NI 9205/9206 Calibration Procedure
6
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4.
Adjustment Procedure
—Perform an external calibration that adjusts
the device calibration constants with respect to a known voltage
source.
5.
Perform another verification to ensure that the device operates within
its specifications after adjustment.
The first four steps are explained in the following sections.
Initial Setup
You must configure the device in Measurement & Automation Explorer
(MAX) to communicate with NI-DAQmx.
Complete the following steps to configure a device in MAX:
1.
Install the NI-DAQmx driver software.
2.
Make sure that no power is connected to the module terminals. If the
system is in a nonhazardous location, the chassis power can be on
when you install the module.
3.
Insert the module into an available slot in the cDAQ-9172 chassis.
4.
Launch MAX.
5.
Right-click the device name and select
Self-Test
to ensure that the
device is working properly.
Note
When a device is configured with MAX, it is assigned a device name. Each function
call uses this device name to determine which DAQ device to calibrate. This document uses
dev1
to refer to the device name. In the following procedures, use the device name as it
appears in MAX.
Self-Calibration
Self-calibrate the device before completing the first verification, after the
device has warmed up for the recommended time period.
DAQmxSelfCal
(DAQmx Self Calibrate VI), as shown in the following table, measures the
onboard reference voltage of the device and adjusts the self-calibration
constants to account for any errors caused by short-term fluctuations in the
operating environment. When you self-calibrate a device, no external
signal connections are necessary.
NI-DAQmx Function Call
LabVIEW Block Diagram
Call
DAQmxSelfCal
with the
following parameters:
deviceName
:
dev1
