PSH32-TC6 Shielded Cable with Thermocouple Miniconnectors
Contents
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3. e PSH32 TC6 SHIELDED CABLE WITH THERMOCOUPLE MINICONNECTORS NSTALLATION GUIDE This installation guide describes how to install and connect thermocouples and digital I O signals to the PSH32 TC6 shielded cable with thermocouple miniconnectors for use with the NI PCMCIA 4350 Introduction The PSH32 TC6 shielded cable with thermocouple miniconnectors consists of a pod with six miniconnectors that connect the thermocouples to the NI PCMCIA 4350 This pod connects to the NI PCMCIA 4350 input output I O connector with a shielded cable You also can access the four digital I O DIO lines and digital ground of the NI PCMCIA 4350 using the detachable screw terminal connector located on the pod This cable is designed specifically for ease of use with thermocouples The cable features isothermal construction to minimize the temperature gradients across the thermocouple junctions and a high accuracy thermistor cold junction temperature sensor The pod provides connections to all NI PCMCIA 4350 DIO lines and to all but two analog input channels CH CHO is dedicated to the cold junction sensor and CH1 is dedicated to auto zeroing circuitry Refer to the NI 435X User Manual for further details about these two channels National Instruments NI ni com and NI DAQ are trademarks of National Instruments Corporation Product and September 2002 company names mentioned herein are trademarks or trade names of their respective compani
4. es For patents covering 321637C 01 National Instruments products refer to the appropriate location Help Patents in your software the patents txt file on your CD orni com patents N NATIONAL 1997 2002 National Instruments Corp All rights reserved INSTRUMENTS Conventions 3 A italic monospace NI 435X The following conventions are used in this guide The symbol leads you through nested menu items and dialog box options to a final action The sequence File Page Setup Options directs you to pull down the File menu select the Page Setup item and select Options from the last dialog box This icon denotes a note which alerts you to important information This icon denotes a caution which advises you of precautions to take to avoid injury data loss or a system crash When this symbol is marked on the product refer to the Read Me First Safety and Radio Frequency Interference document shipped with the product for precautions to take Italic text denotes variables emphasis a cross reference or an introduction to a key concept This font also denotes text that is a placeholder for a word or value that you must supply Text in this font denotes text or characters that you should enter from the keyboard sections of code programming examples and syntax examples This font is also used for the proper names of disk drives paths directories programs subprograms subroutines device names functions ope
5. gal 210 311 210 Russia 095 238 7139 Singapore 65 6 226 5886 Slovenia 3 425 4200 South Africa 11 805 8197 Spain 91 640 0085 Sweden 08 587 895 00 Switzerland 056 200 51 51 Taiwan 02 2528 7227 United Kingdom 01635 523545 National Instruments Corporation 7 PSH32 TC6 Shielded Cable Installation Guide
6. ignals to the PSH32 TC6 1 Use a wire cutter and wire insulation stripper to strip the wire ends as necessary to connect them to the screw terminals 2 Loosen the screws in the screw terminals with the 1 8 in flathead screwdriver 3 Insert the stripped wires into the screw terminals Tighten the screws with the 1 8 in flathead screwdriver The wires should be firmly connected National Instruments Corporation 3 PSH32 TC6 Shielded Cable Installation Guide 1 Ejector Ears 4 Screw Terminal Receptacle 7 Miniconnector Receptacles 2 NI PCMCIA 4350 Connector 5 Thermocouple Pod 8 Miniconnector 3 Screw Terminals for DIO 6 Label 9 Thermocouple Figure 1 PSH32 TC6 Parts Locator Diagram Connecting to the PSH32 TC6 to the NI PCMCIA 4350 Attach the connector end of the PSH32 TC6 cable to the NI PCMCIA 4350 I O connector as shown in Figure 2 The two connectors should snap together To disconnect the cable from the NI PCMCIA 4350 press inward on the two ejector ears on the cable backshell and gently pull on the backshell The cable should pop out Do not pull the cable You can use the adhesive hook and loop fastener to attach the thermocouple receptacle end of the cable to any flat surface Sy Note To minimize the temperature gradient inside the thermocouple pod and maintain its isothermal nature for accurate cold junction compensation place the PSH32 TC6 away from extreme temperature differentials PSH32
7. rations variables filenames and extensions and code excerpts Refers to all devices in the National Instruments 4350 and 4351 families What You Need to Get Started You need the following items to set up and use the PSH32 TC6 Q PSH32 TC6 shielded cable with thermocouple miniconnectors Q PSH32 TC6 Shielded Cable with Thermocouple Miniconnectors Installation Guide NI PCMCIA 4350 and documentation Read Me First Safety and Radio Frequency Interference Thermocouple with a miniconnector 1 8 in flathead screwdriver DOODO Wire cutter PSH32 TC6 Shielded Cable Installation Guide 2 ni com Q Wire insulation stripper LY Adhesive hook and loop fastener strip Connecting the Signals Refer to the NI 435X User Manual for signal connection examples Connecting Thermocouples UN Caution Refer to the Read Me First Safety and Radio Frequency Interference document before removing equipment covers or connecting disconnecting any signal wires Insert the thermocouple miniconnector to the mating miniconnector on the thermocouple pod as shown in Figure 1 Each miniconnector is keyed that is it has two spades of different widths so that you can insert the thermocouple in only one way Do not force the miniconnector if you encounter difficulty while inserting the miniconnector check whether the polarity is correct Connecting DIO Signals Refer to Figure as you complete the following steps to connect the digital s
8. resistance of the thermistor in ohms TCC 99 2 5 3 T F where 7 F and 7 C are the temperature readings in degrees Fahrenheit and degrees Celsius respectively B Note When you have configured the NI 435X device with the correct accessory in Measurement amp Automation Explorer MAX NI DAQ can automatically perform cold junction compensation on measurements taken on thermocouple channels Specifications Cold junction sensor accuracy 0 06 C from 15 to 35 C 0 2 C from 0 to 15 C and 35 to 55 C Maximum working voltage signal plus common mode 06 Each input should remain within 42 V of ground 1 Includes only the thermistor accuracy The combined effects of the temperature sensor accuracy as well as the current source accuracy due to tolerances in all components in the NI PCMCIA 4350 the effects caused by temperature and loading and self heating and current leakage are discussed in the NJ 435X User Manual 2 Refer to the NI PCMCIA 4350 maximum working voltage specification in Appendix A Specifications of the NI 435X User Manual use the lower number of the two PSH32 TC6 Shielded Cable Installation Guide 6 ni com Technical Support Resources NI Web Support NI Web support is your first stop for help in solving installation configuration and application problems and questions Online problem solving and diagnostic resources include frequently asked questions
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