MeterGrapher is a compact, efficient, PC based application for polling values from meters that have a modbus communications capability. The polled values are displayed graphically, including visual alarms when values are outside defined limits, and written to log files that can be further analysed in MeterGrapher, or exported to other systems.
Originally designed for use with CDI Meters Inc. flow and pressure meters, it can now log any meter that uses the modbus protocol, e.g. Veris power meters. To log other meter types you may have to supply meter details to CDI Meters Inc.
Gathering values from meters in diverse locations to give a single, real-time display facilitates the rapid identification of fault conditions such as air leaks. Analysis of historical data can show that some equipment is working less efficiently than similar equipment elsewhere, and can show trends in consumption. This information can then be used to manage maintenance and operation activities to reduce consumption and thus costs.
MeterGrapher is available from the Downloads
At present MeterGrapher, and limited support, is free of charge.
Any modern Windows-based PC with either an Ethernet connection to a router, or spare USB ports, or wireless connectivity. A screen resolution of 1024 x 768 or better is recommended. The software has been extensively tested on Windows XP and later versions
Meters are connected, via COM/USB, TCP/IP or wireless, using industry standard adapters, typically one for every 50 meters to be polled.
If the connection is COM/USB the PC should be no more than 4000 feet from the furthest meter. If connecting via TCP/IP the PC can be anywhere in the world! Wireless connections have limitations, depending on the topography of the site.
No. It has been designed for use by engineers with modest IT skills. Setting up the adapters requires a little more knowledge, but the documentation provided on this website, (including the Quick Start Guide), and from the adapter manufacturer, give full guidance. If you require remote access over the internet you may well need help from the IT Department!
At present up to 250 meters can be logged at once.
This depends to some extent on the nature of the connections, but logging intervals can be down to 200ms per meter.
Yes. MeterGrapher is not hungry for PC resources, unless a very rapid logging rate is invoked.
If the PC crashes while logging, information is lost. However a StartLog utility is provided and this can be added to the PC’s start-up so that logging resumes as soon as the PC is rebooted.
Yes. The logs are compact tab-delimited text files.
Yes. The can be imported as tab-delimited text files (See also ‘What is AnswerGrapher’ and ‘Can I calculate Usages over defined periods’ below).
AnswerGrapher is an Excel workbook supplied as part of the MeterGrapher installation. It facilitates the import of a specific log file and provides three types of information:
1. A display of the data highlighting blanks (no value returned from the meter) and extreme values (more than 3SD from the mean).
2. Meta-data: date and time of logging start / finish, number of meters, logging interval, number of readings, counts of blank and extreme values.
3. A graph
This is a valuable tool if the user wants a quick view of the log files.
Comprehensive user documentation, including annotated screen-shots, is provided on-line. The software writes diagnostic files that can help in resolving issues, particularly those related to communications between the PC and the adapters / meters. In addition telephone and e-mail support is available from the development team.
There is no native application, but users could run windows on the Mac, and MeterGrapher may run on that, but this has not been tested. This is the link that shows how to run Windows on a Mac – http://store.apple.com/uk/browse/guide/windows.
Yes. MGUsageCalcs is an Excel Workbook that calculates Usages for daily, weekly, monthly and user-defined periods. You must set MeterGrapher to log Usage.
Yes. In most cases a single click will import the data and display it as required, and more complex analyses are straightforward. Full instructions are provided in the Workbooks.
Yes. If you are a new user with fewer than 50 CDI meters the guide will take you the shortest route to start logging. See Quick Start Guide (annotated screen-shots
or downloadable pdf
Yes. The settings on the Meters and on MeterGrapher can be changed. Note that Odd parity is not supported, and meters always send 2 stop bits. See Parity
Currently scfm, Nm3/min and Nm3/hr are available. Specify the chosen units when ordering CDI Meters. Values are held within the meters and can be changed – Contact CDI Meters. MeterGrapher detects the units used in the meters and reports the settings it is using. Note that all meters must use the same units. See also Units Selection