HP FET MULTIPLEXER E1351A/53A manual Using the HP E1351A/53A FET Multiplexer Modules Chapter

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Comments Measuring Temperature with the HP El326B/El411B Multimeters. The HP E1326B/E1411B Multimeters can directly measure channels of single or multiple multiplexer modules. The multimeter automatically calculates the correct temperature for the specific thermistor or thermocouple type used. For more information, see the HP E1326B/E1411B Multimeter User’s Manual.

Thermocouple Compensated Measurements. The HP E1353A FET Multiplexer makes thermocouple compensated measurements. Thermocouple compensation accounts for the temperature inside the multiplexer terminal module, which can affect the thermocouple reading. Thermocouple compensated measurements are made with the HP E1326B/E1411B. More information on these types of measurements can be found in Hewlett-Packard Application Note 290, Practical Temperature Measurements.

High-Speed Temperature Measurements. High-speed temperature measurements can be made by measuring the thermocouple voltage, compensating the reading, and then converting the voltage to a temperature. The instrument configuration used for these types of measurements may include an E1326B/E1411B Multimeter and a FET multiplexer switchbox, or an external voltmeter used with the FET switchbox. The procedure for these types of measurements is:

1.Measure the resistance of the thermistor (channel 93) on the multiplexer terminal module (CLOSe(@cc93)).

2.Measure the thermocouple voltage on the multiplexer channel.

3.Convert the thermistor resistance to a temperature using the following equation:

t = 1.0 / (A + B * lnr + C * (lnr)3)calculate temperature

t = t - 273.15

convert Kelvin to Centigrade

where:

A = 0.00128463

B = 0.00023625

C = 9.2697E-8

lnr = natural log of the measured thermistor resistance

A, B, and C are the curve-fitting constants for the multiplexer’s 5K thermistor.

4.Convert the thermistor temperature (step 3) to a voltage using the reference table for the type of thermocouple used.

5.Subtract the voltage (step 4) from the thermocouple voltage measured in step 2. Convert the difference between the voltages to a temperature, again using the reference table for the type of thermocouple used.

6.Add the temperature (step 5) to the thermistor temperature computed in step 3 to obtain the result of the thermocouple measurement.

44 Using the HP E1351A/53A FET Multiplexer Modules

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Contents Contents Understanding the HP E1351A/53A FET Multiplexer Modules Appendix C.HP E1351A/53A FET Multiplexer Error Messages HP E1351A/53A FET Multiplexer User’s Manual Contents Certification Documentation History July 20 According to ISO/IEC Guide 22 and ENPage Business Reply Mail Page Using This Chapter FET Multiplexer Module DescriptionAnalog Bus Connector Multimeter Connection PointsFET Multiplexer Module Block Diagram Switchbox and Scanning Voltmeter Configurations Output 70903OUTP onDigital Bus and Triggering Programming Language Initial OperationConfiguring the HP E1351A/53A FET Multiplexer Modules Card Numbers for Single-Module Switchboxes Multiplexer Card NumbersSetting the Address Switch Card Numbers for Scanning VoltmeterSetting the Interrupt Line Number Selecting the Interrupt Line NumberSetting the Card ID Switch Card ID SwitchConnecting User Inputs Channel FET Multiplexer Connector Pin-outAdding Signal Conditioning Components/Current Shunts Signal Conditioning Components/Current ShuntsConnecting Field Wiring Wiring GuidelinesWiring a Terminal Module Connecting Multimeters and Signal Generators 10. Analog Bus and Digital Bus ConnectionsAnalog Bus and Digital Bus Cables 11. Analog Bus and Digital Bus CablesPage Using the HP E1351A/53A FET Multiplexer Modules Selecting ChannelsUsing the HP E1351A/53A FET Multiplexer Modules Chapter Multiplexer Commands Matrix Commands Used in ChapterConnecting Switchbox Channels to Direct Terminals Scanport NoneCLOS? Closing Channels 02 and 09 for a Voltage Measurement Connecting Channels 02 and 10 for 4-Wire Ohms Measurement Scanning a Range of Switchbox Channels Example Making Voltage Measurements By ScanningScanning Channels 100 to 215 of a Two-Module Switchbox Example Making 2-Wire Ohms Measurements by Scanning Example Making 4-Wire Ohms Measurements by ScanningDownloading a Scan List Scanning a Switchbox without a Downloaded Scan List Output 70904INITScanning a Switchbox with a Downloaded Scan List Output 70904STATOPERENABScanning Voltmeter Configuration with HP E1326B Connecting the Analog Bus and Digital Bus CablesTemperature Measurement Using a Thermocouple Using the HP E1351A/53A FET Multiplexer Modules Chapter Scanning with External Instruments Commands for Scanning Switchbox ChannelsUsing Scanning Trigger Sources Scanning Commands Trigger Sources Example Scanning With External Instruments Example Scanning Using Trig Out Event In Ports Output 70914OUTP onOutput 722TRIG Extdcvmem Fifo SCANMODE, Scanport and TRIGgerSOURce Dbus Using the Scan Complete Bit Example Scan Complete MonitorScpi Command Format Command TypesCommon Command Format ROUTeSCANMODE Volt Scpi Command Reference Example Stopping a Scan with ABORt ABORtSubsystem Syntax COUNt ParametersComments Example Query Number of Scanning CyclesMONitorCARD Example Select Module #2 in a Switchbox for MonitoringDISPlay Example Enabling the Monitor Mode ModeINITiate CONTinuousExample Enabling Continuous Scans Example Query Continuous Scanning StateOUTPut STATe∙ Downloaded Scans The OUTPut subsystem does not work with Example Enabling Trig Out PortROUTe ∙ Closing Channels To close∙ Query is Software Readback The ROUTeCLOSe? command Example Closing Multiplexer ChannelsExample Query Multiplexer Channel Closure ∙ Opening Channels To open∙ Query is Software Readback The ROUTeOPEN? command ExampleOpening Multiplexer Channels Query Multiplexer Channel Open StateExample Scanning Using External Instruments ∙ Scanning Operation With a valid channel listExample Query Scan Mode Example Selecting the Abus Port Example Query Scan PortExample Setting 16 μsec SETTling Time Example Set and Query the SETTling TimeSTATus OPERationENABleExample Enable the Status Register Bit SYSTem CDEScription?∙ 16-Channel FET Multiplexer Module Description Example Reading the Description of Card #1 ModuleComments ∙ 16-Channel FET Multiplexer Module Model Number Example Reading the Model Number of a Card #1 Module∙ Executing the TRIGgerIMMediate Command a channel list Example Advancing Scan using the TRIGger CommandTRIGger IMMediate∙ Enabling the Trigger Source The TRIGgerSOURce command ∙ Trig Out Port Shared by Switchboxes See the OUTPut commandExample Query Trigger Source Example Scanning Using External TriggersScanning Using Bus Triggers Ieee 488.2 Common Commands ANSI/IEEE StandardCommand Quick Reference Scpi Commands Quick Reference DescriptionPage Maximum Voltage Screw Terminal Wire Size Watts/Slot Connectors Used P1 Maximum Offset Voltage Number of SlotsInput Impedance Power Requirements Power Off High to LowHP E1351A/53A FET Multiplexer Specifications Appendix a About This Appendix Register AddressingHP E1351A/53A Register-Based Programming Appendix B A16 Address Space Outside Command Module Or Mainframe A16 Address Space Inside Command Module Or MainframeRegister Descriptions Device Type Register Manufacturer ID Register Register Bit DescriptionsRegister module Enable IRQ EN Status/Control RegisterScan Control Register Scan Channel Delay RegisterContinuous Enable CNT EN Reset Pointer RST PTR Scan Channel Configuration Register Direct Channel Configuration RegisterA Tree Isolation Switch Disable A-D Valid Channel VLD C1 C0Executing Commands Direct Control RegisterROUTe ROUTeCLOSe channellist is equivalent to the following HP E1351A/53A Register-Based Programming Appendix B Register-Based Programming for Maximum Speed Decimal code Appendix B HP E1351A/53A Register-Based Programming Multimeter Command Parameter Opcodes Table B-1. Multimeter Command and Parameter OpcodesFigure B-3. Configuring the Multimeter Multimeter Register-Based Programming Error Codes Error Code CauseHP E1351A/53A FET Multiplexer Error Messages HP E1351A/53A FET Multiplexer Error Messages Appendix C Index LaddrHP E1351A/53A FET Multiplexer User’s Manual Index HP-IB HP E1351A/53A FET Multiplexer User’s Manual Index HP E1351A/53A FET Multiplexer User’s Manual Index HP E1351A/53A FET Multiplexer User’s Manual Index HP E1351A/53A FET Multiplexer User’s Manual Index
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