National Instruments 6703 Скачать руководство пользователя страница 17

Страница: 17 / 18

National Instruments Corporation

6703/6704 Calibration Procedure

Current Output Calibration

Figure 4.

Current Output Calibration (6704 Only)

AO_VWrite(deviceNumber,16,0.1)

Connect the multimeter to current channel 16.

AO_VWrite(deviceNumber,33,voltage)

Adjust voltage until the DMM reads 0.1 mA.

AO_VWrite(deviceNumber,35,voltage)

Adjust voltage until the DMM reads 20.0 mA.

AO_VWrite(deviceNumber,16,20.0)

Set_DAQ_Device_Info(deviceNumber,ND_CALIBRATION_ENABLE,ND_YES)

Содержание 6703

Страница 1: ...it This section also explains internal and external calibration Equipment and Other Test Requirements This section describes what you need to do before you can calibrate your device including an over...

Страница 2: ...of your application indicate how often the 6703 6704 products need to be calibrated to maintain accuracy National Instruments recommends that you perform a complete calibration at least once every ye...

Страница 3: ...the calibration and verification process to approximately 10 minutes However manual calibration and verification can take as long as 1 hour You can automate the adjustment and verification procedure i...

Страница 4: ...e detailed information on using the NI DAQ driver The function reference manual includes information on the functions in the driver The user manual provides instructions on installing and configuring...

Страница 5: ...edure The calibration procedure in the Calibration Process section later in this document provides step by step instructions on calling the appropriate calibration functions These calibration function...

Страница 6: ...as by picking up extra noise that would affect calibration Maintain the temperature between 18 28 C Keep relative humidity below 80 Use shielded copper wire for all cable connections to the device It...

Страница 7: ...his procedure can be easily expanded to verify all the voltage channels by performing the procedure once for each voltage channel To do this perform the procedure once for each value of the channel pa...

Страница 8: ...he procedure once for each value of the channel parameter from 16 to 31 You will also need to connect the appropriate channel to your multimeter each time you repeat the procedure See the PCI PXI 6703...

Страница 9: ...make offset and gain adjustments You perform offset adjustment first followed by gain adjustment You will then perform both offset and gain adjustment again to ensure proper accuracy This second set...

Страница 10: ...the voltage on voltage channel 0 Decreasing the voltage value will increase the magnitude of the voltage on voltage channel 0 You have now calibrated the voltage output Calibrating Current Output 6704...

Страница 11: ...on current channel 16 Decreasing the voltage value will increase the magnitude of the current on current channel 16 You have now calibrated the current output Saving Calibration Values Once you comple...

Страница 12: ...ng tables are the specifications you should use when calibrating and verifying the 6703 6704 The tables show the specifications for 1 year and 24 hour calibration intervals Using the Tables The follow...

Страница 13: ...r Limit V Lower Limit V Upper Limit V 0 0 0 0003125 0 0003125 0 0003125 0 0003125 10 0 9 9992675 10 0007325 9 9990975 10 0009025 Table 2 Current Output Specifications 6704 Only Test Point Value mA 24...

Страница 14: ...r additional information on the software structure Voltage Output Verification Figure 1 Voltage Output Verification Look at the 6703 6704 specification table to determine the appropriate ranges for th...

Страница 15: ...tput Verification 6704 Only Look at the 6703 6704 specification table to determine the appropriate ranges for the voltages and currents to be verified Get_Cal_Date deviceNumber Connect the multimeter...

Страница 16: ...IBRATION_ENABLE ND_YES AO_VWrite deviceNumber 0 0 0 AO_VWrite deviceNumber 0 10 0 6703 AO_VWrite deviceNumber 16 voltage Adjust voltage until the DMM reads 10 0 V 6704 AO_VWrite deviceNumber 32 voltag...

Страница 17: ...6704 Only AO_VWrite deviceNumber 16 0 1 Connect the multimeter to current channel 16 AO_VWrite deviceNumber 33 voltage Adjust voltage until the DMM reads 0 1 mA AO_VWrite deviceNumber 35 voltage Adju...

Страница 18: ...libration Procedure 18 www natinst com Saving Calibration Values Figure 5 Saving Calibration Values Set_DAQ_Device_Info deviceNumber ND_CALIBRATION_ENABLE ND_NO AO_Calibrate deviceNumber 2 1 Copy_Cal...