background image

6

|

ni.com

|

NI PXIe-4340 Calibration Procedure

Allow a warm-up time of at least 15 minutes to ensure that the PXIe-4340 measurement 
circuitry is at a stable operating temperature.

Ensure that the PXI/PXI Express chassis fan speed is set to HIGH, that the fan filters are 
clean, and that the empty slots contain filler panels. For more information, refer to the 

Maintain Forced-Air Cooling Note to Users

 document available at 

ni.com/manuals

.

Initial Setup

Refer to the 

NI PXIe-4340 and TB-4340 Installation Guide and Terminal Block Specifications

 

for information about how to install the software and hardware and how to configure the device 
in NI Measurement & Automation Explorer (MAX).

Note

When a device is configured in MAX, it is assigned a device identifier. Each 

function call uses this identifier to determine which DAQ device to verify. This 
document uses 

Dev1

 to refer to the device name. In the following procedures, use the 

device name as it appears in MAX.

Accuracy Verification

The following performance verification procedures describe the sequence of operations and 
provides the test points required to verify the PXIe-4340. The verification procedures assume 
that adequate traceable uncertainties are available for the calibration references.

The PXIe-4340 has four independent analog input channels. You can verify the accuracy of any 
or all of the channels depending upon your desired test coverage.

Excitation Accuracy

To connect the TB-4340 for excitation verification, install the PXIe-4340 and the TB-4340 in 
the PXI Express chassis according to the instructions in the 

NI PXIe-4340 and TB-4340 User 

Guide and Terminal Block Specifications

. Do not use the excitation verification terminals as 

they are only used for gross field checks and will introduce additional errors.

Complete the following steps to verify the excitation accuracy of the PXIe-4340:
1.

Connect the PXI-4070 across the EX+ and EX- terminals of the channel to be verified.

2.

Refer to Table 3 to configure the PXI-4070 and acquire a voltage measurement for DC 
Offset.

Содержание PXIe-4340

Страница 1: ...rldwide Support and Services 10 Software Calibrating the NI PXIe 4340 requires the installation of NI DAQmx on the calibration system Driver support for calibrating the PXIe 4340 was first available i...

Страница 2: ...nformation NI PXIe 4340 Device Specifications PXIe 4340 specifications and calibration interval NI DAQmx Readme Operating system and application software support in NI DAQmx NI DAQmx Help Information...

Страница 3: ...not available select a substitute using the requirements listed in Table 1 Table 1 Recommended Equipment for PXIe 4340 Verification Equipment Recommended Model Requirements DMM PXI 4070 Use a DMM that...

Страница 4: ...he TB 4340 Figure 1 TB 4340 Circuit Board Parts Locator Diagram C1 B1 A1 COPYRIGHT 2015 S N 159026B 01L NI TB 4340 EX EX RS RS AI AI CT AIGND CHANNEL 0 EXCITATION VERIFICATION EX EX RS RS AI AI CT AIG...

Страница 5: ...minate noise and thermal offsets Maintain an ambient temperature of 23 C 5 C The PXIe 4340 temperature will be greater than the ambient temperature Maintain an internal device temperature range of Tca...

Страница 6: ...the device name as it appears in MAX Accuracy Verification The following performance verification procedures describe the sequence of operations and provides the test points required to verify the PXI...

Страница 7: ...zero Once ADC Calibration On Input Impedance 10 M DC Noise Rejection High Order Number of Averages 10 Power Line Frequency Dependent upon the local power line characteristics Table 4 PXI 4070 Voltage...

Страница 8: ...hese values the devices passes the DC Offset test at this Excitation Voltage Table 5 PXIe 4340 AI LVDT Measurement Setup Configuration Value Channel Name Dev1 aix where x refers to the channel number...

Страница 9: ...8 Leave all other pins disconnected 2 Configure the channel as shown in Table 5 for 7 Vrms excitation 3 Perform the configured AI LVDT measurement and average the acquired measurements 4 Compare the r...

Страница 10: ...ompleted initialize and close a calibration sessions for Dev1 using the DAQmx Initialize External Calibration VI and the DAQmx Close External Calibration VI Specifications Refer to the NI PXIe 4340 De...

Отзывы: