Hewlett Packard - 434A - Level Meter
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Hewlett Packard 434A
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Equipment:
434A
Date:
1959
Category:
Group:
Sub Group:
Information
Model 434A is a power meter which bridges the gap between
bolometric methods and conventional calorimetric methods
while retaining the advantages of both. Bolometric methods
of power measurement using the self-balancing principle are
fast, but the upper limit of power measurement is quite low
(10 to 100 mw). On the other hand, conventional calormetric
methods are slow, and are not suitable at powers less than
about 1 watt.
By combining the self-balancing principle with a
calorimetric device, fast response has been obtained over
the range from 1 milliwatt to 10 watts.
1 Manual
Service and user manual
Manual type:
Service and user manual
Pages:
40
Size:
2.5 MB
Language:
english
Revision:
Manual-ID:
434A001
Date:
January 1959
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
Dec. 30, 2017
MD5:
931f42c0-4d58-9161-331a-671b86fba64b
Information
Serial 151 and above.
SECTION I GENERAL DESCRIPTION Page
1-1
Introduction...1-1
1-2
Specifications...1-1
1-3 Damage in
Transit...1-1
1-4
Installation...1-1
SECTION II OPERATING INSTRUCTIONS
2-1
Introduction...II
- 1
2-2 Controls and
Terminals...II - 1
2-3 Operating
Precautions...n-1
2-4 Filling the
Reservoir...II - 1
2-5 Operating
Procedure...II - 1
2-6 Attainable
Accuracy...II - 1
SECTION III THEORY OF OPERATION
3-1
Introduction...Ill
- 1
3-2 Over-all Operation
...Ill - 1
3-3 Input
Bridge...in - 1
3-4 AC Amplifier ynchronous Detector, and Filter Ill - 2
3-5 DC Amplifier and
Clamp...Ill - 2
3-6 Range
Switch...Ill - 2
3-7 Meter
Circuit...Ill - 2
3-8 Oscillator Ill
- 2
3-9 Power Supply and Voltage
Regulator...in - 3
3-10 Oil
System...HI - 3
SECTION IV MAINTENANCE
4-1
Introduction...IV-1
4-2 Cabinet Removal
...IV-1
4-3 Periodic
Maintenance...IV-1
4-4 Conversion to 230 Volt
Operation...IV-1
4-5 Tube Replacement
Chart...IV-1
4-6 Cleaning the Oil Filter IV - 2
4-7 Power Supply Adjustment...IV-2
4-8 Oscillator IV-2
4-9 Synchronous
Detector...IV-2
4-10 Adjust DC
Zero...IV-3
4-11 Adjust Phase
Balance...IV-3
4-12 Adjust Bridge
Balance...IV-3
4-13 Clamp Operation Check ...IV-3
4-14 Over-all
Check...IV-5
4-15 Measuring Compensated
Error...IV-5
4-16 Trouble
Location...IV-6
4-17 Measuring
Gain...IV-6
4-18 Excessive Compensated
Error...IV-6
4-19 Removing Head Box
Assembly...IV-6
SECTION V TABLE OF REPLACEABLE PARTS
5-1 Table of Replaceable Parts... V-l
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