Posted by Graphtec America, Inc. on 27th Jul 2016
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Graphtec dataloggers have long been regarded as the go-to multichannel, portable datalogger for 10 channel and above applications for recording temperature and voltages signals. In this issue of our discovery newsletters, we explore the engineering scaling feature more in depth as we cover the details on how signals from pressure transducers, flow meters, LVDT displacement sensors and various other signals are used in conjunction with the Graphtec GL series. Also, discover how additional testing can be made with various physical parameters like distance, pressure, flow, and speed.
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MONITORING SENSORS WITH ENGINEERING SCALING![]() Multiple sensor manufacturers in the industrial, research and development fields provide output signals that are scaled in voltage DC signals or 4 to 20mA current loops. Graphtec dataloggers are able to scale these signals to its original unit of measurement and record data in their respective scales such as pressure (PSI), length (feet), area, frequency (RPM), energy (W) and flow (gal/s). ![]() The Engineering Unit (EU) setting available on the GL240, GL840s, GL900, and the GL7000 are a direct ratio mapping feature where you set the minimum and the maximum input values from the input signal, and output the EU values in terms of the unit of measurement proportional to that range. |
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Default Measurement Units for Metric Units and Custom Key configurations for Imperial Units
Speed, Flow Levels, and TotalizationTachometer and flow sensors that provide pulse signals for rate and speed of flow can be measured and scaled using the GL series line-up with B-513 logic/pulse cable. Four channels are available for pulse signals in this configuration. “Engineering Unit Setting” is also available for all four channels. When monitoring speed rates from a tachometer or an IR speed sensor, pulse signals can be scaled from the measurement value of sensors available in each rotation to an RPM as shown below.
Totalization of flow rates are provided in total gallon in terms of volume. This can be calculated using the “Instantaneous Count” feature where every pulse signal per sampling rate is chosen (ie. 10 pulse signal per 1 minute interval) and will give you the total volume received under the particular sampling interval (in this case a one minute interval).
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This second installment of our monthly newsletter will focus on the third generation GL840—with its high performance and multi-channel measurement capabilities for handy, portable datalogging. The ability to monitor [...]