1300 Henley Court
Pullman, WA 99163
digilent.com

WebDAQ 316 Datasheet
Internet Enabled Thermocouple Data Logger

Highlighted Features

The WebDAQ 316 intelligent logger features remote monitoring and control ofreal-time temperature data.

• 16 thermocouple inputs (Isolated to 250 V)• Four isolated DIO for triggers and alarms• Log data to internal storage or mapped
network storage• Share folders to view files over a local
network• Export data to csv, UFF, or binary for use inother applications• Alarm and event notifications with email
and SMS messaging• Easy, flexible task scheduling• Configurable read/write access• No driver software to install• Built-in web server• Remote monitoring and control• WiFi supportOverview
The WebDAQ 316 is a stand-alone, temperature logger designed for remote monitoring and control. All theintelligence 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 temperature data, update
digital outputs and/or send notifications based on alarm conditions, and view real-time data from any location andany device with a web browser.
The WebDAQ 316 provides 16 isolated thermocouple inputs, and four isolated digital bits that can be used astrigger inputs or alarm outputs. Housed in a heavy-duty chassis, the WebDAQ 316 is rugged enough for industrial
applications.

Integrated Software and Hardware
The WebDAQ Series embedded OS and web server provide an all-in-one package for stand-alone data logging andalarming. Users can monitor and control their applications from anywhere with a web browser. The WebDAQ webserver is optimized for both desktop and mobile use. Users can perform data acquisition tasks from phones, tabletsand laptops with a single, intuitive user interface.

Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.

Page 1 of 10

WebDAQ 316 Datasheet – Rev 1, June 2024

Remote Access and Control
Install the WebDAQ 316 on any network and access it using any device with a web browser to remotely monitor
and control all operations. Users can connect a WiFi adapter to the rear panel and communicate with the WebDAQ
over a wireless network. Refer to our website for a list of the WiFi adapters approved for use with WebDAQ Series
hardware.

Flexible Triggering
Start or stop the acquisition based on analog or digital thresholds, alarm states, 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 managementtasks. Hardware, trigger, and alarm settings are contained in a single task, or “job”. Multiple “jobs” can be run in a“schedule” for more complex data logging applications. For example, users can create a schedule of jobs in which
one job automatically runs after an alarm condition is triggered on a different job, such as when a temperature isreached or when a digital input changes.

Device-independent operation lets you remotely monitor and control the WebDAQ 316 from any device with a webbrowser.

Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.

Page 2 of 10

WebDAQ 316 Datasheet – Rev 1, June 2024

Introduction
Easy Setup – Powerful Capabilities
Jobs are the building blocks of WebDAQ. The ability to define different data logging jobs, or tasks, and add them toa 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?
The basic building block of WebDAQ, a job defineschannel configuration, logging options, start and stop
conditions, and alarming.

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

Example:Switching from static acquisition to dynamic acquisition.
1 Schedule and 2 Jobs
Users can easily set up a job for a slow, static acquisition
and a fast dynamic acquisition. 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 be restarted.

Clear, Concise, Data Displays
WebDAQ users don’t need to rely on the small screensand difficult to navigate displays of most other loggers.
With WebDAQ’s intuitive web interface, users can easily
see their data and alarm conditions in real time or after
the acquisition is complete.

Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.

Page 3 of 10

WebDAQ 316 Datasheet – Rev 1, June 2024

Features
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 yourbrowser. View the alarm status on the web interface.
Users can configure one or more events to record
when a job is started, stopped, or triggered, or if anerror condition is detected. Receive alarm and event
notifications on one or more addresses using email
and SMS messaging.

Virtually Unlimited Storage

Store data files and configuration settings locally ininternal flash memory or save to external media or
network folders. Users can map a network drive orFTP server as the location to log data or store files.
Easily transfer files between WebDAQ storage
locations and mapped network storage locations.

Share Folders

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

Isolated Thermocouple Inputs
The WebDAQ 316 provides up to 16 thermocouple
channels. Thermocouple inputs are isolated fromground. Overvoltage protection is provided between
any two inputs.

CJC and Auto Zero Support
Cold junction compensation (CJC) is enabled for allchannels. Users can enable auto zero to compensate
for offset errors.

Isolated Digital I/O

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

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

Real-Time Data Display

Flexible Power Requirements

View data as it is acquired or from a stored file. Users
can specify a range of data to view and zoom in or out.
Data is plotted on strip chart and scalar displays.

Control Read and Write Access

Users can control who can view and modify jobsettings by defining a password and setting thesecurity level for the admin account. A “share”
password can be used to access a shared folder or FTP
server running on the WebDAQ.

Run the Schedule on Startup

Automatically run the schedule when the systemstarts up. Multiple jobs in the schedule are runconsecutively.

Provide power with the 9 volt, 2.2 amp supply thatships with the device, or connect any 6 to 16 DC
supply.

Firmware Updates

Device firmware is bundled with the operating system
and web server in one update file. This allows theWebDAQ 316 to be updated in the field.

Calibration

The WebDAQ 316 is factory-calibrated using a NISTtraceable calibration process. Specifications areguaranteed for one year. Return the device to thefactory for recalibration.

Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.

Page 4 of 10

WebDAQ 316 Datasheet – Rev 1, June 2024

Functional Block Diagram

Front and Rear Panels
Front Panel
Detachable spring and screw terminals allow quick thermocouple and digital connections.

Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.

Page 5 of 10

WebDAQ 316 Datasheet – Rev 1, June 2024

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

Specifications
All specifications are subject to change without notice. Typical for 0 °C to 50 °C unless otherwise specified.
Thermocouple input••
•••
•

•

•

Number of channels: 16 thermocouple channels, 1 internal auto zero channel, 1 internal cold-junction
compensation channel
ADC resolution: 24 bits
Type of ADC: Delta-Sigma
Sampling mode: Scanned
Voltage measurement range: ±78.125 mV
Temperature measurement ranges: Works over temperature ranges defined by NIST (J, K, T, E, N, B, R, S
thermocouple types)
Timing Mode*
Conversion Time (perSample Rate (perRequested Scan RateModechannel)channel)≤1 Hz
High-resolution
55 ms
1 S/s
>1 Hz
High-speed
740 µs75 S/s*The timing mode is automatically set for either high-resolution or high-speed mode based on therequested scan rate, regardless of the number of channels.
Common-mode voltage rangeo Channel-to-COM: ±1.2 V mino COM-to-earth ground: ±250 V
Common-mode rejection ratio (CMMR)o High-resolution mode at DC and 50 to 60 Hz:

Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.

Page 6 of 10

WebDAQ 316 Datasheet – Rev 1, June 2024

•

•
•
•
•
•

•

•

•
•
•

▪ Channel-to-COM: 100 dB▪ COM-to-earth ground: >170 dBo High-speed mode at 0 to 60 Hz:▪ Channel-to-COM: 70 dB▪ COM-to-earth ground: >150 dBInput bandwidth:o High-resolution mode: 14.4 Hzo High-speed mode: 78 Hz
High-resolution noise rejection, 50 Hz and 60 Hz: 60 dB
Overvoltage protection: ±30 V between any two inputs
Differential input impedance: 78 MΩ
Input current: 50 nA
Input noiseo High-resolution mode: 200 nVrms
o High-speed mode: 7 µVrms
Gain erroro High-resolution mode: 0.03% typ at 25 °C, 0.07% typ at 0 °C to 60 °C, 0.15% max at 0 °C to 60 °C
o High-speed mode: 0.04% typ at 25 °C, 0.08% typ at 0 °C to 60 °C, 0.16% max at 0 °C to 60 °C
Offset erroro High-resolution mode: 4 µV typ, 6 µV maxo High-speed mode: 14 µV typ, 17 µV max
Offset error from source impedance: 0 °C to 60 °C: Add 0.05 µV per Ω, when source impedance >50 Ω
Cold-junction compensation accuracy: 0.8 °C typ, 1.7 °C max
Warm-up time: The device is lying flat or facing upward; constant ambient temperature:15 minutes
recommended

Temperature measurement accuracy
Measurement sensitivity represents the smallest change in temperature that a sensor can detect. It is a function ofnoise. The values assume the full measurement range of the standard thermocouple sensor per ASTM E230 87.
Input Characteristics
Type J, K, T, E, N: <0.02 °C
Type B, R, S: <0.15 °C
Measurement
High-resolution
Type J, K, T, E: <0.25 °C
sensitivity
High-speed
Type N: <0.35 °C
Type B: <1.2 °CType R, S: <2.8 °C
Refer to the Specifications chapter of the hardware user’s guide for accuracy error diagrams of each thermocouple
type.
Digital input/output•••••••

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

Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.

Page 7 of 10

WebDAQ 316 Datasheet – Rev 1, June 2024•••••••

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 ΩNetwork••••

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, statico DHCP may be disabled by the user and a static IP address assignedo If DHCP is enabled but is unsuccessful at obtaining an IP address the device will fall back to linklocal 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 bechanged using the web interface.
Network name publication: By mDNS
User accounts: admin and share. These accounts are case-sensitive and cannot be changed using the webinterface.

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 sensitive and can be changed
using the web interface.
Factory default password for share account: share. Passwords are case sensitive and can be changed usingthe web interface.
Factory default device name: webdaq-xxxxxx, where xxxxxx is the last 6 digits of the MAC address (printedon the label on the underside of the device).
Note: When factory defaults are restored, any shared folders or mapped drives are reset.

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, TransFlashCopyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.

Page 8 of 10

WebDAQ 316 Datasheet – Rev 1, June 2024•

File systems supported: FAT16, FAT32, exFAT, ext2/3/4, NTFS

Push buttons•••

Power (POWER): W1 jumper installed (factory default): Turns device on or off.
o 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.

Power••••

Input voltage: Center positive. 6 VDC to 16 VDC
Input wattage: 4 W typ, 10 W max
External AC adapter: 9 VDC, 2.2 amps, 110 VAC to 240 VAC input range
Battery: One 3 V button cell lithium battery (BR1225 or CR1225); replaceable

Mechanical•••

Dimensions (L × W × H): 158.8 × 146.1 × 38.1 mm (6.25 × 5.75 × 1.50 in.)With spring terminal: 177.0 × 146.1 × 38.1 mm (6.97 × 5.75 × 1.50 in.)
Weight: 635 g (1.45 lb)

Environmental••••••

Operating temperature range: 0 °C to 50 °C max
Storage temperature range: –40 °C to 85 °C
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 316 is intended for indoor use only, but may be used outdoors if installed in a suitable enclosure.

Ordering Information
HardwarePart No.
6069-410-005-1

Description
WebDAQ 316: Internet enabled data logger with 16 thermocouple inputs and 4 DIO lines,embedded operating system and web server; includes the ATS018T-W090V power supply
with USA, UK, and Europe plugs.

Accessories
Part No.
6069-240-005
6069-240-006
6069-240-000
6069-240-001
6069-240-004
6069-240-002
6069-240-003

Description
ACC-205: DIN-rail mounting kit; requires the ACC-404 panel/ wall mounting kit.
ACC-404: Panel/wall mounting kit; use with the ACC-205 to mount on a DIN rail.
J Type Thermocouple (Length: 1 Meter)
J Type Thermocouple (Length: 2 Meter)
T Type Thermocouple (Length: 2 Meter)
K Type Thermocouple (Length: 1 Meter)
K Type Thermocouple (Length: 2 Meter)

Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.

Page 9 of 10

WebDAQ 316 Datasheet – Rev 1, June 2024

WebDAQ Series

6069-410-006-1

WebDAQ 504: Internet enabled vibration and acoustic logger with four analog inputs,
simultaneous sampling, IEPE signal conditioning, embedded operating system and web
server; includes the ATS018T-W090V power supply with USA, UK, and Europe plugs.

6069-410-007-1

WebDAQ 904: Internet enabled universal input logger with four analog inputs,
simultaneous sampling, support for multiple measurement types, embedded operating
system and web server; includes the ATS018T-W090V power supply with USA, UK, andEurope plugs.

About Digilent
Digilent is committed to making engineering accessible, offering competitive pricing, portable products, andcomprehensive documentation. Specializing in test and measurement devices, Xilinx-based FPGA development
boards, a variety of expansion modules for customizing applications, and robust options for DAQ and datalogging,our design philosophy champions your creativity. By emphasizing speed, modularity, customizability, and worldclass support, we provide the building blocks while you bring the brilliance.

Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.

Page 10 of 10