Product Description
Magtrol Model 4618B Digital Dynamometer Readout – Precision Torque and Speed Display Unit
This used Magtrol Model 4618B is a digital readout designed to display torque and speed measurements from compatible Magtrol dynamometers . This unit operates from either 120V/60Hz or 240V/50Hz power sources and features a GPIB (IEEE-488) interface for computer control .
The 4618B displays torque with 4 digits (floating point, preceded by ± sign indicating CW/CCW direction) and RPM with 5 digits (resolution to 1.0 RPM) . The update rate on both displays is 0.5 seconds .
Condition Note: This unit is untested and sold as-is. No dynamometer, ribbon cable, or GPIB cable is included unless specified.
Key Specifications
| Specification | Details |
|---|---|
| Manufacturer | Magtrol, Inc. |
| Model | 4618B |
| Type | Digital Dynamometer Readout |
| Torque Display | 4 digits, floating point, ± sign for direction |
| Speed Display | 5 digits, 0.5 sec update, 1 RPM resolution |
| Speed Accuracy | ±0.05% of reading, ±1.0 RPM |
| Computer Interface | GPIB (IEEE-488) / HPIB |
| GPIB Data Format | ASCII: “SdddddTddddL” (5 digit speed, 4 digit torque, L/R direction) |
| GPIB Termination | Carriage Return (CR) + Line Feed (LF) |
| Default Primary Address | 08 (factory setting) |
| Memory | 380 complete display test values |
| Power | 120V/60Hz or 240V/50Hz (selectable) |
| Power Cord | Detachable NEMA Standard 3-wire |
| Line Cord Receptacle | Contains voltage selector switch |
| Physical | Cabinet must be earth grounded for proper operation |
| Torque Accuracy Contribution | ±0.005%/°C temperature drift (conversion elements only) |
| Condition | Used – Untested |
Front Panel Features
| Control | Function |
|---|---|
| Torque Display | 4-digit LED with ± sign |
| Speed Display | 5-digit LED |
| SAVE Button | Snapshot current readings to memory (380 values max) |
| CLEAR Button | Clear memory (press SAVE + RECALL simultaneously) |
| RECALL Button | Recall stored readings from memory |
| RESET Button | Exit recall mode, reset memory pointer |
| HI-RES Button | Increases torque resolution by factor of 5 |
Memory Operation Notes:
-
The SAVE LED indicates data in memory
-
When memory is full, display momentarily flashes “HELP”
-
Pressing SAVE + RECALL simultaneously clears memory (all three LEDs briefly illuminate)
Applications
-
Motor Testing: Displaying torque and speed from dynamometer during motor characterization
-
Quality Control: Production testing of motors, gearboxes, and rotational devices
-
R&D Laboratories: Data acquisition for prototype motor development
-
Educational Labs: Teaching dynamometer operation and motor performance testing
-
Automated Test Systems: GPIB interface enables computer-controlled data acquisition
Condition
SOLD AS IS
USED – PULLED FROM SURPLUS
FUNCTIONALITY NOT TESTED
NO DYNAMOMETER, RIBBON CABLE, OR GPIB CABLE INCLUDED (unless specified)
POWER CORD NOT INCLUDED
⚠ POWER REQUIREMENT: This unit requires a NEMA-standard 3-wire power cord (not included). The line cord receptacle contains a voltage selector switch – verify 120V/240V setting matches your line voltage before applying power.
⚠ GROUNDING WARNING: The cabinet must be earth grounded for proper equipment operation and personnel safety.
| Weight | 15 lbs |
|---|---|
| Dimensions | 20 × 20 × 12 in |
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