Equipment information
IET Labs Inc. 1616 Test Set
Manufacturer:
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Model:
1616
Date:
2001
Category:
Group:
Description:
Precision Capacitance Bridge
Information
The 1621 Capacitance-Measurement system is designed for the
precise measurement of capacitors and capacitance standards.
In the standards laboratory, its high resolution for
capacitance and conductance make this system well suited for
capacitance standards measurements. Its phase-indicating
error meters facilitate rapid balancing. Convenient in-line
readout maximizes accuracy of manual data recording and BCD
outputs are provided for automatic data processing.
The 1621 system measures either 3-terminal or 2-terminal
capacitors. The transformer-ratio-arm circuitry of the
bridge assures that 3-terminal measurements can be made
accurately, even in the presence of large capacitances to
ground. For instance, a ground capacitance of 1 ;uF produces
an error of only 0.03% in the measurement of 1000-pF
capacitor. This feature makes the assembly very useful for
in situ measurements of ungrounded circuit capacitances.
The 1616 Precision Capacitance Bridge, one of the 3
instruments in that system, may be obtained separately. The
bridge will perform as described herein, if used with an
Oscillator and detector equivalent to the CiR 1316 and 1238.
NOTE
This manual describes the 1621 system generally and provides
its operating instructions. This manual also describes in
detail the 1616 bridge only.
A wide range of capacitances can be measured, extending from
the resolution limit of 0.1 aF (10‘7pF) to a maximum of 10
/if, with internal standards, or farther with external
standards. For 3-terminal unknown capacitors, a
pair of coaxial terminals is provided; for 2-terminal
coaxial "unknowns," a single precision connector facilitates
exacting control of fringing effects.
Since an important use of this bridge is the comparison of
capacitance standards, another pair of coaxial terminals is
provided on the bridge to which a 3-terminal reference
standard can be connected and designated EXTERNAL STANDARD.
The other standard is then connected to the selected UNKNOWN
terminals, and the internal standards are used to complete
the balance. If the ratio between the two standards is close
to 0.1, 1., or 10, the accuracy of the measurement is equal
to the accuracy of calibration of the reference standard,
and the precision of comparison is 1 part in 10s (0.01 ppm)
of a 10-pF capacitor (or even better for larger ones).
1.2 DESCRIPTION. Figure 1-1.
1.2.1 General.
The 1621 Precision Capacitance-Measurement System consists
of the 1616 Precision Capacitance Bridge with the 1316
Oscillator and the 1238 Detector, a complete system for the
precise measurement of capacitance.
Oscillator and detector are mounted above the bridge, in a
pedestal cabinet, as pictured in the front pages (and Figure
1-2); or the three instruments may be rack mounted.
Connecting cables, supplied, go neatly behind the assembly.
Manual Type:
Service and User Manual
Pages:
94
Size:
20.00 Mbytes (20969728 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
2001 01 01
Quality:
Scanned document, all readable.
Upload date:
2017 02 04
MD5:
0f18a413ef05df8c38d797519e504826
Downloads:
1223
Information
CONTENTS
Section 1 Warranty Characteristics
Section 2 Operating Instructions
Section 3 Circuit Description
Section 4 Maintenance
Section 5 Calibration
Section 6 Parts List and Schematics