I GENERAL INFORMA TION
1.1 FEATURES
The TF 2700 Universal Bridge is a compact, self contained instrmnent
that brings new versatility to the rapid determination of a wide range of
impedance values. Facilities are provided far the application of external
a.c. and d.c. supplies far use in a variety of specialized measurement
procedures.
The internaI energizing sources far the bridge are a 1 kc/ s oscillator
far a. c. measurements of capacitance, inductance and resistance; and the
9 V power supply battery far d.c. resistance measurements. The detector
has been designed to have a usable response from 20 c/s to 20 kc/s. This
allows an external source to be used to energize the bridge far measure-
menta aver a more representative range of frequencies. D. C. voltages
higher than that of the battery may alBo be applied externally {or improved
discrimination with re sistance measurement&.
Another facility enables a d. c. bias to be applied to the component
under test. Up to 500 V may be used far polarizing electrolytic capacitors
or far investigating the properties of non-linear resistors. Alternatively,
upto 40 mA may be passed through iron cored inductors by suitable external
connections or up to 200 mA when using the D.C. Choke Adaptor, TM 6113.
2700 (1 b) 3
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