NATIONAL INSTRUMENTS PXIe-4136 Single Channel System Source Measure Unit User Manual

NATIONAL INSTRUMENTS PXIe-4136 Single Channel System Source Measure Unit

Product Information

The NI PXIe-4136 is a Single-Channel System Source Measure Unit (SMU). It is a versatile instrument used for measuring and sourcing voltage and current in various applications. The PXIe-4136 offers high accuracy and resolution, making it suitable for precision measurements.

Product Usage Instructions

1. Software Installation: To use the PXIe-4136,you need to install the NI-DCPower software. Make sure to onlyinstall support for the application software you intend to use. Youcan download the required software from ni.com/downloads.
2. Calibration Support: Access calibrationsupport in the following locations based on your software:
   • LabVIEW: NI-DCPower Calibration palette
   • LabWindows/CVI: NI-DCPower function panel (niDCPower.fp)
3. Related Documentation: For more information,visit ni.com/manuals to access the latest versions of the productdocumentation.
4. Password: The default password forpassword-protected operations is “NI”.
5. Calibration Interval: It is recommended tocalibrate the PXIe-4136 once every year.
6. Test Equipment: The following table lists therecommended equipment for performance verification and adjustmentprocedures. If the recommended equipment is not available, selectsubstitutes that meet the minimum specifications.

Required Equipment| Recommended Model(s)| Parameter Measured| Minimum Specifications
---|---|---|---
Digital multimeter (DMM)| Keysight 3458 A| All parameters except remote sense accuracy| Voltage:
1 M current shunt| | |
1 current shunt| | |
3 k resistor| | |

Required Software

Calibrating the PXIe-4136 requires you to install the following software on the calibration system:

• NI-DCPower. The PXIe-4136 was first supported in NI-DCPower 1.
• Supported application development environment (ADE)—LabVIEW or LabWindows™/CVI™.
• Supported operating system—Windows.

When you install NI-DCPower, you need to install support only for the application software that you intend to use. Access calibration support in the locations shown in the following table:

You can download all required software from ni.com/downloads.

Related Documentation

For additional information, refer to the following documents as you perform the calibration procedure:

• NI PXIe-4136 Getting Started Guide
• NI DC Power Supplies and SMUs Help
• NI PXIe-4136 Specifications
• NI-DCPower Readme
• LabVIEW Help

Visit ni.com/manualsfor the latest versions of these documents.

Password

The default password for password-protected operations is NI.

Calibration Interval

Recommended calibration interval                   1 year

Test Equipment

The following table lists the equipment NI recommends for the performance verification and adjustment procedures. If the recommended equipment is not available, select a substitute using the minimum requirements listed in the table.

Table 1. Required Equipment for Calibration

Required Equipment| Recommended Model(s)| Parameter Measured| Minimum Specifications
---|---|---|---
Digital multimeter (DMM)| Keysight 3458 A| All parameters except remote sense accuracy| Voltage: <±9 ppm accuracy and <100 nV resolution.

Current: <±25 ppm accuracy and <10 pA resolution.

1 MΩ current shunt| IET Labs SRL-1M/1Triax| 1 μA and 10 μA current accuracy| <4 ppm accuracy,

<0.2 ppm / °C tempco.

1 Ω current shunt| Ohm Labs CS-1| 1 A current accuracy| <65 ppm accuracy,

<5 ppm / °C tempco.

3 kΩ resistor| Vishay PTF563K0000BYEB| Remote sense accuracy| 0.1% 250 mW

Test Conditions

Follow the setup and environmental information below to ensure the PXIe-4136 meets the published specifications. Test limits in this document are based on the June 2015 edition of the NI PXIe-4136 Specifications.

• Ensure that the safety interlock terminal is closed during verification

• Keep cabling as short as possible. Long cables act as antennas, picking up extra noise that can affect

• Verify that all connections to the PXIe-4136, including front panel connections and screws, are

• Ensure that the PXI chassis fan speed is set to HIGH, that the fan filters (if present) are clean, and that the empty slots contain slot blockers and filler panels. For more information about cooling, refer to the Maintain Forced-Air Cooling Note to Users document available at com/manuals.

• Allow a warm-up time of at least 30 minutes after the chassis is powered on and NI-DCPower is loaded and recognizes the PXIe-4136. The warm-up time ensures that the PXIe-4136 and test instrumentation are at a stable operating temperature.

• Use shielded copper wire for all cable connections to the device. Use twisted-pair wire to eliminate noise and thermal

• To ensure the system has had adequate time to settle, wait one second after requesting a new current or voltage or after changing a load before taking a measurement.

• Keep relative humidity between 10% and 70%,

• When making measurements, configure the following aperture time-related settings:

  • Set the niDCPower Aperture Time property or NIDCPOWER_ATTR_APERTURE_TIME attribute to 2 power-line cycles (PLCs) on the device.
  • Set the niDCPower Aperture Time Units property or NIDCPOWER_ATTR_APERTURE_TIME_UNITS to power line cycles.

• Set the niDCPower Configure Power Line Frequency property or the NIDCPOWER_ATTR_POWER_LINE_FREQUENCY attribute to either 50 or 60 depending on the frequency of the AC power line in your

• Do not use the NI-DCPower Soft Front Panel (SFP) to request test points for any adjustment functions because you cannot set aperture time using the

• Ensure that properties or attributes for the device that are not specified in calibration procedures are set to their default

• When making measurements, configure any specified digital multimeters (DMMs) with the best available ranges and measurement settings for each specified test

• For verification procedures, maintain an ambient temperature of 23 °C ± 5 °C. Maintain an ambient temperature of 23 °C ±5 °C. Maintain an internal device temperature range of Tcal ±1 °C.1

• For adjustment procedures, maintain an ambient temperature of 23 °C ±1 °C. The PXIe-4136 internal temperature is greater than the ambient temperature.

Safety Guidelines for System Operation

Caution Hazardous voltages of up to the maximum voltage of the PXIe-4136 may appear at the output terminals if the safety interlock terminal is closed. Open the safety interlock terminal when the output connections are accessible. With the safety interlock terminal open, the output voltage level/limit is limited to ±40 V DC, and protection will be triggered if the voltage measured between the device HI and LO terminals exceeds ±(42 Vpk ±0.4 V).

Caution Do not apply voltage to the safety interlock connector inputs. The interlock connector is designed to accept passive, normally open contact closure connections only.

To ensure a system containing the PXIe-4136 is safe for operators, components, or conductors, take the following safety precautions:

• Ensure proper warnings and signage exists for workers in the area of
• Provide training to all system operators so that they understand the potential hazards and how to protect themselves.
• Inspect connectors, cables, switches, and any test probes for any wear or cracking before each use.
• Before touching any of the connections to the high terminal or high sense on the PXIe-4136, discharge all components connected to the measurement path. Verify with a DMM before interaction with connections.

As-Found and As-Left Limits

The as-found limits are the published specifications for the device. NI uses these limits to determine whether the device meets the device specifications when it is received for calibration.
The as-left limits are equal to the published NI specifications for the device, less guard bands for measurement uncertainty, temperature drift, and drift over time. NI uses these limits to determine whether the device will meet the device specifications over its calibration interval

Calibration Overview

Calibration includes the steps shown in the following figure:

1. Initial setup—Install the PXIe-4136 and configure it in Measurement & Automation Explorer (MAX).
2. Verification—Verify the existing operation of the PXIe-4136. This step confirms whether the device is operating within the published specifications prior to adjustment.
3. Adjustment—Adjust the calibration constants of the PXIe-4136.
4. Reverification—Repeat the Verification procedure to ensure that the device is operating within the published specifications after

Verification

The performance verification procedures assume that adequate traceable uncertainties are available for the calibration references.
You must complete all verification procedures in the specified order.
You do not need to separately verify both measurement and output. The architecture of the PXIe-4136 ensures that if measurement is accurate, then output is as well, and vice versa.

Related Information

Reverification on page 24

Repeat the Verification section to determine the as-left status of the PXIe-4136.

Self-Calibrating the PXIe-4136 Complete the following steps to self-calibrate the PXIe-4136.

1. Disconnect or disable all connections to the PXIe-4136.
2. Allow the PXIe-4136 30 minutes to warm up with the PXI chassis fans set to
3. Initialize an NI-DCPower
4. Call the self-calibration
5. Close the NI-DCPower

Testing the Safety Interlock

In order to ensure safe operation of the PXIe-4136, test the safety interlock for proper functionality before completing any verification procedures.

Testing with an Application Development Environment

1. Disconnect the output connector from the PXIe-4136 front
2. Ensure that the safety interlock input on the test fixture is
3. Set the niDCPower Output Function property or NIDCPOWER_OUTPUT_FUNCTION attribute to DC Voltage for the PXIe-4136.
4. Set the voltage level range to 200 V, and set the voltage level to 42.4
5. Set the current limit range to 1 mA, and set the current limit to 1
6. Initiate the
7. Verify that the Voltage Status Indicator is
8. Open the safety interlock input using the test
9. Verify that the Voltage Status Indicator is
10. Reset the device using the niDCPower Reset VI or the niDCPower Reset
11. Verify that the Voltage Status Indicator is green.

Caution If the PXIe-4136 fails the safety interlock test, discontinue use of the device and contact an authorized NI service representative to request a Return Material Authorization (RMA).

Connecting and Configuring Equipment for Voltage Verification

1. Make the necessary connections for this procedure, as shown in the following figure:
   Figure 2. Voltage Verification or Adjustment Connection Diagram

2. Set the niDCPower Output Function property or NIDCPOWER_OUTPUT_FUNCTION attribute to DC Voltage for the PXIe-4136.

Verifying Voltage Measurement and Output
Compare a set of voltages measured by a DMM to the voltage test points requested by the PXIe-4136.
Refer to the following table as you complete the following steps.
Verify ranges in the order listed in the table.

Table 2. Voltage Output and Measurement Verification

Level Range| Limit Range and Limit| Test Point| As-Found Measurement Test Limit (% of Voltage + Offset)| As-Left Measurement Test Limit (% of Voltage

+ Offset)

---|---|---|---|---
600 mV| 1 mA| -600 mV| 0.020% + 100 μV| 0.0047% + 38.3 μV
0 mV
600 mV
6 V| 1 mA| -6 V| 0.020% + 640 μV| 0.0032% + 355 μV
0 V
6 V
20 V| 1 mA| -20 V| 0.022% + 2 mV| 0.0052% + 825 μV
0 V
20 V
200 V| 1 mA| -200 V| 0.025% + 20 mV| 0.0081% + 10 mV
0 V
200 V

1. Set the first specified level range, limit range, and limit on the PXIe-4136.

2. Set the niDCPower Sense property or NIDCPOWER_ATTR_SENSE attribute to Local.

3. Measure the internal device temperature and perform self-calibration if

   • If the internal device temperature exceeds Tcal ±1 °C, wait up to five minutes for the temperature to stabilize to within Tcal ±1 °C.
   • If after five minutes the stable temperature still exceeds Tcal ±1 °C, call the self- calibration VI or

4. Set the level on the PXIe-4136 to the first specified test

5. Compare a DMM voltage measurement to the voltage measurement test

   • Take a voltage measurement using the

   • Calculate the lower and upper voltage measurement test limits using the following formula:
     Voltage Measurement Test Limits = Test Point ± (| Test Point | * % of Voltage + Offset )

   • Verify the DMM measurement falls within the test

6. If more than one test point per level range is specified, repeat the previous steps for each test point, from setting the level to the test point on the PXIe-4136 up to this

7. If more than one level range is specified, repeat the previous steps using the values specified in each level

Verifying Remote Sense Voltage Offset

Use the PXIe-4136 in constant current mode with a test circuit to simulate the voltage drop between the device and a load.

Refer to the following table as you complete the following steps.

Verify ranges in the order listed in the table. Use the same connections as the previous test.

Table 3. Remote Sense Voltage Offset Verification

Level Range| Limit Range and Limit| Test Point| As-Found Measurement Test Limits| As-Left Measurement Test Limits
---|---|---|---|---
600 mV| 1 mA| 0 V| ±100 μV| ±38.3 μV
6 V| ±640 μV| ±355 μV
20 V| ± 2 mV| ±825 μV
200 V| ±20 mV| ±10 mV

1. Set the first specified level range, limit range, and limit on the PXIe-4136.
2. Set the niDCPower Sense property or NIDCPOWER_ATTR_SENSE attribute to Remote.
3. Set the level on the PXIe-4136 to the first specified test
4. Compare a DMM voltage measurement to the voltage measurement test
5. Take a voltage measurement using the
6. Verify the DMM measurement falls within the test
7. If more than one test point per level range is specified, repeat the previous steps for each test point, from setting the level to the test point on the PXIe-4136 up to this
8. If more than one level range is specified, repeat the previous steps using the values specified in each level

Verifying Voltage Remote Sense

Use the PXIe-4136 in constant current mode with a test circuit to simulate the voltage drop between the device and a load.

Refer to the following table as you complete the following steps.

Complete this procedure only after successfully completing all previous verification procedures.

Table 4. Remote Sense Voltage Output Verification

Level Range| Limit Range and Limit| Test Point| Load 1| Load 2| Voltage Remote Sense Test Limit
---|---|---|---|---|---
Load 1| Load 2
1 mA| 600 mV| 0 mA| 3 kΩ| 3 kΩ| ≤6 µV| ≤6 µV
1 mA

1. Set the niDCPower Output Function property or NIDCPOWER_OUTPUT_FUNCTION attribute to DC Current for the PXIe-4136.

2. Set the niDCPower Sense property or NIDCPOWER_ATTR_SENSE attribute to Remote.

3. Make the necessary connections for this procedure, as shown in the following figure:
   Figure 3. Voltage Remote Sense Diagram, Part I2

4. Set the first specified level range, limit range, and limit on the PXIe-4136.

5. Measure the internal device temperature and perform self-calibration if

6. If the internal device temperature exceeds Tcal ±1 °C, wait up to five minutes for the temperature to stabilize to within Tcal ±1 °C.

7. If after five minutes the stable temperature still exceeds Tcal ±1 °C, call the self- calibration VI or

8. Set the level on the PXIe-4136 to the first specified test

9. Take a voltage measurement using the PXIe-4136.

10. Record the voltage from the previous step as V1.

11. Repeat the previous three steps for the other test point specified in the range. This time, record the value as V2.

12. Calculate the remote sense error using the following formula, and then record the Remote Sense Error = | V 2 – V 1|

13. Verify that the recorded value falls within the test

14. Repeat the previous steps. This time, make the necessary connections as shown in the following figure:
    Figure 4. Voltage Remote Sense Diagram, Part II3

Verifying Current Offset

Remove all connections from the PXIe-4136 and confirm the current measured by the PXIe-4136 at 0 V falls within the test limits.

Refer to the following table as you complete the following steps.

Complete this procedure only after successfully completing all previous verification procedures. Verify ranges in the order listed in the table.

Table 5. Current Offset Verification

Level Range| Limit Range and Limit| Test Point| As-Found Offset Test Limit| As-Left Offset Test Limit
---|---|---|---|---
600 mV| 1 μA| 0 mV| ±200 pA| ±85 pA
10 µA| ±1.4 nA| ±607 pA
100 µA| ±12 nA| ±5.8 nA
1 mA| ±120 nA| ±58.2 nA
10 mA| ±1.2 μA| ±582 nA
100 mA| ±12 μA| ±5.82 µA
1 A| ±120 μA| ±51 µA

1. Disconnect all equipment from the output of the PXIe-4136.
2. Measure the internal device temperature and perform self-calibration if
   • If the internal device temperature exceeds Tcal ±1 °C, wait up to five minutes for the temperature to stabilize to within Tcal ±1 °C.
   • If after five minutes the stable temperature still exceeds Tcal ±1 °C, call the self- calibration VI or
3. Take a current measurement using the PXIe-4136.
4. Record the value from the previous
5. Verify that the recorded value falls within the test
6. If more than one limit range is specified, repeat the previous steps using the values specified in each limit

Verifying Load Regulation

Note Although load regulation is listed as a typical specification for the PXIe-4136, verification is required. If the PXIe-4136 fails the load regulation

verification procedure, discontinue use of the device and contact an authorized NI service representative to request a Return Material Authorization (RMA).

Refer to the following table as you complete the following steps:

Table 6. Load Regulation Verification

Level Range| Limit Range and Limit| Test Point| As-found/As- left Limit
---|---|---|---
10 mA| 600 mV| 10 mA| 2 mV

1. Set the niDCPower Output Function property or NIDCPOWER_OUTPUT_FUNCTION attribute to DC Current for the PXIe-4136.

2. Set the niDCPower Sense property or NIDCPOWER_ATTR_SENSE attribute to Local.

3. Make the necessary connections for this procedure, as shown in the following figure:

Figure 5. Load Regulation Connection Diagram

Note Connection wires should be 18 or 20 AWG and as short as possible to ensure low resistance.

1. Set the first specified level range, limit range, and limit on the PXIe-4136.
2. Measure the internal device temperature and perform self-calibration if
3. If the internal device temperature exceeds Tcal ±1 °C, wait up to five minutes for the temperature to stabilize to within Tcal ±1 °C.
4. If after five minutes the stable temperature still exceeds Tcal ±1 °C, call the self- calibration VI or
5. Set the level on the PXIe-4136 to the first specified test
6. Take a voltage measurement using the PXIe-4136.

Verifying 1 μA and 10 μA Current Measurement and Output

Compare a set of measured currents reported by the PXIe-4136 to the currents measured by a DMM.

Refer to the following table as you complete the following steps.

Complete this procedure only after successfully completing all previous verification procedures. Verify ranges in the order listed in the table.

Level Range| Limit Range and Limit| Shunt| Test Point| As-Found Measurement Test Limit (% of Current + Offset)| As-Left Measurement Test Limit (% of Current + Offset)
---|---|---|---|---|---
6 V| 1 µA| 1 MΩ| -0.9 V| 0.03% + 200 pA| 0.0097% + 85 pA
0.9 V
20 V| 10 µA| -9 V| 0.03% + 1.4 nA| 0.0097% + 607 pA
9 V

1. Make the necessary connections for this procedure, as shown in the following figure: Figure 6. Current Connection Diagram, Part 1

2. Set the niDCPower Output Function property or NIDCPOWER_OUTPUT_FUNCTION attribute to DC Voltage for the PXIe-4136.

3.  Set the first specified level range, limit range, and limit on the PXIe-4136.

4.  Measure the internal device temperature and perform self-calibration if necessary.

   • a) If the internal device temperature exceeds Tcal ±1 °C, wait up to five minutes for the temperature to stabilize to within Tcal ±1 °C.
   • b) If after five minutes the stable temperature still exceeds Tcal ±1 °C, call the self-calibration VI or function.

5. Set the level on the PXIe-4136 to the first specified test point.

   • Complete the following four steps within 5 minutes or less of completing step 4 in order to ensure the internal device temperature remains stable.

6. Calculate the current through the shunt by completing the following steps.

   • a) Take a voltage measurement across the shunt using the DMM.
   • b) Divide the voltage measurement by the calibrated value of the shunt.
   • c) Record the calculated value as DMM Measured Current.

7. Calculate the lower and upper current measurement test limits using the following formula:
   Current Measurement Test Limits = DMM Measured Current ± (|DMM Measured Current| * % of Current + Offset)

8. Disconnect the DMM. Leave the PXIe-4136 output on.

9. Make the necessary connections as shown in the following figure:Figure 7. Current Connection Diagram, Part 2

10. Take a current measurement using the PXIe-4136.

11. Record the value from the previous step.

12. Verify that the recorded PXIe-4136 value falls within the test limits.

13. If more than one test point per level range is specified, repeat the previous steps for each test point, from setting the level to the test point on the PXIe-4136 up to this step.

14. If more than one level range is specified, repeat the previous steps using the values specified in each level range.

Verifying 100 μA to 100 mA Current Measurement and Output
Compare a set of currents measured by a DMM to the current test points requested by the PXIe-4136.
Refer to the following table as you complete the following steps.
Complete this procedure only after successfully completing all previous verification procedures. Verify ranges in the order listed in the table.

Table 8. 100 µA to 100 mA Current Output and Measurement Verification

Level Range| Limit Range and Limit| Test Point| As-Found Measurement Test Limit (% of Current + Offset)| As-Left Measurement Test Limit (% of Current + Offset)
---|---|---|---|---
100 µA| 6 V| -100 µA| 0.03% + 12 nA| 0.0095% + 5.82 nA
100 µA
1 mA| 6 V| -1 mA| 0.03% + 120 nA| 0.0095% + 58.2 nA
1 mA
10 mA| 6 V| -10 mA| 0.03% + 1.2 μA| 0.0097% + 582 nA
10 mA
100 mA| 6 V| -100 mA| 0.03% + 12 μA| 0.0139% + 5.82 µA
100 mA

1. Make the necessary connections for this procedure, as shown in the following figure:

2. Set the niDCPower Output Function property or NIDCPOWER_OUTPUT_FUNCTION attribute to DC Current for the PXIe-4136.

3. Set the first specified level range, limit range, and limit on the PXIe-4136.

4. Measure the internal device temperature and perform self-calibration if necessary.

   • a) If the internal device temperature exceeds Tcal ±1 °C, wait up to five minutes for the temperature to stabilize to within Tcal ±1 °C.
   • b) If after five minutes the stable temperature still exceeds Tcal ±1 °C, call the self-calibration VI or function.

5. Set the level on the PXIe-4136 to the first specified test point.

6. Compare a DMM current measurement to the current measurement test limits.

   • a) Take a current measurement using the DMM.

   • b) Calculate the lower and upper current measurement test limits using the following formula:
     Current Measurement Test Limits = Test Point ± (|Test Point| * % of Current + Offset)

   • c) Verify the DMM measurement falls within the test limits.

7. If more than one test point per level range is specified, repeat the previous steps for each test point, from setting the level to the test point on the PXIe-4136 up to this step.

8. If more than one level range is specified, repeat the previous steps using the values specified in each level range.

Verifying 1 A Current Measurement and Output
Compare a set of currents measured by an external DMM to the current test points requested by the PXIe-4136.
Refer to the following table as you complete the following steps.
Complete this procedure only after successfully completing all previous verification procedures. Verify ranges in the order listed in the table.

Level Range| Limit Range and Limit| Shunt| Test Point| As-Found Measurement Test Limit (% of Current + Offset)| As-Left Measurement Test Limit (% of Current + Offset)
---|---|---|---|---|---
1 A| 6 V| 1 Ω| -1 A| 0.04% + 120 μA| 0.0058% + 51 μA4
1 A

1. Make the necessary connections for this procedure, as shown in the following figure:

2. Set the niDCPower Output Function property or NIDCPOWER_OUTPUT_FUNCTION attribute to DC Current for the PXIe-4136.

3. Set the first specified level range, limit range, and limit on the PXIe-4136.

4. Measure the internal device temperature and perform self-calibration if necessary.

   • a) If the internal device temperature exceeds Tcal ±1 °C, wait up to five minutes for the temperature to stabilize to within Tcal ±1 °C.
   • b) If after five minutes the stable temperature still exceeds Tcal ±1 °C, call the self-calibration VI or function.

5. Set the level on the PXIe-4136 to the first specified test point.

6. Calculate the current through the shunt by completing the following steps.

   • a) Take a voltage measurement across the shunt using the DMM.
   • b) Divide the voltage measurement by the calibrated value of the shunt.
   • c) Record the calculated value as DMM Measured Current.

7. Calculate the lower and upper current measurement test limits using the following formula:
   Current Measurement Test Limits = Test Point ± (|Test Point| * % of Current + Offset)

8. Verify that the calculated DMM Measured Current value falls within the test limits.

9. If more than one test point per level range is specified, repeat the previous steps for each test point, from setting the level to the test point on the PXIe-4136 up to this step.

Adjustment

This section describes the steps needed to adjust the PXIe-4136 to meet published specifications.

Adjusted Specifications
Adjustment corrects the following specifications for the device:

• Voltage programming accuracy
• Current programming accuracy
• Voltage measurement accuracy
• Current measurement accuracy

Following the adjustment procedure automatically updates the calibration date and temperature on the device.

Note You do not need to separately adjust both measurement and output. The architecture of the PXIe-4136 ensures that if measurement is accurate, then output is as well, and vice versa.

Initiating the Adjustment Session

1. After completing verification, wait a minimum of five minutes for the internal device temperature to stabilize.

2. Initiate an external calibration session (a special type of NI-DCPower session) by calling the niDCPower Initialize External Calibration VI or niDCPower_InitExtCal function.

3. Call the self-calibration function.
   Follow the actions below during adjustment:

   • Keep the calibration session open until you complete all adjustment procedures.
   • Complete all adjustment procedures within 15 minutes or less after initiating the external calibration session.
   • Complete all adjustment procedures in the specified order.
   • Do not self-calibrate the device except as specified in a procedure.

Voltage and Current Output

Connecting and Configuring Equipment for Voltage Adjustment

1. Make the necessary connections for this procedure, as shown in the following figure:
2. Set the niDCPower Output Function property or NIDCPOWER_OUTPUT_FUNCTION attribute to DC Voltage for the PXIe-4136.
3. Set the niDCPower Sense property or NIDCPOWER_ATTR_SENSE attribute to Remote.

Adjusting Voltage Output and Measurement
Compare a set of measured currents reported by the PXIe-4136 to the currents measured by a DMM.
Refer to the following table as you complete the following steps:

-5 V

1. Set the first specified level range, limit range, and limit on the PXIe-4136.
2. Set the level on the PXIe-4136 to the first specified test
3. Take a voltage measurement using the
4. Store the value from the previous step to use as an input for the niDCPower Cal Adjust VI or function called in the following
5. If more than one test point per level range is specified, repeat the previous steps for each test point, from setting the level to the test point on the PXIe-4136 up to this
6. Update the output calibration constants by configuring and calling the niDCPower Cal Adjust Voltage Level VI or niDCPower_CalAdjustVoltageLevel
7. Input the DMM measurements as the measured outputs.
8. Input the test points as the requested outputs.
9. Input the specified level range as the range.

Adjusting 1 μA to 100 mA Current Output and Measurement

Complete this procedure only after successfully completing all previous adjustment procedures. Adjust ranges in the specified order.

Refer to the following table as you complete the following steps:

Table 11. 1 µA to 100 mA Current Output and Measurement Adjustment5

-100 µA
1 mA| 6 V| 100 µA6
-100 µA6

1. Make the necessary connections for this procedure, as shown in the following figure: Figure 11. Current Output and Measurement Adjustment Connection Diagram
2. Set the niDCPower Output Function property or NIDCPOWER_OUTPUT_FUNCTION attribute to DC Current for the PXIe-4136.
3. Set the first specified level range, limit range, and limit on the PXIe-4136.
4. Set the level on the PXIe-4136 to the first specified test point.
5. Take a current measurement using the DMM.
6. Store the value from the previous step to use as an input for the niDCPower Cal Adjust VI or function called in the following steps.
7. If more than one test point per level range is specified, repeat the previous steps for each test point, from setting the level to the test point on the PXIe-4136 up to this step.
8. Update the output calibration constants by configuring and calling the niDCPower Cal Adjust Current Limit VI or niDCPower_CalAdjustCurrentLimit function.
   • a) Input the calculated shunt current measurements as the measured outputs.
   • b) Input the test points as the requested outputs.
   • c) Input the specified level range as the range.
9. If more than one level range is specified, repeat the previous steps using the values specified in each level range.

Adjusting 1 A Current Output and Measurement
Compare a set of measured currents reported by the PXIe-4136 to the currents measured by an external DMM.
Refer to the following table as you complete the following steps.
Complete this procedure only after successfully completing all previous adjustment procedures. Adjust ranges in the specified order.
Table 12. 1 A Current Output and Measurement Adjustment

-1 A

1. Make the necessary connections for this procedure, as shown in the following figure: Figure 12. Current Output and Measurement Adjustment Connection Diagram
2. Set the niDCPower Output Function property or NIDCPOWER_OUTPUT_FUNCTION attribute to DC Current for the PXIe-4136.
3. Set the first specified level range, limit range, and limit on the PXIe-4136.
4. Set the level on the PXIe-4136 to the first specified test point.
5. Calculate the current through the shunt by completing the following steps.
   • Take a voltage measurement across the shunt using the DMM.
   • Divide the voltage measurement by the calibrated value of the shunt.
6. Store the value from the previous step to use as an input for the niDCPower Cal Adjust VI or function called in the following steps.
7. If more than one test point per level range is specified, repeat the previous steps for each test point, from setting the level to the test point on the PXIe-4136 up to this step.
8. Update the output calibration constants by configuring and calling the niDCPower Cal Adjust Current Limit VI or niDCPower_CalAdjustCurrentLimit function.
   • a) Input the calculated shunt current measurements as the measured outputs.
   • b) Input the test points as the requested outputs.
   • c) Input the specified level range as the range.

Residual Offset Voltage

Connecting and Configuring Equipment to Adjust Residual Offset Voltage

1. Make the necessary connections for this procedure, as shown in the following figure:
2. Set the niDCPower Output Function property or NIDCPOWER_OUTPUT_FUNCTION attribute to DC Voltage for the PXIe-4136.

Adjusting Residual Voltage Offset
Eliminate residual offset voltage at 0 V by configuring and calling the niDCPower Cal Adjust
Residual Voltage Offset VI or niDCPower_CalAdjustResidualVoltageOffset function.

Closing the Adjustment Session
Close the session and commit the new constants to hardware by calling the niDCPower Close
External Calibration VI or niDCPower_CloseExtCal function and specifying Commit as the calibration close action.

Alternative to Performing Adjustment Procedures
If your device passes all verification procedures successfully and you want to skip updating the calibration constants, you can update solely the calibration date by completing the following steps.

Note NI recommends following all adjustment procedures in order to update the calibration constants and renew the device calibration interval.

1. Call either the niDCPower Initialize External Calibration VI or the niDCPower_InitExtCal function.
2. Call either the niDCPower Close External Calibration VI or the niDCPower_CloseExtCal function, specifying Commit in calibration close action.

Reverification

Repeat the Verification section to determine the as-left status of the PXIe-4136.

Note If any test fails reverification after performing an adjustment, verify that you have met the Test Conditions before returning your PXIe-4136 to NI. Refer to the Worldwide Support and Services section for information about support resources or service requests.

Related Information

Test Conditions on page 3 Verification on page 6

Worldwide Support and Services

The NI website is your complete resource for technical support. At ni.com/support, you have access to everything from troubleshooting and application development self-help resources to email and phone assistance from NI Application Engineers.

Visit ni.com/servicesfor NI Factory Installation Services, repairs, extended warranty, and other services.

Visit ni.com/registerto register your NI product. Product registration facilitates technical support and ensures that you receive important information updates from NI.

A Declaration of Conformity (DoC) is our claim of compliance with the Council of the European Communities using the manufacturer’s declaration of conformity. This system affords the user protection for electromagnetic compatibility (EMC) and product safety. You can obtain the DoC for your product by visiting ni.com/certification. If your product supports calibration, you can obtain the calibration certificate for your product at ni.com/calibration.

NI corporate headquarters is located at 11500 North Mopac Expressway, Austin, Texas, 78759-3504. NI also has offices located around the world. For telephone support in the United States, create your service request at ni.com/supportor dial 1 866 ASK MYNI (275 6964). For telephone support outside the United States, visit the Worldwide Offices section of ni.com/ niglobalto access the branch office websites, which provide up-to-date contact information, support phone numbers, email addresses, and current events.

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CONTAINED HEREIN AND SHALL NOT BE LIABLE FOR ANY ERRORS. U.S. Government Customers: The data contained in this manual was developed at private expense and is subject to the applicable limited rights and restricted data rights as set forth in FAR 52.227-14, DFAR 252.227-7014, and DFAR 252.227-7015.

© 2015—2016 National Instruments. All rights reserved. 374879B-01 Aug16

References

• Test and Measurement Systems, a part of Emerson - NI
• Test and Measurement Systems, a part of Emerson - NI
• Product Certifications - NI
• Software and Driver Downloads - NI
• Product Documentation - NI
• Log In - National Instruments
• NI Services - NI
• Support - NI
• NI Trademarks and Logo Guidelines - NI
• Product Certifications - NI
• Software and Driver Downloads - NI
• Product Documentation - NI
• Contact Us - NI
• Log In - National Instruments
• NI Services - NI
• Support - NI
• PXIe-4136 National Instruments PXI Source Measure Unit | Apex Waves

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