HP 4278A INTRODUCTION
Introduction
The HP 4278A 1kHz/1MHz Capacitance Meter is designed for capacitance and loss factor
(0, Q, ESR, and G) measurements on capacitor production lines, in quality assurance de-
partments, and in incoming/outgoing inspection.
Accurate
The 4278A's capacitance measurement accuracy is ±0.05% (at 1MHz) and ±0.07% (at 1 kHz)
with 6 digit resolution In all measurement ranges, --- 1pF to 2048pF (at 1MHz) and 100pF to
100uF (at 1 kHz). Dissipation factor (0) accuracy is ±0,0002 (at 1MHz) and ±0.0005 (at
1kHz) with 10ppm resolution, without degrading measurement speed. The test signal level
can be selected from 0.1V to 1.0V in 0.1V steps.
High Speed
The 4278A can perform measurements as quickly as 6.5ms per measurement. Minimize
production test times by using the 4278A's built-in comparator with the Option 201 handler
interface.
Built-in Comparator
The 4278A's built-in comparator allows you to sort comparison/decision results into a maxi-
mum of 10 bins. By using the interface options, the 4278A can easily be combined with a
component handler and a system controller to fully automate capacitor testing, sorting, and
quality control data processing, resulting in increased production efficiency.
Error Correction
The 4278A's zero offset capability compensates measurement results for the residual im-
pedance and stray admittance of handlers and test fixtures. Also, the 4278A's standard
compensation function allows you to compensate for complex measurement errors that may
be induced at the point of test device connection.
Menu Driven Operation
The 4278A's menu driven software uses five softkeys located to the right of the LCD. Soft-
key labels can be selected by using the MENU, PREV, and NEXT softkey control keys.
Recallable Control Settings
The 4278A's control settings (measurement conditions and comparator settings) can be
stored and recalled easily by using the memory card feature. This feature allows you to
store control settings for a test on a memory card (one card per test), then simply insert the
memory card and press the LOAD key.
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