National Instruments FD-11601 Manual

CALIBRATION PROCEDURE

FD-11601

8-Channel, ±10 V Powered-Sensor Voltage Input Device for FieldDAQ

This document contains information for calibrating the FD-11601. 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....................................................................................................................8

Accuracy Under Calibration Conditions...................................................................................8

Signal Connector Pinout........................................................................................................... 9

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

Worldwide Support and Services............................................................................................ 10

Software Requirements

Calibrating the FD-11601 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-11601 is listed in the following table.

Table 1. FD-11601 Driver Support

Driver Earliest Version Support for Device Calibration

NI-DAQmx 19.0

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-11601 Quick Start— Provides instructions for installing and configuring your

FieldDAQ device.

FD-11601 User Guide—Provides information about your FieldDAQ device.

FD-11601 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-11601. If you do not

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

equipment.

2| ni.com | FD-11601 Calibration Procedure

Table 2. Recommended Test Equipment

Equipment Recommended Model Minimum Requirements

Calibrator Fluke 5502A High-precision voltage source with

gain uncertainty of ≤50 ppm and

offset uncertainty of ≤50 μV

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-11601 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 8

FD-11601 Calibration Procedure | © National Instruments | 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-11601 Quick Start.

Note You must install NI-DAQmx 19.0 or later for device calibration support.

2. Set up the FieldDAQ device as outlined in the FD-11601 Quick Start.

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

outlined in the FD-11601 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-11601 Calibration Procedure

Figure 1. Bank 1 Verification Connections

AI 0+

AI 0–

AI 1+

AI 1–

Calibrator

FD-11601

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-11601 Test Limits

Test Point 1-Year Limits

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

Negative Full Scale -10.0 -10.00475 -9.99525

Mid 0.0 -0.00105 0.00105

Positive Full Scale 10.0 9.99525 10.00475

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).

FD-11601 Calibration Procedure | © National Instruments | 5

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-11601 Accuracy Verification Configuration

Physical Channel Minimum Maximum Scaled Units Channel Configuration

FD11601-Bank1/ai0:3 -10 10 Volts Differential

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

Table 5. FD-11601 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.

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-11601, as shown in the following figure.

Refer to Signal Connector Pinout for signal connection information.

Figure 3. Bank 2 Verification Connections

AI 0+

AI 0–

AI 1+

AI 1–

Calibrator

FD-11601

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 FD11601-Bank2/ai0:3 as the physical

channel.

6| ni.com | FD-11601 Calibration Procedure

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-11601

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 Get FD-11601 Calibration Adjustment Points function.

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

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

e. Call and configure the Adjust FD-11601 Calibration function according to the

following table.

Table 6. Adjustment Configuration

Physical Channel Reference Value

FD11601-Bank1/ai0:3 A reference value from the array of adjustment points

f. 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-11601, as shown in the following figure.

Refer to Signal Connector Pinout for signal connection information.

FD-11601 Calibration Procedure | © National Instruments | 7

Figure 5. Bank 2 Adjustment Connections

AI 0+

AI 0–

AI 1+

AI 1–

Calibrator

FD-11601

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 6 for Bank 2 using

FD11601-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.

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 Worldwide Support and 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.

8| ni.com | FD-11601 Calibration Procedure

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 7. FD-11601 Voltage Accuracy Under Calibration Conditions

Percent of Reading (Gain Error) Offset Error

±0.037% ±1.05 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-11601. For operational specifications, refer to the most recent FD-11601

Specifications at ni.com/manuals.

Signal Connector Pinout

Figure 6. FD-11601 Pinout

AI–SP

GND/T–AI+

T+

Table 8. Signal Descriptions

Pin Number Wire Color* Signal Description

1 Brown SP Sensor power

2 White AI- Negative analog input voltage

signal

3 Blue GND/T- Sensor power ground and

TEDS return

4 Black AI+ Positive analog input voltage

signal

5 Gray T+ TEDS data

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

wire colors may vary.

FD-11601 Calibration Procedure | © National Instruments | 9

Revision History

Table 9. Revision History for the FD-11601 Calibration Procedure

Revision Affected Section Change(s)

378332A-01 (June 2020) — This is the initial release of the FD-11601

Calibration Procedure.

Worldwide Support and Services

The NI website is your complete resource for technical support. At ni.com/support, you have

access to everything from troubleshooting and application development self-help resources to

email and phone assistance from NI Application Engineers.

Visit ni.com/services for information about the services NI offers.

Visit ni.com/register to register your NI product. Product registration facilitates technical

support and ensures that you receive important information updates from NI.

NI corporate headquarters is located at 11500 North Mopac Expressway, Austin, Texas,

78759-3504, USA. For up-to-date contact information for your location, visit ni.com/contact.

Information is subject to change without notice. Refer to the NI Trademarks and Logo Guidelines at ni.com/trademarks for

information on NI trademarks. Other product and company names mentioned herein are trademarks or trade names of their

respective companies. For patents covering NI products/technology, refer to the appropriate location: Help»Patents in your

software, the patents.txt file on your media, or the National Instruments Patent Notice at ni.com/patents. You can find

information about end-user license agreements (EULAs) and third-party legal notices in the readme file for your NI product. Refer

to the Export Compliance Information at ni.com/legal/export-compliance for the NI global trade compliance policy and how

to obtain relevant HTS codes, ECCNs, and other import/export data. NI MAKES NO EXPRESS OR IMPLIED WARRANTIES AS

TO THE ACCURACY OF THE INFORMATION CONTAINED HEREIN AND SHALL NOT BE LIABLE FOR ANY ERRORS. U.S.

Government Customers: The data contained in this manual was developed at private expense and is subject to the applicable

limited rights and restricted data rights as set forth in FAR 52.227-14, DFAR 252.227-7014, and DFAR 252.227-7015.

378332A-01 June 29, 2020

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