Device Calibration Signal Connections for S Series Devices
Self-Calibration
When you self-calibrate your S Series device, no signal connections are necessary. However, values generated on the analog output channels change during the calibration process. If you have external circuitry connected to the analog output channels that is sensitive to these changes, you should disconnect the circuitry before beginning self-calibration.
External Calibration
When externally calibrating your S Series device, connect the signals as described below. Set the reference voltage to the following:
- NI PCI/PXI 6143: between 3.0 V and 4.998 V
- NI PCI/PXI 6115: between 4.995 V and 5.005 V
- NI PCI/PXI 6120: between 4.995 V and 5.005 V
- All other S Series Devices: between 6.0 V and 9.998 V
Typically, you should use a calibrator or other stable voltage source for calibration. Do not use a power supply as its signals are not very stable.
For external calibration, make the following signal connections:
- Connect the positive output of your reference voltage source to ACH0+.
- Connect the negative output of your reference voltage source to ACH0-.