DM44: Difference between revisions
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{{Plugin Sidebar | |||
[[464]] | |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] | |||
* [ | * [https://hakanh.com/dl/docs/kitinstructions/040-0814-02.pdf 040-0814-02]: Installation of DM44 on [[465]] B052300 - B251074 | ||
* [https://hakanh.com/dl/docs/kitinstructions/040-0815-01.pdf 040-0815-01]: Installation of DM44 on [[465]] B251075 & up | |||
* [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 | 200 mV to 1.2 kV in 5 decade steps }} | |||
{{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 | Max. Input | ±1200 V (DC + peak AC) between positive input and Common input/chassis, ±500 V (DC + peak AC) to Chassis }} | |||
{{Spec | Resistance Range | 200 Ω to 20 MΩ in 6 decade steps }} | |||
{{Spec | Resistance Accuracy | 200 Ω to 2 MΩ, 0.25%, ±1 count; 20 MΩ, 0.30%, ±1 count }} | |||
{{Spec | Temperature Range | −55 °C to +150 °C (with [[P6430]] Probe) }} | |||
{{EndSpecs}} | |||
==Links== | |||
* [https://lazyelectrons.wordpress.com/2018/02/18/tektronix-475a-dm44-repair/ Lazy Electrons Tektronix 475A & DM44 Repair Page] | |||
* [https://www.youtube.com/watch?v=WPgkVThknYo Tek 475A / DM44 repair] by vintageTek Museum @ YouTube | |||
{{Documents|Link=DM44}} | |||
==Pictures== | |||
<gallery> | <gallery> | ||
Tek | Tek 475 with dm44.jpg|475 with DM44 | ||
Tek 466 with dm44.jpg|466 with DM44 | Tek 466 with dm44.jpg|466 with DM44 | ||
dm44-input.jpg | Inputs (side panel) | |||
DM44_Top.jpg | DM44 Board Top View - Installed in a 475A | |||
DM44_onBench_Side.jpg |DM44 PCB/Module Side view | |||
DM44_onBench_Front.jpg |DM44 PCB/Module Front view | |||
DM44_onBench_Top.jpg | DM44 PCB/Module Top view | |||
DM44_onBench_Under.jpg | DM44 PCB/Module PCB Trace side | |||
DM44_Scope_Cover.jpg | DM44 Install - Cutout in 475A Case | |||
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> | </gallery> | ||
[[Category:Digital multimeters]] | [[Category:Digital multimeters]] | ||
[[Category:Specifications needed]] | [[Category:Specifications needed]] | ||
Latest revision as of 07:01, 12 October 2023
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.
Key Specifications
DC V Range | 200 mV to 1.2 kV in 5 decade steps |
---|---|
DC V Accuracy | 0.1% of reading, ±1 Count |
DC V Input Resistance | 10 MΩ, Removable internal wire strap to increase input resistance to 1000 MΩ on 200 mV and 2 V Ranges |
Max. Input | ±1200 V (DC + peak AC) between positive input and Common input/chassis, ±500 V (DC + peak AC) to Chassis |
Resistance Range | 200 Ω to 20 MΩ in 6 decade steps |
Resistance Accuracy | 200 Ω to 2 MΩ, 0.25%, ±1 count; 20 MΩ, 0.30%, ±1 count |
Temperature Range | −55 °C to +150 °C (with P6430 Probe) |
Links
- Lazy Electrons Tektronix 475A & DM44 Repair Page
- Tek 475A / DM44 repair by vintageTek Museum @ YouTube
Documents Referencing DM44
Document | Class | Title | Authors | Year | Links |
---|---|---|---|---|---|
Tekscope 1976 V8 N3.pdf | Article | Taking the Delay out of Delaying Sweep Measurements | Bill Law | 1976 | DM44 |
Pictures
-
475 with DM44
-
466 with DM44
-
Inputs (side panel)
-
DM44 Board Top View - Installed in a 475A
-
DM44 PCB/Module Side view
-
DM44 PCB/Module Front view
-
DM44 PCB/Module Top view
-
DM44 PCB/Module PCB Trace side
-
DM44 Install - Cutout in 475A Case
-
DM44 installed in a 475
-
DM44 Connectors to detach for removal from 475
-
Underside of DM44