Boonton Electronic 250-A Измеритель уровня
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Модель:
250-A
Дата:
Категория:
Группа:
Описание:
RX Meter
Информация
The RX Meter Type 250-A is a wide frequency range Impedance
Meter designed to permit accurate individual determination
of the equivalent parallel resistance and parallel reactance
of two- terminal networks and components. The instrument is
completely self-contained and consists,* fundamentally, of a
refined Schering bridge circuit, together with its
associated Oscillator, detector, Amplifier, null detector
and Power supply. Bridge balance is obtained by means of two
calibrated dials which indicate, respectively, parallel
resistance and parallel capacitance of the unknown.
B. SPECIFICATIONS
1. FREQUENCY RANGE: 0. 5 me to 250 me.
2. RESISTANCE MEASUREMENTS:
a. Range: 15 ohms to 100,000 ohms.
(Values from 0 to 1512 maybe measured indirectly.)
b. Accuracy:
/ ^ Rp Q
± 12 + ---- + ------ + — j % ± 0. 2 ohms
v 200 5000 20/
where f = frequency in megacycles R„ - equivalent parallel
resistance in. ohms indicated by RX Meter
Rp
Q -------
Xp
as determined from RX Meter readings.
3. CAPACITANCE MEASUREMENTS:
a. Range: 0 to 20 mmf. (May be extended to 120 mmf by use of
auxiliary resonating coils.)
b. Accuracy:±(0.5 ^ 0.5F2 *C*x 10-5)% ±-0.15/ifrf *F =
frequency (MC); C = RX Meter Cp reading (^f)
where f - frequency in megacycles.
4. INDUCTANCE MEASUREMENTS:
a. Range: Inductance values which will resonate with
capacitance from 0.1 mmf to 100 mmf over the frequency range
of the instrument. By the use of auxiliary series resistors
or capacitors, values of inductance maybe measured over the
following ranges.
Freq. Minimum Maximum
0.5 me 0* Ol^h 100 mh
250 me O.OOljuh 0.4 mh
5. VOLTAGE AT TEST TERMINALS:
DC voltage = 0. (DC up to 50 ma. may be passed thru the
terminals from external source.) RF voltage = approximately
0.1 to 0.5 volts.
6. POWER REQUIREMENTS:
Voltage, 105-125 volts? frequency, 50-60 cps, power
consumption,60 watts. (Voltage internally regulated.)
Hасто́льная кни́га тип:
Обслуживание и Руководство пользователя
Страницы:
36
Размер:
3.15 Mbytes (3298001 Bytes)
Язык:
english
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Hасто́льная кни́га ID:
Дата:
Качество:
Сканированный документ, читая частично плохо, частично не читается.
Дата загрузки:
2017 01 22
MD5:
86534b3d227737993e463036f8b9b96a
Загрузки:
531
Информация
I. Description
A. General 7
B. Specifications 7
C. Front Panel Controls & Indicators 7
D. Measuring Terminals 8
E. Application 8
II. Operation
A, Preparation for Use 9
B„ Preliminary Procedure 9
C. Measurement Procedure 9
III. Interpretation of Results
A. Significance of Dial Readings 10
B. Extension of Results 10
C. Sources of Error 10
IV. Theory of Operation
A» Overall Operation 12
B. The Bridge Circuit 12
C. The Oscillator Unit 13
D. Mixer Stage 14
E. Amplifier 14
F. Power supply 14
V. Maintenance & Adjustment
A, Trouble Shooting 14
1. Removal from Cabinet 14
2, Trouble Shooting Chart 15
B, Adjustments
1. Bridge Trimmer Adjustment 16
2, Reduction of Signal Level 16
Appendix A. Extension of Ranges
1. Low Resistance 18
2. Low Inductance 18
3. High Capacitance 19
Appendix B. Installation and Use of Co-ax Adapter Type 515-A
X. Specifications
2. Equipment Supplied
3. Installation Procedure
4. Preliminary Adjustment of EX Meter with Adapter Installed
5. Application
a. Remote Measurements
b. Transmission Line Characteristics
6. Normal Measurements with Adapter Plate in Place
Appendix C. Special Applications
1. Coaxial Transmission Line 22 Characteristics
2» Balanced Transmission Line 24 Characterists
3. Vacuum Tube Input Impedance 25
4. Measurement of non-Linear 25 Impedances
5. Use as Harmonic Analyzer 26
6. Method of Applying DC Bias 26