|Taylor Electrical Instruments 171A Analog multimeter|
Taylor Electrical Instruments
|Description||Electronic Test Meter|
This is essentially a stable and sensitive Valve Voltmeter of very wide range, designed to meet the special requirements of the Radio and T.V. Engineer. It has the advantages of an extremely wide frequency coverage and very high input impedance, together with good accuracy and reliability. Rapid and simple operation is a feature of the instrument. The 171A is highly versatile, covering in addition to D.C. and A.C. voltage measurement, a wide range of resistance measurement. It can also be used as a direct reading wide range output meter, scaled direct in decibels. 30 useful ranges are available. The high input impedance allows much more accurate results than are possible with any other type of test meter when measuring in high impedance circuits, such as resistance coupled amplifiers. A.V.C. networks, etc. A centre zero facility is provided on the IV and 2.5V D.C. ranges to enable T.V. and F.M. discriminator alignment to be carried out. The 171A can measure up to 25 KV D.C. with an additional adaptor. The instrument is of quite exceptional utility, and forms a valuable acquisition in any workshop or laboratory. Basically the 171A consists of a balanced double triode twin cathode follower bridge network, and a miniature shunt-connected double diode R.F./A.F. probe, both compensated against drift. The removable fully screened probe allows connection to be made very close up to the circuit under test, and has a frequency response of ± 2dB from 6 c/s up to about 200 Mc/s. The D.C. or rectified A.C. out-of-balance voltage appearing across the valve bridge network is proportional to the input voltage to the instrument, and is applied via the range multipliers to the robust microammeter with 5" scale. The instrument is almost completely free from drift after a brief warming-up period. Accurate readings may be taken on the upper four voltage ranges only 20 secs, after switching on. A special heater balance compensation circuit ensures that zero and reading accuracy are virtually unaffected by mains voltage variations. All components are conservatively rated, and ihe meter movement is fully protected against any possibility of damage by overload.
These manuals are available for the above equipment:
|Taylor Electrical Instruments -- 171A -- Service and User Manual|
|Manual Type||Service and User Manual|
|Size||11.96 Mbytes (12539944 Bytes)|
|Quality||Scanned document, reading partly badly, partly not readable.|
|Upload date||25 May 2014|
|Downloads||215 since 25 May 2014|
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