NI 9234 User Manual

CALIBRATION PROCEDURE
NI 9234
4-Channel, ±5 V, 24-Bit Software-Selectable
IEPE and AC/DC Analog Input Module
This document contains the verification and adjustment procedures for the National
Instruments 9234. For more information on calibration, visit
ni.com/calibration.
Contents
Software.................................................................................................................................... 1
Documentation.......................................................................................................................... 2
Test Equipment......................................................................................................................... 3
Test Conditions......................................................................................................................... 4
Initial Setup............................................................................................................................... 4
Verification............................................................................................................................... 5
Accuracy Verification....................................................................................................... 5
Gain Matching Verification.............................................................................................. 6
Phase Matching Verification ............................................................................................ 8
Common-Mode Rejection Ratio Verification .................................................................. 9
IEPE Current Verification ................................................................................................ 11
IEPE Compliance Voltage Verification ........................................................................... 12
Adjustment................................................................................................................................ 14
Accuracy Adjustment ....................................................................................................... 14
EEPROM Update ..................................................................................................................... 14
Reverification ........................................................................................................................... 15
Accuracy Under Calibration Conditions .................................................................................. 15
Worldwide Support and Services ............................................................................................. 16
Software
Calibrating the NI 9234 requires the installation of NI-DAQmx 9.2 or later on the calibration
system. You can download NI-DAQmx from ni.com/downloads. NI-DAQmx supports
LabVIEW, LabWindows
TM
/CVI, C/C++, C#, and Visual Basic .NET. When you install
NI-DAQmx you only need to install support for the ADE that you intend to use.

NI 9234 Specifications

General

Number of Channels	4
Simultaneous Sampling	Yes
Maximum Sample Rate	51.2 kS/s per channel
Resolution	24 bits
Input Range	±5 V
Operating Temperature Range	-40 °C to 70 °C
Signal Conditioning	IEPE
Isolation	Channel-to-earth ground