PP312

ADC-20 PICO | Alldatasheet

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Technical content

High-resolution data logger ADC-20 and ADC-24 Low cost, high precision 20 or 24-bit resolution Measures up to 16 channels Inputs configurable as single-ended or differential Terminal board available for easy connections Up to 7 input ranges (±39 mV to ±2.5 V) Digital control outputs USB isolation Up to 15 measurements per second Powered from USB port Free PicoLog 6 Cloud® software Free PicoLog 6 Cloud account Multiple units can be run on a single PC Compatible with Windows, macOS, Linux and Raspberry Pi OS www.picotech.com

ADC-20 and ADC-24 data loggers High-resolution data acquisition With up to 24-bit resolution, the ADC-20 and ADC-24 USB data loggers are able to detect small signal changes. Features such as true differential inputs, galvanic isolation and software-selectable sampling rates all contribute to a superior noise-free resolution and ensure that your measurements are reliable and accurate. All Pico data acquisition products run PicoLog software that you can freely download from www.picotech.com/downloads. PicoLog is a complete data acquisition software package for Pico Technology data loggers. It provides a visual, easy-to-use interface for you to quickly set up simple or complex acquisitions and to record, view and analyze data. Multipurpose data acquisition Both the ADC-20 and ADC-24 feature true differential inputs for excellent noise rejection. For greater flexibility each differential input can also be configured as two single-ended inputs. With up to eight differential or 16 single-ended inputs on the ADC-24, this gives you complete control over which type of inputs you use. If you require more channels, you can use multiple PicoLog data loggers on the same PC. With seven bipolar voltage ranges on the ADC-24 and two on the ADC-20 they are versatile enough to be used with a wide range of sensors and signal types. There’s also an external terminal board with screw terminals to allow you to quickly connect and disconnect different sensors. Additionally, the ADC-24 has four configurable digital input/output channels that can be used to control alarms or other devices. The flexibility of the ADC-20 and ADC-24 allows you to use these precision data loggers as an advanced multichannel data acquisition system with a low cost per channel. No need for power supplies or batteries The high-resolution ADC-20 and ADC-24 are powered directly by your PC — eliminating the need for batteries or a separate power supply, and making them ideal when you need a portable data logger. The answer to your data acquisition needs High resolution, true differential inputs, galvanic isolation, and selectable sampling rates combine to ensure that your measurements are always precise and accurate. Configurable inputs, digital inputs and outputs, and programmable voltage ranges give you a truly flexible answer to your data acquisition needs. When you need the ultimate in high resolution and accuracy, the versatile ADC-20 and ADC-24 provide you with a portable answer with the performance and flexibility you need.

ADC-20 and ADC-24 data loggers PicoLog software – straightforward from the start PicoLog is a complete data acquisition software package for the ADC-20 and ADC-24 data loggers, and is fully compatible with Windows, macOS and Linux. With its clear and user-friendly layout, ideal for use with a mouse or a touchscreen, PicoLog allows you to set up the logger and start recording with just a few taps, whatever your level of data logging experience. Set up simple or advanced acquisitions quickly, and record, view and analyze your data with ease. Pan and zoom controls Zoom in, zoom out, zoom to a selection or pan through the data with these tools. If you make a mistake, just click Undo. Cursors and annotations Use cursors to highlight the data value and time at any point on the graph, or click Add annotation to mark that point with a text note. Data view Display all the data collected so far or keep the graph scale the same and pan along as new samples appear. Give instant feedback We want to hear from you! Click here to contact Pico with your comments. Graph view Display your data in real time, as it is collected, on up to four independent Y axes simultaneously: set them up by dragging and dropping the entries in the Channels & Axes panel on the right. Cloud captures Share your data for remote viewing Alarms Set up alarms to alert you to a range of events. Alarms can take the form of sounds, visual notifications, graph annotations and more. Notes & annotations Add notes about the dataset as a whole or annotations about particular points on the graph. Capture controls Separate Record, Pause and Reset buttons for easy operation. Save and Export options Copy your graph to the clipboard, save it as a PDF, export the raw data to a CSV file, or save the data and configuration as a robust .picolog database file. Device settings, Graph and Table Easily set up and adjust acquisition and math channels on one or more data loggers and check their status at a glance. You can also select Graph view to see live data trend lines and Table view to see data in tabular form in real-time. Multiple devices Log data on up to 20 devices at the same time. Here, two separate data loggers are in use: one ADC-24 voltage input data logger and one TC-08 temperature data logger. Pullout information panel Manage your channel and axis settings, alarms, notes and capture information in this easy-to-read layout. Close the panel to make more room for the capture graph, and reopen it at any time.

ADC-20 and ADC-24 data loggers Introducing PicoLog Cloud Building on the proven design of PicoLog 6, PicoLog Cloud is a free upgrade that introduces many great features, expanding the capabilities of your Pico data logger. Whether you’re an established user or a newcomer, you will benefi t from the following new additions:

• Live captures streamed directly to the new PicoLog Cloud
• Secure and reliable storage
• Viewing of live and saved captures from a remote computer running PicoLog Cloud, anywhere in the world
• Viewing of live and saved captures on any device (smart phone, tablet, PC) using an internet browser
• Free PicoLog Cloud account
• Compatibility with all current USB PicoLog loggers and PicoScope real-time oscilloscopes
• Straightforward setup with no network settings changes
• Continuous capture with or without network connection
• Source clients for Windows, Linux, macOS and Raspberry Pi OS Stream live captures directly to the new PicoLog Cloud In this update to PicoLog data logging software, your Pico data logger or oscilloscope not only captures to a local disk, but can now stream the capture directly to a secure online Cloud store. Did we mention our new cloud service is completely free for all new and existing customers? This new major feature stays true to our vision of creating a data logging application with a simple user interface, and is equally straightforward for use by technical or non-technical users. PicoLog Cloud is fundamentally the same application as before, but with enhancements to send the live capture data directly to your remote PicoLog Cloud space, and in addition view saved captures stored in the Cloud. Secure and reliable cloud captures Security is at the top of the priority list with PicoLog Cloud, and we use the latest and greatest security techniques and processes to ensure your online data and credentials stay safe. To achieve this, PicoLog Cloud employs an Identity Management Platform to manage the login authentication process, keeping your identity anonymized and your data captures safely yours. In everyday terms, this means you log in with your email and password from one of the following email account providers: Microsoft, Apple or Google. If you don’t have an account with one of those, you can create an anonymized account with another email address. To add an extra layer of security, make sure to use an email account that offers 2FA (two-factor authentication) PicoLog Cloud storage is hosted on another industry-standard service known for excellent reliability and global access: Microsoft Azure. It means you can rely on quality of service (uptime) and multiple server locations back up your data against a server outage. View live and saved captures anywhere in the world Plugged into your PC or laptop, Pico’s instruments have been harnessing the power of your computer’s screen, processor, hard disk, keyboard and mouse for over three decades. But what if you can’t be in the same room, factory, city or even country as your data-capturing equipment? Now, PicoLog Cloud opens a window into your loggers and data, allowing other PCs to view and export your data from anywhere in the world. Of course, those PCs must be signed into your secure, personal PicoLog Cloud account to view any of your captures, live or saved. To keep things simple and avoid making unwanted changes to a live capture, only the host PicoLog Cloud app can change the capture settings.

ADC-20 and ADC-24 data loggers Can I view captures on my smartphone or tablet? PicoLog 6 has always been based on a framework that uses Chromium (Google’s open- source browser) and Java, meaning it is already “browser ready”. It couldn’t be easier to use! Navigate to the URL picolog.app in any browser and log into your PicoLog Cloud account. This gives you instant and secure access to all your live and saved Cloud captures on any internet-connected smart device, anywhere in the world. Some browsers such as Google Chrome and Microsoft Edge make it possible to “install” PicoLog Cloud as a PWA (progressive web app), so it will be available on your home screen or desktop and work like a regular app. Continuous capture, with or without network connection Should your host PC lose network connection during a capture, PicoLog Cloud instantly switches to use the PC’s own hard drive until the network connection is restored. Any missing data is promptly synchronized back to the Cloud. As always, PicoLog 6 in local capture mode is compatible with all PicoLog data loggers and all PicoScope real-time oscilloscopes (with a sample rate limit of 1 kS/s). PicoLog Cloud is compatible with the same instruments, except that the sample rate is limited to 1 S/s per channel. Stream live Cloud capture data to your application with an API Transferring captured data from a data logger software application to a third-party application while the capture is running has been one of the longest outstanding customer feature requests, and had been very diffi cult to implement until now. With PicoLog Cloud data residing on a server, we’ve developed a simple server-side API that allows programmers to request the live data in batches which is returned in a human- and database-readable ASCII format. This feature is particularly useful to users who want to add extra functionality such as emailing alarms or captures, adding logger data to existing databases, or displaying data in a different way: fi ll tanks, percentage bars, throttle gauges, large numerical displays and so on! Once the Cloud capture is set up and acquiring data, you enable public sharing for that capture to generate an unsearchable URL containing a unique ID for that capture on the PicoLog.app server. The API contains just two calls:

• Basic setup, channel IDs, last recorded value and channel names.
• Request a block of capture data with start and end time parameters for the specifi ed channel(s) The API is server-side and sends raw data to your custom application or database, so no special software needs to be installed. Almost all relevant programming languages can call the API URL, and simple code examples are available. Although PicoLog Cloud is limited to 30-day captures in Cloud capture mode before it overwrites the oldest data, you can use this API to transfer and back up your data to a local or online database of your own. PicoLog Cloud capture specifi cations
• No limit to the number of stored captures
• Sample rate up to 1 S/s per channel in cloud mode
• Maximum capture duration is 30 days
• Capture can be set to continuous overwrite or stop after set duration
• Multiple host PicoLog Cloud captures can be used simultaneously on one user account
• View all your devices and captures from one place
• Remote clients can export into CSV, PDF and HDF5 fi les from live and saved captures

ADC-20 and ADC-24 data loggers Math channels Sometimes you need to use data from one or more measurement channels to graph and record a calculated parameter. You can use the PicoLog equation editor to set up simple math channels such as A–B or more complex functions such as log, sqrt, abs, round, min, max, mean and median. PicoLog treats math channels like any other channel, so you can still set alarms and annotate them. Alarms In PicoLog, you can set up alarms to alert you to various events. These can be as simple or as complex as you like: alarms can trigger on a signal threshold or disconnection of the data logger, or you can set up a logic expression of your own. Alarms can play sounds, display visual alerts, run applications or mark when the event occurred on the graph. Intuitive logger and channel setup The Devices view makes it easy to set up a multichannel acquisition system, with the option to use multiple different Pico data loggers simultaneously. PicoLog shows you an image of each connected device, so you can quickly and easily enable or disable channels and set up their properties. On the right, you can see the ADC-24 logger set up for a combination of single-ended and differential inputs. Robust file format At the heart of PicoLog is the file system, which stores live capture data directly to a robust database, rather than to a single file that is vulnerable to corruption and data loss. If the computer is shut down and rebooted, PicoLog will only lose the data during the outage and will resume capturing when you restart the software. This file system also means that the size of the dataset you can capture is virtually unlimited – the only restriction is the size of your computer’s hard disk! The .picolog file format is compatible across all operating systems, and there is no need to set up a file to save to before the capture is complete. You can also save mid- capture if you wish to share the data collected so far. Since anyone can download and install PicoLog for free, you can easily share saved data with co-workers, customers and suppliers for offline post-analysis. PicoSDK® Pico’s software development kit, PicoSDK, is available free of charge and allows you to write your own software and interface to third-party software packages. Pico also maintains repositories of example code on GitHub (github.com/picotech), showing how to use PicoSDK with software packages such as Microsoft Excel, National Instruments LabVIEW and MathWorks MATLAB, or with programming languages including C, C++, C# and Visual Basic .NET. PicoSDK and the ADC-20 and ADC-24 User’s Guide (which includes the Programmer’s Guide) are available to download from www.picotech.com/downloads. Try the PicoLog software today! PicoLog’s built-in demo mode allows you to try out the full functionality of the software with a choice of virtual devices and simulated live data. You also can use PicoLog to view previously saved data, even with no device connected. Visit www.picotech.com/downloads and select PicoLog Data Loggers to get your copy.

ADC-20 and ADC-24 data loggers Inputs and outputs ADC-20 ADC-24 Resolution 20 bits 24 bits Number of channels 4 differential / 8 single-ended 8 differential / 16 single-ended Each differential channel can optionally be configured as two single-ended channels. Conversion time per channel 660 ms, 340 ms, 180 ms, 100 ms, 60 ms Voltage ranges ±2500 mV ±1250 mV ±2500 mV ±1250 mV ±625 mV ±312 mV ±156 mV ±78 mV ±39 mV Gain error 0.2% of reading 0.2% (±2500 mV range) 0.1% (±39 mV to ±1250 mV ranges) Offset accuracy 400 µV (±2500 mV range) 36 µV (±1250 mV range) 400 µV (±2500 mV range) 36 µV (±1250 mV range) 20 µV (±625 mV range) 13 µV (±313 mV range) 9 µV (±156 mV range) 7 µV (±78 mV range) 6 µV (±39 mV range) Offsets typical with input source impedance ≤ 1 kΩ Noise-free resolution Conversion time per channel Voltage range ADC-24 only ADC-20 and ADC-24 ±39 mV ±78 mV ±156 mV ±313 mV ±625 mV ±1250 mV ±2500 mV Noise-free resolution (bits) 660 ms 17 18 19 20 20 20 20 340 ms 17 18 19 19 19 20 20 180 ms 16 17 18 19 19 19 19 100 ms 16 17 18 18 18 19 19 60 ms 15 16 17 18 18 18 18 Noise rejection 120 dB typical at 50/60 Hz Input impedance Differential: 2 MΩ Single-ended: 1 MΩ ADC input bias current 50 nA max. Common mode input range, channel to common ±3.0 V (±2500 mV range) ±1.9 V (±39 mV to ±1250 mV ranges) Common mode input range, common to earth ground ±30 V Specifications

ADC-20 and ADC-24 data loggers Inputs and outputs ADC-20 ADC-24 Common mode rejection ratio, channel to common 95 dB (DC to 60 Hz) Common mode rejection ratio, common to earth ground > 125 dB (DC to 60 Hz) Overvoltage protection ±30 V between any input and common Digital I/O None 4 bidirectional (3.3 V CMOS) Output level, high: > 2.40 V Output level, low: < 0.40 V Input level, high: > 2.20 V Input level, low: < 0.88 V Isolation (input to input) None Isolation (input to ground) Galvanic up to ±30 V AGND and DGND isolated Reference output +2.5 V ±2.5 mV @ 2 mA +5 V ±1.0 V @ 2 mA −5 V ±1.5 V @ 2 mA Environmental Temperature range, operating, for quoted accuracy 20 to 30 °C Temperature range, operating 0 to 45 °C Temperature range, storage −20 to +60 °C Humidity range, operating 5 to 80 %RH, non-condensing Humidity range, storage 5 to 95 %RH, non-condensing General Software PicoLog Cloud, PicoSDK (available from www.picotech.com/downloads) Example code (available from Pico’s GitHub organization page, github.com/picotech) PicoLog user interface languages English, French, Italian, German, Spanish, Korean, Japanese, Chinese (simplified), Russian PC requirements (PicoLog Cloud app) Windows, macOS, Linux or Raspberry Pi OS. For supported OS versions, see PicoLog 6 Release Notes. Hardware as required by the operating system. PC requirements (viewer) Any device with internet access, a web browser and a screen I/O connector 25-way D female Power requirements Powered from USB port, 100 mA (max.) A 4.4 m (13.8 ft) USB cable is permanently attached to the logger Dimensions 135 x 184 x 36 mm (5.31 x 7.24 x 1.41 in) Weight Approx. 505 g (17.8 oz) Compliance European EMC and LVD standards FCC Rules Part 15 Class A Warranty 5 years

Ordering information

PP308 ADC-20 8-channel, 20-bit-resolution precision data logger PP311 ADC-20 data logger including terminal board PP309 ADC-24 16-channel, 24-bit-resolution precision data logger PP312 ADC-24 data logger including terminal board Optional accessories Order code Product name PP310 ADC-20/24 terminal board for the ADC-20/24 data loggers CC008 Calibration service for ADC-20/24 data loggers Errors and omissions excepted. Pico Technology, PicoLog, PicoLog Cloud and PicoSDK are internationally registered trademarks of Pico Technology Ltd. LabVIEW is a trademark of National Instruments Corporation. Linux is the registered trademark of Linus Torvalds, registered in the U.S. and MathWorks, Inc. Windows and Excel are registered trademarks of Microsoft Corporation in the United States and other countries. GitHub is a registered trademark of GitHub, Inc. MM076.en-4. Copyright © 2004–2021 Pico Technology Ltd. All rights reserved. www.picotech.com UK global headquarters Pico Technology James House Colmworth Business Park St. Neots Cambridgeshire PE19 8YP United Kingdom  +44 (0) 1480 396 395  sales@picotech.com North America regional office Pico Technology

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