WebDAQ DT5837
Internet Enabled Vibration/Acoustic Logger

Remote Configuration and Monitoring

Virtually Unlimited Storage

Integrated HW and SW

Flexible Triggers,Alarms, Emails, andSMS Texts

Built-in Web Server,
Easy-to-Use
Simultaneous ADC
Sampling

WebDAQ DT5837
Internet Enabled Vibration/Acoustic Logger
Features• Four simultaneous analog
inputs−− AC/DC coupling−− IEPE excitation current• Real-time FFTs for continuous
monitoring and analysis
The WebDAQ DT5837 intelligent logger features remote monitoring and control of real-time
acoustic and vibration data.

Overview
The WebDAQ DT5837 is a stand-alone, acoustic and vibration logger designed forremote monitoring and control. All the intelligence is built into the WebDAQ,eliminating the need for a PC or additional software. By using the embedded
WebDAQ web server, users can easily configure simple or sophisticated applications,
log vibration data, update digital outputs and/or send notifications based on alarm
conditions, and view real-time data from any location and any device with a webbrowser.
The WebDAQ DT5837 performs high-accuracy measurements from up to four IEPE
(Integrated Electronic Piezoelectric) sensors. Housed in a heavy-duty chassis, theWebDAQ DT5837 is rugged enough for industrial applications such as noise andvibration testing.

Integrated Software andHardware
The WebDAQ Series embedded OS andweb server provides an all-in-one package
for stand-alone data logging and alarming. Users can monitor and control theirapplications from anywhere with a webbrowser.
The WebDAQ web server is optimized
for both desktop and mobile use. Users
can perform data acquisition tasks fromphones, tablets and laptops with a single,
intuitive user interface.

Remote Access and Control
Install the WebDAQ DT5837 on any network and access it using any device witha web browser to remotely monitor andcontrol all operations.

Wireless communication

After the WebDAQ is detected on a wired
network , users can connect an approved
WiFi adapter to the rear panel and communicate with the WebDAQ over a wirelessnetwork. Refer to our website for a list of
the WiFi adapters approved for use with
WebDAQ Series hardware.

• Four isolated DIO for triggers
and alarms• Log data to internal storage ormapped network storage• Share folders to view files overa local network• Configurable read/write access• Convert data to binary or csv• No driver software to install• Built-in web server• Easy, flexible task scheduling• Remote monitoring andcontrol• Alarming and notifications
with email and SMS messaging• Export data to csv, UFF,
or binary for use in otherapplications• WiFi support

Flexible Triggering
Start or stop the acquisition based on
FFT, analog, or digital thresholds, alarmstates, or date/time values. On-demand
push button triggering is also supported.

WebDAQ Web Interface
An embedded web server provides a clean,intuitive interface to access all configuration and data management tasks.
Hardware, trigger and alarm settings arecontained in a single task, or “job”. Multiple “jobs” can be run in a “schedule” formore complex data logging applications.
For example, users can create a scheduleof jobs in which one job automaticallyruns after an alarm condition is triggeredon a different job, such as when a digital
input changes.
Device-independent operation lets you remotely monitor and control the WebDAQ DT5837
from any device with a web browser.
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WebDAQ DT5837
Introduction
Easy Setup – Powerful Capabilities
Jobs are the building block of WebDAQ. The ability to define different data logging jobs, or tasks, and add them to a schedule
unleashes flexibility not seen in any other data logger.
Whether you want to set up a simple logging task or a complex task, jobs and a schedule make it easy and straightforward.

What is a Job?

What is a Schedule?

The basic building block of WebDAQ, a job defines channel
configuration, logging options, start and stop conditions, andalarming.

A schedule is a collection of jobs that gives flexibility to dynamically change data logging attributes, such as sampling rate, active
channels configuration, or alarm levels.

Example:Switching from static acquisition todynamic acquisition.
1 Schedule and 2 Jobs
Users can easily setup a job for a slow,
static acquisition and a fast dynamicacquisition. When a trigger condition
is met (i.e. over/under alarm), Job
1 (slow acquisition) ends and Job 2(fast acquisition) begins. When the trigger
condition returns to normal, Job 1 can berestarted.

Clear, Concise, Data Displays

WebDAQ users don’t need to rely on the small
screens and difficult to navigate displays ofmost other loggers. With WebDAQ’s intuitive
web interface, users can easily see their data
and alarm conditions in real time or after theacquisition is complete.

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WebDAQ DT5837
Features
FFT Display

Alarm and Event Notifications
Create multiple alarms using analog or digital channel sources.
Configure alarms to reset and re-arm when the condition clears,or reset them remotely with your browser. View the alarm statuson the web interface. Receive event and alarm notifications on
one or more addresses using email and SMS messaging.

An FFT is displayed for each active channel in a job on a single
FFT plot. The WebDAQ DT5837 performs a spectrum function
on the time-domain data, and displays the amplitude of thefrequency response. The data is scaled in dB based on the fullscale range of the sensor for that channel.

Store data files and configuration settings locally in internal flash
memory, or save to external media or network folders.

Users can configure the window type to apply to the FFT datafor each channel. The following window types are supported:Hann, Hamming, Blackman-Harris, Blackman, Flattop, or None
(Uniform).

Users can map a network drive or FTP server as the location tolog data or store files.

The peak amplitude and frequency can be shown or hidden,
as desired.

Easily transfer files between WebDAQ storage locations andmapped network storage locations.

FFT Triggering

Virtually Unlimited Storage

An FFT trigger can be used for starting or stopping an acquisition.

Share Folders

Users can configure the channel to use as the FFT trigger source,
the FFT size, and the window type to apply to the FFT data forthe trigger. The following window types are supported for theFFT trigger: Hann, Hamming, Blackman-Harris, Blackman, Flattop, or None (Uniform).

Users can share a WebDAQ storage location or specific folder
over a local network.

Real-Time Data Display
View data as it is acquired or from a stored file. Data can be plotted on strip chart and FFT displays. Users can specify a range ofdata to view. Real-time FFTs allow continuous monitoring andanalysis. Users can apply windowing parameters with software.

The WebDAQ DT5837 performs a Power Spectrum function on
the time-domain data of the selected FFT trigger source.
The power frequency band and the total power in band thresholdlevel to use for the FFT trigger are user-configurable.

Control Read and Write Access

Users can also specify the number of samples to acquire before
the trigger occurs.

Users can control who can view and modify job settings bydefining a password and setting the security level.

Anti-alias Filtering

Run the Schedule on Startup

Built-in anti-alias filters automatically adjust to the sampling rate.
Analog and digital filtering accurately represents in-band andout-of-band signals. Signals within the passband have frequencydependent gain. A stopband filter attenuates all signals above
the stopband frequency.

Automatically run the schedule when the system starts up.
Multiple jobs in the schedule are run consecutively.

Real-Time ClockA real-time clock provides an absolute time reference for timestamping data. The clock can be set to any timezone, and may
be synchronized to the internet time server.

Isolated Digital I/O
The four isolated digital I/O lines can be used either as triggers
to start or stop the acquisition or as alarm outputs.

Simultaneous Sampling

Flexible Power Requirements

The WebDAQ performs simultaneous measurements from up tofour analog inputs at rates of up to 51.2 kS/s per channel. Users
can configure each input for voltage or IEPE sensor measurements.

Provide power with the 12 volt, 1.25 amp supply that ships withthe device*, or connect to any 6 to 16 DC supply.

Sensor Measurements

Firmware Updates

Users can configure IEPE channels to measure acceleration,
sound pressure, velocity, and force. AC coupling is automaticallyenabled for IEPE channels. WebDAQ provides a minimum of 4
mA excitation current and IEPE compliance voltage up to 19 V
to drive internal circuitry. Users can configure voltage channels
for AC or DC coupling.

Device firmware is bundled with the operating system andweb server in one update file. This allows the WebDAQ to be
updated in the field.

Calibration
The WebDAQ is factory-calibrated using a NIST-traceable calibration process. Specifications are guaranteed for one year. Returnthe device to the factory for recalibration.
* Japan only

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WebDAQ DT5837
Functional Block Diagram
Real-time
Clock withBattery

BNC Connectors

Screw Terminals

Buttons/LEDs

44

Isolated
DIO

Sound andVibration
Measurement
ModuleMicroprocessor,
RAM, and FlashSD
Connector

Raspberry Pi
ComputeModuleUSB Huband
10/100 Ethernet
Controller

Dual USB
Connectors

RJ-45
Ethernet
Connector

PowerSupplies

PowerInput
Ext Pwr+9 VDC/1.67 A

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WebDAQ DT5837
Front and Rear Panels
Front Panel
BNC connectors and detachable screw terminals allow quick sensor and digital connections.

Rear Panel
The rear panel provides Ethernet and power connections, LED indicators, dual USB ports, one SD card slot, buttons, and a groundconnector.

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WebDAQ DT5837
Specifications
All specifications are subject to change without notice.
Typical for 0 °C to 50 °C unless otherwise specified.

Total Harmonic Distortion (THD)
Input Amplitude

Analog Input

Number of channels: 4 analog input channels
ADC resolution: 24 bits
Type of ADC: Delta-Sigma (with analog prefiltering)
Sampling mode: SimultaneousInternal master timebase (fM)
Frequency: 13.1072 MHz
Accuracy: ±50 ppm max
Data rate range (fs): 1.652 kS/s min, 51.2 kS/s max. The data rate must remain
within the appropriate data range.
Data rates (fs): (fM ÷ 256)/n, where n = 1, 2, ..., 31.
Input coupling: AC/DC, software-selectable
AC cutoff frequency–3 dB: 0.5 Hz–0.1 dB: 4.6 Hz max
Input range: ±5 VAC voltage full-scale range: ±5 Vpk min, ±5.1 Vpk typ, ±5.2 Vpk max
Common-mode voltage range, AI- to earth ground: ±2 V max
IEPE excitation current; software selectable on/off: 2.0 mA min, 2.1 mA typ
Power-on glitch: 90 μA for 10 μs
IEPE compliance voltage: 19 V max
Overvoltage protection, with respect to chassis ground
Signal source connected to AI+ and AI–:±30 V
Low-impedance source connected to AI+ and AI–: –6 V to 30 V
Input delay: (40 + 5/512)/fs + 2.6 μs
Gain drift: 0.14 mdB/°C (16 ppm/°C) typ, 0.45 mdB/°C (52 ppm/°C) max
Offset drift: 19.2 μV/°C typ, 118 μV/°C max
Channel-to-channel matching
Phase (fin in kHz): fin × 0.045° + 0.04 max
Gain 0.01: dB typ, 0.04 dB max
PassbandFrequency: 0.45 × fs
Flatness (fs = 51.2 kS/s): ±40 mdB (pk-to-pk max)
Phase nonlinearity, fs = 51.2 kS/s: ±0.45° max
StopbandFrequency: 0.55 × fs
Rejection: 100 dB
Alias-free bandwidth: 0.45 × fsOversample rate: 64 × fs
Crosstalk (1 kHz): –110 dB
CMRR, fin ≤ 1 kHz, 40 dB min: 47 dB typ
SFDR , fin = 1 kHz, –60 dBFS: 120 dB
Input impedanceDifferential: 305 kΩ
AI– (shield) to chassis ground: 50 Ω

Input amplitude

Intermodulation
distortion (–1 dBFS)

Calibrated

1% Reading(Gain Error)% Reading(Offset Error)1

0 °C to 50 °C max±0.34%, ±0.03 dB±0.14%, ±7.1 mV

25 °C ±5 °C typ±0.07%, ±0.006 dB±0.01%, ±0.5 mV

Noise density

51.2 kS/s

25.6 kS/s
99 dBFS

103 dBFS

50 µVrms

40 µVrms

25 µVrms

310 nV/√Hz

350 nV/√Hz

780 nV/√Hz

DIN 250 Hz/8 kHz
4:1 amplitude ratio–80 dB

CCIF 11 kHz/12 kHz 1:1
amplitude ratio–93 dB

Ethernet type: 100 Base-TX, 10 Base-T
Communication rates: 10/100 Mbps, auto-negotiatedConnector: RJ-45, 8 position
Cable length: 100 meters (328 feet) max

Network configuration

Network IP configuration: DHCP, link-local, static
DHCP may be disabled by the user and a static IP address assigned
If DHCP is enabled but is unsuccessful at obtaining an IP address the device
will fall back to link-local and request the IP address 169.254.100.100.
Network device name: The name used for detecting the device using mDNS
(zero-conf). This name may be changed using the web interface.
Network name publication: By mDNS
User accounts: admin and share. These accounts are case-sensitive and cannot bechanged using the web interface.

Factory default settings

Factory default IP address: 192.168.0.101
Factory default subnet mask: 255.255.255.0
Factory default Gateway: 192.168.0.1
Factory default DHCP setting: DHCP + link-local enabled
Factory default password for admin account: admin. Passwords are case sensitiveand can be changed using the web interface.
Factory default password for share account: share. Passwords are case sensitive andcan be changed using the web interface.
Factory default device name: webdaq-xxxxxx, where xxxxxx is the last 6 digits of
the MAC address (printed on the label on the underside of the device).
Note: When factory defaults are restored, any shared folders or mapped drives
are reset.

2.048 kS/s

97 dBFS

1 kHz: –95 dB
8 kHz: –80 dB

Network

Idle Channel and Noise Density
Idle Channel–20 dBFS

Digital type: CMOS (Schmitt trigger) input / open drain output
Number of I/O: One port of 4 bits
Configuration: Bit configurable for input or output
Power on conditions: Power on reset is input mode
Pull-up configuration: Each bit is pulled up to 5 V with a 100 kΩ resistor
Input frequency range: DC – 10 kHz.
Input high voltage threshold: 1.9 V min, 3.6 V max
Input low voltage threshold: 2.3 V max, 1.0 V min
Schmitt trigger hysteresis: 0.6 V min, 1.7 V max
Input high voltage limit: 15 V absolute max
Input low voltage limit: –0.5 V absolute min, 0 V recommended min
Output off state leakage current: 10 µA max
Output sink current capability: 100 mA max (continuous) per output pin
Output transistor on-resistance (drain to source): 1.6 ΩRange = 5.1 Vpk.

NoiseSpecification
1 kHz: –95 dB
8 kHz: –87 dB

Digital input/output

Measurement Accuracy
Measurement Conditions

Condition–1 dBFS

USB ports

Number of USB ports: Two, for connection to a mass storage device or approved
WiFi adapter.
USB device type: USB 2.0 (high-speed)Device compatibility: USB 1.1, USB 2.0, USB 3.0

SD memory card slot

Memory card type: SD, SDHC, SDXC, MMC, TransFlash
File systems supported: FAT16, FAT32, exFAT, ext2/3/4, NTFS

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WebDAQ DT5837
Ordering
Push buttons

Shock

Power (POWER):
W1 jumper installed (factory default): Turns device on or off.
W1 jumper removed (device on when power is applied): Reboots the device.
Function (FUNC): Unmounts external media, or starts/stops an acquisition
Reset (CONFIG RESET): Restores network and alarm settings to factory default values.

Operating shock: 30 g, 11 ms half sine; 18 shocks at 6 orientations

Mechanical

Dimensions (L × W × H): 158.8 × 146.1 × 38.1 mm (6.25 × 5.75 × 1.50 in.)With BNC connectors: 178.8 × 146.1 × 38.1 mm (7.04 × 5.75 × 1.50 in.)
Weight: 680 g (1.5 lb)

Ground connector

EnvironmentalConnector port for the #6-32 ground screw.

Temperature range: 0 °C to 50 °C max operating, –40 °C to 85 °C storage
Ingress protection: IP 30
Humidity: 10- 90% RH, noncondensing (Operating), 5-95% RH (Storage)
Maximum altitude: 2,000 m (6,562 ft)
Pollution Degree : 2The WebDAQ DT5837 is intended for indoor use only but may be used outdoors
if installed in a suitable enclosure.

PowerInput voltage: Center positive. 6 VDC to 16 VDC
Input wattage: 4 W typ, 10 W max
External AC adapter†: 12 VDC, 1.25 amps, 110 VAC to 240 VAC input range
Battery: One 3 V button cell lithium battery (BR1225 or CR1225); replaceable† Japan only

Order Information

Accessories

HardwarePart No.

Description

ACC-205

DIN-rail mounting kit; requires the ACC-404 panel/wall mounting kit.

ACC-403

6-position detachable screw terminal (2).

ACC-404

Panel/wall mounting bracket; use with the ACC-205
to mount on a DIN rail.

PS-9V1AEPS230V

9 VDC, 1.67 A replacement power supply;interchangeable plugs available separately.

Part No.

Description

WebDAQ DT5837

Internet enabled vibration and acoustic logger withfour analog inputs, simultaneous sampling, IEPE signal
conditioning, embedded operating system and webserver. External power supply included*.

* Japan only.

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September 2019. Rev 2© Measurement Computing Corporation