DM44: Difference between revisions

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-The '''Tektronix DM44''' is a digital multimeter module that attaches to the top of the
+{{Plugin Sidebar
-[[464]], [[465]], [[466]], and [[475]]. It replaced the [[DM40]] and [[DM43]]. It is a 3½ Digit Multimeter.
+|manufacturer=Tektronix
+|series=464
+|type=DM44
+|summary=DMM top for [[464]]/[[465]]/[[466]]/[[475]]
+|image=Tek 475 with dm44.jpg
+|caption=DM44 on top of a [[475]] scope
+|introduced=1975
+|discontinued=(?)
+|designers=
+|manuals=
+* [[Media:070-2036-00.pdf|Tektronix DM44 Manual]]
+* [[Media:070-2038-00.pdf|Tektronix 465 and DM44 Operators Manual]]
+* [https://w140.com/tek_dm44_description.pdf DM44 Description]
-* [http://w140.com/tek_dm44_description.pdf DM44 Description (PDF)]
+* [https://hakanh.com/dl/docs/kitinstructions/040-0814-02.pdf 040-0814-02]: Installation of DM44 on [[465]] B052300 - B251074
-* [[Media:Tektronix_070-2038-00_465_Oscilloscope_and_DM44_Digital_Multimeter_Operators_Instruction_Manual_First_Printing_July_1976.pdf | Tektronix 465 and DM44 Operators Instruction Manual]]
+* [https://hakanh.com/dl/docs/kitinstructions/040-0815-01.pdf 040-0815-01]: Installation of DM44 on [[465]] B251075 & up
-* [[Media:DM44 070-2036-00.pdf|Tektronix DM44 Manual (PDF)]]
+* [https://hakanh.com/dl/docs/kitinstructions/040-0944-00.pdf 040-0944-00]: Installation of DM44 on [[465B]]
+* [https://hakanh.com/dl/docs/kitinstructions/040-0817-01.pdf 040-0817-01]: Installation of DM44 on [[475]]
+}}
+The '''Tektronix DM44''' is a 3½-digit digital multimeter module with manual range switching and LED readout that attaches to the top of the [[464]], [[465]], [[466]], and [[475]]. It replaced the [[DM40]] and [[DM43]].
 {{BeginSpecs}}
-{{Spec | DC V Range  | 0 to 1.2kV in 5 Steps }}
+{{Spec | DC V Range            | 200 mV to 1.2 kV in 5 decade steps }}
-{{Spec | DC V Resolution  | 100μV }}
+{{Spec | DC V Accuracy         | 0.1% of reading, ±1 Count }}
-{{Spec | DC V Accuracy    | 0.1% of reading, ±1 Count }}
+{{Spec | DC V Input Resistance | 10 MΩ, Removable internal wire strap to increase input resistance to 1000 MΩ on 200 mV and 2 V Ranges}}
-{{Spec | DC V Input Resistance | 10MΩ, Removable internal wire strap to increase input resistance to 1000MΩ on 200mV and 2V Ranges}}
+{{Spec | Max. Input            | ±1200 V (DC + peak AC) between positive input and Common input/chassis, ±500 V (DC + peak AC) to Chassis }}
-{{Spec | DC V Maximum Input Voltages, All Ranges |  ±1200V (DC + Peak AC) Between  Positive input and Common input/Chassis }}
+{{Spec | Resistance Range      | 200 Ω to 20 MΩ in 6 decade steps }}
-{{Spec | DC V Maximum Floating Voltage on COMMON |  ±500V (DC + Peak AC) to Chassis }}
+{{Spec | Resistance Accuracy   | 200 Ω to 2 MΩ, 0.25%, ±1 count; 20 MΩ, 0.30%, ±1 count }}
-{{Spec | Resistance Range | 0 to 20MΩ in 6 Ranges }}
+{{Spec | Temperature Range     | −55 °C to +150 °C (with [[P6430]] Probe) }}
-{{Spec | Resistance Resolution | 0.1Ω }}
-{{Spec | Resistance Accuracy 200Ω and 2kΩ Range | within 0.25%, ±1 count + Probe Resistance }}
-{{Spec | Resistance Accuracy 20kΩ,200kΩ and 2MΩ Ranges | within 0.25%, ±1 count }}
-{{Spec | Resistance Accuracy 20MΩ Range | within 0.30%, ±1 count }}
-{{Spec | Resistance Response Time 200Ω and 200kΩ Range | Within 1 Second }}
-{{Spec | Resistance Response Time 2MΩ and 20MΩ Range | Within 5 Seconds }}
-{{Spec | Temperature Range (with HP6430Probe) |-55 °C to +150 °C }}
 {{EndSpecs}}
 ==Links==
 * [https://lazyelectrons.wordpress.com/2018/02/18/tektronix-475a-dm44-repair/ Lazy Electrons Tektronix 475A & DM44 Repair Page]
-* [http://hakanh.com/dl/docs/kitinstructions/040-0814-02.pdf 040-0814-02]: Installation of DM44 on [[465]] B052300 - B251074
+* [https://www.youtube.com/watch?v=WPgkVThknYo Tek 475A / DM44 repair] by vintageTek Museum @ YouTube
-* [http://hakanh.com/dl/docs/kitinstructions/040-0815-01.pdf 040-0815-01]: Installation of DM44 on [[465]] B251075 & up
+{{Documents|Link=DM44}}
-* [http://hakanh.com/dl/docs/kitinstructions/040-0944-00.pdf 040-0944-00]: Installation of DM44 on [[465B]]
-* [http://hakanh.com/dl/docs/kitinstructions/040-0817-01.pdf 040-0817-01]: Installation of DM44 on [[475]]
 ==Pictures==
@@ Line 44: / Line 49: @@
 DM44-Circuit01.jpg | DM44 installed in a 475
 DM44-Removal01.jpg | DM44 Connectors to detach for removal from 475
+DM44-Underside.jpg | Underside of DM44
 </gallery>
 [[Category:Digital multimeters]]
 [[Category:Specifications needed]]
-[[Category:Introduced in 1975]]