DM44: Difference between revisions

Revision as of 13:37, 26 March 2021

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 1000MΩ on 200mV and 2V 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 (with HP6430 Probe)	−55 °C to +150 °C

Links

Lazy Electrons Tektronix 475A & DM44 Repair Page
040-0814-02: Installation of DM44 on 465 B052300 - B251074
040-0815-01: Installation of DM44 on 465 B251075 & up
040-0944-00: Installation of DM44 on 465B
040-0817-01: Installation of DM44 on 475

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

@@ Line 1: / Line 1: @@
-The '''Tektronix DM44''' is a digital multimeter module that attaches to the top of the
+[[File:Tek 475 with dm44.jpg|thumb|300px|right|DM44 on top of a [[475]] scope]]
-[[464]], [[465]], [[466]], and [[475]]. It replaced the [[DM40]] and [[DM43]]. It is a 3½ Digit Multimeter.
+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]].
 * [http://w140.com/tek_dm44_description.pdf DM44 Description (PDF)]
@@ Line 7: / Line 7: @@
 {{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 Input Resistance | 10MΩ, Removable internal wire strap to increase input resistance to 1000MΩ on 200mV and 2V Ranges}}
+{{Spec | DC V Input Resistance | 10 MΩ, Removable internal wire strap to increase input resistance to 1000MΩ on 200mV and 2V Ranges}}
-{{Spec | DC V Maximum Input Voltages, All Ranges |  ±1200V (DC + Peak AC) Between  Positive input and Common input/Chassis }}
+{{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 Floating Voltage on COMMON |  ±500V (DC + Peak AC) to Chassis }}
+{{Spec | Resistance Range | 200 Ω to 20 MΩ in 6 decade steps }}
-{{Spec | Resistance Range | 0 to 20MΩ in 6 Ranges }}
+{{Spec | Resistance Accuracy | 200 Ω to 2 MΩ, 0.25%, ±1 count; 20 MΩ, 0.30%, ±1 count }}
-{{Spec | Resistance Resolution | 0.1Ω }}
+{{Spec | Temperature Range (with HP6430 Probe) |−55 °C to +150 °C }}
-{{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==

DM44: Difference between revisions

Revision as of 13:37, 26 March 2021

Key Specifications

Links

Pictures

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