MC WebDAQ 316 User manual

WebDAQ 316
Internet Enabled Thermocouple Data Logger
User's Guide
July 2017. Rev 1
© Measurement Computing Corporation

2
HM WebDAQ 316
Trademark and Copyright Information
Measurement Computing Corporation, InstaCal, Universal Library, and the Measurement Computing logo are
either trademarks or registered trademarks of Measurement Computing Corporation. Refer to the Copyrights &
Trademarks section on mccdaq.com/legal for more information about Measurement Computing trademarks.
Other product and company names mentioned herein are trademarks or trade names of their respective
companies.
© 2017 Measurement Computing Corporation. All rights reserved. No part of this publication may be
reproduced, stored in a retrieval system, or transmitted, in any form by any means, electronic, mechanical, by
photocopying, recording, or otherwise without the prior written permission of Measurement Computing
Corporation.
Notice
Measurement Computing Corporation does not authorize any Measurement Computing Corporation product for
use in life support systems and/or devices without prior written consent from Measurement Computing
Corporation. Life support devices/systems are devices or systems that, a) are intended for surgical implantation
into the body, or b) support or sustain life and whose failure to perform can be reasonably expected to result in
injury. Measurement Computing Corporation products are not designed with the components required, and are
not subject to the testing required to ensure a level of reliability suitable for the treatment and diagnosis of
people.

3
Table of Contents
Preface
About this User's Guide .......................................................................................................................5
What you will learn from this user's guide .........................................................................................................5
Conventions in this user's guide .........................................................................................................................5
Where to find more information .........................................................................................................................5
Hazardous voltages.............................................................................................................................................5
Hazardous locations.......................................................................................................................................................... 5
Chapter 1
Introducing the WebDAQ 316 ..............................................................................................................6
Powered by Raspberry Pi®..................................................................................................................................6
Integrated operating system and web service .....................................................................................................6
Ethernet interface................................................................................................................................................6
Functional block diagram ...................................................................................................................................7
Unpacking...........................................................................................................................................................7
Chapter 2
Setting up the WebDAQ 316.................................................................................................................8
Connecting to a local area network.....................................................................................................................8
Connecting to a network with DHCP enabled .................................................................................................................. 8
Connecting directly to a PC .............................................................................................................................................. 8
Connecting the external power adapter ..............................................................................................................8
Detecting the device on the network...................................................................................................................8
Accessing the WebDAQ web interface............................................................................................................................. 9
Configuring the network router for communication across networks ................................................................9
Security.............................................................................................................................................................10
Restoring factory default settings .....................................................................................................................10
Chapter 3
Functional Details ...............................................................................................................................11
Front panel components....................................................................................................................................11
Screw terminal .................................................................................................................................................................11
Spring terminal ................................................................................................................................................................12
Rear panel components.....................................................................................................................................13
External power connector ................................................................................................................................................13
Power button....................................................................................................................................................................13
Function button................................................................................................................................................................13
LED status indicators.......................................................................................................................................................14
SD card slot......................................................................................................................................................................14
Factory reset button .........................................................................................................................................................14
Ethernet connector ...........................................................................................................................................................14
Ground connector ............................................................................................................................................................15
USB connectors ...............................................................................................................................................................15
Analog input circuitry.......................................................................................................................................15
Open thermocouple detection ..........................................................................................................................................15
Input Impedance ..............................................................................................................................................................15
Overvoltage protection.....................................................................................................................................................15
Thermocouple measurement accuracy .............................................................................................................................15
Replacing the battery ........................................................................................................................................16
Updating WebDAQ firmware...........................................................................................................................16
Recovering from a failed update ......................................................................................................................................17
Calibrating the hardware...................................................................................................................................17

WebDAQ 316 User's Guide
4
Chapter 4
Specifications......................................................................................................................................18
Thermocouple input..........................................................................................................................................18
Temperature measurement accuracy ................................................................................................................19
Digital input/output...........................................................................................................................................21
Network ............................................................................................................................................................22
Ethernet connection .........................................................................................................................................................22
Network interface ............................................................................................................................................................22
Network factory default settings ......................................................................................................................................22
Processor / Memory..........................................................................................................................................22
USB ports .........................................................................................................................................................23
SD memory card slot ........................................................................................................................................23
LED indicators..................................................................................................................................................23
Push buttons......................................................................................................................................................24
Ground connector .............................................................................................................................................24
Power ................................................................................................................................................................24
Mechanical .......................................................................................................................................................25
Environmental ..................................................................................................................................................25
Safety voltages..................................................................................................................................................25
Signal connectors..............................................................................................................................................25
Screw terminal .................................................................................................................................................................26
Spring terminal ................................................................................................................................................................26
EU Declaration of Conformity............................................................................................................27

5
Preface
About this User's Guide
What you will learn from this user's guide
This user's guide describes the Measurement Computing WebDAQ 316 data acquisition device, the WebDAQ
web interface, and lists device specifications.
Conventions in this user's guide
For more information
Text presented in a box signifies additional information related to the subject matter.
Caution! Shaded caution statements present information to help you avoid injuring yourself and others,
damaging your hardware, or losing your data.
bold text Bold text is used for the names of objects on a screen, such as buttons, text boxes, and check boxes.
italic text Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase.
Where to find more information
Additional information about WebDAQ 316 hardware is available on our website at www.mccdaq.com. You
can also contact Measurement Computing Corporation with specific questions.
WebDAQ web interface: Open the Help page for information about using WebDAQ software; see page 9.
Knowledgebase: kb.mccdaq.com
Tech support form: www.mccdaq.com/support/support_form.aspx
Email: [e-mail]
Phone: [phone] and follow the instructions for reaching Tech Support
For international customers, contact your local distributor. Refer to the International Distributors section on our
website at www.mccdaq.com/International.
Hazardous voltages
Take the following precautions if you connect hazardous voltages to the WebDAQ 316 spring
terminals. A hazardous voltage is a voltage greater than 42.4 Vpk or 60 VDC to earth ground.
Caution! Ensure that hazardous voltage wiring is performed only by qualified personnel adhering to local
electrical standards.
Do not mix hazardous voltage circuits and human-accessible circuits on the same device.
Make sure that devices and circuits connected to the WebDAQ 316 are properly insulated from
human contact.
Hazardous locations
The WebDAQ 316 is not certified for use in hazardous locations.

6
Chapter 1
Introducing the WebDAQ 316
The WebDAQ 316 is part of the WebDAQ Series of Internet enabled data loggers. WebDAQ 316 is a
thermocouple acquisition and logging device that provides the following features:
16 differential thermocouple inputs
75 S/s aggregate sample rate
250 Vrms channel-to-earth isolation
Overvoltage protection between any two inputs
50/60 Hz noise rejection
Cold junction compensation (CJC)
Auto zero channel
Four bidirectional, isolated DIO
10/100 Ethernet interface
Support for USB mass storage devices and SD cards for data logging or file transfer
Powered by a +9 VDC external supply (included)
WebDAQ Series devices are designed with an integrated operating system and web interface. You
communicate with the device over a network connection using the web interface opened in a web browser.
Mobile support – access the WebDAQ 316 from any device with a web browser, such as a phone or tablet
Remote monitoring and control
Run simple to complex logging operations
Flexible task scheduling
Powered by Raspberry Pi®
The WebDAQ 316 is designed with the Raspberry Pi Compute Module, featuring a quad core processor with
speeds up to 1.2 GHz, 1GB RAM and 4 GB Flash memory.
Integrated operating system and web service
The WebDAQ 316 is a complete data acquisition system containing an embedded operating system and web
server. The operating system resides in internal flash memory, and includes a web service and device driver. All
configuration, acquisition, and data management is performed using the web interface.
Ethernet interface
The WebDAQ 316 has a built-in 10/100 BASE-T auto-negotiation, high-speed communication port. You can
access and configure your WebDAQ 316 from anywhere with access to the network to which it is connected.
A unique MAC address is assigned to each device at the factory. You configure the Ethernet connection settings
through a web interface. The default network name uses the format webdaq-xxxxxx, where xxxxxx are the
lower six digits of the factory-assigned MAC address. You can change this name with the web interface.

WebDAQ 316 User's Guide Introducing the WebDAQ 316
7
Functional block diagram
Device functions are illustrated in the block diagram shown here.
Figure 1. WebDAQ 316 functional block diagram
Unpacking
As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the board from its packaging, ground yourself using a wrist strap or by simply
touching the computer chassis or other grounded object to eliminate any stored static charge.

8
Chapter 2
Setting up the WebDAQ 316
Connecting to a local area network
The WebDAQ 316 requires a TCP/IP connection to a network or the Ethernet port of a computer. A standard
Ethernet cable is shipped with the device.
The WebDAQ 316 IP address type is set by default for DHCP/Link-Local. When connected to a network, the
device first attempts to receive an IP address from a DHCP server. If this fails, a link-local address is used. Use
of a static address requires configuration via the web interface. The IP address identifies the WebDAQ 316 on
the network, and is used to access the web interface.
Connecting to a network with DHCP enabled
Connect one end of the Ethernet cable to the connector on the WebDAQ 316 rear panel, and connect the other
end to a 10Base-T or 100Base-TX compatible Ethernet port, hub, or switch.
Once the device is detected, DHCP assigns an address. A different address may be assigned each time the
hardware is connected to the network.
Connecting directly to a PC
Connect one end of the Ethernet cable to the connector on the WebDAQ 316 rear panel, and connect the other
end directly to the Ethernet port on a PC. The WebDAQ 316 attempts to communicate with the host PC using
169.254.100.100 – the link-local address stored on the device. The host PC may accept this address or use a
different address. The link-local address is valid only for communications between the WebDAQ 316 and the
host PC to which it is connected.
Connecting the external power adapter
Connect the network cable before connecting to external power
Connecting to the external supply before installing on a network results in the device attempting to auto-
negotiate a network address before one is available.
WebDAQ 316 ships with a 9 volt, 1.67 amp external power adapter included with the shipment (MCC p/n
PS-9V1AEPS230V).
Connect the adapter cord to the power connector labeled EXT PWR on the device rear panel, and plug the
AC adapter into an electrical outlet.
The POWER LED on the rear panel turns yellow as the hardware starts up, and then green to indicate it is ready
for use. Refer to Figure 7 on page 13 for the location of this LED.
Detecting the device on the network
WebDAQ uses the "zeroconf" zero-configuration protocol to announce its presence on a local area network.
Zeroconf uses a device name which can be accessed from other computers on the network.
Zero-configuration networking is helpful to find your WebDAQ hardware on the network
The easiest way to add zeroconf support to Windows is to install Bonjour Print Services. Bonjour software is
Apple's implementation of zero-configuration networking, and is readily available as a free download – open a
browser window and search for Bonjour Print Services.
Zeroconf is built into popular applications such as Apple ITunes®and instant messaging software, so your
computer may already support it.
Many Linux systems will have the avahi version of zeroconf installed by default, so it’s likely zeroconf is
available if you’re running Linux.

WebDAQ 316 User's Guide Setting up the WebDAQ 316
9
Accessing the WebDAQ web interface
To access the WebDAQ web interface, open a browser* window and enter http://webdaq-xxxxxx.local, where
xxxxxx is the last 6 digits of the MAC address. The MAC address is on a label at the bottom of the WebDAQ
enclosure.
If your network supports zeroconf protocol, the WebDAQ web interface opens.
If the web interface does not open or an error is returned, install a device discovery tool such as Bonjour
Print Services. Refer to the note about zero-configuration networking on page 8.
The WebDAQ web interface is shown in Figure 2.
Figure 2. WebDAQ 316WebDAQ web interface
Use the WebDAQ web interface to configure hardware and acquisition options, schedule and run jobs, and to
view and manage data. The Help window provides details about all components on the web interface.
Once a connection is established and you can communicate to the device, you can change the configuration for
other network scenarios.
* The latest version of Chrome, Firefox, Safari, UC Browser, or Opera recommended. Compatible with IE v11
with the latest Windows Updates installed. Not recommended for use with other IE versions or the Edge
browser.
Configuring the network router for communication across networks
To communicate with the WebDAQ 316 over the internet from a computer connected to a different network,
you must change the network configuration of the network router.
Caution! This procedure should only be performed by a network administrator or computer professional.
Incorrect settings can significantly disrupt a network.
In the following procedure, the WebDAQ 316 is installed on the host LAN, the computer is installed on the
client LAN, and it is assumed that you have successfully connected the device to a local network.
1. Determine the IP address of the WebDAQ 316 – open the Device window from the web interface, and note
the IP Address value in the Network Settings tab.
2. Configure your router so that the address determined above is a static address. The procedure for
accomplishing this varies between routers; refer to your router documentation for instructions.

WebDAQ 316 User's Guide Setting up the WebDAQ 316
10
3. Configure the firewall/router to forward an unused port to port 80 on the WebDAQ 316 at the IP address
configured for the device.
Note the static IP address assigned to the router – this is referred to as the WAN address.
4. To access your WebDAQ from a remote location, enter the WAN address followed by the port selected
above preceded by a colon in the web browser.
The format of the address entered in the browser is: 000.000.000.000:00000 (WAN address of router:port
selected for the WebDAQ).
Security
Use the web interface to set the level of access to the website and to change the administrator password.
High: access to the web page requires a password.
Medium: access to the web page is permitted for any user, and data can be read by any user, but changes to
the device configuration or files require a password.
Off: full access is permitted for all users; no password is required.
By default, security access is set to "Off", and the administrator password is set to "admin".
To change the security level or password, open the web interface and go to the Device window, Security tab.
Use the device Reset button to restore security settings to factory default values.
Restoring factory default settings
To restore network configuration and security settings to the factory default values, use a paper clip to press the
CONFIG RESET button. When pressed, the default network and security settings are written to the device and
the WebDAQ 316 is rebooted.
Factory default
Parameter Specification
IP address
192.168.0.101
subnet mask 255.255.255.0
Gateway
192.168.0.1
DHCP setting
DHCP + link-local enabled
Security level
Off
User name
admin (case-sensitive)
Password admin (case-sensitive; editable)
You can change the network settings, security level, and password with the web interface. The user name
"admin" cannot be changed.