Product Description
The most important characteristic of any measurement instrument is repeatability and accuracy. The Magtrol Dial Weight Dynamometer uses the combination of a Hysteresis Brake and gravity to insure constant, reliable results. The brake torque rise is directly proportional to applied current. The calibrated weight system provides readings in standard engineering units through the use of multiple torque range scales provided on each size dynamometer.
Magtrol Dial Weight Dynamometers are a lower cost alternative to our standard (load cell) Hysteresis Dynamometers. The dial weight dynamometers are easy to operate, provide repeatable and accurate results, and will operate for many years with minimal maintenance. A Magtrol Dial Weight Dynamometer System can only operate manually in an open loop mode.
Features
- Models as low as 0.5 oz·in full scale to 200 lb·in Full scale. Each dial weight dynamometer comes with three weights to cover the three specified ranges.
- Metric scales are also available. Magtrol Dynamometers are certified to Mil-STD 45662A and are NIST traceable.
- Load can be adjusted from no load to full scale through simple potentiometer control on power supply.
- Magnetically coupled hysteresis brake provides smooth torque application independent of shaft speed. This permits testing motors from no load to locked rotor or armature.
Specifications and Drawings
| Model | Full Scale Torque (Range One) | Full Scale Torque (Range Two) | Full Scale Torque (Range Three) | Maximum Operating Speed (RPM) | Power Ratings - 5 Minutes (Watts) | Power Ratings - Continuous (Watts) | Downloads |
|---|
| HD-106-1 | 0.5 oz·in | 1 oz·in | 2 oz·in | 30,000 | 35 | 7 | pdf | step |
| HD-400-1 | 2 oz·in | 8 oz·in | 16 oz·in | 20,000 | 200 | 55 | pdf | step |
| HD-400-2 | 8 oz·in | 16 oz·in | 32 oz·in | 20,000 | 200 | 55 | N/A |
| HD-500-1 | 25 oz·in | 50 oz·in | 100 oz·in | 15,000 | 400 | 80 | step |
| HD-600-1 | 50 oz·in | 100 oz·in | 200 oz·in | 10,000 | 600 | 100 | pdf |
| HD-700-1 | 100 oz·in | 200 oz·in | 400 oz·in | 10,000 | 700 | 150 | pdf |
| HD-705-1 | 200 oz·in | 400 oz·in | 800 oz·in | 8,000 | 1400 | 300 | pdf |
All dynamometer models are within 1% accuracy, with the exception of the following:
| HD-106-1 | 0.5 oz·in range is 3.5% |
| HD-106-1 | 1.0 oz·in range is 2% |
| HD-400-1 | 2.0 oz·in range is 2% |
| HD-400-1 | 8 oz·in range is 2% |
| HD-400-2 | 8 oz·in range is 2% |
| HD-500-1 | 25 oz·in range is 2% |
System Options
To help you select the components for your motor testing system, this table shows which (currently available) electronics and software support Magtrol’s different types of dynamometers.
| Model | Description | Hysteresis Dynamometers (including ED Series) | Eddy-current Dynamometers | Powder Brake Dynamometers | Dial Weight Dynamometers |
|---|
| DYNAMOMETER CONTROLLERS |
| DSP7010 | Dynamometer Controller | • | • | • | |
| DSP7000 | High-Speed Programmable Dynamometer Controller | • | • | • | |
| OTHER ELECTRONICS |
| TSC Series | Torque/Speed Conditioner | | | | |
| 5500 | Dynamometer Switch Box | • | | | |
| 5501 | Dynamometer Switch Box | | • | • | |
| 5502 | Dynamometer Switch Box | • | | | |
| 5503 | Dynamometer Switch Box | | • | • | |
| SOFTWARE |
| M-TEST 7 | Motor Testing Software | • | • | • | |
| POWER SUPPLIES |
| DES Series | Power Supply | | • | • | |
| 5241 | Power Amplifier | Required for HD-825 Only | | | |
| 5242 | Power Amplifier | Required for HD-825 Only | | | |
| 5200 | Power Supply | | | | • |
| 5210 | Current-Regulated Power Supply | | | | • |
| 5250 | Current-Regulated Power Supply | | | | • |
| ACCESSORIES |
| TAB | Dynamometer Tables | • | • | • | • |
| AMF | Adjustable Motor Fixtures | • | | | |
| FMF | Fixed Motor Fixtures | • | | | |
| PT | T-Slot Base Plate | • | • | • | |
| FRS | Free-Run Speed Sensor | • | • | • | |
| SBB14 | Signal Breakout Box | • | • | • | |
| SBB15 | Signal Breakout Box | • | • | • | |
Dynamometer Selection
Magtrol Dynamometers cover a wide range of Torque, Speed and Mechanical Power ratings. To select the appropriate size Dynamometer for your motor testing needs, you will need to determine the Maximum Torque, Speed and Power applied to the Dynamometer:
Maximum Torque
It is important to consider all torque points that are to be tested, not only rated torque, but also Locked Rotor and Breakdown Torque. Dynamometer selection should initially be based on the maximum torque requirement, subject to determining the maximum power requirements.
Maximum Speed
This rating is to be considered independent of torque and power requirements, and is the maximum speed at which the Dynamometer can be safely run under free run or lightly loaded conditions. It is not to be considered as the maximum speed at which full braking torque can be applied.
Maximum Power Ratings
These ratings represent the maximum capability of the Dynamometer Braking System to absorb and dissipate heat generated when applying a braking load to the motor under test. The power absorbed and the heat generated by the Dynamometer is a function of the Torque (T) applied to the motor under test, and the resulting speed (n) of the motor. This is expressed in these power (P) formulas:
| SI: | P (watts) | = | T (N·m) | x | n (rpm) | x | (1.047 × 10-1) |
| English: | P (watts) | = | T (lb·in) | x | n (rpm) | x | (1.183 × 10-2) |
| Metric: | P (watts) | = | T (kg·cm) | x | n (rpm) | x | (1.027 × 10-2) |
All of Magtrol's controllers, readouts and software calculate horsepower
as defined by 1 hp = 550 lb·ft / s. Using this definition: |
| hp | = | P (watts) | / | 745.7 |
| To calculate power, use Magtrol's online motor power calculator |
The Dynamometer’s ability to dissipate heat is a function of how long a load will be applied. For this reason, the Maximum Power ratings given are based on continuous operation under load, as well as a maximum of 5 minutes under load.
To safely dissipate heat and avoid Dynamometer failure, the maximum power rating
is the most important consideration in selecting a Dynamometer.
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[post_content] => Magtrol’s AMF Series Adjustable Motor Fixtures are used to secure small to medium-sized motors in place while running any test. These extremely versatile fixtures also enable easy motor centering for coupling to a Magtrol HD Series Hysteresis Dynamometer. (Couplings can be supplied upon request.) Various motor lengths are accommodated by either an attached T-slotted base plate or sliding base, depending on the model.
The AMF-1, -2 and -3 Fixtures feature one or two adjustable bridges, each fitted with a fluted knob clamp screw, to allow clamping anywhere along the axis of the motor. The adjustable bridge on the AMF-V Fixture incorporates a straight-line action clamp with a V-angle rubber padded clamp to maximize the mounting area.
To safeguard the motor, locking thumb screws provide protection against vibration and all motor-to-fixture contact surfaces are nylon padded for scratch-free clamping.
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[post_content] => Magtrol's Model DSP7000 High-Speed Programmable. Dynamometer Controller employs state-of-the-art Digital Signal Processing Technology to provide superior motor testing capabilities. Designed for use with any Magtrol Hysteresis, Eddy-Current or Powder Brake Dynamometer, Magtrol In-Line Torque Transducer or auxiliary instrumentation, the DSP7000 can provide complete PC control via IEEE-488 or RS-232 interface. With up to 500 readings per second, the DSP7000 is ideally suited for both the test lab and the production line.
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[post_content] => Magtrol's M-TEST 7 is a state-of-the-art motor testing program for PC (Windows® 10/11 64-bit) based data acquisition. Used with a Magtrol Programmable Dynamometer Controller, M-TEST 7 works with any Magtrol Dynamometer or In-Line Torque Transducer to help determine the performance characteristics of a motor under test. Up to 63 parameters are calculated and displayed utilizing M-TEST 7's feature-rich testing and graphing capabilities.
National Instruments LabVIEW an integral component of any Magtrol Motor Test System, M-TEST 7 performs ramp, curve, manual, pass/fail, coast, temperature, locked rotor temperature and running heating temperature tests in a manner best suited to the overall efficiency of the test rig. Written in LabVIEW™, M-TEST 7 has the flexibility to test a variety of motors in a multitude of configurations. The data generated from this user-friendly program can be stored, displayed and printed in tabular or graphical formats, and is easily imported into a spreadsheet.
Magtrol can also make custom modifications to the software to meet additional motor testing requirements.
NOTE: M-TEST 7 does not support the following:
- 5240, 4629B or older controllers
- 4612B, 4614B or older power analyzers
- National Instruments FieldPoint analog I/O
- Advantech PCL-725, PCI-1760 digital I/O
**MTEST-7 Motor Test Software is offered as a single seat license. Additional seats can be purchased and added to the original license. Contact sales for pricing.**
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License Verification via Crypkey Casper E-Register
Casper eRegister provides automatic authorization of M-TEST 7 using serial numbers. With this solution, the customer pre-pays the license fee and is then provided with a serial number to automatically obtain a code to unlock M-TEST 7 via the Internet. Casper eRegister works 24/7/365, without human intervention.
Just click on the electronic registration button on the M-TEST 7 license configuration screen.
Analog Input Measurement
Up to 128 thermocouples or analog sensors can be read and monitored during a motor test. Heat rise curves on the bearings, windings and housing of a motor can be performed and air flow/exhaust efficiencies can be measured with an air tool or internal combustion engine. M-TEST 7, with its complete dynamometer control, even allows for analog measurement while performing load simulation for duty cycle and life testing.
Applications
M-TEST 7—besides being well-suited for simulating loads, cycling the unit under test and motor ramping—is also ideal for production line and inspection applications, due to its pass/fail test function. Another time-saving feature that engineering labs will benefit from, is the ability to duplicate tests and run them automatically. This versatile program is extremely valuable to anyone involved in motor testing.
System Minimum Requirements
- Personal computer with Intel® Pentium® i5 processor (or equivalent)
- Microsoft® Windows® 10/11 64-bit
- 8 GB RAM
- 5 GB of available hard drive space
- VGA color monitor with minimum screen resolution of 1024 × 768
- National Instruments™ PCI-GPIB card, GPIB-USB-HS Interface(available from Magtrol). The GPIB card can be used for interfacing with Magtrol DSP6000, DSP6001 or DSP7000 Controllers.
- In addition, a USB Interface can be used with the DSP7000 or DSP7010 Controller.
M-TEST 7 Viewer
M-TEST 7 Viewer allows the user to create and modify test setups, and view, graph and compare data – everything standard M-TEST 7 does except perform tests. Free download, unlimited use.
Download M-TEST 7 Viewer
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[post_content] => Magtrol’s AMF Series Adjustable Motor Fixtures are used to secure small to medium-sized motors in place while running any test. These extremely versatile fixtures also enable easy motor centering for coupling to a Magtrol
HD Series Hysteresis Dynamometer. (Couplings can be supplied upon request.) Various motor lengths are accommodated by either an attached T-slotted base plate or sliding base, depending on the model.
The AMF-1, -2 and -3 Fixtures feature one or two adjustable bridges, each fitted with a fluted knob clamp screw, to allow clamping anywhere along the axis of the motor. The adjustable bridge on the AMF-V Fixture incorporates a straight-line action clamp with a V-angle rubber padded clamp to maximize the mounting area.
To safeguard the motor, locking thumb screws provide protection against vibration and all motor-to-fixture contact surfaces are nylon padded for scratch-free clamping.
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