National Instruments NI PXIe-4139, Calibration Procedure

Page 1: ...ing and Configuring Equipment for Voltage Verification 6 Verifying Voltage Measurement and Output 6 Verifying Remote Sense Voltage Offset 8 Verifying Voltage Remote Sense 8 Verifying Current Offset 10 Verifying Load Regulation 11 Verifying 1 μA and 10 μA Current Measurement and Output 12 Verifying 100 μA to 100 mA Current Measurement and Output 14 Verifying 1 A and 3 A Current Measurement and Outp...

Page 2: ...port Location LabVIEW NI DCPower Calibration palette LabWindows CVI NI DCPower function panel niDCPower fp 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 4138 4139 Getting Started Guide NI DC Power Supplies and SMUs Help PXIe 4139 Specifications NI DCPowe...

Page 3: ... 3 A current accuracy 120 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 4139 meets the published specifications Test limits in this document are based on the January 2016 edition of the PXIe 4139 Specifications except for more recently revised remote sense tes...

Page 4: ...stment functions because you cannot set aperture time using the SFP Ensure that properties or attributes for the device that are not specified in calibration procedures are set to their default values When making measurements configure any specified digital multimeters DMMs with the best available ranges and measurement settings for each specified test point For verification procedures maintain an...

Page 5: ...nfigure it in Measurement Automation Explorer MAX 2 Verification Verify the existing operation of the PXIe 4139 This step confirms whether the device is operating within the published specifications prior to adjustment 3 Adjustment Adjust the calibration constants of the PXIe 4139 4 Reverification Repeat the Verification procedure to ensure that the device is operating within the published specifi...

Page 6: ... PXI chassis fans set to HIGH 3 Initialize an NI DCPower session 4 Call the self calibration function 5 Close the NI DCPower session 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 DMM Voltage Mode NI DCPower Device Sense LO Sense HI HI L...

Page 7: ...lize 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 4 Set the level on the PXIe 4139 to the first specified test point 5 Compare a DMM voltage measurement to the voltage measurement test limits a Take a voltage measurement using the DMM b Calculate the lower and upper voltage measurement test limits using the follow...

Page 8: ...39 to the first specified test point 4 Compare a DMM voltage measurement to the voltage measurement test limits a Take a voltage measurement using the DMM b Verify the DMM measurement falls within the test limits 5 If more than one level range is specified repeat the previous steps using the values specified in each level range Verifying Voltage Remote Sense Use the PXIe 4139 in constant current m...

Page 9: ...ds Tcal 1 C call the self calibration VI or function 6 Set the level on the PXIe 4139 to the first specified test point 7 Take a voltage measurement using the PXIe 4139 8 Record the voltage from the previous step as V1 9 Repeat the previous three steps for the other test point specified in the range This time record the value as V2 10 Calculate the remote sense error using the following formula an...

Page 10: ...ted 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 Lower Limit Upper Limit Lower Limit Upper Limit 600 mV 1 μA 0 mV 40 pA 40 pA 25 pA 25 pA 10 µA 300 pA 300 pA 200 pA 200 pA 100 µA 2 nA 2 nA 1 5 nA 1 5 nA 1 mA 20 nA 20 nA 15 nA 15 nA 10 mA 200 nA 200 nA 150 nA 150 nA 100 mA 2 μA 2 μA 1 5 μA 1 5 μA 1...

Page 11: ...ifying Load Regulation Note Although load regulation is listed as a typical specification for the PXIe 4139 verification is required If the PXIe 4139 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...

Page 12: ...ze 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 6 Set the level on the PXIe 4139 to the first specified test point 7 Take a voltage measurement using the PXIe 4139 Verifying 1 μA and 10 μA Current Measurement and Output Compare a set of measured currents reported by the PXIe 4139 to the currents measured by a DMM ...

Page 13: ...and limit on the PXIe 4139 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 4139 to the first sp...

Page 14: ...ue 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 4139 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 se...

Page 15: ...onnection Diagram NI DCPower Device Sense LO Sense HI HI LO DMM Current Mode 2 Set the niDCPower Output Function property or NIDCPOWER_OUTPUT_FUNCTION attribute to DC Current for the PXIe 4139 3 Set the first specified level range limit range and limit on the PXIe 4139 4 Measure the internal device temperature and perform self calibration if necessary a If the internal device temperature exceeds T...

Page 16: ... in each level range Verifying 1 A and 3 A Current Measurement and Output Compare a set of currents measured by a DMM to the current test points requested by the PXIe 4139 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 9 1 A and 3 A ...

Page 17: ...h 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 Veri...

Page 18: ...ce 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 withi...

Page 19: ...t specified level range limit range and limit on the PXIe 4139 2 Set the level on the PXIe 4139 to the first specified test point 3 Take a voltage measurement using the DMM 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 steps 5 If more than one test point per level range is specified repeat the previous steps for each...

Page 20: ...ower Output Function property or NIDCPOWER_OUTPUT_FUNCTION attribute to DC Current for the PXIe 4139 3 Set the first specified level range limit range and limit on the PXIe 4139 4 Set the level on the PXIe 4139 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 i...

Page 21: ...is 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 12 1 A and 3 A Current Output and Measurement Adjustment Level Range Limit Range and Limit Shunt Test Point 1 A 6 V 1 Ω 1 A 1 A 3 A 6 V 333 mΩ 3 A 3 A 1 Make the necessary connections for this procedure as sho...

Page 22: ...I 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 Residual Offset Voltage Connecting and Configuring Equipment to Adj...

Page 23: ...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 After completing adjustment wait a minimum of five minutes for the internal device temperature to stabilize Repeat the Verification section to determine the as left status of the dev...

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