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The HP 3456A Digital Multimeter measures dc, true RMS ac voltage and resistance. Five full scale dc ranges from 0.1 volt to 1000 volts are provided. Measurement speed and accuracy can be enhanced for a specific application, using the HP 3456A's selectable integration time (up to 100 power line cycles) and settling time. An operator can select up to 330 readings/second for high speed bursts or one reading every fifteen minutes for periodic measurements. Resolution of 100 nanovolts at 48 readings/second (61/2 digits) to 10 microvolt resolution at 330 readings per second (31/2 or 4 1/2 digits) can be selected. Because the Agilent 3456A uses an integration technique with features such as "Program Memory" and "Reading Store", the operator can obtain the fastest possible reading rate with the most noise rejection. The first reading is correct, every time. The HP 3456A built-in memory is divided into two parts (Program and Reading Store). This feature lets the operator choose the length of program and the number of readings to be stored. For example, one could store an instrument command string 8 bytes long in program memory with room for 348 stored readings. The size of the HP 3456A memory is 1400 bytes long. Transfer standard performance is assured with the HP 3456A. With good repeatability and 100 nanovolt sensitivity, accuracy on the ten volt range is ±0.0008% +2 counts over a 24-hour period at 23 °C ± 1°C. Four full-scale, true TRMS ac voltage ranges are provided, with reading speeds up to 12 per second speed over a 20 Hz to 250 kHz frequency range with I microvolt resolution (6 digits). Best accuracy is 0.05%. Crest factor is greater than seven at full scale. Options. Opt 050: Noise rejection for 50 Hz. Opt 060: Noise rejection for 60 Hz.
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