Filter
Top Products
Appendix B Analog Input Channel, Gain Settings, and Voltage Calculation
©
National Instruments Corporation B-5 NI-DAQ FRM for PC Compatibles
DAQ Device Gain Settings
Table B-4 lists the valid gain settings for DAQ devices.
Voltage Calculation
AI_VScale and DAQ_VScale calculate voltage from reading as follows:
where:
• maxReading is the maximum binary reading for the given board,
channel, range, and polarity.
• maxVolt is the maximum voltage the board can measure at a gain of
1 in the given range and polarity.
Table B-4.
Valid Gain Settings
Device Valid Gain Settings
AT-MIO-16L, AT-MIO-16DL 1, 10, 100, 500
AT-MIO-16H, AT-MIO-16DH 1, 2, 4, 8
AT-MIO-16F-5, AT-MIO-64F-5,
and most E Series devices
–1 (for a gain of 0.5), 1, 2, 5, 10, 20, 50, 100
All 16XE-50 devices 1, 2, 10, 100
AT-MIO-16X, PCI-MIO-16XE-10, PCI-6031E
(MIO-64XE-10), PCI-6032E (AI-16XE-10),
PCI-6033E (AI-64XE-10), PXI-6030E, and
Lab and 1200 Series devices
1, 2, 5, 10, 20, 50, 100
DAQCard-500/700, 516 and LPM devices gain is ignored because gain is always 1
PCI-6110E, PCI-6111E –2 (for gain of 0.2) 1, 2, 5, 10, 20, 50
–1 (for gain of 0.5)
PCI-4451, PCI-4452, PCI-4551, PCI-4552 –20, –10, 0, 10, 20, 30, 40, 50, 60
(these gains are in units dB)
voltage
reading offset–
maxReading
-------------------------------------------
maxVolt
gain gainAdjust×
-------------------------------------------------
×=