1864: Difference between revisions

Revision as of 13:40, 19 April 2024

General Radio 1864

Megohmmeter

Available from to

Manuals

Catalog History

Document	Year	Page
Catalog U	1970	98
Catalog73	1973	182

(All manuals in PDF format unless noted otherwise)

The GR Type 1864 Megohmmeter was introduced in Catalog U (1970). It is still available from IET Labs as of 2024.

Test Voltage: 10 V to 109 V in 1 V steps, 100 V to 1090 V in 10 V steps; 10 mA limit
Resistance Range: 0.5 MΩ 20 200 TΩ in 8 ranges

The Model 1863 is similar but with a 20 TΩ top range, and a choice of only five test voltages (50, 100, 100, 250, or 500 V).

The 1864 is solid-state except for the test voltage supply pass element, a 6AB4 (EC92) vacuum tube.

@@ Line 1: / Line 1: @@
 {{GR Product
 |model=1864
+|codes=1864-9700, 1864-9701
 |class=
 |summary=Megohmmeter
@@ Line 11: / Line 12: @@
 |manuals=
 * [[Media:GR 1863 and 1864 Instruction Manual 1863-0100-00.pdf|GR 1863 and 1864 Instruction Manual (1863-0100-00)]]
+* [[Media:GR 1863 and 1864 Instruction Manual 1863-0100-C 1974-08.pdf|GR 1863 and 1864 Instruction Manual (1863-0100-C, 1974)]] (readable schematics)
 * [https://www.ietlabs.com/pdf/Manuals/1863-64_im.pdf GR1863/1864 Instruction Manual, Aug 2018] @ IET Labs
 {{Catalog History}}
 }}
-The {{Title|GR Type 1864 Megohmeter}} was introduced in {{Catalog U}}.
+The {{Title|GR Type 1864 Megohmmeter}} was introduced in {{Catalog U}}.  It is still [https://www.ietlabs.com/genrad-1864-megohmmeter.html available from IET Labs] as of 2024.
 ==Specifications==
+* '''Test Voltage:''' 10 V to 109 V in 1 V steps, 100 V to 1090 V in 10 V steps; 10 mA limit
+* '''Resistance Range:''' 0.5 MΩ 20 200 TΩ in 8 ranges
 ==Links==
+* The Model [[1863]] is similar but with a 20 TΩ top range, and a choice of only five test voltages (50, 100, 100, 250, or 500 V).
 ==Internals==