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Boonton Electronic 72B Level Meter
Boonton Electronic
Modell: 72B
Datum: 1985
Kategorie: Messgeräte
Gruppe: Level Meter
Beschreibung: Capacitance Meter
                                    The Model 72B Capacitance Meter provides instant, direct
reading, three- terminal and differential capacitance
measurements from 0.01 to 3000 pF. This coverage is divided
into eight ranges, selected either by the front- panel
switch or remotely, arranged in a 1 - 3 - 10 sequence. The
solid- state design and crystal-controlled signal source
contribute to the high stability and excellent reliability
of the instrument.
The 1 MHz test signal is held to a level of 15 mV, r.m.s.
(option -03 is 100 mV) , allowing the measurement of
capacitance of semiconductor devices. The provision for
application of d.c. bias to either or both sides of the
specimen makes it possible to measure these devices under
normal operating conditions. The bias voltages can be
applied either to the rear-panel terminals provided, or to
the appropriate pins on the edge connector.
The 72B employs an unusual range-switching system using
switching diodes and miniature reed relays; the elimination
of the switch contacts from the measurement circuits assures
a maximum of reliability and stability.
The instrument's phase-sensitive detector system permits the
measurement of even low^O devices {down to Q=l) without
appreciably degrading the accuracy of the measurement. The
72B responds to the effective parallel capacitance of the
test specimen. For a specimen with predominantly series loss
and a
0-factor of less than 10, the 72B will indicate the
effective parallel capacitance; i.e.:
Cp = CSQ2/{1 + Q2 )
Two plug-in connection adapters are supplied with the 72B,
One adapter, fitted with two sets of coaxial connectors,
72-4B, is intended for use with coaxial cables and remotely
located test fixtures for both three-terminal and
differential measurements. The second adapter, 72-5C, with
three terminal posts, is used for wire-lead components;
differential measurements are not possible with this adapter.
A linear d.c. output is available at rear-panel terminals as
well as at the appropriate pins on the edge connector. This
feature extends the range of applications beyond ordinary
laboratory measurements to include production testing as
well as a variety of control functions. Flexibility is
further enhanced by the provision of remote ranging terminals.
Remote ranging is controlled by grounding the MANUAL DISABLE
terminal on the rear edge connector, disabling the
front-panel range switch. ^Grounding any one of the eight
range-line terminals will then select that range.
Connection to the rear-panel edge connector should be made
with an Amphenol Type 225-22221-101 jack.

Folgende Handbücher sind hierfür verfügbar:

Boonton Electronic -- 72B -- Service- und Bedienungsanleitung
Dateiname: Boonton-8605-Manual-Page-1-Picture
Dokumenttyp: Service- und Bedienungsanleitung
Seitenanzahl: 40
Dateigröße: 1.51 Mbytes (1586679 Bytes)
Sprache: Englisch
Datum: 01 Februar 1985
Qualität: Gescanntes Dokument, alles ist lesbar.
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MD5: 32ec391bfca66c8142fa2be2a7521861
Downloads: 32 seit dem 28 Januar 2017
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Comments (1)

Topic: Boonton Electronic 72B
0/5 (0)
Stephen Hanselman
Jul 2017
First Poster
has troubleshooting schematic but no detailed schematics

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