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NI 9227 Calibration Procedure

Initial Setup

Complete the following steps to set up the NI 9227.
1.

Install NI-DAQmx.

2.

Make sure the NI cDAQ-9178 power source is not connected.

3.

Connect the NI cDAQ-9178 to the system safety ground.
a.

Attach a ring lug to a 14 AWG (1.6 mm) wire.

b.

Connect the ring lug to the ground terminal on the side of the NI cDAQ-9178 using 
the ground screw.

c.

Attach the other end of the wire to the system safety ground.

4.

Install the module in slot 8 of the NI cDAQ-9178 chassis. Leave slots 1 through 7 of the 
NI cDAQ-9178 chassis empty.

5.

Connect the NI cDAQ-9178 chassis to your host computer.

6.

Connect the power source to the NI cDAQ-9178 chassis.

7.

Launch Measurement & Automation Explorer (MAX).

8.

Right-click the device name and select 

Self-Test

 to ensure that the module is working 

properly.

Verification

The following performance verification procedures describes the sequence of operation and test 
points required to verify the NI 9227 and assumes that adequate traceable uncertainties are 
available for the calibration references.

Summary of Contents for NI 9227

Page 1: ...Matching Verification 6 Phase Matching Verification 8 Adjustment 9 Accuracy Adjustment 9 EEPROM Update 10 Reverification 10 Accuracy Under Calibration Conditions 10 Worldwide Support and Services 11 S...

Page 2: ...ctions and Specifications NI 9227 specific information specifications and calibration interval NI DAQmx Readme Operating system and application software support in NI DAQmx LabVIEW Help LabVIEW progra...

Page 3: ...device Use twisted pairs wire to eliminate noise and thermal offsets Maintain an ambient temperature of 23 C 5 C The device temperature will be greater than the ambient temperature Keep relative humid...

Page 4: ...em safety ground 4 Install the module in slot 8 of the NI cDAQ 9178 chassis Leave slots 1 through 7 of the NI cDAQ 9178 chassis empty 5 Connect the NI cDAQ 9178 chassis to your host computer 6 Connect...

Page 5: ...Figure 1 Accuracy Verification Connections 3 Set the calibrator current to a Test Point value indicated in Table 4 4 Set the calibrator to Operate mode OPR 5 Acquire and average samples a Create and c...

Page 6: ...are derived using the values in Table 13 Gain Matching Verification Complete the following procedure to determine the As Found status of the NI 9227 1 Connect the NI 9227 to the function generator as...

Page 7: ...hannel to channel gain difference to the maximum limit of 0 13 dB 7 Disable the function generator 8 Disconnect the calibrator from the device If the Gain Matching verification procedure determines th...

Page 8: ...he function generator 5 Acquire samples a Create and configure an AI current task according to Table 9 b Configure the task timing according to Table 10 c Start the task Table 8 Function Generator Con...

Page 9: ...peration required to adjust the NI 9227 Accuracy Adjustment Complete the following procedure to adjust the accuracy performance of the NI 9227 Note Completing the Accuracy adjustment procedure adjusts...

Page 10: ...g an external calibration setting the C Series calibration temperature and closing the external calibration Reverification Repeat the Verification section to determine the As Left status of the device...

Page 11: ...d in Table 4 are derived using the values in Table 13 Note For operational specifications refer to the most recent NI 9227 Operating Instructions and Specifications online at ni com manuals Worldwide...

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