NI SCXI-MS100 User manual

LabVIEW™, National Instruments™, ni.com™, NI-VISA™, SCXI™, and VirtualBench™are trademarks of National Instruments Corporation. Product and
company names are trademarks or trade names of their respective companies.
371211A-01©Copyright 1996, 2000 National Instruments Corp.All rights reserved.January 2000
INSTALLATION GUIDE
SCXI -MS100 TEMPERATURE
MEASUREMENT SYSTEM
This guide describes how to install, configure, and use the SCXI-MS100
temperature measurement system.
Introduction
The SCXI-MS100 is a complete virtual-instrument-based temperature and
voltage measurement system for Windows 2000/NT/98/95. The system
includes the software and hardware needed to acquire and log up to
32 channels of data without any programming. You can configure each
channel for thermocouple or voltage input, and add additional SCXI
modules to expand the number of channels to 128.
The SCXI-MS100 is ideal for multichannel temperature applications in
manyenvironments, suchas process monitoring,industrialautomation,and
instrumentation. The SCXI-MS100 combines SCXI and data acquisition
(DAQ) products to take accurate temperature measurements with
thermocouples. Taking measurements with thermocouples requires
amplification, cold-junction compensation (CJC), and high-resolution
analog-to-digital converters (ADCs). In addition, the included
VirtualBench-Logger software is an interface you use to display and
log data.
What You Need to Get Started
To set up and use your SCXI-MS100 temperature measurement system,
you need the following:
❑DAQ Quick Start Guide
❑SCXI Quick Start Guide
❑AT-MIO-16XE-50 or PCI-6035E data acquisition (DAQ) device
™

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❑SCXI-1000 chassis with AC power cord
❑SCXI-1102 module
❑SCXI-1303 terminal block
❑SCXI-1349 cable assembly (cable and cable adapter)
❑NI-DAQ driver software on CD-ROM, version 6.5.1 or later
❑VirtualBench application software on CD-ROM, version 2.51 or later
❑Flathead screwdriver
❑Number 1 Phillips-head screwdriver
Install the Software and Hardware
The following sections detail how to install your software and hardware in
your SCXI-MS100 system.
Note Install your software before you install your hardware.
Install the DAQ Device
To install the NI-DAQ driver software and the plug-in DAQ device,
carefully follow the steps in the DAQ Quick Start Guide until the step that
explains how to confirm that your DAQ device is operating properly. You
do not need to go further since you will use VirtualBench-Logger to test
your system.
Install VirtualBench-Logger
To install the VirtualBench-Logger, perform the following steps:
1. Insert the VirtualBench CD into your CD-ROM drive.
2. Click Install VirtualBench from the installation window that appears
on your computer screen.
3. When prompted to select your VirtualBench components, select
Datalogger.
4. The next screen to appear is entitled Select Device Drivers. Uncheck
NI-DAQ, since the NI-DAQ driver was installed with your DAQ
device. Leave VISA checked, unless NI-VISA (or a newer version of
NI-VISA) was installed by another National Instruments software
product such as LabVIEW.
5. Follow the installer prompts through the rest of the installation.

©National Instruments Corporation 3 SCXI-MS100 Temperature Measurement System
Install the SCXI Hardware Components
To install the SCXI hardware components, carefully follow the steps
shown in the SCXI Quick Start Guide. This procedure includes instructions
on how to set up your SCXI chassis, install SCXI modules, attach terminal
blocks and cables, configure your SCXI chassis using Measurement &
Automation Explorer, and test to determine that your chassis is configured
properly.
Caution Do not insert an SCXI module into a chassis that is powered on.
Connect the Thermocouples
To connect thermocouple lead wires to the SCXI-1303 terminal block,
refer to Figures 1 and 2 as necessary while you perform the following
steps:
1. Unscrew the top cover screws and remove the cover.
2. Loosen the strain-relief screws and remove the strain-relief bar.
Figure 1. SCXI-1303 Parts Locator Diagram
1 Strain-Relief Bar
2 Strain-Relief Screws 3 Earth Ground Solder Lug 4 Mating Connector 5 Thumbscrew 6 Top Cover Screws 7 Top Cover
2
7
3
6
4
5
1
Back View Front View

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3. Slide the thermocouple (included with your kit) through the
strain-relief opening. You can add insulation or padding if necessary.
4. To connect the wires to the SCXI-1303 screw terminals, insert the
wires into the terminals and tighten the screws with a flathead
screwdriver. Refer to Figure 2 to install the J-type thermocouple on
channel 0.
5. Tighten the screw terminal to a torque of 5-7 in.-lb.
6. Reinstall the strain-relief bar and tighten the strain-relief screws.
7. Reinstall the top cover and tighten the top-cover screws.
Figure 2. Thermocouple Connected to Channel 0 of the SCXI-1303 Terminal Block
You are ready to connect the SCXI-1303 terminal block to the SCXI-1102
module front connector.
1 – (red) Thermocouple
Terminal 2 + (white) Thermocouple
Terminal
3 Srain-Relief Screws
4 J-Type Thermocouple
1
2
3
4

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Connect the SCXI-1303 to Your SCXI-1102 Module
Toconnect the SCXI-1303 terminalblock to yourSCXI-1102 module front
connector, refer to Figure 3 and perform the following steps:
1. Turn off your SCXI-1000 chassis.
2. Connect the SCXI-1303 terminal block to the SCXI-1102 module
front connector.
3. Make sure that the SCXI-1102 module top and bottom thumbscrews
do not obstruct the rear panel of the SCXI-1303 terminal block.
4. Tighten the top and bottom thumbscrews on the back of the terminal
block to hold it securely in place and to ensure proper shielding.
5. Turn on the SCXI-1000 chassis power.
Figure 3. Connecting the SCXI-1303 Terminal Block to the SCXI-1102 Module
Note Place the SCXI chassis away from any extreme temperature differential to minimize
the temperature gradient inside the terminal block and maintain its isothermal nature for
accurate cold-junction compensation.
1 Terminal Block
Thumbscrew 2 Chassis 3 Module Thumbscrews
ON
8
1
2
3
4
5
6
7
12
9
10
11
ADDRESS BAUD
1
2
3

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Beforeyou continue, confirmthatyour system resemblesthe system shown
in Figure 4.
Figure 4. Complete Installation
Configure the System
To complete the configuration of your SCXI-MS100 system using
Measurement & Automation Explorer, perform the following steps:
1. Double-click the Measurement & Automation Explorer icon on
your desktop.
2. Click the +next to the Devices and Interfaces icon to display the list
of installed devices and interfaces.
3. Locate the SCXI-1000 chassis in the list. If the chassis is not listed,
return to the Install the SCXI Hardware Components section.
4. Click the +next to the Chassis icon to display the SCXI-1102 module
in the chassis.
5. Right-click the SCXI-1102 module and select Properties.
1 Thermocouple
2 SCXI-1303 Terminal Block 3 SCXI-1102 Module 4 SCXI-1000 Chassis 5 SCXI-1349 Cable Assembly 6 DAQ Device 7 Personal Computer
ON
8
1
2
3
4
5
6
7
12
9
10
11
ADDRESS BAUD
1
2345
6
7

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6. Click the General tab shown in Figure 5 and the Channel tab shown
in Figure 6. All items on both the General and Channel tabs should
have defaulted to the correct settings. If the default settings are
incorrect or incomplete, change them as needed as shown in
Figure 5 and 6.
Figure 5. SCXI Module General Tab
Figure 6. SCXI Module Channel Tab

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7. Click the Accessory tab shown in Figure 7. Set the Accessory option
to SCXI-1303 and click OK.
Figure 7. SCXI Module Accessory Tab
You can exit Measurement & Automation Explorer before using
VirtualBench-Logger.

©National Instruments Corporation 9 SCXI-MS100 Temperature Measurement System
Configure VirtualBench-Logger
From Windows, run the VirtualBench-Logger software, located under
Start»Programs»National Instruments VirtualBench»
VirtualBench-Logger. Figure 8 shows the main run-time window for the
VirtualBench-Logger.
Figure 8. VirtualBench-Logger Main Run-Time Window
To configure the settings in the VirtualBench-Logger, select Edit»Settings.

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Figure 9 shows the Logger Settings window.
Figure 9. VirtualBench-Logger Settings Window
To configure VirtualBench-Logger for use with an installed thermocouple,
complete the following steps:
1. In the Hardware box, set the Device to 1: AT-MIO-16XE-50 or
1: PCI-6035E.
2. Set the Module to 1: SCXI-1102.
3. In the Channels box, set the End Channel to 0 - Md1 Ch0.
4. Set the Transducer type to Thermocouple.
5. Set the Max input range to 1.000E+2.
6. Set the Min input range to 0.000E+0.
7. Set the Temp Units type to deg C.
8. Set the TC Type to J.
9. Click the Configure CJC button.