Showing posts with label MFC. Show all posts
Showing posts with label MFC. Show all posts

Monday, November 20, 2017

Understanding Mass Flow Controller (MFC) Metrology & Calibration

Mass flow controllers (MFCs) precisely deliver fluids, mainly process gases, into bioreactors and other process systems. The stable, reliable and repeatable delivery of these gases is a function of four key factors:
  • The quality and sophistication of the MFC’s design.
  • The application set-up, which covers the acceptable level of  fluid delivery accuracy a given process requires.
  • Metrology: what specific techniques are used to test, measure and con rm MFC accuracy.
  • Calibration checks: how an MFC is calibrated on an ongoing basis.
It’s common to extensively investigate an MFC’s technical characteristics and capabilities, as well as analyze and ensure that the MFC technology chosen fully satis es each operation’s unique process requirements. Equally important is the role that metrology, which includes testing reference standards and calibration practices, plays in the performance and long-term value of biopharmaceutical process equipment MFCs. In the eBook below, we will provide a deeper understanding of metrology’s role in how MFCs are used and managed in these systems. This includes:
  • The key elements of MFC accuracy and why calibration is important
  • How MFC calibration reference standards are used and why selecting the right standard matters
  • The role that “uncertainty” plays in calibrating MFCs
  • Factors that can lead to improper calibration
Please review the eBook embedded in this post below, or if you prefer, you can download your own PDF copy here - Understanding Mass Flow Controller (MFC) Metrology & Calibration. For more information about MFC's, contact Flow-Tech at or call 410-666-3200.

Monday, August 28, 2017

Installation and Operation of the Brooks Instrument GF40

Brooks Instrument GF40
Brooks Instrument GF40
The Brooks® GF40 (elastomer seal) thermal mass flow controller (MFC) and thermal mass flow meter (MFM) achieves unprecedented performance, reliability, and flexibility in many gas flow measurement and control applications.

At the heart of the GF40 is Brooks’ patented 4th generation MultiFloTM capable device. MultiFlo overcomes a long-standing limitation of many thermal MFCs – when changing gas types, a simple correction factor, such as the ratio of heat capacities between the calibration gas and new gas, cannot account for accuracy-robbing viscosity and density differences. The Brooks MultiFlo database is built on thousands of native gas runs to establish correction functions that account for both thermal and physical differences among gases making the GF40 Series among the most accurate and flexible MFCs/MFMs available today. The Brooks GF40 Series is the perfect choice for customers who use thermal mass flow controllers or thermal mass flow meters on a variety of gases, who need to change gas type frequently, or who need to re-range while preserving gas measurement and control accuracy.

We have provided a Brooks GF40 installation and operation manual below for your convenience. To download your own Brooks GF40 IOM (PDF), click this link.

Thursday, June 29, 2017

Writing LabVIEW™ Programs for Brooks® Mass Flow Controllers (MFCs)

Brooks Instrument has been innovating thermal mass flow technology for decades, continually launching new products and enhancing existing systems to unlock new levels of thermal mass flow precision, responsiveness, accuracy and repeatability.

LabVIEW™ is systems engineering software for applications that require test, measurement, and control with rapid access to hardware and data insights. LabVIEW simplifies hardware integration so that you can rapidly acquire and visualize data sets from virtually any I/O device, whether by NI or a third-party.

Brooks® MFCs are known for:
  • Industry-best range of products to meet widest application needs
  • Innovative MultiFlo™ technology lets one device change gas types and ranges without removing the device from the system and improving actual process gas accuracy
  • Complete product range includes both elastomer sealed and metal sealed options
  • Ultra-high purity devices engineered to satisfy thin film, semiconductor and other high-tech industry requirements.
The video below provides step-by-step instructions on writing a LabVIEW™ program for Brooks Instrument MFC's.

For more information, visit In Maryland call 410-666-3200. In Virginia call 804-752-3450.

Thursday, February 9, 2017

Mass Flow Controller White-paper: A New Class of MFCs with Embedded Flow Diagnostics

Brooks G40
Mass Flow Controller
(courtesy of Brooks Instrument)
A white-paper by Brooks Instrument outlining recent trends in multi-sensor measurements within a mass flow controller are reviewed, with a focus on controller self-diagnostics.

For more information in Maryland or Virginia, visit or call 410-666-3200 (MD) or 804-752-3450 (VA).

Wednesday, September 21, 2016

Connecting Brooks Instrument Thermal Mass Flow Controllers with LabVIEW™

Brooks MFC
Brooks MFC
LabVIEWBrooks Instrument manufactures mass flow controllers with a well earned reputation for accuracy and reliability. LabVIEW™’s integrated development environment for building measurement and control systems is used in laboratory, university, and pilot manufacturing plants around the world. Together, Brooks MFCs and LabVIEW make a great combination for measuring and controlling mass flow, as well as for for data acquisition. Below are some typical communications scenarios used between Brooks MFCs and the LabVIEW™control platform.

Analog Signal Interface

In many situations LabVIEW™ software users also use analog to digital
I/O cards. With analog input cards, users can run their mass flow controllers utilizing a standard 0-5 volt or 4-20 mA analog signaling via LabVIEW™. This is a time-tested, traditional approach and is recommended for applications without the availability of digital control systems.

RS485 Digital Interface

Brooks Instrument mass flow devices configured with RS485 communications (must have the ‘S’ communications option) provide RS485 digital communications via a 15-pin D connector. The RS485 digital signal is passed directly to a computer running LabVIEW™ through a serial RS485 converter. Brooks models GF40, GF80 and SLA Series mass flow controllers are available with the ‘S’ communications option.

Its valuable to note that there is also a free set of VI file for use with LabVIEW from Brooks. These can be loaded directly into the LabVIEW™ application and provide the basics required to create a LabVIEW control interface using the S-Protocol digital command structure. The VI files are available for download from the Brooks Instrument website.

Another communications alternative is using Brook’s Smart DDE (Dynamic Data Exchange) software tool to create links between the LabVIEW™ application and the GF40, GF80 or SLA Series flow, control, and configuration parameters. Additionally, the user can leverage Windows applications (Excel, Word, Access) and programming languages ( C++, C#, Visual Basic) and SCADA programs from suppliers such as Allesco and Millennium Systems International. No knowledge of the mass flow device S-Protocol command structure is required. With Smart DDE, the user gets direct access to the required data fields. While not a complete turnkey option, it greatly reduces the amount of code required to communicate between LabVIEW and the mass flow controller.

DeviceNet Digital Signal Interface

Brooks models GF40, GF80 and SLA, configured for DeviceNet digital communications, can also be controlled via the LabVIEW™ application provided a National Instruments DeviceNet interface card, associated drivers, and software are used. These additional items support the development of application interfaces using LabVIEW™ software for Windows and LabVIEW™ Real-Time.

According to the National Instruments website:

National Instruments DeviceNet for Control interfaces are for applications that manage and control other DeviceNet devices on the network. These interfaces, offered in one-port versions for PCI and PXI, provide full master (scanner) functionality to DeviceNet networks. All NI DeviceNet interfaces include the NI-Industrial Communications for DeviceNet driver software, which features easy access to device data and streamlined explicit messaging. Use a real-time controller such as PXI and NI industrial controllers to create deterministic control applications with the NI LabVIEW Real-Time Module.

As always, discussing the best communication protocol for your application with an authorized applications expert is highly recommended. For more information on mass flow controllers with analog or digital communications contact:

Flow-Tech, Inc.
MD: 410-666-3200
VA: 804-752-3450