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HP 11049A Operating And Service Manual

Thermal converters
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11049A
11050A
11051A
THERMAL CONVERTERS
PACKARD
OPERATING
AND
SERVICE
MANUAL

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Summary of Contents for HP 11049A

  • Page 1 11049A 11050A 11051A THERMAL CONVERTERS PACKARD OPERATING SERVICE MANUAL...
  • Page 2 HEWLETT PACKARD CERTIFICATION The Hewlett-Packard Company certifies that this instrument was thoroughly tested and inspected and found to meet its published specifications when it was shipped from the factory. The Hewlett­ Packard Company further certifies that its calibration measurements are traceable to the U. S. National Bureau of Standards to the extent allowed by the Bureau's calibration facility.
  • Page 3 OPERATING AND SERVICE MANUAL (HP PART NO. 11049-90000) MODEL 11049A, 11050A, 11051A THERMAL CONVERTERS Copyright Hewlett-Packard Company 1967 P. O. Box 301, Loveland, Colorado, 80537 U. S. A. 01797-2 Printed: AUG 1967...

  • Page 5: Table Of Contents

    Calibration Accuracy General Specifications LI ST OF ILLUSTRATIONS Calibration Number Page Circuit Description Applications -hp- Model 11050A Thermal Converter Output Measurements Thermal Converter Schematic Diagram Frequency Response Measurements Input-Output Relationship Generating an Accurate Calibration Frequency Response Measurements Signal Test Signal Generation Thermal Converter Calibration 22.

  • Page 6: Specifications

    Weight: net g); shipping (450 nearly constant impedance over a wide frequency range. These Price: HP Model 1l049Ao)(', $125; HP Model 1l050A*, $125; characteristics make the thermal converters ideal to check the 11051A'*, $125.
  • Page 7 30 MHz to 60 MHz GENERAl. 60 MHz to 100 MHz ±l. 50% 2. The -hp- 1l049A. 1l050A. and 1l051A Thermal OPTION 01: Includes calibration to 60 MHz and Converters accurately convert ac input signals to de correctional data sheet covering frequency voltages proportional to the rms value of the input.

  • Page 9: Output Measurements

    Model 11049A Page 3 battery powered reference supply generates a stable reference voltage, opposing the thermal converter output; and the de null meter monitors the difference voltage. The battery's short term stability is good enough thatthe thermal converter output changes may , .

  • Page 10: Frequency Response Measurements

    Model l1049A Page 4 c. Adjust oscillator amplitucle for a null meter indication of about DO NOT EXCEED THE RATED INPUT OF d. Adjust reference supply for null indication THE THERMAL CONVERTER. ALWAYS within 1 MV. Once null is obtained, do not REDUCE THE INPUT BEFORE CHANGING readjust oscillator amplitude or reference FREQUENCY RANGE OF CIRCUIT UNDER...

  • Page 11: Test Signal Generation

    Model 11049A Page 5 difference in outputs is called the dc reversal error. The de reversal error is usually less than 0. 05% and doesn1t affect most measurements, but it should be DC STANDARD NULLMETER 7418 compensated to achieve maximum accuracy. Instructions...

  • Page 12: Thermal Converter Calibration

    Model 11049A Page 6 Adjust oscillator output so that null meter in­ dication is half way between indications re­ corded in steps d and e. This sets oscillator output to 1 volt rms. NULLMETER 419A g. Record error of instrument under test.

  • Page 13: Selection Of R2

    With the power supply off, connect the power column in Table 1, the thermal converter is supply, thermoelement. de voltmeter and an not operating properly. Refer to repair in­ initial value of H2. For 11049A, R2 should be structions in paragraph 25. a 240 and 270 resistor connected in series.

  • Page 14: Selection Of Rl

    ±O. 15 and is made up of two approximately equal a. With the power supply off, construct the resistors connected in parallel. In the 11049A Rl is about 55 in the Il050A Rl is about 65 and in the bridge shown in Figure 8.
  • Page 15 Figure 9, Proper Orientation of Components Connect an initial value of Rl as shown in Adjust drive voltage from power supply to the Figure 8. For 11049A use two 120 resistors following value. in parallel; for l1050A use a 150...
  • Page 16 38. Figure 10 shows the replaceable parts for the thermal converters. Included with each part is its 36. Observe the following precautions when installing -hp- part number, description , manufacturer, replacement thermoelement and Rl and R2. manufacturer! s part number, and total quantity.

  • Page 17: Replaceable Parts

    Model 11049A Page 11 PRODUCTION AND OFF" SOLDERED TOGETHER �c Mfr. Part No. Ref. No. -hp- Part No. Mfr. Description 30337-2 1250-0045 Connector: male BNC Dage Electric Co. 1920-02 2190-0016 Lock washer Sloss and Brittain A-131023-1 0360-0024 Lug: grounding P. R. Mallory Co.
  • Page 18 R3 in series with the thermoelement input. R3 is made up of two 10 \1, 1%, 1/8 resistors (-hp- Part No. 0757-0346) in parallel and is added to adjust the nominal 7. 5 V output. R3 may not be present on all instruments;...
  • Page 19 11049-90000 PRINTED IN U.S.A.

This manual is also suitable for:

11050a11051a

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