multiplexed channels. With an internal 500 GB solid-state drive and an optional battery offering up to four hours of field operation, this instrument guarantees long-duration recording even in the most remote locations.

	Universal	High Impedance	High Voltage	Multiplexed
Channels	4	4	4	8
Maximum Voltage	± 600 VDC	± 600 VDC	± 1500 VDC	± 48 VDC
RMS Voltage	424 VRMS	424 VRMS	1000 VRMS	–
Resolution	16 bit	16 bit	16 bit	18 bit
Sampling Rate	1 MSa/s/ch	1 MSa/s/ch	1 MSa/s/ch	5 kSa/s
Input Impedance	1 MΩ	10 MΩ	10 MΩ	2 MΩ
Input Type	Single Ended	Single Ended	Differential	Differential
Isolation	√	√	√	–
Voltage	√	√	√	√
Current	√	√	√	√
Thermocouples	√	√	–	√
RTDs	–	–	–	√
Frequency	√	√	√	–
Counter	√	√	√	√
PWM	√	√	√	–

Operation and Software

The DAS1820 software environment is designed for maximum efficiency and advanced analysis. Users can configure up to three different sampling rates, enabling the recording of single or multiple files simultaneously. The system excels in complex power analysis for DC, single-phase, and three-phase systems (50 Hz, 60 Hz, and 400 Hz), alongside custom script channels for real-time calculations across multiple channels.

Interact with your data seamlessly through the integrated 12-inch HD touchscreen, which supports intuitive gestures like pinch-to-zoom for real-time waveforms, phasor diagrams, and histograms. Additionally, the DAS1820 offers remote control capabilities via a web server or VNC and comes with complimentary DASpro software for PC-based data viewing.

Product Features

2 slots and 4 measurement modules available
- Universal (4 ch)
- Multiplexed (8 ch)
- High Impedance (4 ch)
- High Voltage (4 ch)
Measure up to ± 1500 VDC
Up to 16 analogue inputs with D18-MUX8 multiplexed module
Temperature measurements with thermocouples and RTDs
Onboard scripting for real-time single or multichannel calculations
Max sampling rate of 1 MSa/s/ch (up to 8 channels)
Memory efficient acquisition with simultaneous sampling at different rates (up to 3) and independent file recording (up to 3)
Synchronize timing with IRIG, GPS, and PTP (DAS1820-SYNC model)
Dedicated power analysis supports DC, single-phase, and 3-phase networks operating in 50 Hz, 60 Hz, or 400 Hz
Dedicated sensor library to store and recall sensor information
12” HD touchscreen display
Data visuals include real-time waveforms, numeric values, phasor diagrams, and histogram charts
500 GB internal SSD (standard)
Battery option (D1820-BAT) provides up to 4 hours of operation
Interfaces include USB 3.0 (x2), and LAN 1 Gbps

Applications

Monitoring and verifying power systems
Monitoring of processes and equipment
Product validation and verification

DAS1820 Base Unit

Note: All specifications apply to the unit after a temperature stabilization time of 60 minutes over an ambient temperature range of 23 °C ± 5 °C.

Data Acquisition System
Recording (files written to SSD)
Max Sampling Rate *1	1 MSa/s up to 8 channels
Recording Groups	3
Write Speed	50 MB/s
File Format	ASAM MDF4 (.mf4)
File Size Limit	90% of disk capacity
At End of Acquisition	Notify, re-arm trigger
Markers	On user action, On event
Real Time Measure
Display Mode	F(t)	Roll mode: 100 ms/div to 10 min/div Scope mode: 10 μs/div to 50 ms/div
	DMM	Acquisition time: 200ms (10 NPLC 2 at 50Hz), 2s (100 NPLC 2 at 50Hz Display mode: Bar graph, reduce, MIN/MAX
	Record Live View	Typical Refresh period 2s, Zoom Mode
	Phasor Diagram	Data sampled at 10 kHz Vector amplitude based on RMS value
	Histogram	50 Hz to 60 Hz: 1 to 50 harmonics 400 Hz: 1 to 10 harmonics
	Custom	Customize up to 10 dashboards with unique widget arrangements Widgets: F(t), Record Live F(t), DMM, Phasor diagrams, Histogram, Images
File Viewer
Open File Time (typical)	10 sec per 100 GB of file *3
Subplot	16
Cursors	Horizontal, Vertical
Measurements	On the data displayed or between cursors Min, Max, Pk to Pk, Frequency, RMS, Rising time
Trigger System
Compute Period	1 µs
Source	Analogue and logic channel, external source, manual, date/ time, delay (on start), duration (on stop), AND/OR combination of channels (128 max)
On Analogue Channel	Edge (rising, falling, both), Threshold (above, below), windows (in, out)
Pre-trigger	128 M samples
Post-trigger	1000 s maximum

*1 For D18-UNI4 and D18-HIZ4 Module
*2 NPLC: Number of power line cycles
*3 Time with only the 1st frequency group used

Digital I/O
Input
Number of Channels	16
Max Voltage	24 V
Threshold	1.2 V to 2.8 V
Sampling Interval	1 μs (1 MSa/s) each channel
Output
Number of Channels	4
Output Characteristics	TTL 5 V, 10 mA
Trigger Source	Analogue / Digital channels, acquisition start / stop, disk full
Power Supply *4	+ 12 V ± 5 %, 200 mA

*4 Used to power the isolated digital input board

Synchronisation
Sync and Trigger I/O (SUB-D 15 HD Connector)
Input	Signal Level	TTL 3.3 V
	External Trigger	Pull-up resistor: 10 kΩ, Rising edge sensitive Minimum pulse width: 100 μs
	External Start / Stop	Pull-up resistor: 10 kΩ, Rising edge sensitive for start Falling edge sensitive for stop Minimum pulse width: 500 ms
Output	Signal Level	TTL 3.3 V
	Trigger	1 ms positive pulse at trig event
	Start / Stop	Set when record is launched
	Sampling	Clock with 50%duty cycle at the frequency of the fastest recorded group
	PPS	100ms pulse each second base on the main clock of the unit
IRIG and GPS (option)
IRIG / GPS Input	IRIG format B122/B126 Time error between reference clock and acquisition clock, < ± 10 μs
PTP (option)
Ethernet PTPV2 IEEE1588	Time error between reference clock and acquisition clock, < ± 10 μs

Software Feature
Remote Access	VNC for remote monitoring and control Web Server
	Event Notify	Email
	File Management	FTP NAS (Network storage for file backup)
	Bench Automation	SCPI command port (23 or 5025)
Storage Management	Cleaning policy option for automatically removing old files after exceeding a specific number of files or a date
Sensor Library	Predefined sensors and user created
Date and Time	Manual, NTP
Software Update	Through web or USB
Languages	English, French, Portuguese, Chinese, Spanish, German

Power Analysis
General
Network Type		DC; AC: Single-phase (1U/1I), 3-phase delta (3U/3I), 3-phase Wye in 3-wire (3U/3I) and 4-wire (4U/4I)
Network Frequency		DC, 50Hz, 60Hz, 400Hz
Sampling Rate		10 kHz
Number of Networks		5
Compatible Modules		D18-UNIV4 & D18-HVM4 & D18-HIZ4
Record File		MDF4
Calculation Interval
Network Frequency	1st Interval	2nd Interval	3rd Interval	4th Interval	5th Interval (custom)
DC	200 ms	3 s	10 min	2 hr	1 ms to 100 ms
50 Hz	10 periods	150 periods	10 min	2 hr	1-2-5 period
60 Hz	12 periods	180 periods	10 min	2 hr	1-2-5 period
400 Hz	80 periods	1200 periods	10 min	2 hr	1-2-5-10-20-40 period
DC Measurements
Voltage		Mean, Max, Min, peak-to-peak			0.1% Udin *5
Current		Mean, Max, Min, peak-to-peak			0.1% Idin *6
Power		Active			0.1% Pdin *7
Energy		Active			-
AC Measurements
Voltage		Mean, True RMS, Max, Min, peak-to-peak, Crest factor			0.1% Udin *5
		Phase to ref channel			± 0.5˚
Current		Mean, True RMS, Max, Min, peak-to-peak, Crest factor			0.1% Idin *6
		Phase			± 0.5˚
		K Factor			0.1%
Power		Active, Reactive, Apparent			0.1% Pdin *7
Power Quality		cos (Ф)			± 0.01
		tan (Ф)			-
		Ф			± 0.5˚
		PF			± 0.001
		THD			1.0%
Energy		Active, Reactive			-
Voltage Harmonics		50 Hz, 60 Hz: 1 to 50 harmonics			0.1% Udin *5
		400 Hz: 1 to 10 harmonics
Current Harmonics		50 Hz, 60 Hz: 1 to 50 harmonics			0.1% Idin *6
		400 Hz: 1 to 10 harmonics

*5 : Udin - Nominal network voltage
*6 : Idin - Nominal network current
*7 : Pdin - Nominal network power (Udin*Idin)

General
Internal Solid State Memory	SSD 3D NAND Flash - 500GB
Operating Temperature	0 °C to 40 °C
Storage Temperature	-20 °C to 60 °C
Display	12" HD touchscreen (1200 x 800)
Power Supply	110 VAC to 240 VAC, 50 - 60 Hz (75VA max)
Interfaces	USB3.0 (x2) and LAN 1Gbps (x1)
Battery (optional)	Removable, Lithium-ion - 10.8 V, 75 Wh
Battery Life (typical)	4 hrs - One Module D18-UNI4 installed 3.5 hrs - Two Module D18-UNI4 installed
Weight	5 kg - Two Module installed + Battery option 4.5 kg - One Module installed + Battery option
Safety	Low Voltage Directive (LVD) 2014/35/EU EN 61010-2010+A1:2019, EN 61010-2-030 (2021+A11/2021)
Electromagnetic Compatibility	EMC directive 2014/53/EU, EN IEC 61326-2-1 (2021) EN IEC 61326-1 (2021), EN 61000-3-2 (2019+A1/2021) EN 61000-3-3 (2013+A1/2019)
Dimensions (W x H x D)	400 x 245 x 120 mm
Warranty	Base unit and modules: 3 years Battery (D1820-BAT): 1 year
Supplied Accessories	Power cord, SUB-D 25 pin male connector and back shell, SUB-D 15 pin male connector and back shell, rugged carrying case
Languages	English, French, German, Spanish, Portuguese, Chinese

DAS1820 Specifications

DAS1820 User Manual

Data Acquisition Selection Guide - B&K Precision

UK Supplier of Data Acquisition & Thermal Imaging systems, software and services

DAS1820 Portable High-Speed Data Acquisition System