WebDAQ 316
Internet Enabled Thermocouple Logger

Remote Configuration and Monitoring

Virtually Unlimited Storage

Integrated HW and SW

Flexible Triggers,Alarms, Events,Emails, and SMS
Texts

Built-in Web Server,
Easy-to-Use

WebDAQ 316
Internet Enabled Thermocouple Data LoggerFeatures• 16 thermocouple inputs− Isolated to 250 V• Four isolated DIO for triggers
and alarms• Log data to internal storage ormapped network storage
The WebDAQ 316 intelligent logger features remote monitoring and control of real-timetemperature data.

Overview• Share folders to view files overa local network• Export data to csv, UFF,
or binary for use in otherapplications

The WebDAQ 316 is a stand-alone, temperature logger designed for remote monitoring and control. All the intelligence is built into the WebDAQ, eliminating theneed 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 and any device with a web browser.

• Alarm and event notifications
with email and SMS messaging

The WebDAQ 316 provides 16 isolated thermocouple inputs, and four isolated
digital bits that can be used as trigger inputs or alarm outputs. Housed in a heavyduty chassis, the WebDAQ 316 is rugged enough for industrial applications.

• Built-in web server

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.

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 wirelessnetwork.

• Easy, flexible task scheduling• Configurable read/write access• No driver software to install• Remote monitoring and control• WiFi support

Flexible Triggering
Start or stop the acquisition based on
analog or digital thresholds, alarm states,or date/time values. On-demand pushbutton triggering is also supported.

The WebDAQ web server is optimizedfor both desktop and mobile use. Users
can perform data acquisition tasks fromphones, tablets and laptops with a single,
intuitive user interface.

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 schedule ofjobs in which one job automatically runs
after an alarm condition is triggered on adifferent job, such as when a temperatureis reached or when a digital input changes.

Measurement Computing

Device-independent operation lets you remotely monitor and control the WebDAQ 316 fromany device with a web browser.

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WebDAQ 316
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 to dynamicacquisition.
1 Schedule and 2 Jobs
Users can easily setup 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 berestarted.

Clear, Concise, Data Displays
WebDAQ users don’t need to rely on the small
screens and difficult to navigate displays of mostother loggers. With WebDAQ’s intuitive webinterface, users can easily see their data and alarm
conditions in real time or after the acquisition iscomplete.

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WebDAQ 316
Features
Alarm and Event Notifications

Run the Schedule on Startup

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.

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

Users can configure one or more events to record when a job isstarted, stopped, or triggered, or if an error condition is detected.

A 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.

Real-Time Clock

Receive alarm and event notifications on one or more addresses
using email and SMS messaging.

Isolated Thermocouple Inputs

Virtually Unlimited Storage

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

Store data files and configuration settings locally in internal flash
memory, or save to external media or network folders.
Users can map a network drive or FTP server as the location tolog data or store files.

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

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

Isolated Digital I/O

Share Folders

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

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

Flexible Power Requirements

Real-Time Data Display
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.

Provide power with the 9 volt, 1.67 amp supply that ships withthe device, or connect any 6 to 16 DC supply

Control Read and Write Access

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

Firmware Updates

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

Calibration
The WebDAQ 316 is factory-calibrated using a NIST-traceablecalibration process. Specifications are guaranteed for one year.
Return the device to the factory for recalibration.
Real-time
Clock withBattery

Spring Terminals

Screw Terminals

Buttons/LEDs

416

Isolated
DIO

Thermocouple
Measurement
ModuleMicroprocessor,RAM, and FlashSD
Connector

Raspberry PiComputeModuleUSB Huband
10/100 Ethernet
Controller

Dual USBConnectors

RJ-45
EthernetConnector

PowerSupplies

PowerInput
Ext Pwr+9 VDC/1.67 A

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WebDAQ 316
Front and Rear Panels
Front Panel
Detachable spring and screw terminals allow quick thermocouple 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 316
Specifications
Digital input/output

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

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 ΩThermocouple input

Number of channels: 16 thermocouple channels, 1 internal auto zero channel,
1 internal cold-junction compensation channel
ADC resolution: 24 bitsType 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*
Requested
Scan Rate

ModeConversion Time(per channel)

Sample Rate(per channel)≤1 Hz

High-resolution

55 ms

1 S/s

>1 Hz

High-speed

740 µs75 S/sNetwork

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* The timing mode is automatically set for either high-resolution or high-speed
mode based on the requested scan rate, regardless of the number of channels.
Common-mode voltage range
Channel-to-COM: ±1.2 V min
COM-to-earth ground: ±250 V
Common-mode rejection ratio (CMMR)
High-resolution mode at DC and 50 to 60 Hz:		 Channel-to-COM: 100 dB		 COM-to-earth ground: >170 dB
High-speed mode at 0 to 60 Hz:		 Channel-to-COM: 70 dB		 COM-to-earth ground: >150 dB
Input bandwidth:
High-resolution mode: 14.4 Hz
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 noise
High-resolution mode: 200 nVrms
High-speed mode: 7 µVrms
Gain error
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
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 error
High-resolution mode: 4 µV typ, 6 µV max
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, whensource 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

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.

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

Temperature measurement accuracy

Push buttons

Measurement sensitivity represents the smallest change in temperature that a sensor can detect. It is a function of noise. The values assume the full measurement
range of the standard thermocouple sensor per ASTM E230 87.

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.

Input characteristics
Parameter
Measurement
sensitivity

ModeHigh-resolution
High-speed

PowerSpecification

Input voltage: Center positive. 6 VDC to 16 VDC
Input wattage: 4 W typ, 10 W max
External AC adapter: 9 VDC, 1.67 amps, 110 VAC to 240 VAC input range
Battery: One 3 V button cell lithium battery (BR1225 or CR1225); replaceable

Type J, K, T, E, N: <0.02 °C
Type B, R, S: <0.15 °C
Type J, K, T, E: <0.25 °C
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.

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WebDAQ 316
Ordering
MechanicalEnvironmental

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)

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.

Order Information

Accessories

HardwarePart No.

Description

ACC-205

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

ACC-40236-position detachable spring terminal.

ACC-403

6-position detachable screw terminal (2).

ACC-404

Panel/wall mounting kit; use with the ACC-205 tomount on a DIN rail.

PS-9V1AEPS230V

9 VDC, 1.67 A replacement power supply.
Interchangeable power plugs are available separately.

Part No.

Description

WebDAQ 316

Internet enabled data logger with 16 thermocouple inputs
and 4 DIO lines, embedded operating system and webserver; includes the PS-9V1AEPS230V power supply withUSA, UK, and Europe plugs.

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January 2020. Rev 5© Measurement Computing Corporation