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Free Software Saves You Time and Money
BenchLink Datalogger software gives you a familiar Windows® interface for test configuration and real-time data display and analysis. Even better, this full-featured data logging application is included free with every standard 34970A.

Datalogger/Data Acquisition System In One
In the past, you had to choose between the simple operation and low cost of a Datalogger or the flexibility and higher performance of a modular data acquisition system. The 34970A gives you the best of both: a simple user interface with low per-channel cost, modular construction and impressive measurement performance.

Log Up To 120 Channels
Configured with a 20-channel relay multiplexer, the 34970A is a powerful, low-cost datalogger that's quick to set up and easy to run. It's perfect for a multitude of data logging and monitoring applications, either stand-alone or with a computer. Its modular design makes it scaleable from 20 to 120 channels, and lets you add actuator, digital I/O and analog output channels for simple control.Its rugged features make it perfect for portable applications, and its small footprint makes it ideal for cramped benchtop testing. Standard HP-IB (IEEE 488) and RS-232 interfaces let you program the instrument for automated tests.
The 34970A measures and converts 11 different input signals: temperature with thermocouples, RTDs, and thermistors; DC/AC volts; 2- and 4-wire resistance; frequency and period; DC/AC current.
Alarms are available on a per-channel basis as well. Enter a high limit, a low limit, or both. You can assign one of four TTL alarm outputs to any input channel to trigger external alarm lights, sirens, or send a TTL pulse to your control system, without a PC connected.
A special display mode monitors a selected input channel, continuously updating the display with new readingsóeven during a scan. Itís great for checking a key input, or for troubleshooting your system before a test.
All readings are automatically time-stamped and stored in a non-volatile 50,000-reading memory, enough to hold more than a weekís worth of data. The memory holds your data even after power is removed, so you can use the 34970A to collect data at a remote location for later uploading to a PC. And because system configuration is stored in memory, if you lose power in the middle of a test, the unit resumes scanning when power is returned.
The internal 6 1/2 -digit DMM adds the performance of a world-class, stand-alone DMM to the 34970A, but at a fraction of the cost and in a fraction of the space. It’s as accurate as the best bench DMM available: 0.004% basic DCV accuracy, 0.06% basic accuracy, and 0.01% basic resistance accuracy. Patented technology offers outstanding linearity along with 22 bits of real resolution. And since it is an integrating A/D, it provides excellent noise rejection as well. If you need high scan rates, the 34970A is capable of delivering fully converted measurements directly to HP-IB to RS-232 at speeds of up to 250 ch/s. The input section of the DMM is optically isolated and shielded from the 34970Aís earth-referenced circuitry and computer interface, offering up to 300V or input isolation.
The internal DMM lets you measure 11 types of inputs easily and inexpensively. Built-in signal conditioning and conversion routines turn raw inputs directly into real information.