HP 3467A Logging Multimeter
The HP 3467A Data Logger was introduced in the 1979 HP general catalog.
By combining the attributes of a 4 1/2 digit multimeter, a thermometer, a 4-channel scanner, a printer, and a microprocessor, the 3467A was designed as a benchtop, stand-alone instrument, and a time-saver for the everyday design engineer.
Capable of handling a major part of the measurements required during the course of a typical electronic design effort, this self-sufficient instrument measures AC and DC voltages, resistance, and, with external thermistors, temperature. It has a four-channel scanner, a thermal printer for permanent records, and an internal timer that allows unattended measurements. The 3467A requires no external control or I/O, yet it can perform computations on measurement data under pushbutton control.
The nucleus of this instrument is a 4 1/2 digit, autoranging multimeter, basically similar to the HP Model 3466A Digital Multimeter. The printer is a compact, moving-head, dot-matrix, thermal printer similar to those used on the HP-91 and HP-97 Calculators. Scanning is by means of reed relays. A microprocessor provides the communication between the multimeter, scanner, timer, and printer.
Inclusion of a microprocessor allows math operations to be implemented. Among other things, these make it possible to linearize and convert readings of thermistor resistance measurements into readings of temperature in °F or °C. Other operations performed with the math functions involve the use of channel 4 as a reference, designated "Y." Any of the other three channels, designated "X," may then operate on the reference so measurement results can be presented in the most desired format.
3467A
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The HP 3467A Data Logger was introduced in the 1979 HP general catalog.
By combining the attributes of a 4 1/2 digit multimeter, a thermometer, a 4-channel scanner, a printer, and a microprocessor, the 3467A was designed as a benchtop, stand-alone instrument, and a time-saver for the everyday design engineer.