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Engineering Data Acquisition Tools: NI 9218 Universal Input Module

NI 9218 Universal Module

The NI-9218 Module is a 51.2kHz, 24bit, 2-Channel C Series universal analog input module. It provides versatility when developing test plans because it is compatible with accelerometers, powered sensors, full-bridge sensors, voltage and current measurements, and quarter, half, and full bridge strain gauges.

Our test engineers use this module in rugged measurement system designs that require measurements from 12Vdc powered sensors or measurement flexibility. On a recent iTestSystem rotating machinery troubleshooting project, we were able to collect and analyze data from a 12Vdc powered light tachometer and an IEPE accelerometer using only the NI-9218, a cDAQ chassis, and iTestSystem.

For more information about this module, iTestSystem or our testing services, contact Ryan Welker @ (844) 837-8797 x702.

ITM adds NI-9253 Compatibility to iTestSystem

This week we added another module to the iTestSystem compatibility list.  One of our iTestSystem users recently needed to collect data from thirty-two (32), 4 to 20 mA current sensors along with their vibration measurements.  National Instruments (NI) recently introduced a new C-Series current module, the NI-9253, that was a perfect fit for this application.

The NI-9253 module has eight (8) simultaneous sampled (50kHz max), +-20 mA, 24-bit input channels.  It has several diagnostic features to ensure your system is operating nominally at all times with open channel detection, power supply detection, and configurable thresholds. The NI-9253 has eight LEDs that indicate the status of each channel and the power supply so a user can easily determine the system’s status in the field.  The NI-9253 also features a number of programmable hardware filters (Butterworth and comb) to reduce signal noise.

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For advice about using the NI-9253 versus other current modules in iTestSystem monitoring applications or with custom cRIO RT and FPGA control applications contact Mark Yeager or Chase Petzinger.

Strain Gauge Shunt Equivalent Calculations in iTestSystem

When making strain measurements it is important to perform a shunt calibration both before and after the actual measurements are acquired.  Shunt calibrations ensure accurate strain measurements by adjusting the sensitivity or gain of the data acquisition equipment to compensate for leadwire resistance and other scaling errors.

iTestSystem takes advantage of the shunt calibration circuits included in the National Instruments (NI) cDAQ strain modules.  The NI-9235, NI-9236, and NI-9237 strain modules contain an internal shunt resistor that when switched on “shunts” across one leg of the strain circuit’s wheatstone bridge.  When active, the shunt resistor offsets the strain measurement by a constant strain which is calculated using the equivalent shunt calculation.  The equivalent strain/shunt value is dependent on the strain gauge configuration, gauge resistance, shunt resistance, gauge factor, and material properties.

In the latest version of iTestSystem, we added a built-in strain gauge shunt equivalent calculator that can be accessed from the strain configuration page.  This calculator has allowed us to speed up the calibration process and eliminate hand calculation errors.

For a free trial of iTestSystem and the equivalent shunt calculation tool, contact chase.petzinger@itestsystem.com.

ITM adds NI-9242 compatibility to iTestSystem

 

The NI-9242 single ended voltage input module can now be used with the latest version of iTestSystem (16.1). The NI-9242 C-Series module features three (3) voltage inputs plus one (1) neutral input, 24-bit resolution, 250V rms L-N, 400V rms L-L, and 50 kS/s/ch. The measurement range (250V rms L-N or 400V rms L-L) makes it ideal for embedded 120V rms and 240V rms grid measurement applications such as phasor measurements, power metering, power quality monitoring, industrial machinery, motor testing, and transient or harmonic analysis with high-speed (50kHz) simultaneous sampling.

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For advice about using the NI-9242 in stand-alone power quality applications or cRIO power monitoring applications contact Mark Yeager.

ITM adds NI-9246 compatibility to iTestSystem

 

In the latest release of iTestSystem (v 16.1), we are adding the NI-9246 current input module to the compatibility list. The NI-9246 features 3, 22 Arms continuous current inputs, 24-bit resolution, and 50 kS/s/ch in the C Series form factor. The measurement range (22 Arms ) makes it ideal for three phase current measurements from 1A and 5A current transformers. These types of measurements are used in embedded industrial, power generation applications like power quality monitoring and machine condition monitoring.

Click Here for more information about iTestSystem.

For advice about using the NI-9246 in stand-alone power quality applications or cRIO power monitoring applications contact Mark Yeager

ITM adds NI-9203 Compatibility to iTestSystem

We are pleased to announce that the NI-9203 current input module can now be used with iTestSystem and NI CompactDAQ.

The NI-9203 features 8 current inputs , 16-bit resolution, +/- 20 mA range, 200 kS/s maximum sample rate in the C Series form factor.  This module is intended for high-performance control and monitoring applications. The NI-9203 uses multiplexed sampling and an SAR type ADC.

For advice about using the NI-9203 versus other current modules in iTestSystem monitoring applications or with custom cRIO RT and FPGA control applications contact Mark Yeager or Chase Petzinger.

ITM adds NI-9244 compatibility to iTestSystem

 

We are pleased to announce that the NI-9244 single ended voltage input module can now be used with iTestSystem and NI CompactDAQ. The NI-9244 features 3 voltage inputs plus 1 neutral input, 24-bit resolution, 400 Vrms L-N, 800 Vrms L-L, 50 kS/s/ch,  in the C Series form factor.  The wide measurement range (400Vrms L-N or 800Vrms L-L) makes it ideal for high-voltage measurement applications such as phasor measurements, power metering, power quality monitoring, industrial machinery, motor testing, and transient or harmonic analysis with high-speed (50kHz) simultaneous sampling.

Click Here for more information about iTestSystem.

For advice about using the NI-9244 in stand-a-lone power quality applications or cRIO power monitoring applications contact Mark Yeager.