National Instruments NI 6601 Manual

National Instruments NI 6601 Manual

Calibration procedure
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CALIBRATION PROCEDURE
NI 6601/6602
Contents
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This document contains information and instructions for calibrating the
National Instruments 6601/6602 data acquisition devices.
Introduction ............................................................................................. 2
What Is Calibration? ........................................................................ 2
Why Should You Verify? ................................................................ 2
How Often Should You Verify? ...................................................... 2
Software and Documentation.................................................................. 2
Software.................................................................................... 3
Documentation.......................................................................... 3
Test Equipment ....................................................................................... 3
Test Conditions ....................................................................................... 4
Calibration Process ................................................................................. 4
Setting Up the Stable Clock............................................................. 5
Setting Up a PXI-6608 Clock Source....................................... 5
Setting Up an Alternative Clock Source................................... 8
NI 6601/6602 Device............................................................. 9
Device Specifications.................................................................... 17
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Summary of Contents for National Instruments NI 6601

  • Page 1: Table Of Contents

    Setting Up a PXI-6608 Clock Source........5 Setting Up an Alternative Clock Source........8 Connecting the Clock Source to the NI 6601/6602 Device..... 8 Connecting a PXI-6608 to the NI 6601/6602 Device....8 Connecting an Alternative Clock Source to the NI 6601/6602 Device.............
  • Page 2: Introduction

    Software and Documentation You will need the following software and documentation to verify the NI 6601/6602. You can find these resources on the NI Web site at ni.com • Traditional NI-DAQ (Legacy) 7.4.4 •...
  • Page 3: Software

    For further information about the products you are calibrating, refer to the NI 660x User Manual. Test Equipment Verifying the NI 6601/6602 devices requires the following equipment: • A highly stable 10 MHz, 5 MHz, or 1 MHz clock source that is accurate to within 1 ppm.
  • Page 4: Test Conditions

    GATE of counter 0. The 20 MHz timebase on the NI 6601/6602 device, which is derived from the crystal oscillator, is the SOURCE of counter 0. You will count the number of clock edges of the...
  • Page 5: Setting Up The Stable Clock

    To set up a PXI-6608 as the stable clock source, complete the following steps: Power on the 6608 device. Wait 15 minutes to allow the measurement circuitry in the device to warm up. © National Instruments Corporation NI 6601/6602 Calibration Procedure...
  • Page 6 Configure the source of counter 1 as RTSI line 0. Traditional NI-DAQ Function Call LabVIEW Block Diagram Call with GPCTR_Change_Parameter the following parameters: deviceNumber: The value set by MAX gpctrNum: ND_COUNTER_1 paramID: ND_SOURCE paramValue: ND_RTSI_0 NI 6601/6602 Calibration Procedure ni.com...
  • Page 7 Configure the source of counter 1 to be available on PFI line 35. Traditional NI-DAQ Function Call LabVIEW Block Diagram Call with the following Select_Signal parameters: deviceNumber: The value set by MAX signal: ND_PFI_35 source: ND_GPCTR1_SOURCE sourceSpec: ND_DONT_CARE © National Instruments Corporation NI 6601/6602 Calibration Procedure...
  • Page 8: Setting Up An Alternative Clock Source

    Connecting the Clock Source to the NI 6601/6602 Device This section describes how to connect the clock source to the NI 6601/6602 device, whether you are using a PXI-6608 or another clock source. Connecting a PXI-6608 to the NI 6601/6602 Device Connect the PXI-6608 clock source to the NI 6601/6602 device using an SH68-68-D1 cable, which connects to the I/O connector of each device.
  • Page 9: Connecting An Alternative Clock Source To The Ni 6601/6602 Device

    To connect an alternative clock source to the NI 6601/6602 device, complete the following steps: Connect the NI 6601/6602 device to a 68-pin breakout box using the SH68-68-D1 cable. Connect the clock source to pins 7 and 41 of the 68-pin breakout box using twisted-pair wires.
  • Page 10 Configure the gate of counter 0 to be the output of counter 1. Traditional NI-DAQ Function Call LabVIEW Block Diagram Call with GPCTR_Change_Parameter the following parameters: deviceNumber: The value set by MAX gpctrNum: ND_COUNTER_0 paramID: ND_GATE paramValue: ND_OTHER_GPCTR_OUTPUT NI 6601/6602 Calibration Procedure ni.com...
  • Page 11 “TASK ID” out connects to “TASK ID” in of step 11. Configure counter 1 to perform single-pulse generation. Traditional NI-DAQ Function Call LabVIEW Block Diagram Call with the GPCTR_Set_Application following parameters: deviceNumber: The value set by MAX gpctrNum: ND_COUNTER_1 application: ND_SINGLE_PULSE_GNR © National Instruments Corporation NI 6601/6602 Calibration Procedure...
  • Page 12 ND_PFI_35 Set the pulse delay for the single-pulse generation. Traditional NI-DAQ Function Call LabVIEW Block Diagram Call with GPCTR_Change_Parameter the following parameters: deviceNumber: The value set by MAX gpctrNum: ND_COUNTER_1 paramID: ND_COUNT_1 paramValue: 2 NI 6601/6602 Calibration Procedure ni.com...
  • Page 13 500000 Program counter 1 to perform single-pulse generation. Traditional NI-DAQ Function Call LabVIEW Block Diagram Call with the following GPCTR_Control parameters: deviceNumber: The value set by MAX gpctrNum: ND_COUNTER_1 action: ND_PROGRAM © National Instruments Corporation NI 6601/6602 Calibration Procedure...
  • Page 14 “TASK ID” out connects to “TASK ID” in of step 13. Example Code for GPCTR Watch i16 iStatus = 0; u32 ulArmed = ND_YES; iStatus = GPCTR_Watch (deviceNumber, ND_COUNTER_1, ND_Armed, &ulArmed);} while ((ulArmed==ND_YES) && (iStatus==0)); NI 6601/6602 Calibration Procedure ni.com...
  • Page 15 “TASK ID” in connects to “TASK ID” out of step 4. Example Code for GPCTR Watch u32 ulCount = 0; iStatus = GPCTR_WATCH (deviceNumber, ND_COUNTER_0, ND_COUNT, &ulCount); ulCount = ulCount * 20; © National Instruments Corporation NI 6601/6602 Calibration Procedure...
  • Page 16 13. Reset counter 1 to its original state. Traditional NI-DAQ Function Call LabVIEW Block Diagram Call with the following GPCTR_Control parameters: deviceNumber: The value set by MAX gpctrNum: ND_COUNTER_1 action: ND_RESET “TASK ID” in connects to “TASK ID” out of step 10. NI 6601/6602 Calibration Procedure ni.com...
  • Page 17: Comparing The Measured Frequency To The Ni 6601/6602 Device Specifications

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