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© 2002–2003 National Instruments Corp. All rights reserved.

370396B-01

Sep03

*370396B-01*

Table 3.  

Excitation Limits

Excitation (V)

Lower Limit (V)

Upper Limit (V)

Index

0

–0.020000

0.020000

0

0.625

0.603125

0.646875

1

1.25

1.226250

1.273750

2

1.875

1.849375

1.900625

3

2.5

2.472500

2.527500

4

3.125

3.095625

3.154375

5

3.75

3.718750

3.781250

6

4.375

4.341875

4.408125

7

5

4.965000

5.035000

8

5.625

5.588125

5.661875

9

6.25

6.211250

6.288750

10

6.875

6.834375

6.915625

11

7.5

7.457500

7.542500

12

8.125

8.080625

8.169375

13

8.75

8.703750

8.796250

14

9.375

9.326875

9.423125

15

10

9.950000

10.050000

16

Summary of Contents for SCXI-1520

Page 1: ...for calibrating the SCXI 1520 Calibrator Fluke 5700A DMM NI 4060 or Agilent 34401A 16 bit DAQ device If these instruments are not available use the accuracy requirements listed above to select a subst...

Page 2: ...National Instruments DAQ NI DAQ Help The user manual provides instructions on installing and configuring DAQ devices The user manual also includes detailed information on creating applications that u...

Page 3: ...ations after adjustments Setting Up the SCXI 1520 for Testing Complete the following steps to set up the SCXI 1520 for testing 1 Install the SCXI 1520 in slot 1 of the SCXI chassis 2 Using an SCXI 134...

Page 4: ...Test Conditions section 2 Refer to the specifications in Table 2 3 Call Calibrate_E_Series to minimize the uncertainty associated with the DAQ device measurements Set the following parameters deviceN...

Page 5: ...ect the calibrator to the S0 and S0 inputs 8 Call SCXI_SCAN_Setup to set up the SCXI chassis to perform a multiplexed scanning data acquisition Set the following parameters SCXIchassisID The value ass...

Page 6: ...et_Excitation returns a 32 bit floating point number actualExcitationValuePtr 13 Call SCXI_Configure_Connection to configure the channel for a full bridge connection Set the following parameters SCXIc...

Page 7: ...the test If the result is outside these limits adjust the module using the steps in the Adjusting for Gain Offset and Excitation Errors section 19 Repeat steps 14 through 18 for the remaining gains 20...

Page 8: ...er from step 3 excitationType 2 excitationValue The excitation value that you want to measure Refer to Table 3 for a list of valid values SCXI_Set_Excitation returns a 32 bit floating point number cal...

Page 9: ...ifications in Table 2 3 Call Calibrate_E_Series to minimize the uncertainty associated with the DAQ device measurements Set the following parameters deviceNumber The value assigned by MAX calOP ND_SEL...

Page 10: ...channel 0 S0 is pin B32 If you are using an SCXI 1314 terminal block connect the calibrator to the S0 and S0 inputs on the SCXI 1314 8 Call SCXI_SCAN_Setup to set up the SCXI chassis to perform a mult...

Page 11: ...voltage to zero Set the following parameters SCXIchassisID The value assigned by MAX moduleSlot 1 moduleChan The channel number from step 7 excitationType 2 excitationValue 0 SCXI_Set_Excitation retur...

Page 12: ...by SCAN_Op The result is voltArray a set of scaled voltages measured with respect to the output of the SCXI module 18 Average the results returned by DAQ_VScale 19 Record the averaged voltage from ste...

Page 13: ...he gain setting of the module 2 Call SCXI_Adv_Module_Write to write the new gain calibration constants to the module Set the following parameters SCXIchassisID The value assigned by MAX moduleSlot 1 m...

Page 14: ...Module_Read to get the value of the 2 5 V reference voltage on the SCXI 1520 Use the following parameters SCXIchassisID The value assigned by MAX slot 1 moduleClass 2 address 3 numBytes 4 data The arr...

Page 15: ...ge you are adjusting 4 Repeat steps 2 and 3 for the remaining excitation voltages and channels Reading New Calibration Constants to Memory Note You can call SCXI_Get_Chassis_Info and SCXI_Get_Module_I...

Page 16: ...and Verifying Voltage Excitation sections Reverifying after adjustments ensures that the SCXI 1520 is operating within its specifications Front Signal Connector Pin Assignments The pin assignments for...

Page 17: ...RSVD SCA1 SCA1 24 SCB2 S2 S2 23 SCB2 RS2 RS2 22 SCB3 P2 P2 21 SCB3 SCA2 SCA2 20 RSVD S3 S3 19 RSVD RS3 RS3 18 RSVD P3 P3 17 RSVD SCA3 SCA3 16 SCB4 S4 S4 15 SCB4 RS4 RS4 14 SCB5 P4 P4 13 SCB5 SCA4 SCA4...

Page 18: ...4 900000 1 4 908900 4 891100 0 4 260870 1 15 4 253130 4 268609 1 0 000000 1 15 0 003478 0 003478 1 4 260870 1 15 4 268609 4 253130 1 3 769230 1 3 3 762385 3 776077 2 0 000000 1 3 0 003077 0 003077 2 3...

Page 19: ...2 0 000952 0 000952 11 1 166670 4 2 1 168786 1 164548 11 0 875000 5 6 0 873411 0 876589 12 0 000000 5 6 0 000714 0 000714 12 0 875000 5 6 0 876589 0 873411 12 0 753850 6 5 0 752477 0 755215 13 0 0000...

Page 20: ...00222 0 000222 20 0 272220 18 0 272717 0 271728 20 0 245000 20 0 244555 0 245445 21 0 000000 20 0 000200 0 000200 21 0 245000 20 0 245445 0 244555 21 0 222730 22 0 222323 0 223132 22 0 000000 22 0 000...

Page 21: ...65 0 000062 0 000062 29 0 075380 65 0 075522 0 075248 29 0 065330 75 0 065215 0 065452 30 0 000000 75 0 000053 0 000053 30 0 065330 75 0 065452 0 065215 30 0 056320 87 0 056220 0 056424 31 0 000000 87...

Page 22: ...0 000055 38 0 022270 220 0 022350 0 022196 38 0 020420 240 0 020342 0 020491 39 0 000000 240 0 000054 0 000054 39 0 020420 240 0 020491 0 020342 39 0 018150 270 0 018076 0 018220 40 0 000000 270 0 00...

Page 23: ...0052 45 0 007540 650 0 007598 0 007479 45 0 006530 750 0 006475 0 006592 46 0 000000 750 0 000052 0 000052 46 0 006530 750 0 006592 0 006475 46 0 005630 870 0 005575 0 005690 47 0 000000 870 0 000052...

Page 24: ...ts 2002 2003 National Instruments Corp All rights reserved 370396B 01 Sep03 370396B 01 Table 3 Excitation Limits Excitation V Lower Limit V Upper Limit V Index 0 0 020000 0 020000 0 0 625 0 603125 0 6...

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