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National Instruments NI 9251, Calibration Procedure, Page: 2 / 8

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NI cDAQ-9174/9178 USB Chassis Quick Start

NI-DAQmx installation and hardware setup

NI 9251 with mini XLR Getting Started Guide

NI 9251 with mini XLR connection information

NI 9251 with mini XLR Datasheet

NI 9251 with mini XLR circuitry and specifications

NI-DAQmx Readme

Operating system and application software support in NI-DAQmx

LabVIEW Help

LabVIEW programming concepts and reference information about NI-DAQmx VIs
and functions

NI-DAQmx C Reference Help

Reference information for NI-DAQmx C functions and NI-DAQmx C properties

NI-DAQmx .NET Help Support for Visual Studio

Reference information for NI-DAQmx .NET methods and NI-DAQmx .NET
properties, key concepts, and a C enum to .NET enum mapping table

Test Equipment

The following table lists the equipment recommended for the performance verification and
adjustment procedures. If the recommended equipment is not available, select a substitute
using the requirements listed.

Table 1. Recommended Equipment

Equipment

Recommended Model

Requirements

 

 

 

Calibrator

Fluke 5502A, Fluke 5522A,
Fluke 5530A

Use a high-precision voltage
source with gain error of
<100 ppm and offset error
<0.1 mV.

BNC (F) to Banana
Adapter

Pomona Electronics 1269

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NI 9251 Calibration Procedure

Summary of Contents for NI 9251

Page 1: ...e 6 Reverification 6 Accuracy under Calibration Conditions 6 Worldwide Support and Services 7 Software Calibrating the NI 9251 with mini XLR requires the installation of NI DAQmx 16 1 or later on the calibration system You can download NI DAQmx from ni com downloads NI DAQmx supports LabVIEW LabWindows CVI ANSI C and NET When you install NI DAQmx you only need to install support for the applicatio...

Page 2: ...nd NI DAQmx C properties NI DAQmx NET Help Support for Visual Studio Reference information for NI DAQmx NET methods and NI DAQmx NET properties key concepts and a C enum to NET enum mapping table Test Equipment The following table lists the equipment recommended for the performance verification and adjustment procedures If the recommended equipment is not available select a substitute using the re...

Page 3: ...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 C 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 device measurement circuitry is at a stable operating temperature Initial Setup...

Page 4: ...mine the As Found status of the NI 9251 with mini XLR 1 Set the calibrator to Standby mode STBY 2 Connect the NI 9251 with mini XLR to the calibrator as shown in the following figure Figure 1 Analog Input Verification Connections NI 9251 Calibrator AI0 AI0 Chassis GND HI LO AI1 AI1 Note The chassis ground lug connection to ground is the NI 9251 with mini XLR ground connection 3 Set the calibrator ...

Page 5: ...Disconnect the calibrator from the device Table 4 NI 9251 with mini XLR Verification Test Limits Test Point 2 Year Limits Location Value V Lower Limit VDC Upper Limit VDC Minimum 1 9 1 905161 1 894839 Mid scale 0 0 002885 0 002885 Maximum 1 9 1 894839 1 905161 Note The test limits listed in the NI 9251 with mini XLR Verification Test Limits table are derived using values from the NI 9251 with mini...

Page 6: ...point in the array i Close the calibration session 4 Disconnect the NI 9251 with mini XLR from the calibrator EEPROM Update When an adjustment procedure is completed the NI 9251 with mini XLR 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 by ...

Page 7: ...t Product registration facilitates technical support and ensures that you receive important information updates from NI A Declaration of Conformity DoC is our claim of compliance with the Council of the European Communities using the manufacturer s declaration of conformity This system affords the user protection for electromagnetic compatibility EMC and product safety You can obtain the DoC for y...

Page 8: ...ments 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...

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