Instrumentation Amplifier Troubleshooting and FAQs

Instrumentation Amplifier, order code INA-BTA, $59
Specifications and User Guide

TROUBLESHOOTING
-Primary Test: Confirm that the gain setting on the sensor is appropriate for the device connected to the Instrumentation Amplifier.
-Secondary Test (when using the INA with a gas chromatograph): If your voltage readings are noisy, you should connect the Earth ground of the Gas Chromatograph to the LabPro ground. To do this, first connect the Voltage Probe that was shipped with your interface to another channel (e.g., CH 2). Then connect the Earth ground to the black lead of the Voltage Probe.

RELATED TIL ENTRIES
TIL 698: What are the nominal gain settings for the Instrumentation Amplifier (order code INA-DIN)?
TIL 640: I am performing an experiment that requires both positive and negative voltages to be measured. When using your ULI with a Voltage Probe, it only reads 0 to 5 volts. What can I do to measure both positive and negative voltages?
TIL 1281: How do you use an Instrumentation Amplifier with a TI Graphing Calculator?
TIL 93: Could I use one of your interfaces to connect the output of my third-party GC to your software?

SPECIFICATIONS
-new order code: INA-BTA
-old order code: INA-DIN
-Gain settings; 150, 75, 7.5, 15, 3, and 1.55%
-Linearity: 1%
-Power = 2.5 mA @ 5VDC
-Frequency Response: 0-10kHz (f3dB)
-Impedance : 1MΩ to ground

range       resolution (µV)
+/- 1V       580.
+/- 200 mV       144
+/- 20 mV       16
0-1 V       380
0-200 mV       76
0-20 mV       8.1

CALIBRATION
-Calibrate? No. The manner in which this device works does not warrant calibration.

GROUNDING
Newer INA-BTA have an external grounding pin that can be used as a chassis ground to limit noise and dc shift.

RELATED VERNIER PRODUCTS
none