The Agilent / HP 3456A is a versatile Digital Voltmeter with ac, dc, ohms and various math functions. This voltmeter is an excellent bench meter and since it is remotely programmable it is an exceptional system measurement device.
The Agilent / HP 3456A also employs a feature called AUTO ZERO which is very useful for good stability. The internal reference device and reference resistors are also selected for good accuracy and stability.
Another good feature is the TEST function of the 3456A. With this function the instrument's operation can be partially verified for correct operation by the operator.
The HP 3456A can be rack mounted by adding rack mounting kit option 908 or 909. The rack mount kits are designed to permit mounting of the 3456A in a standard 19 inch rack, provided that sufficient rear support is available.
An external trigger input to the 3456A is provided by a BNC connector located at the rear panel of the instrument.
A Voltmeter Complete output is also provided by the 3456A through a BNC connector located at the rear panel. This connector provides an output which is composed of a TTL level signal and is generated during a measurement cycle.
The Test Operation of 3456A consists of certain analog gain, offset, and digital checks when the TEST button is pressed.
The HP 3456A is capable of measuring dc voltages from 100 nanovolts through 1000 volts in five ranges. All the ranges are overload protected from input voltages up to 1000 V peak.
The Agilent / HP 3456A uses a True RMS converter is able to measure voltages from 1 micro V to 700 V RMS in four ranges: 1 V, 10 V, 100 V and 1000 V. All ranges are protected from input voltages up to 1000 V peak or 700 V RMS, whichever is less.
The AC + DC mode of the 3456A measures the combined ac and dc components of the input signal and displays its RMS value.
The Agilent / HP 3456A is capable of measuring resistance from 100 micro ohm to 1 giga-ohm in eight ranges.