544-B: Difference between revisions

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|codes=ALOOF,ANNOY,AGREE
|codes=ALOOF,ANNOY,AGREE
|class=impedance measurement
|class=impedance measurement
|summary=megohm bridge
|summary=Megohm bridge
|image=GR 544-B Front Close-up.jpg
|image=GR 544-B Front Close-up.jpg
|caption=General Radio 544-B Megohm Bridge
|caption=General Radio 544-B Megohm Bridge
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* [[Media:GR 544-B Megohm Bridge 458-M 02_1960.pdf|General Radio 544-B Megohm Bridge 458-M 1960]]
* [[Media:GR 544-B Megohm Bridge 458-M 02_1960.pdf|General Radio 544-B Megohm Bridge 458-M 1960]]
{{Catalog History}}
{{Catalog History}}
* [[Media:GRwiki_Catalog_K1_OCR_1939.pdf|K1 (1939)]], p.90
* [[Media:GRwiki_Catalog_K2_OCR_1942.pdf|K2 (1942)]], p.84
* [[Media:GRwiki_Catalog_K3_OCR_1944.pdf|K3 (1944)]], p.82
* [[Media:GRwiki_Gatalog_K4_OCR_1945.pdf|K4 (1945)]], p.83
* [[Media:GRwiki_Catalog_L_OCR_1948.pdf |L  (1948)]], p.88
* [[Media:GRwiki_Catalog_M_OCR_1951.pdf |M  (1951)]], p.92
* [[Media:GRwiki_Catalog_N_OCR_1954.pdf |N  (1954)]], p.78
* [[Media:GRwiki_Catalog_O_OCR_1956.pdf |O  (1956)]], p.16
* [[Media:GRwiki_Catalog_P_OCR_1959.pdf |P  (1959)]], p.8
* [[Media:GRwiki_Catalog_Q_OCR_1961.pdf |Q  (1961)]], p.8
* [[Media:GRwiki_Catalog_R_OCR_1963.pdf |R  (1963)]], p.47
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{{References}}
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The '''General Radio 544-B Megohm Bridge''' was introduced in {{Catalog K1}} and remained available through {{Catalog R}}.
The {{Title|General Radio 544-B Megohm Bridge}} was introduced in {{Catalog K1}} and remained available through {{Catalog R}}, after which it was replaced by the [[1644-A]].


The Type 544-B Megohm Bridge is a null instrument using a Wheatstone bridge circuit.   
The Type 544-B Megohm Bridge is a null instrument using a Wheatstone bridge circuit.   

Latest revision as of 18:45, 16 April 2024

General Radio 544-B
Megohm bridge
General Radio 544-B Megohm Bridge

Available from 1939 to 1963

Manuals
Catalog History
 Document Year Page
Catalog K1 1939 90
Catalog K2 1942 84
Catalog K3 1944 82
Catalog K4 1945 83
Catalog L 1948 88
Catalog M 1951 92
Catalog N 1954 78
Catalog O 1956 16
Catalog P 1959 8
Catalog Q 1961 8
Catalog R 1963 47
(All manuals in PDF format unless noted otherwise)

The General Radio 544-B Megohm Bridge was introduced in Catalog K1 (1939) and remained available through Catalog R (1963), after which it was replaced by the 1644-A.

The Type 544-B Megohm Bridge is a null instrument using a Wheatstone bridge circuit. It uses a built-in vacuum tube voltmeter (VTVM) as a detector, and an AC power supply 544-P3 for both VTVM and the Unknown voltages.

The 544-B comes installed in an oak hardwood case with operating instructions attached to the inside of its cover. A flexible jack with lead is mounted in the cover for checking the internal standards as explained in the manual. The 544-B was also available modified for use with a battery power supply.

Specifications

  • Range: 0.1 MΩ to 1,000,000 MΩ
  • Accuracy: ±3% on the 0.1, 1, and 10 multipliers; ±4% on the 100 and 1000 multipliers
  • Output Voltage AC Supply: 100 V or 500 V, jumper-selectable
  • Short Circuit Current AC Supply: 12 mA

Links

Photos

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