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NI PXIe-4339 Calibration Procedure

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© National Instruments

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9

Figure 3 shows the CH0/CH1 channel pair with CH0 configured for ratio mode verification and 
CH1 configured to measure CH0 excitation voltage.

Figure 3.  

Ratio Mode Accuracy Verification

Complete the following steps to verify the ratio mode accuracy of the NI PXIe-4339.
1.

Set the calibrator to standby mode (STBY).

2.

Connect the calibrator to the TB-4339/B/C as shown in Figure 2.

If the calibrator has a guard connection, leave it disconnected.

If the calibrator output is floating, you must connect the negative output to AIGND.

3.

Set the calibrator voltage output to 0 V.

4.

Set the calibrator to operate mode (OPR) to enable output.

x1, x20,

x50, x100

EX1+

EX1–

EX0+

I/O

Connector

R

S

0+

AI0+

R

S

0–

EX0–

AI0–

Progr

a

mm

ab

le

Excit

a

tion

G

a

in=1

or 0.25

An

a

log

Anti-Ali

as

Filter

G

a

in = 0.25

ADC

Reference

Inp

u

t

2.5 V

+

EX1+

R

S

1+

AI1+

R

S

1–

EX1–

AI1–

Progr

a

mm

ab

le

Excit

a

tion

G

a

in=1

or 0.25

x1, x20,

x50, x100

An

a

log

Anti-Ali

as

Filter

G

a

in = 0.25

ADC

Reference

Inp

u

t

2.5 V

+

EX0+

EX0–

CH1

CH0

V

ref

+

Summary of Contents for PXIe-4339

Page 1: ...nt Procedure 21 EEPROM Update 28 Reverification 29 Specifications 29 Where to Go for Support 29 Software Calibrating the NI PXIe 4339 requires the installation of NI DAQmx on the calibration system Dr...

Page 2: ...reference information NI PXIe 4339 Specifications NI PXIe 4339 specifications and calibration interval NI DAQmx Readme Operating system and application software support in NI DAQmx NI DAQmx Help Infor...

Page 3: ...select a substitute using the requirements listed in Table 1 Table 1 Recommended Equipment Equipment Recommended Model Requirements Calibrator Fluke 5700 If this instrument is unavailable use a calibr...

Page 4: ...alog Signal Names Signal Name Signal Description AI Positive input voltage terminal AI Negative input voltage terminal CH2 CH3 CH0 CH1 CH5 CH4 CH6 CH7 PFI0 DGND AOGND AIGND T T T T T T T T T T T T T T...

Page 5: ...ation Guide and Terminal Block Specifications 2 For voltage verification and adjustment connect the calibrator to the TB 4339 B C as shown in Figure 2 If the calibrator has a guard connection leave it...

Page 6: ...ow to install the software and hardware and how to configure the device in Measurement Automation Explorer MAX Note When a device is configured in MAX it is assigned a device identifier Each function...

Page 7: ...voltage measurement with the NI PXIe 4339 a Create a DAQmx task b Create and configure the AI channel according to the values shown in Table 3 c Start the task d Average the readings that you acquired...

Page 8: ...you will acquire a voltage measurement Vmeas for each paired channel at 0 V and 9 V outputs From these results you can determine the ratio verification adjustment factors including the gain adjust Gad...

Page 9: ...4339 B C as shown in Figure 2 If the calibrator has a guard connection leave it disconnected If the calibrator output is floating you must connect the negative output to AIGND 3 Set the calibrator vo...

Page 10: ...Ie 4339 a Create a DAQmx task b Create and configure the AI channels according to the values shown in Table 5 c Start the task d Average the readings that you acquired and record the values as chx_9V...

Page 11: ...ridge V V measurement using the values in Table 6 c Commit the task to turn on and set the excitation voltage using the following parameters Task DAQmx control task task channels in task_out from the...

Page 12: ...ratiometric reference input value for each ratiometric channel by dividing the calibrator output voltage setting by the paired channels ratio verification adjusted excitation voltage measurement Vm_ex...

Page 13: ...on V Test Point V V Lower Limit V V Upper Limit V V High Low 0 01 0 01 2 75 0 02475 Vm_ex_ch calibrator output Vm_ex_ch Test Point 1 0 001 26 9 V V Test Point 1 0 001 26 9 V V 0 Vm_ex_ch calibrator ou...

Page 14: ...etting V Calibrator Output V Measured Excitation V Test Point V V Lower Limit V V Upper Limit V V High Low 0 02 0 02 2 75 0 0495 Vm_ex_ch calibrator output Vm_ex_ch Test Point 1 0 001 32 4 V V Test Po...

Page 15: ...est Point 1 0 001 8 9 V V Test Point 1 0 001 8 9 V V 0 Vm_ex_ch calibrator output Vm_ex_ch 8 9 V V 8 9 V V 0 18 Vm_ex_ch calibrator output Vm_ex_ch Test Point 1 0 001 8 9 V V Test Point 1 0 001 8 9 V...

Page 16: ...V Test Point 1 0 001 26 6 V V 0 05 0 05 7 5 0 3375 Vm_ex_ch calibrator output Vm_ex_ch Test Point 1 0 001 17 7 V V Test Point 1 0 001 17 7 V V 0 Vm_ex_ch calibrator output Vm_ex_ch 17 7 V V 17 7 V V 0...

Page 17: ...Vm_ex_ch calibrator output Vm_ex_ch Test Point 1 0 001 468 8 V V Test Point 1 0 001 468 8 V V 1 1 5 4 5 Vm_ex_ch calibrator output Vm_ex_ch Test Point 1 0 001 312 2 V V Test Point 1 0 001 312 2 V V 0...

Page 18: ...calibrator output Vm_ex_ch Test Point 1 0 001 74 V V Test Point 1 0 001 74 V V 0 04 0 04 1 5 0 054 Vm_ex_ch calibrator output Vm_ex_ch Test Point 1 0 001 49 3 V V Test Point 1 0 001 49 3 V V 0 Vm_ex_...

Page 19: ...Vm_ex_ch calibrator output Vm_ex_ch Test Point 1 0 001 89 0 V V Test Point 1 0 001 89 0 V V 0 08 0 08 1 5 0 108 Vm_ex_ch calibrator output Vm_ex_ch Test Point 1 0 001 59 3 V V Test Point 1 0 001 59 3...

Page 20: ...x_ch calibrator output Vm_ex_ch Test Point 1 0 001 133 0 V V Test Point 1 0 001 133 0 V V 0 2 0 2 1 5 0 27 Vm_ex_ch calibrator output Vm_ex_ch Test Point 1 0 001 88 7 V V Test Point 1 0 001 88 7 V V 0...

Page 21: ...V V 3 6 Vm_ex_ch calibrator output Vm_ex_ch Test Point 1 0 001 1561 V V Test Point 1 0 001 1561 V V 4 4 1 5 5 4 Vm_ex_ch calibrator output Vm_ex_ch Test Point 1 0 001 1041 V V Test Point 1 0 001 1041...

Page 22: ...g you must connect the negative output to AIGND 3 Call the DAQmx Initialize External Calibration function with the following parameters Device In Dev1 Password NI 4 Call the 4339 instance of the DAQmx...

Page 23: ...nfigured in step 4 9 Repeat steps 4 through 8 for the remaining ranges from Table 16 10 Call the 4339 instance of the DAQmx Adjust SC Express Calibration function with the following parameters calhand...

Page 24: ...librator output value from step 11 14 Repeat steps 11 through 13 for the remaining calibrator output values from Table 17 15 Repeat steps 10 through 14 for the remaining excitation voltage values from...

Page 25: ...0 0 18 Table 19 Ratio Mode 0 05 V V Range Range V V Excitation Setting V Calibrator Output V Max Min 0 05 0 05 2 75 0 12375 0 0 12375 0 05 0 05 3 33 0 14985 0 0 14985 0 05 0 05 5 0 225 0 0 225 0 05 0...

Page 26: ...atio Mode 1 V V Range Range V V Excitation Setting V Calibrator Output V Max Min 1 1 2 75 2 475 0 2 475 1 1 3 33 2 997 0 2 997 1 1 5 4 5 0 4 5 1 1 7 5 6 75 0 6 75 1 1 10 9 0 9 Table 19 Ratio Mode 0 05...

Page 27: ...ng V Calibrator Output V Max Min 0 04 0 04 0 625 0 0225 0 0 0225 0 04 0 04 1 0 036 0 0 036 0 04 0 04 1 5 0 054 0 0 054 0 04 0 04 2 0 072 0 0 072 0 04 0 04 2 5 0 09 0 0 09 Table 22 Ratio Mode 0 08 V V...

Page 28: ...5 0 18 0 0 18 Table 23 Ratio Mode 0 2 V V Range Range V V Excitation Setting V Calibrator Output V Max Min 0 2 0 2 0 625 0 1125 0 0 1125 0 2 0 2 1 0 18 0 0 18 0 2 0 2 1 5 0 27 0 0 27 0 2 0 2 2 0 36 0...

Page 29: ...calhandle output from DAQmx Initialize External Calibration action commit 0 2 0 2 2 5 0 45 0 0 45 Table 24 Ratio Mode 4 V V Range Range V V Excitation Setting V Calibrator Output V Max Min 4 4 0 625...

Page 30: ...calibration temperature without making any adjustments by initializing an external calibration and closing the external calibration Reverification Repeat the Verification section to determine the As...

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