Equipment information

Spraque Electric Company TCA-1 Analyzer
Spraque Electric Company
Model TCA-1
Category: Measurement instruments
Group Analyzer
Description Capacitor Analyzer
                                    1.1	Purpose and Usefulness. The TCA-1 was designed
specifically to enable design engineers, inspection
departments ana service engineers to test all types of
capacitors (electrolytic, film, and ceramic) used in
transistor circuits without harm to the capacitor regardless
of voltage rating. It incorporates in one compact instrument
a multirange capacitance and power factor bridge, an
insulation resistance checker for film, paper, mica and
ceramic capacitors, and a leakage current test circuit for
electrolytic (including all types of tantalum) capacitors.
All functions are selected by a single knob, and a magic eye
indicator simplifies bridge balancing for capacitance and
power factor measurements. The large meter gives direct
readings of insulation resistance and leakage current, and
shows the exact voltage applied to electrolytic capacitors
during the leakage test.

1.2	The especially valuable features incorporated into the
TCA-1 are:

a.	The low a-c voltage applied to the bridge circuit during
the capacitance and power factor measurements is 0.5 volts.
The actual a-c voltage across the capacitor is therefore
less than 0.5 volts depending upon the magnitude of the
capacitance being measured;

b.	The special low capacitance circuit for measuring low
values of ceramic and mica capacitors (from 1 mmf to 100
mmf) with improved accuracy;

c.	The insulation resistance test with a range up to 20,000
megohms with only 25 volts applied to the test circuit;

d.	Provision for measuring the insulation resistance of even
3 volt ceramic capacitors without over-stressing the insulation;

e.	The high gain meter amplifier which provides a full scale
sensitivity of 0.6 /¿A for measuring the leakage current of
low voltage electrolytic and ceramic capacitors;

f.	The etched circuit and encapsulation techniques which
make possible the high-gain and long-time stability of the
meter amplifier;

g.	The voltage regulator (magnetic and electronic) which
contributes in a large measure to the stability and accuracy
of the instrument even though the line voltage varies from
105 to 125 volts;

h.	The high-gain null detector amplifier with a gain control
thus enabling the user to select the best combination of
detector sensitivity and ease of operation for his
particular application;

i.	Automatic discharge of the capacitor under test;

j. Shielding of small capacitors under test to prevent
errors due to stray pick-up;

k. Overload protection of the meter;

1. Easily followed operating procedures shown on the
pull-out slide at the base of the instrument.

These manuals are available for the above equipment:

Manual Type Service and User Manual Sprague-8045-Manual-Page-1-Picture
Pages 16
Size 2.61 Mbytes (2738946 Bytes)
Language english
Quality Scanned document, reading partly badly, partly not readable.
Upload date
MD5 4bcb2f811ca82fef7ccd9ee413208471
Downloads 146 since 18 September 2016

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