NI PXIe-4154 Manual

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CALIBRATION PROCEDURE

NI PXIe-4154

This document contains information for calibrating the NI PXIe-4154 Battery Simulator. For

more information about calibration, visit

Contents

Software Requirements............................................................................................................. 1

Documentation Requirements .................................................................................................. 2

Password................................................................................................................................... 2

Calibration Interval................................................................................................................... 2

Test Equipment......................................................................................................................... 3

Test Conditions......................................................................................................................... 4

Calibration Procedures ............................................................................................................. 5

Initial Setup....................................................................................................................... 5

Verification....................................................................................................................... 5

Voltage Output Verification ..................................................................................... 6

Current Output Verification...................................................................................... 7

Voltage Measurement Verification .......................................................................... 9

Current Measurement Verification........................................................................... 10

Output Resistance Verification (Channel 0 Only).................................................... 14

Load Regulation Verification ................................................................................... 17

Remote Sense Accuracy Verification....................................................................... 19

Transient Response Verification (Channel 0 Only) ................................................. 20

Adjustment................................................................................................................................ 23

Considerations .......................................................................................................... 24

Adjusting Current Measurement .............................................................................. 25

Adjusting Voltage Output......................................................................................... 26

Adjusting Current Output ......................................................................................... 27

Adjusting Voltage Measurement .............................................................................. 29

Adjusting Output Resistance (Channel 0 Only) ....................................................... 30

Where to Go for Support .......................................................................................................... 31

Software Requirements

Calibrating the NI PXIe-4154 requires installing NI-DCPower version 1.5 or later on a Windows

calibration system. You can download the NI-DCPower instrument driver from

. NI-DCPower supports programming an External Calibration in the C and LabVIEW

drivers

application development environments (ADEs). When you install NI-DCPower, you only need

to install support for the ADE that you intend to use.

ni.com/calibration

ni.com/

Table of Contents

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Summary of Contents for NI PXIe-4154

Page 1: Table Of Contents
Adjusting Output Resistance (Channel 0 Only) ............30 Where to Go for Support ......................31 Software Requirements Calibrating the NI PXIe-4154 requires installing NI-DCPower version 1.5 or later on a Windows calibration system. You can download the NI-DCPower instrument driver from ni.com/ .
Page 2: Documentation Requirements
Note If you are running Windows 8, you may not have a Start menu. To access NI programs and documentation, open the Start screen, type the name of the file or folder you want to access, and select the appropriate icon from the search results.
Page 3: Test Equipment
Test Equipment NI recommends that you use the equipment in Table 1 for calibrating the NI PXIe-4154. Table 1. Recommended Equipment Recommended Parameter Equipment Model Measured Minimum Requirements Two Digital NI PXI-4071 All Parameters Voltage: better than ±50 ppm Multimeters (DMM) accuracy and better than 30 µV...
Page 4: Test Conditions
Keep relative humidity between 10% and 70%, noncondensing. • Allow a warm-up time of at least 30 minutes after the NI-DCPower driver is loaded. Unless manually disabled, the NI-DCPower driver automatically loads with the operating system and enables the device. Allow the recommended warm-up time for all additional test equipment.
Page 5: Calibration Procedures
Reverification—Repeat the verification procedure to ensure that the device is operating within the published specifications after adjustment. Initial Setup Refer to the NI DC Power Supplies and SMUs Getting Started Guide for information about how to install the software and hardware and how to configure the device in MAX. Verification This section provides information for verifying the following specifications for the NI PXIe-4154.
Page 6: Voltage Output Verification
Voltage Output Verification To verify the voltage output of an NI PXIe-4154, compare a range of requested voltage test points to the actual voltage measurements at the output using an external DMM. The external DMM should be zeroed prior to each reading when measuring current output using a 0.1 Ω shunt and voltage output for 0 V level.
Page 7: Current Output Verification
8.0092 V Current Output Verification To verify the current output of an NI PXIe-4154, compare a range of requested current test points to the measurements of the actual current at the output. Current output is calculated by dividing the voltage measured across the precision shunt by the actual resistance of the precision shunt.
Page 8 30 mA, 22.5 mA, 15.0 mA, 7.5 mA, and 0.1 mA outputs from the NI PXIe-4154 while setting the voltage level to its maximum value. Take measurements using the DMM as a voltmeter at each point, dividing by the characterized value of the precision shunt each time.
Page 9: Voltage Measurement Verification
DMM and the NI PXIe-4154. For example, in the 6 V range on Channel 0, program the NI PXIe-4154 to output 6 V, 4.5 V, 3 V, 1.5 V, and 0 V. Take voltage measurements at each test point using the DMM. Compare these values to the voltage measurements taken at each test point using the NI PXIe-4154.
Page 10: Current Measurement Verification
To verify positive currents, use the NI PXIe-4154 channel as a source. For example, in the 1.5 A range on Channel 1, program the NI PXIe-4154 to output 375 mA, 750 mA, 1.125 A, and 1.5 A while setting the voltage limit to its maximum value. Use an external DMM/precision shunt and the NI PXIe-4154 to take a current measurement at each test point.
Page 11 After requesting a new current, wait one second to take a measurement with an external DMM and NI PXIe-4154 to ensure the system has adequate time to settle. The verification limits for current measurement depend on the actual current measured with an external DMM, and are expressed as a percentage of DMM reading plus offset current.
Page 12 Point Found Left Limit Found Left 30 mA 100 Ω -30 mA 0.04% + 7 µA -22.5 mA -15 mA -7.5 mA 0 mA 7.5 mA 15 mA 22.5 mA 30 mA 12 | ni.com | NI PXIe-4154 Calibration Procedure...
Page 13 100 mΩ 0.12% + 0.35 mA 375 mA 0.12% + 0.35 mA 750 mA 0.17% + 0.35 mA 1.125 A 0.245% + 0.35 mA 1.5 A 0.32% + 0.35 mA NI PXIe-4154 Calibration Procedure | © National Instruments Corporation | 13...
Page 14: Output Resistance Verification (Channel 0 Only)
-0.04 Ω, 0 Ω, 0.25 Ω, 0.5 Ω, 0.75 Ω, and 1 Ω outputs from the NI PXIe-4154. Configure the NI PXIe-4154 to output 4 V with a current limit of 3 A. After requesting a new output resistance, wait one second to take a...
Page 15 Calculate the output resistance using the following formula: Output Resistance (Ω) = (V ) / (I Output resistance is requested by the NI DCPower Output Resistance Note Property Node. NI PXIe-4154 Calibration Procedure | © National Instruments Corporation | 15...
Page 16 16 | ni.com | NI PXIe-4154 Calibration Procedure...
Page 17: Load Regulation Verification
2.7 A 1.5 A 1.5 A 0.015 A 1.35 A Record the DMM voltage at the Output + and Output - terminals of the NI PXIe-4154 (V in the following table. Table 8. NI PXIe-4154 Regulation Verification Points Voltage Voltage...
Page 18 4.4 V 1.5 A 0.75 A 100 mΩ Record the DMM voltage at the Output + and Output - terminals of the NI PXIe-4154 (V in the following table. Table 10. NI PXIe-4154 Measured Current Load Regulation Verification Points Current Change...
Page 19: Remote Sense Accuracy Verification
The test passes if the Current Change is less than or equal to the calculated Current Change Limit. Remote Sense Accuracy Verification To verify the remote sense accuracy of an NI PXIe-4154, use a test circuit of three resistors that simulate voltage drop between the device and a load. Channels 0 and 1 should be tested separately, using the same method.
Page 20: Transient Response Verification (Channel 0 Only)
Connect the resistors to the Output + and Output - terminals on the NI PXIe-4154, as shown in Figure 8. Connect the remote sense leads directly across the 200 Ω resistor (R Set the voltage level and current limit to the values listed in Table 12.
Page 21 -20 mV 1 MΩ ≥200 MS/s Edge Edge Trigger Configure the NI PXIe-4154 according to the settings listed in the following table. Table 15. NI PXIe-4154 Settings V Range I Range V Level I Limit Measure the transient response recovery time and transient response dip, as displayed in Figure 10.
Page 22 For more information about transient response, refer the Transient Response Note topic in the Fundamentals section of the NI DC Power Supplies and SMUs Help. Figure 10. Example Transient Response Dip and Transient Response Recovery Time Waveform 20 us/div Measurement noise can be improved by software filtering or averaging the Note oscilloscope.
Page 23: Adjustment
• Output resistance accuracy The adjustment components of the NI-DCPower API require the NI PXIe-4154 be programmed using the voltage output function (this is the default configuration). You must adjust each range with a separate call to an niDCPower Cal Adjust VI or function.
Page 24: Considerations
Measurements made by external equipment required for adjustment also occur during this step. For assistance configuring the NI PXIe-4154 to a particular output or measurement mode, refer to the example programs installed with NI-DCPower. Call niDCPower Cal Adjust function(s): When the measurements required for adjustment of a range are complete, call one of the niDCPower Cal Adjust VIs or functions to calculate new calibration coefficients and store them in memory on the host.
Page 25: Adjusting Current Measurement
For negative current adjustment points, an external current source is required to provide the necessary current. The voltage level for the NI PXIe-4154 should be set to 0 V. Refer to Table 1 for external current source equipment recommendations and requirements.
Page 26: Adjusting Voltage Output
For example, the 6 V range on Channel 0 requires the adjustment application to separately request 0.1 V, 3 V, and 6 V outputs from the NI PXIe-4154. Take measurements using the external DMM at each voltage test point.
Page 27: Adjusting Current Output
Adjusting Current Output To adjust current output of a calibrated NI PXIe-4154, compare a set of requested current test points to measurements of the actual current at the output by a DMM/precision shunt. Refer to Figure 3 for a connection diagram with a 100 m Ω precision shunt. Refer to Figure 4 for a connection diagram with a 100 Ω...
Page 28 Refer to Table 22 for some parameters specific to adjustment applications for this VI. Refer to the NI DC Power Supplies and SMUs Help for more information about programming references common to VIs within the NI-DCPower API. Adjust positive and negative current polarities with separate calls to the...
Page 29: Adjusting Voltage Measurement
Refer to Table 23 for a list of the voltage test points that you must request and measure with an external DMM and the NI PXIe-4154 to adjust a given range. For example, the 8 V range on Channel 1 requires the adjustment application to separately request 0.1 V, 4 V, and 8 V outputs from the NI PXIe-4154.
Page 30: Adjusting Output Resistance (Channel 0 Only)
Adjusting Output Resistance (Channel 0 Only) To adjust the output resistance of a calibrated NI PXIe-4154, compare a set of requested output resistance test points to measurements of the actual resistance at the output calculated using two external DMMs and a precision shunt. Use an electronic load to control the output current. Refer to Figure 7 for a connection diagram.
Page 31: Where To Go For Support
Refer to Table 26 for parameters specific to adjustment applications for this VI. Refer to the NI DC Power Supplies and SMUs Help for more information about programming references common to VIs within the NI-DCPower API. Figure 16. Figure 15. NI-DCPower Cal Adjust Output Resistance VI Block Diagram Table 26.
Page 32 National Instruments Patents Notice at ni.com/patents. You can find information about end-user license agreements (EULAs) and third-party legal notices in the readme file for your NI product. Refer to the Export Compliance Information at ni.com/legal/export-compliance for the NI global trade compliance policy and how to obtain relevant HTS codes, ECCNs, and...