Tektronix DAQ6510 Service

www.tek.com/keithley

Model DAQ6510 Data Acquisition and Multimeter System

Calibration and Adjustment Manual

DAQ6510-905-01 Rev. D June 2022

*PDAQ6510-905-01D*

DAQ6510-905-01D

Data Acquisition and Multimeter System

DAQ6510

Calibration and Adjustment Manual

Cleveland, Ohio, U.S.A.

Any unauthorized reproduction, photocopy, or use of the information herein, in whole or in part,

without the prior written approval of Keithley Instruments, LLC, is strictly prohibited.

These are the original instructions in English.

TSPTM and TSP-LinkTM are trademarks of Keithley Instruments, LLC. All Keithley Instruments

product names are trademarks or registered trademarks of Keithley Instruments, LLC. Other brand

names are trademarks or registered trademarks of their respective holders.

PUC-Rio. Terms of license for the Lua software and associated documentation can be accessed at

the Lua licensing site (http://www.lua.org/license.html).

Microsoft, Visual C++, Excel, and Windows are either registered trademarks or trademarks of

Microsoft Corporation in the United States and/or other countries.

Document number: DAQ6510-905-01 Rev. D June 2022

Safety precautions

The following safety precautions should be observed before using this product and any associated instrumentation. Although some instruments and accessories would normally be used with nonhazardous voltages, there are situations where hazardous conditions may be present.

This product is intended for use by personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury. Read and follow all installation, operation, and maintenance information carefully before using the product. Refer to the user documentation for complete product specifications.

If the product is used in a manner not specified, the protection provided by the product warranty may be impaired.

The types of product users are:

Responsible body is the individual or group responsible for the use and maintenance of equipment, for ensuring that the equipment is operated within its specifications and operating limits, and for ensuring that operators are adequately trained.

Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the instrument. They must be protected from electric shock and contact with hazardous live circuits.

Maintenance personnel perform routine procedures on the product to keep it operating properly, for example, setting the line voltage or replacing consumable materials. Maintenance procedures are described in the user documentation. The procedures explicitly state if the operator may perform them. Otherwise, they should be performed only by service personnel.

Service personnel are trained to work on live circuits, perform safe installations, and repair products. Only properly trained service personnel may perform installation and service procedures.

Keithley products are designed for use with electrical signals that are measurement, control, and data I/O connections, with low transient overvoltages, and must not be directly connected to mains voltage or to voltage sources with high transient overvoltages. Measurement Category II (as referenced in IEC 60664) connections require protection for high transient overvoltages often associated with local AC mains connections. Certain Keithley measuring instruments may be connected to mains. These instruments will be marked as category II or higher.

Unless explicitly allowed in the specifications, operating manual, and instrument labels, do not connect any instrument to mains.

Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test fixtures. The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than 30 V RMS, 42.4 V peak, or 60 VDC are present. A good safety practice is to expect that hazardous voltage is present in any unknown circuit before measuring.

Operators of this product must be protected from electric shock at all times. The responsible body must ensure that operators are prevented access and/or insulated from every connection point. In some cases, connections must be exposed to potential human contact. Product operators in these circumstances must be trained to protect themselves from the risk of electric shock. If the circuit is capable of operating at or above 1000 V, no conductive part of the circuit may be exposed.

Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance-limited sources. NEVER connect switching cards directly to AC mains. When connecting sources to switching cards, install protective devices to limit fault current and voltage to the card.

Before operating an instrument, ensure that the line cord is connected to a properly-grounded power receptacle. Inspect the connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.

When installing equipment where access to the main power cord is restricted, such as rack mounting, a separate main input power disconnect device must be provided in close proximity to the equipment and within easy reach of the operator.

For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under test. ALWAYS remove power from the entire test system and discharge any capacitors before connecting or disconnecting cables or jumpers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers.

Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth) ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the voltage being measured.

For safety, instruments and accessories must be used in accordance with the operating instructions. If the instruments or accessories are used in a manner not specified in the operating instructions, the protection provided by the equipment may be impaired.

Do not exceed the maximum signal levels of the instruments and accessories. Maximum signal levels are defined in the specifications and operating information and shown on the instrument panels, test fixture panels, and switching cards.

When fuses are used in a product, replace with the same type and rating for continued protection against fire hazard.

Chassis connections must only be used as shield connections for measuring circuits, NOT as protective earth (safety ground) connections.

If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation requires the use of a lid interlock.

If a screw is present, connect it to protective earth (safety ground) using the wire recommended in the user documentation.

The symbol on an instrument means caution, risk of hazard. The user must refer to the operating instructions located in the user documentation in all cases where the symbol is marked on the instrument.

The symbol on an instrument means warning, risk of electric shock. Use standard safety precautions to avoid personal contact with these voltages.

The symbol on an instrument shows that the surface may be hot. Avoid personal contact to prevent burns.

The symbol indicates a connection terminal to the equipment frame.

If this symbol is on a product, it indicates that mercury is present in the display lamp. Please note that the lamp must be properly disposed of according to federal, state, and local laws.

The WARNING heading in the user documentation explains hazards that might result in personal injury or death. Always read the associated information very carefully before performing the indicated procedure.

The CAUTION heading in the user documentation explains hazards that could damage the instrument. Such damage may invalidate the warranty.

The CAUTION heading with the symbol in the user documentation explains hazards that could result in moderate or minor injury or damage the instrument. Always read the associated information very carefully before performing the indicated procedure. Damage to the instrument may invalidate the warranty.

Instrumentation and accessories shall not be connected to humans.

Before performing any maintenance, disconnect the line cord and all test cables.

To maintain protection from electric shock and fire, replacement components in mains circuits — including the power transformer, test leads, and input jacks — must be purchased from Keithley. Standard fuses with applicable national safety approvals may be used if the rating and type are the same. The detachable mains power cord provided with the instrument may only be replaced with a similarly rated power cord. Other components that are not safety-related may be purchased from other suppliers as long as they are equivalent to the original component (note that selected parts should be purchased only through Keithley to maintain accuracy and functionality of the product). If you are unsure about the applicability of a replacement component, call a Keithley office for information.

Unless otherwise noted in product-specific literature, Keithley instruments are designed to operate indoors only, in the following environment: Altitude at or below 2,000 m (6,562 ft); temperature 0 °C to 50 °C (32 °F to 122 °F); and pollution degree 1 or 2.

To clean an instrument, use a cloth dampened with deionized water or mild, water-based cleaner. Clean the exterior of the instrument only. Do not apply cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that consist of a circuit board with no case or chassis (e.g., a data acquisition board for installation into a computer) should never require cleaning if handled according to instructions. If the board becomes contaminated and operation is affected, the board should be returned to the factory for proper cleaning/servicing.

Safety precaution revision as of June 2018.

Introduction ............................................................................................................... 1-1

Welcome .............................................................................................................................. 1-1

Introduction to this manual ................................................................................................... 1-1

Extended warranty ............................................................................................................... 1-2

Contact information .............................................................................................................. 1-2

Performance verification .......................................................................................... 2-1

Introduction .......................................................................................................................... 2-1

Verification test requirements .............................................................................................. 2-2

Environmental conditions .......................................................................................................... 2-2

Warmup period .......................................................................................................................... 2-2

Line power................................................................................................................................. 2-3

Recommended test equipment ................................................................................................. 2-3

Calibration verification limits ................................................................................................ 2-4

Example reading limit calculation .............................................................................................. 2-4

Calculating resistance reading limits ......................................................................................... 2-4

Performing the verification test procedures ......................................................................... 2-5

Test summary ........................................................................................................................... 2-5

Test considerations ................................................................................................................... 2-5

Front-panel calibration verification ....................................................................................... 2-6

DC voltage verification .............................................................................................................. 2-6

AC voltage verification .............................................................................................................. 2-9

Digitize dc voltage verification ................................................................................................. 2-14

Frequency verification ............................................................................................................. 2-17

Simulated thermocouple type J temperature verification ......................................................... 2-18

Simulated RTD temperature verification ................................................................................. 2-20

Resistance verification ............................................................................................................ 2-24

DC current verification ............................................................................................................. 2-29

Digitize current verification ...................................................................................................... 2-33

AC current verification ............................................................................................................. 2-36

Capacitance verification .......................................................................................................... 2-39

Verifying zero values using a 4-wire short ............................................................................... 2-41

Rear-panel verification ....................................................................................................... 2-43

Adjustment ................................................................................................................ 3-1

Introduction .......................................................................................................................... 3-1

Environmental conditions ..................................................................................................... 3-2

Temperature and relative humidity ............................................................................................ 3-2

Line power................................................................................................................................. 3-2

Warmup period ..................................................................................................................... 3-2

Adjustment overview ............................................................................................................ 3-3

Recommended test equipment ............................................................................................ 3-3

General adjustment considerations ..................................................................................... 3-4

Initial instrument setup ......................................................................................................... 3-5

Table of contents

Calibration and Adjustment Manual

DAQ6510 Data Acquisition and Multimeter System

Select the correct terminals ....................................................................................................... 3-5

Select the TSP command set .................................................................................................... 3-5

Verify instrument date and time ................................................................................................. 3-6

Set up remote connections........................................................................................................ 3-6

Unlock calibration ...................................................................................................................... 3-6

Remote calibration adjustment procedures ......................................................................... 3-7

Disable temperature correction ................................................................................................. 3-7

Front-terminal adjustment with a 4-wire short ........................................................................... 3-7

Rear-terminal adjustment with a 4-wire short .......................................................................... 3-10

Front-terminal adjustment with open circuit inputs .................................................................. 3-11

Rear-terminal adjustment with open circuit inputs ................................................................... 3-13

Resistance adjustment ............................................................................................................ 3-14

DC voltage adjustment ............................................................................................................ 3-16

DC current adjustment ............................................................................................................ 3-17

AC voltage adjustment ............................................................................................................ 3-21

AC current adjustment ............................................................................................................ 3-23

Frequency adjustment ............................................................................................................. 3-25

Complete list of calibration commands .................................................................................... 3-26

Enable temperature correction ........................................................................................... 3-38

Save calibration and set the adjustment dates .................................................................. 3-39

Setting time, adjustment, and verification dates ................................................................ 3-39

Adjustment command timing and error checking ............................................................... 3-40

Handling events ................................................................................................................. 3-40

TSP command reference .......................................................................................... 4-1

TSP commands .................................................................................................................... 4-1

Introduction ............................................................................................................................... 4-1

cal.adjust.count ......................................................................................................................... 4-2

cal.adjust.date ........................................................................................................................... 4-3

cal.adjust.step.setup() ............................................................................................................... 4-4

cal.adjust.step.execute() ........................................................................................................... 4-5

cal.lock() .................................................................................................................................... 4-6

cal.password ............................................................................................................................. 4-7

cal.save()................................................................................................................................... 4-8

cal.unlock() ................................................................................................................................ 4-9

cal.verify.date .......................................................................................................................... 4-10

Contact information ...................................................................1-2

In this section:

Welcome

The DAQ6510 is a 6½-digit data acquisition and logging multimeter system that has a touchscreen user interface that enables faster setup time, real-time monitoring of test status, and detailed analysis on the instrument.

Section 1

Introduction

Welcome ...................................................................................1-1

Introduction to this manual ........................................................1-1

Extended warranty ....................................................................1-2

This manual provides information on completing verification and adjustment procedures for your DAQ6510.

Introduction to this manual

This manual provides instructions to help you calibrate and adjust your DAQ6510. In this manual, calibration refers to the process of verifying that the accuracy of the instrument is within its one-year accuracy specifications. Also, adjustment refers to the process of changing the calibration constants so that the accuracy of the instrument is within its one-year accuracy specifications.

This manual presents calibration information, adjustment information, and command descriptions for the calibration and adjustment commands.

For additional command descriptions, refer to the DAQ6510 Reference Manual available on the

Product Support and Downloads web page (tek.com/en/support/product-support

to the Release Notes for your instrument that contains relevant information on improvements, changes, and known issues.

). Additionally, refer

Section

Calibration and Adjustment Manual

1: Introduction DAQ6510 Data Acquisition and Multimeter System

Extended warranty

Additional years of warranty coverage are available on many products. These valuable contracts protect you from unbudgeted service expenses and provide additional years of protection at a fraction of the price of a repair. Extended warranties are available on new and existing products. Contact your local Keithley Instruments office, sales partner, or distributor for details.

Contact information

If you have any questions after you review the information in this documentation, please contact your local Keithley Instruments office, sales partner, or distributor. You can also call the Tektronix corporate headquarters (toll-free inside the U.S. and Canada only) at 1-800-833-9200. For worldwide contact numbers, visit tek.com/contact

1-2 DAQ6510-905-01 Rev. D June 2022

Rear-panel verification ............................................................2-43

In this section:

Introduction ...............................................................................2-1

Verification test requirements ....................................................2-2

Calibration verification limits......................................................2-4

Performing the verification test procedures ...............................2-5

Front-panel calibration verification ............................................2-6

Introduction

Use the procedures in this section to verify that DAQ6510 accuracy is within the limits stated in the instrument’s one-year accuracy specifications. Specifications and characteristics are subject to change without notice; refer to the Product Support and Downloads web page (tek.com/en/support/product-support) for the most recent specifications.

Section 2

Performance verification

You can use these verification procedures to:

• Make sure that the instrument was not damaged during shipment.

• Verify that the instrument meets factory specifications.

• Determine if adjustment is required.

• Verify that adjustment was done properly.

Although the following tests are based on the Model 7700 20-Channel Differential Multiplexer Module, the same general procedures can be used for other switching modules that have similar capabilities. Refer to the user's manual for your specific module for information on terminal connections.

The information in this section is intended for qualified service personnel only, as described by the types of product users in the Safety precautions pages, provided at the beginning of this document. Do not attempt these procedures unless you are qualified to do so.

Some of these procedures may expose you to hazardous voltages, that if contacted, could

ause personal injury or death. Use appropriate safety precautions when working with

c hazardous voltages.

Section

Calibration and Adjustment Manual

2: Performance verification DAQ6510 Data Acquisition and Multimeter System

If the instrument is still under warranty and its performance is outside specified limits, please contact your local Keithley Instruments office, sales partner, or distributor. You can also call the Tektronix corporate headquarters (toll-free inside the U.S. and Canada only) at 1-800-833-9200. For worldwide contact numbers, visit tek.com/contact

Verification test requirements

Be sure that you perform these verification tests:

• Under the proper environmental conditions.

• After the specified warmup period.

• Using the correct line voltage.

• Using the proper test equipment.

• Using the specified output signal and reading limits.

Environmental conditions

Conduct the calibration verification procedures in a test environment with:

• An ambient temperature of 18 °C to 28 °C.

• A relative humidity of less than or equal to 80 percent, unless otherwise noted.

• No direct airflow on the input terminals.

Warmup period

Allow the DAQ6510 to warm up for at least 30 minutes before conducting the calibration verification procedures.

If the instrument has been subjected to temperature extremes (more than 5 °C above or below T allow additional time for the internal temperature of the instrument to stabilize. Typically, allow an additional 30 minutes to stabilize an instrument that is 10 °C outside the specified temperature range.

Also allow the test equipment to warm up for the time recommended by the manufacturer.

CAL

2-2 DAQ6510-905-01 Rev. D June 2022

DAQ6510

Performance verification

Fluke

5720A or 5730A

High-Performance

DCV, ACV, ACI, and

See following Fluke

5725A

Amplifier

DCI and ACI

See following note.

Multimeter

note.

Keithley Instruments

3390

Function/Arbitrary Waveform Generator

Frequency

See following note.

IET Labs, Inc.

1423-A

Precision Decade

Capacitance, 1 nF to

See following

IET Labs, Inc.

HACS-Z-A-2E-1uF

Series HACS-Z High

Capacitance Box

Capacitance, 1 µF to

See following Keithley

8610 or 8620

4-Wire DMM Shorting

DCV, digitize DCV, and

See following

Data Acquisition and Multimeter System Calibration and Adjustment Manual Section 2:

Line power

The DAQ6510 requires a line voltage of 100 V to 240 V and a line frequency of 400 Hz, 50 Hz or 60 Hz. Calibration verification tests should be performed within this range.

The instrument automatically senses the line frequency at power-up.

Recommended test equipment

The following table summarizes the recommended calibration verification equipment. You can use alternate equipment if that equipment has specifications that meet or exceed those listed in the table below. Test equipment uncertainty adds to the uncertainty of each measurement. Generally, test equipment uncertainty should be at least four times more accurate than corresponding DAQ6510 specifications.

In this manual, the Model 8610 shorting plug is shown in the figures. However, you can use either the Mode

Manufacturer Model Description Used for Uncertainty

Fluke 8508A or 8588A 8.5-Digit Reference

Instruments

l 8610 or the Model 8620 shorting plug.

Multifunction Calibrator

Capacitor

Accuracy Decade

Plug

resistance

DCI See following

1 µF

100 µF

resistance

note.

Refer to the manufacturer's specifications to calculate the uncertainty, which varies for each function and range test point.

DAQ6510-905-01 Rev. D June 2022 2-3

Section

Calibration and Adjustment Manual

2: Performance verification DAQ6510 Data Acquisition and Multimeter System

Calibration verification limits

The calibration verification limits stated in this section have been calculated using only the DAQ6510 one-year accuracy specifications and ambient temperature ±5 °C from T the instrument was calibrated). They do not include test equipment uncertainty. If a particular measurement falls outside the allowable range, recalculate new limits based on both the DAQ6510 specifications and corresponding test equipment specifications.

Specifications and characteristics are subject to change without notice; please refer to

tek.com/keithley

Example reading limit calculation

Assume you are testing the 10 V dc range using a 10 V input value. Using the DAQ6510 one-year accuracy specification for 10 V dc of ± (25 ppm of reading + 5 ppm of range), the calculated limits are:

• Reading limits = 10 V ± [(10 V × 25 ppm) + (10 V × 5 ppm)]

for the most recent specifications.

(the temperature at which

CAL

• Reading limits = 10 V ± (0.00025 + 0.00005) V

• Reading limits = 10 V ± 0.00030 V

• Reading limits = 9.99970 V to 10.00030 V

Calculating resistance reading limits

Resistance reading limits must be recalculated based on the actual calibration resistance values supplied by the equipment manufacturer. Calculations are performed in the same manner as shown in the preceding example. Use the actual calibration resistance values instead of the nominal values in the example when performing your calculations.

For example, assume that you are testing the 10 kΩ range using an actual 10.03 kΩ calibration resistance value. Using DAQ6510 one-year 10 kΩ range accuracy of ± (75 ppm of reading + 6 ppm of range), the calculated reading limits are:

• Reading limits = 10.03 kΩ ± [(10.03 kΩ x 75 ppm) + (10 kΩ x 6 ppm)]

• Reading limits = 10.03 kΩ ± [(0.7523) + (0.06)] Ω

• Reading limits = 10.03 kΩ ± 0.8123 Ω

• Reading limits = 10.029188 kΩ to 10.030812 kΩ

2-4 DAQ6510-905-01 Rev. D June 2022

DAQ6510

Performance verification

Data Acquisition and Multimeter System Calibration and Adjustment Manual Section 2:

Performing the verification test procedures

The following topics provide a summary of calibration verification test procedures and items to consider before performing any calibration verification test.

Test summary

Front-panel tests:

• DC voltage verification (on page 2-6)

• AC voltage verification (on page 2-9)

• Digitize voltage verification (on page 2-14)

• Frequency verification (on page 2-17)

• Simulated thermocouple type J temperature verification (on page 2-18)

• Simulated RTD temperature verification (on page 2-20)

• Resistance verification (on page 2-24)

• DC current verification (on page 2-29)

• Digitize current verification (on page 2-33)

• AC current verification (on page 2-36)

• Capacitance verification (on page 2-39)

• Verifying zero values using a 4-wire short (on page 2-41)

Test considerations

When performing the calibration verification procedures:

• Be sure to restore factory front-panel defaults. From the front panel, select the MENU key, select

Info/Manage, and select System Reset.

• Make sure that the test equipment is warmed up for the time recommended by the manufacturer

and is connected to the DAQ6510 input/output terminals.

• Make sure that the correct DAQ6510 terminals are selected with the TERMINALS FRONT/REAR

switch.

• Make sure the test equipment is set up for the proper function and range.

• Do not connect test equipment to the DAQ6510 through a scanner, multiplexer, or other switching

DAQ6510-905-01 Rev. D June 2022 2-5

equipment.

Section

Calibration and Adjustment Manual

2: Performance verification DAQ6510 Data Acquisition and Multimeter System

The front and rear terminals of the instrument are rated for connection to circuits rated Measurement Category II up to 300 V, as described in International Electrotechnical Commission (IEC) Standard IEC 60664. This range must not be exceeded. Do not connect the instrument terminals to CAT III or CAT IV circuits. Connection of the instrument terminals to circuits higher than CAT II can cause damage to the equipment and severe personal injury.

Front-panel calibration verification

The following topics describe verification procedures that are done with connections attached to the terminals on the DAQ6510 front panel.

DC voltage verification

The maximum input voltage between INPUT HI and INPUT LO is 1000 V dc and 750 V ac. Exceeding this value may create a shock hazard.

The maximum common-mod 500 V

. Exceeding this value may cause a breakdown in insulation that can create a shock

PEAK

e voltage (the voltage between INPUT LO and chassis ground) is

hazard.

Verify dc voltage accuracy for the 100 mV to 1000 V ranges

To verify 100 mV to 1000 V dc voltage accuracies, you will:

• Apply accurate dc voltages from the calibrator to the DAQ6510 front-panel terminals.

• Verify that the displayed readings are within specified limits.

• Use the values in the tables following the steps below to verify the performance of the DAQ6510.

Actual values depend on the published specifications (see Example reading limit calculation (on page 2-4)).

Use shielded low-ther caused by noise or thermal effects. Connect the shield to the output LO terminal of the calibrator.

mal connections when testing the 100 mV and 1 V ranges to avoid errors

2-6 DAQ6510-905-01 Rev. D June 2022

DAQ6510

Performance verification

Data Acquisition and Multimeter System Calibration and Adjustment Manual Section 2:

To verify dc voltage accuracy:

1. Use a low-thermal cable to connect the DAQ6510 HI and LO INPUT terminals to the calibrator HI and LO terminals as shown in the following figure.

Figure 1: DC voltage 100 mV to 1000 V ranges verification connections

2. On the DAQ6510, press the FUNCTION key and select DC voltage.

3. On the home screen, select the button next to Range and select 100 mV.

4. Press the MENU key.

5. Under Measure, select Settings.

6. Set Input Impedance to Auto.

7. Set the calibrator output to 0 V.

8. Set the calibrator to OPERATE.

9. Allow 5 minutes of settling time.

10. Press the MENU key.

11. Select Calculations.

12. [Only for the 100 mV range] Select Rel Acquire.

13. Source positive and negative full-scale and half-scale voltages and allow for proper settling.

14. Select each range on the DAQ6510, allow for proper settling, and verify the ranges according to the following tables.

DAQ6510-905-01 Rev. D June 2022 2-7

Section

Calibration and Adjustment Manual

Perform relative offset

-0.01

0.01 Full scale (+)

100

99.9935

100.0065

Half scale (–)

-50

-50.005

-49.995

Full scale (–)

-100

-100.0065

-99.9935

Full scale (+)

0.999969

1.000031

Half scale (+)

0.5

0.499979

0.500021

Half scale (–)

-0.5

-0.500021

-0.499979

Full scale (–)

–1

–1.000031

-0.999969

Full scale (+)

9.9997

10.0003

Half scale (+)

4.99982

5.00018

Half scale (–)

–5

–5.00018

–4.99982

Full scale (–)

–10

–10.0003

–9.9997

2: Performance verification DAQ6510 Data Acquisition and Multimeter System

Verify the dc voltage 100 mV range

Description Nominal value Lower limit Upper limit

Half scale (+) 50 49.995 50.005

Verify the dc voltage 1 V range

Description Nominal value Lower limit Upper limit

Verify the dc voltage 10 V range

Description Nominal value Lower limit Upper limit

2-8 DAQ6510-905-01 Rev. D June 2022

DAQ6510

Performance verification

Full scale (+)

100

99.954

100.0046

Half scale (–)

-50

-50.00315

-49.99685

Full scale (–)

-100

-100.0054

-99.9946

Full scale (+)

1000

999.944

1000.056

Half scale (+)

500

499.974

500.026

Half scale (–)

-500

-500.026

-499.974

Full scale (–)

-1000

-1000.069

-999.931

Data Acquisition and Multimeter System Calibration and Adjustment Manual Section 2:

Verify the dc voltage 100 V range

Some of these procedures may expose you to hazardous voltages, that if contacted, could c

ause personal injury or death. Use appropriate safety precautions when working with

hazardous voltages.

Description Nominal value Lower limit Upper limit

Half scale (+) 50 49.99685 50.00315

Verify the dc voltage 1000 V range

Description Nominal value Lower limit* Upper limit*

*For each additional volt over ±500 V, add 0.02 mV of uncertainty.

AC voltage verification

To verify ac voltage accuracy:

• For the 100 mV to 100 V ranges, apply accurate voltages from the calibrator to the DAQ6510

front-panel terminals.

• For the 750 V range, connect the Fluke 5725A Amplifier to the calibrator. Apply accurate voltages

from the calibrator terminals to the terminals on the front panel of the DAQ6510.

• Verify that the displayed readings are within specified limits.

Use the values in the tables following the steps below to verify the performance of the DAQ6510. Actual values depend on the published specifications (see Example reading limit calculation (

on page

2-4)).

DAQ6510-905-01 Rev. D June 2022 2-9

Section

Calibration and Adjustment Manual

2: Performance verification DAQ6510 Data Acquisition and Multimeter System

The maximum input voltage between INPUT HI and INPUT LO is 750 V dc. Exceeding this value may create a shock hazard.

The maximum common-mo 500 V

. Exceeding this value may cause a breakdown in insulation that can create a shock

PEAK

de voltage (the voltage between INPUT LO and chassis ground) is

hazard.

Verify ac voltage accuracy for the 100 mV to 100 V ranges

Use shielded, low-capacitance cabling. For the 100 mV to 100 V ranges, avoid loading that exceeds 1000 pF.

Excessive capacitance may result in additional load regulation uncertainties and could cause the cal

ibrator output to open (go into standby).

To verify ac voltage accuracy:

1. Connect the DAQ6510 HI and LO INPUT connectors to the calibrator as shown in the following figure.

Figure 2: Connections for ac voltage verification 100 mV to 100 V ranges

2-10 DAQ6510-905-01 Rev. D June 2022

DAQ6510

Performance verification

0.1

1 kHz

99.91

100.09

0.1

100 kHz

99.32

100.68

1 kHz

.9991

1.0009

100 kHz

.9932

1.0068

Data Acquisition and Multimeter System Calibration and Adjustment Manual Section 2:

2. On the DAQ6510, press the FUNCTION key and select AC voltage.

3. On the home screen, select the button next to Range and select 100 mV.

4. Press the MENU key.

5. Under Measure, select Settings.

6. Make sure that detector bandwidth is set to 30 Hz.

AC voltage is specified for the detector bandwidth setting of 3 Hz. Three Hz measures accurately for input signals from 3 Hz to 300 kHz, with reading rates ≈ 2 readings/s. To improve verification throughput to ≈ 20 readings/s, set detector bandwidth to 30 Hz for frequencies of 30 Hz to 300 kHz. To verify frequencies 1 kHz and higher, set the detector bandwidth to 300 Hz for faster ≈ 200 readings/s throughput.

7. Source ac voltages for each of the frequencies listed in the Verify the ac voltage 100 mV range (on page 2-11) table.

8. Repeat these steps for each range and frequency listed in the tables below. For each voltage setting, be sure that the reading is within low and high limits.

Verify the ac voltage 100 mV range

Nominal value Frequency Lower limit Upper limit

0.1 20 Hz 99.91 100.09

0.1 50 kHz 99.83 100.17

Verify the ac voltage 1 V range

Nominal value Frequency Lower limit Upper limit

1 20 Hz .9991 1.0009

1 50 kHz .9983 1.0017

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Calibration and Adjustment Manual

20 Hz

9.991

10.009

1 kHz

9.991

10.009

50 kHz

9.983

10.017

100 kHz

9.932

10.068

100

20 Hz

99.910

100.09

100

50 kHz

99.830

100.17

100

100 kHz

99.320

100.68

2: Performance verification DAQ6510 Data Acquisition and Multimeter System

Verify the ac voltage 10 V range

Nominal value Frequency Lower limit Upper limit

Verify the ac voltage 100 V range

Nominal value Frequency Lower limit Upper limit

100 1 kHz 99.910 100.09

Verify ac voltage accuracy for the 750 V range

Use shielded low capacitance cabling. For the 750 V range, avoid cable capacitances of >150 pF.

Excessive capacitance may result in additional load regulation uncertainties and could cause the

alibrator output to open (go into standby).

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Performance verification

Data Acquisition and Multimeter System Calibration and Adjustment Manual Section 2:

To verify ac voltage accuracy for the 750 V range:

1. Put the calibrator in Standby.

2. Connect the DAQ6510 HI and LO INPUT connectors to the calibrator as shown in the following figure.

3. For 750 V at 50 kHz and 100 kHz outputs, connect the calibrator to the Fluke 5725A amplifier.

Figure 3: Connections for ac voltage accuracy verification 750 V range

4. On the DAQ6510, press the FUNCTION key and select AC voltage.

5. On the home screen, select the button next to Range and select 750 V.

6. Press the MENU key.

7. Under Measure, select Settings.

8. Ensure that detector bandwidth is set to 30 Hz.

AC voltage is specified for the detector bandwidth setting of 3 Hz. Three Hz measures accurately for input signals from 3 Hz to 300 kHz, with reading rates ≈ 2 readings/s. To improve verification throughput to ≈ 200 readings/s, set detector bandwidth to 30 Hz for frequencies of 30 Hz to 300 kHz. To verify frequencies 1 kHz and higher, set the detector bandwidth to 300 Hz for faster ≈ 200 readings/s throughput.

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Calibration and Adjustment Manual

740

50 Hz

739.33

740.67

740

50 kHz

738.66

741.34

740

100 kHz

734.96

745.04

2: Performance verification DAQ6510 Data Acquisition and Multimeter System

9. Set the calibrator to OPERATE.

10. Source ac voltages for each of the frequencies listed in the "Verify the ac voltage 750 V range" table, below. Be sure that the readings are within low and high limits.

Verify the ac voltage 750 V range

Nominal value Frequency Lower limit Upper limit

740 1 kHz 739.33 740.67

Digitize dc voltage verification

To verify digitize dc voltage accuracy, you will:

• Apply accurate voltages from the calibrator to the terminals on the front panel of the DAQ6510.

• Verify that the displayed readings are within specified limits.

Use the values in the tables following the steps below to verify the performance of the DAQ6510. Actual values depend on the published specifications (see Example reading limit calculation (on page 2-4)).

The maximum input voltage between INPUT HI and INPUT LO is 1000 V dc and 750 V ac. Exceeding this value may create a shock hazard.

The maximum common-mo 500 V

. Exceeding this value may cause a breakdown in insulation that can create a shock

PEAK

de voltage (the voltage between INPUT LO and chassis ground) is

hazard.

Verify the digitize voltage 100 mV to 1000 V ranges

Use shielded low-thermal connections when testing the 100 mV and 1 V ranges to avoid errors caused by noise or thermal effects. Connect the shield to the output LO terminal of the calibrator.

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Data Acquisition and Multimeter System Calibration and Adjustment Manual Section 2:

To verify digitize voltage accuracy:

1. Connect the DAQ6510 HI and LO INPUT connectors to the calibrator as shown in the following figure.

Figure 4: Connections for digitize voltage verification 100 mV to 1000 V ranges

2. On the DAQ6510, press the FUNCTION key, select the Digitize Functions tab, and select Digitize Voltage.

3. On the home screen, select the button next to Range and select 100 mV.

4. Press the MENU key.

5. Under Measure, select Settings.

6. Set the Sample Rate to 1000.

7. Set the Aperture to Auto.

8. Set the Count to 100.

9. Set the calibrator output to 0.00000 mV dc and allow the reading to settle.

10. Press the MENU key.

11. Under Measure, select Calculations.

12. Source positive and negative full-scale and half-scale voltages, as listed in the following table. Verify the 100 mV to 100 V range settings listed in the tables below. For each voltage setting, verify that the STATISTICS swipe screen reading for Average is within low and high limits.

The Fluke 5720A or 5730A calibrator 1000 V range 0.0 V setting is not verified.

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Calibration and Adjustment Manual

Full scale (+)

100

99.94

100.06

Half scale (+)

49.95

50.05

Half scale (–)

-50

-50.05

-49.95

Full scale (–)

-100

-100.06

-99.94

Full scale (+)

0.9996

1.0004

Half scale (–)

-0.5

-0.50025

-0.49975

Full scale (–)

-1

-1.0004

-0.9996

Full scale (+)

9.996

10.004

Half scale (+)

4.9975

5.0025

Half scale (–)

-5

-5.0025

-4.9975

Full scale (–)

-10

-10.004

-9.996

Full scale (+)

100

99.96

100.04

Half scale (+)

49.975

50.025

Half scale (–)

-50

-50.025

-49.975

Full scale (–)

-100

-100.04

-99.96

Full scale (+)

1000

999.6

1000.4

Half scale (+)

500

499.75

500.25

Half scale (–)

–500

-500.25

-499.75

Full scale (–)

–1000

-1000.4

-999.6

2: Performance verification DAQ6510 Data Acquisition and Multimeter System

Verify the digitize voltage 100 mV range

Description Nominal value Lower limit Upper limit

Verify the digitize voltage 1 V range

Description Nominal value Lower limit Upper limit

Half scale (+) 0.5 0.49975 0.50025

Verify the digitize voltage 10 V range

Description Nominal value Lower limit Upper limit

Verify the digitize voltage 100 V range

Description Nominal value Lower limit Upper limit

Verify the digitize voltage 1000 V range

Description Nominal value Lower limit Upper limit

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Performance verification

Data Acquisition and Multimeter System Calibration and Adjustment Manual Section 2:

Frequency verification

To verify frequency accuracy, you will:

• Apply accurate frequencies from the function generator to the terminals on the front panel of the

DAQ6510.

• Verify that the displayed readings are within specified limits.

Use the values in the table following the steps below to verify the performance of the DAQ6510. Actual values depend on the published specifications (see Example reading limit calculation 2-4)).

1. Connect the Keithley Instruments Model 3390 function generator to the DAQ6510 INPUT HI and LO terminals as shown in the following figure.

Figure 5: Connections for frequency verification and adjustment

(on page

2. On the DAQ6510, press the FUNCTION key, select the Measure Functions tab, and select Frequency.

3. Select the MENU key.

4. Under Measure, select Settings.

5. Set the Aperture to 250 ms.

6. Set the Threshold Range to 10 V.

7. Press the HOME key.

8. Source the voltage and frequency values as listed in Verify the frequency (on page 2-18

). For

each setting, be sure that the reading is within low and high limits.

DAQ6510-905-01 Rev. D June 2022 2-17

Section

Calibration and Adjustment Manual

10 Hz at 10 V

9.997

10.003

10 kHz at 5 V

9.9991

10.0009

100 kHz at 5 V

100

99.991

100.009

300 kHz at 5 V

300

299.973

300.027

2: Performance verification DAQ6510 Data Acquisition and Multimeter System

Verify the frequency

Use the following values to verify the performance of the DAQ6510. Actual values depend on published specifications (see Example reading limit calculation (on page 2-4)).

Description Frequency (Hz) Lower limit (Hz) Upper limit (Hz)

1 kHz at 5 V 1 0.9999 1.0001

Simulated thermocouple type J temperature verification

To verify thermocouple accuracy, you will:

• Apply accurate voltages from the calibrator to the terminals on the front panel of the DAQ6510.

• Verify that the displayed readings are within specified limits.

Thermocouple accuracy is verified by using a dc voltage calibrator to output values from standard thermocouple tables available from the National Institute of Standards and Technology (NIST) or other sources.

In the table following the steps below, three representative values are listed from a type J thermocouple table for temperatures –190 °C, 0 °C, and 750 °C, with their respective thermocouple voltages listed in the “Uncompensated calibrator source value” column. The calibrator source values are based on NIST Monograph 175, reference data 60, version 2.0.

Verify thermocouple accuracy

Because the cable connecting the calibrator to the DAQ6510 can have non-trivial thermal offset voltages, you must first correct for these to verify the DAQ6510 specifications.

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DAQ6510

cation

Data Acquisition and Multimeter System Calibration and Adjustment Manual Section 2: Performance verifi

To verify the simulated thermocouple type J temperature:

1. Connect the DAQ6510 HI and LO INPUT terminals to the calibrator HI and LO terminals as shown in the following figure.

Figure 6: Connections for thermocouple verification

2. On the DAQ6510, press the FUNCTION key and select DC voltage.

3. Press the MENU key.

4. Under Measure, select Settings.

5. Set the range to 100 mV.

6. Set Input Impedance to Auto.

7. Set autozero to On.

8. Select Integration Rate. The Integration Rate dialog box opens.

9. Set the unit to NPLC.

10. Set NPLC to 1 PLC.

11. Select OK and press the HOME key to return to the Home Screen.

12. Set the calibrator to output 0 V and enable the output.

13. Allow five minutes for settling of the thermal voltage.

14. Record the measured offset voltage to 1 µV precision. If necessary, use the DAQ6510 filter settings to reduce the noise of this measurement (for filter settings, go to MENU > Measure Calculations).

15. Press the DAQ6510 FUNCTION key and select Temperature.

16. Press the MENU key.

17. Under Measure, select Settings.

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Section

Calibration and Adjustment Manual

–190 °C

–7.659 mV

–190.2 °C

–189.8 °C

0 °C

0.000 mV

–0.2 °C

0.2 °C

750 °C

42.281 mV

749.8 °C

750.2 °C

2: Performance verification DAQ6510 Data Acquisition and Multimeter System

18. On the Measure Settings screen, set the following values:

 Units: °C

 Transducer: TC

 Thermocouple: J

 Temperature (simulated reference temperature): 0 °C

 Integration Rate: 1 PLC

 Auto Zero: On

19. Set the calibrator to the simulated thermocouple voltage you want (from the following table), first correcting for the offset voltage measured in step 14. For example, if the measured offset voltage was –2 µV, set the calibrator to –7.659 mV – (–0.002 mV), which equals –7.657 mV, to simulate – 190 °C.

20. Verify that the DAQ6510 reading is within lower and upper limits.

21. Repeat steps 18 and 19 for each value in the following table.

Use the following values to verify the performance of the DAQ6510. Actual values depend on published specifications (see Example reading limit calculation (on page 2-4

)).

Simulated temperature

Uncompensated calibrator source value (V)

Lower limit Upper limit

Simulated RTD temperature verification

Use the following information to verify the performance of the DAQ6510. Actual calibrator source values will vary. RTD verification is based on the calibrator sourcing resistance and the DAQ6510 conversion of the resistance measurement to calculated temperature based on the Callendar-Van Dusen equation.

To verify RTD temperature accuracy, you will:

• Apply accurate resistance from the calibrator to the terminals on the front panel of the DAQ6510.

• Verify that the displayed readings are within specified limits.

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Data Acquisition and Multimeter System Calibration and Adjustment Manual Section 2:

RTD equations

The temperature versus resistance readings listed in the RTD reference tables are calculated using the Callendar-Van Dusen equation. There are two equations that are based on different temperature ranges. There is an equation for the –200 °C to 0 °C range and one for the 0 °C to 850 °C range.

Equation for –200 °C to 0 °C temperature range

= R0 [1 + AT + BT2 + CT3(T – 100)]

RTD

where:

• R

is the calculated resistance of the RTD

RTD

is the known RTD resistance at 0 °C

• T is the temperature in °C

• A = alpha [1 + (delta/100)]

• B = –1 (alpha)(delta)(1E-4)

• C = –1 (alpha)(beta)(1E-8)

The alpha, beta, and delta values are listed in the following table.

Equation for 0 °C to 850 °C temperature range

= R0 (1 + AT + BT2)

RTD

where:

• R

is the calculated resistance of the RTD

RTD

is the known RTD resistance at 0 °C

• T is the temperature in °C

• A = alpha [1 + (delta/100)]

• B = –1 (alpha)(delta)(1E-4)

The alpha and delta values are listed in the following table.

DAQ6510-905-01 Rev. D June 2022 2-21

+ 74 hidden pages

Tektronix DAQ6510 Service

Specifications and Main Features

Frequently Asked Questions

User Manual

Safety precautions

Table of contents

Welcome

Introduction

Introduction to this manual

Extended warranty

Contact information

Introduction

Performance verification

Verification test requirements

Environmental conditions

Warmup period

Line power

Recommended test equipment

Calibration verification limits

Example reading limit calculation

Calculating resistance reading limits

Performing the verification test procedures

Test summary

Test considerations

Front-panel calibration verification

DC voltage verification

Verify dc voltage accuracy for the 100 mV to 1000 V ranges

Verify the dc voltage 100 mV range

Verify the dc voltage 1 V range

Verify the dc voltage 10 V range

Verify the dc voltage 100 V range

Verify the dc voltage 1000 V range

AC voltage verification

Verify ac voltage accuracy for the 100 mV to 100 V ranges

Verify the ac voltage 100 mV range

Verify the ac voltage 1 V range

Verify the ac voltage 10 V range

Verify the ac voltage 100 V range

Verify ac voltage accuracy for the 750 V range

Verify the ac voltage 750 V range

Digitize dc voltage verification

Verify the digitize voltage 100 mV to 1000 V ranges

Verify the digitize voltage 100 mV range

Verify the digitize voltage 1 V range

Verify the digitize voltage 10 V range

Verify the digitize voltage 100 V range

Verify the digitize voltage 1000 V range

Frequency verification

Verify the frequency

Simulated thermocouple type J temperature verification

Verify thermocouple accuracy

Simulated RTD temperature verification

RTD equations