NI FD-11634 Handbuch

CALIBRATION PROCEDURE

FD-11634

8-Channel Sound and Vibration Input Device for FieldDAQ

This document contains information for calibrating the FD-11634. For more information about

calibration, visit ni.com/calibration.

Contents

Software Requirements............................................................................................................. 1

Documentation.......................................................................................................................... 2

Test Equipment..........................................................................................................................2

Test Conditions..........................................................................................................................3

Calibration Procedure............................................................................................................... 3

Initial Setup....................................................................................................................... 4

Verification........................................................................................................................4

Adjustment........................................................................................................................ 7

EEPROM Update..............................................................................................................8

Reverification....................................................................................................................9

Accuracy Under Calibration Conditions...................................................................................9

Signal Connector Pinout......................................................................................................... 10

Revision History..................................................................................................................... 10

NI Services..............................................................................................................................10

Software Requirements

Calibrating the FD-11634 requires the installation of NI-DAQmx on the calibration system. NI

recommends using the latest NI-DAQmx driver. Earliest driver support version for calibrating

the FD-11634 is listed in the following table.

Table 1. FD-11634 Driver Support

Driver Earliest Version Support for Device Calibration

NI-DAQmx 18.6

You can download NI-DAQmx from ni.com/downloads. NI-DAQmx supports many

programming languages, including LabVIEW, LabWindows™/CVI™, C/C++, C#, and Visual

Basic .NET. When you install NI-DAQmx, you only need to install support for the application

software that you intend to use.

Documentation

Consult the following documents for information about the FieldDAQ device and the

NI-DAQmx driver. All documents are available on ni.com/manuals; help files install with the

software.

FD-11634 Quick Start— Provides instructions for installing and configuring your

FieldDAQ device.

FD-11634 User Guide—Provides information about your FieldDAQ device.

FD-11634 Specifications—Provides detailed specifications for your FieldDAQ

device.

NI-DAQmx Readme—Provides operating system and application software support in

NI-DAQmx.

NI-DAQmx Help—Provides information about creating applications that use the

NI-DAQmx driver.

NI-DAQmx C Reference Help—Provides reference information for NI-DAQmx

C functions and NI-DAQmx C properties.

Test Equipment

The following table lists the equipment required for calibrating your FD-11634. If you do not

have the recommended instruments, use the minimum requirements to select substitute

equipment.

2| ni.com | FD-11634 Calibration Procedure

Table 2. Recommended Test Equipment

Equipment Recommended Model Minimum Requirements

Calibrator Fluke 5522A Voltage source with gain uncertainty

of <25 ppm and offset uncertainty of

<94 μV in the 10 V range and <12 μV

in the 1 V range.

SHM125M-Pigtail I/O

Cable (0.3 m, 1 m, 3 m

lengths) (x4)

NI part number

785950-0R3/01/03

—

Banana Plug (optional)

(x2)

— Use banana plugs with an opening

large enough to accommodate four

22 AWG signal wires

Test Conditions

The following setup and environmental conditions are required to ensure the FD-11634 meets

published specifications:

• Keep connections to the device as short as possible. Long cables and wires act as

antennas, picking up extra noise that can affect measurements.

• Verify that all connections to the device are secure.

• Use shielded copper wire for all cable connections to the device. Use twisted-pairs wire

to eliminate noise and thermal offsets.

• Maintain an ambient temperature of 23 ±5 °C. The device temperature will be greater

than the ambient temperature.

• Keep relative humidity below 80%.

• Allow a warm-up time of at least 10 minutes to ensure that the FieldDAQ device

measurement circuitry is at a stable operating temperature.

Calibration Procedure

The calibration process includes the following steps:

1. Initial Setup on page 4

2. Verification on page 4

3. Adjustment on page 7

4. EEPROM Update on page 8

5. Reverification on page 9

FD-11634 Calibration Procedure | © National Instruments Corporation | 3

Initial Setup

Complete the following steps to set up the FieldDAQ device.

1. Install the software and NI-DAQmx driver as outlined in the FD-11634 Quick Start.

Note You must install NI-DAQmx 18.6 or later for device calibration support.

2. Set up the FieldDAQ device as outlined in the FD-11634 Quick Start.

3. Configure the FieldDAQ device in Measurement & Automation Explorer (NI MAX) as

outlined in the FD-11634 Quick Start.

4. If the FieldDAQ device is not reserved automatically, select the device and click the

Reserve Network Device button. Refer to Reserving the Device in MAX for more

information.

5. Self-test your device in MAX by expanding Devices and Interfaces »Network Devices ,

right-clicking your FieldDAQ device, and selecting Self-Test. Self-test performs a brief

test to determine successful device installation. When the self-test finishes, a message

indicates successful verification or if an error occurred. If an error occurs, refer to ni.com/

support/daqmx.

Reserving the Device in MAX

When the FieldDAQ device is connected to a network, multiple users can access the device.

To perform any DAQ functionality on the device, including reset and self-test, you must

reserve the device in MAX. In MAX, an unreserved device or device reserved by another host

appears with an X and a reserved device appears as dark grey. Only one user at a time can

reserve the FieldDAQ device.

If the device was not reserved automatically after it was added (Add Device), you can reserve

the device in MAX by expanding Devices and Interfaces»Network Devices, selecting the

device, and clicking the Reserve Network Device button. The Override Reservation dialog

box opens when you attempt to explicitly reserve a device. Agreeing to override the

reservation forces the FieldDAQ device to be reserved by the current user.

Verification

Complete the following procedure to determine the As-Found status of the FieldDAQ device.

1. Set the calibrator to Standby mode (STBY).

2. Connect the calibrator to Bank 1 of the FieldDAQ device, as shown in the following

figure. Refer to Signal Connector Pinout for signal connection information.

4| ni.com | FD-11634 Calibration Procedure

Figure 1. Bank 1 Verification Connections

AI 0+

AI 0–

AI 1+

AI 1–

Calibrator

FD-11634

AI 2+

AI 2–

AI 3+

AI 3– Bank 1

– Tie AI 0+, AI 1+, AI 2+, and AI 3+ together.

– Tie AI 0-, AI 1-, AI 2-, and AI 3- together.

Figure 2. Terminating Four Cables to HI and LO

AI 0

AI 1

AI 2

AI 3

3. Set the calibrator to a reference value determined by the array of recommended

calibration voltages indicated in the following table.

Table 3. FD-11634 Test Limits

Range

Test Point As-Found Limits (V) As-Left Limits (V)

Location Value (V) Lower Limit Upper Limit Lower Limit Upper Limit

10 V Negative Full

Scale

-8.9125 -8.9216 -8.9034 -8.9143 -8.9107

Mid 0.0 -0.0020 0.0020 -0.00094 0.00094

Positive Full

Scale

8.9125 8.9034 8.9216 8.9107 8.9143

FD-11634 Calibration Procedure | © National Instruments Corporation | 5

Table 3. FD-11634 Test Limits (Continued)

Range

Test Point As-Found Limits (V) As-Left Limits (V)

Location Value (V) Lower Limit Upper Limit Lower Limit Upper Limit

1 V Negative Full

Scale

-0.89125 -0.89244 -0.89006 -0.89149 -0.89101

Mid 0.0 -0.0003 0.0003 -0.00012 0.00012

Positive Full

Scale

0.89125 0.89006 0.89244 0.89101 0.89149

The test limits in this table are derived using the values listed in Accuracy Under Calibration

Conditions.

4. Set the calibrator to Operate mode (OPR).

5. Acquire and average samples.

a. Create and configure an AI voltage channel on the FieldDAQ device according to

the following table.

Table 4. FD-11634 Accuracy Verification Configuration

Physical Channel Minimum Maximum Scaled Units Channel Configuration

FD11634-Bank1/ai0:3 -10 10 Volts Pseudodifferential

FD11634-Bank1/ai0:3 -1 1 Volts Pseudodifferential

b. Configure the AI voltage channel timing according to the following table.

Table 5. FD-11634 Voltage Channel Timing Configuration

Sample Mode Samples per Channel Rate (kS/s)

Finite Samples 10240 102.4

c. Start the task.

d. Read the samples.

e. Average the readings.

f. Clear the task.

6. Compare the average to the limits in Table 3.

7. Repeat steps 3 through 6 for each test point and voltage range.

8. Set the calibrator to Standby mode (STBY).

9. Disconnect the calibrator from the FieldDAQ device.

10. Connect the calibrator to Bank 2 of the FD-11634, as shown in the following figure.

Refer to Signal Connector Pinout for signal connection information.

6| ni.com | FD-11634 Calibration Procedure

Figure 3. Bank 2 Verification Connections

AI 0+

AI 0–

AI 1+

AI 1–

Calibrator

FD-11634

AI 2+

AI 2–

AI 3+

AI 3– Bank 2

– Tie AI 0+, AI 1+, AI 2+, and AI 3+ together.

– Tie AI 0-, AI 1-, AI 2-, and AI 3- together.

11. Complete Steps 3 through 9 for Bank 2 using FD11634-Bank2/ai0:3 as the physical

channel.

Adjustment

Complete the following procedure to adjust the voltage accuracy of the FieldDAQ device.

1. Set the calibrator to Standby mode (STBY).

2. Connect the calibrator to Bank 1 of the FieldDAQ device, as shown in the following

figure. Refer to Signal Connector Pinout for signal connection information.

Figure 4. Bank 1 Adjustment Connections

AI 0+

AI 0–

AI 1+

AI 1–

Calibrator

FD-11634

AI 2+

AI 2–

AI 3+

AI 3– Bank 1

– Tie AI 0+, AI 1+, AI 2+, and AI 3+ together.

– Tie AI 0-, AI 1-, AI 2-, and AI 3- together.

3. Initialize a calibration session on the FieldDAQ device. The default password is NI.

4. Adjust the FieldDAQ device voltage.

a. Input the external temperature in degrees Celsius using the Set Temperature

FieldDAQ function.

b. Call the Setup FD-11634 Calibration function and set the AI maximum and

minimum according to the following table.

FD-11634 Calibration Procedure | © National Instruments Corporation | 7

Table 6. Setup FD-11634 Calibration Function Configuration

Range Minimum Maximum Scaled Units

10 V -10 10 Volts

1 V -1 1 Volts

c. Call the Get FD-11634 Calibration Adjustment Points function.

d. Set the calibrator to a reference value determined by the array of adjustment points.

e. Set the calibrator to Operate mode (OPR).

f. Call and configure the Adjust FD-11634 Calibration function according to the

following table.

Table 7. Adjustment Configuration

Physical Channel Reference Value

FD11634-Bank1/ai0:3 A reference value from the array of adjustment points

g. Repeat steps d through e for each calibration voltage in the array.

5. Set the calibrator to Standby mode (STBY).

6. Disconnect the calibrator from the FieldDAQ device.

7. Connect the calibrator to Bank 2 of the FD-11634, as shown in the following figure.

Refer to Signal Connector Pinout for signal connection information.

Figure 5. Bank 2 Adjustment Connections

AI 0+

AI 0–

AI 1+

AI 1–

Calibrator

FD-11634

AI 2+

AI 2–

AI 3+

AI 3– Bank 2

– Tie AI 0+, AI 1+, AI 2+, and AI 3+ together.

– Tie AI 0-, AI 1-, AI 2-, and AI 3- together.

8. Without closing the Bank 1 session, complete Steps 3 through 5 for Bank 2 using

FD11634-Bank2/ai0:3 as the physical channel.

9. Close and commit both calibration sessions.

EEPROM Update

When an adjustment procedure is completed, the FieldDAQ device internal calibration

memory (EEPROM) is immediately updated.

8| ni.com | FD-11634 Calibration Procedure

If you do not want to perform an adjustment, you can update the calibration date and onboard

calibration temperature without making any adjustments:

1. Call the DAQmx Initialize External Calibration function to start a calibration session on

the FieldDAQ device. The default password is NI.

2. Call the DAQmx Set Temperature FieldDAQ Calibration function to input the external

temperature in degrees Celsius.

3. Call the DAQmx Close External Calibration function to end the session. Set the Action

input to Commit.

Reverification

Repeat Verification to determine the As-Left status of the device.

Note If any test fails reverification after performing an adjustment, verify that you

have met all the conditions listed in Test Conditions before returning your device to

NI. Refer to NI Services for assistance in returning the device to NI.

Accuracy Under Calibration Conditions

The values in the following table are based on calibrated scaling coefficients, which are stored

in the onboard EEPROM.

The following accuracy table is valid for calibration under the following conditions:

• Ambient temperature 23 °C ± 5 °C

• No nodes share power with the FieldDAQ device under calibration

The test limits listed in Table 3 are derived using the values in the following table.

Table 8. FD-11634 Voltage Accuracy Under Calibration Conditions

Range

As-Found Accuracy As-Left Accuracy

Percent of Reading (Gain

Error) Offset Error

Percent of Reading (Gain

Error) Offset Error

10 V ±0.08% ±2 mV ±0.01% ±0.94 mV

1 V ±0.10% ±0.3 mV ±0.014% ±0.12 mV

Note Values in this table are intended for calibration verification only. These

values only apply under the specific calibration conditions described in this

document, and are not to be construed as general operational specifications of the

FD-11634. For operational specifications, refer to the most recent FD-11634

Specifications at ni.com/manuals.

Signal Connector Pinout

Figure 6. FD-11634 Pinout

AI–NC

NCAI+

Table 9. Signal Descriptions

Pin Number Wire Color* Signal Description

Brown

Blue

Gray

NC No connect. Do not connect signals to

this terminal.

2 White AI- Negative analog input signal and

TEDS return

4 Black AI+ Positive analog input signal and

TEDS data

* Wire color pertains to SHM125M I/O cables sold through NI. Other manufacturers' cable

wire colors may vary.

Revision History

Table 10. Revision History for the FD-11634 Calibration Procedure

Revision Affected Section Change(s)

377929A-01 (September 2020) — This is the initial release of the

FD-11634 Calibration Procedure.

NI Services

Visit ni.com/support to find support resources including documentation, downloads, and

troubleshooting and application development self-help such as tutorials and examples.

Visit ni.com/services to learn about NI service offerings such as calibration options, repair, and

replacement.

10 | ni.com | FD-11634 Calibration Procedure

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