Index

Index

Thermocouple Check feature, 107, 221 thermocouples

calculation error, 353 color codes, 351 conversion accuracy, 345 connections, 21 diffusion error, 352 external reference, 107 fixed reference, 107 internal reference, 107 isothermal block, 107 measurement tutorial, 347 measurement units, 106 probe accuracy, 351 reference junction, 107 reference junction error, 352 shielding, 353

shunt impedance, 353 temperature range, 351 Thermocouple Check, 107, 221 types supported, 21, 106, 351

thermoelectric voltages, 340 threshold, totalize, 135, 136, 137 time (clock)

factory setting, 145 setting the, 22, 145

time stamp absolute, 87 relative, 87

timeout, low frequency, 118 torroid, 339

totalize threshold, 135 hardware jumper, 395

TOT:CLEar:IMMediate command, 257 TOT:DATA? command, 257 TOT:SLOPe command, 257 TOT:TYPE command, 256, 257

totalizer

ac vs. TTL threshold, 135 adding to scan list, 44, 136 block diagram, 395 clearing the count, 136 contact bounce, 396 counting on falling edge, 135 counting on rising edge, 135 errors, 396

gate signal, 135, 396 manually reset, 44 maximum count, 136, 395 overflow, 280

reading count, 44 reset mode, 44, 76, 136

reset mode while scanning, 76 scanning, 76

Totalize Threshold jumper, 135 track mode, alarm output lines, 128 transducer types, 56

tree switch, 383

triangle brackets (< >), syntax, 73, 181 TRIG:SOUR command, 81 TRIG:TIMer command, 81 TRIGGER command, 82 TRIGger:COUNt command, 86, 229, 241 TRIGger:SOUR command, 228, 240 TRIGger:TIMer command, 229, 241 triggering

buffering, 83 external, 83 scan, 80

troubleshooting

error messages, 303-318 RS-232, 273

true RMS, 360

TTL drive, digital output, 393 tutorial, 333

twisted pair cables, 55 two-wire multiplexers, 58, 378 two-wire ohms, 369

U

UNIT:TEMP command, 106, 219 units

temperature, 106, 219 with readings, 87

unsecure calibration, 156 Utility key, 36

V

varistor, 386

vertical bar (), syntax, 73, 181 VIEW annunciator, 4

View key, 24, 36, 91, 126 viewing

alarm data, 126 readings, 90 scanned readings, 24

Visual Basic, example, 321 VM Complete signal, 95 VOLT:AC:BANDwidth command, 223 voltage (DAC) output

card reset, 139

current limitations, 139, 397 differential errors, 398 integral errors, 398 resetting, 45

simplified schematic, 397 writing, 45

voltage dividers, 385 voltage measurements, 113

ac low frequency filter, 114 ac settling time, 114

VSWR, 391, 411

432

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34970A specifications

Agilent Technologies 34970A is a versatile data acquisition and measurement system that has gained popularity in various industries, including research and development, manufacturing, and education. The primary purpose of the 34970A is to offer an efficient solution for data collection, monitoring, and analysis, which can significantly enhance productivity and accuracy in testing applications.

One of the main features of the 34970A is its modular design, allowing users to customize the system according to their specific measurement needs. The mainframe can accommodate up to three plug-in measurement modules, which can include various types of measurements such as analog, digital, temperature, and frequency. This modularity provides flexibility for users to tailor the system to their requirements, making it highly adaptable to different applications.

Another notable characteristic of the Agilent 34970A is its impressive channel configuration. The system can support up to 120 measurement channels when fully configured, enabling extensive data acquisition without the need for multiple devices. This capability is essential for applications requiring simultaneous monitoring of multiple parameters or locations.

The 34970A utilizes advanced signal processing technologies to ensure high-accuracy measurements. The internal 6.5-digit resolution multimeter provides precise readings, while the device also supports various input types, such as thermocouples and RTDs for temperature measurements. The ability to perform mathematical functions, such as summation and averaging, on the acquired data further enhances its usability.

For data storage and management, the Agilent 34970A features built-in memory for storing up to 20,000 readings. Users can also easily transfer data to a PC through the RS-232 interface or GPIB (IEEE 488) for further analysis and reporting. Additionally, it offers the capability to program automatic data logging and scheduling of measurements, which streamlines the testing process and reduces manual intervention.

In terms of user interface, the 34970A is equipped with a large graphical display that provides clear visualization of measurement data and easy navigation through settings and options. The menu-driven interface makes it accessible for users of all skill levels, simplifying the setup and operation of the device.

Overall, the Agilent Technologies 34970A stands out for its modularity, high channel capacity, advanced measurement technologies, and user-friendly interface. As a reliable and efficient data acquisition system, it is well-suited for a wide range of applications, making it an essential tool for engineers and technicians looking to enhance measurement precision and efficiency.
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