Application Note
Bently Nevada 200150 Accelerometer Testing
Test differential 5 V powered accelerometers using the AT-2040 and MEMS-100 adapter.
The Bently Nevada 200150 is different from a typical IEPE accelerometer. Instead of a standard single-ended IEPE signal, the 200150 uses 5 V excitation and a differential SIG+ / SIG- output.
The AT-2040 supports this application using the MEMS-100 adapter, allowing the sensor to be powered, read, and tested under controlled vibration from the AT-2040 shaker. The 200150 should be tested through the MEMS-100 adapter, not as a normal IEPE accelerometer and not through the negative-voltage proximity probe input..
200150 Sensor Summary
Typical application-note values include 100 mV/g sensitivity at 80 Hz, 10 to 1000 Hz frequency range, ±25 g measurement range, 4.7 to 5.5 Vdc excitation, less than 800 µA quiescent current, differential SIG+ / SIG- output, and approximately 2.5 Vdc output bias.
Differential Signal Input Through the MEMS-100 Adapter
The MEMS-100 adapter provides the correct connection path for the 200150. The adapter powers the sensor at 5 V and accepts the differential signal pair through Diff+ and Diff-. Your installation note specifically states that the 200150 is a differential, 5 V powered accelerometer, so the AT-2040 needs the MEMS-100 interface adapter to power and read it.
Eaton CSA55A5CY2202 Wiring Reference
| Eaton Pin | Wire Color | Function | MEMS-100 Terminal |
|---|---|---|---|
| 1 | Brown | Differential Signal | Diff− |
| 2 | Blue | Sensor Power | +PWR |
| 3 | Gray | Differential Signal | Diff+ |
| 4 | Black | Shield / Drain | Not connected |
| 5 | White | Return / Power | −RETURN |
Built-In 200150 Sensor Test Setup
The AT-2040 can be configured with a saved 200150 test profile. Once loaded, the sensor can be selected from Sensor Test → Bently Nevada → 200150, allowing technicians to run the same repeatable test points without manually rebuilding the setup each time.
Test Configuration
| Field | Value |
|---|---|
| Sensor Type | MEMS_1X |
| Units | g |
| Amplitude Mode | Peak |
| Voltage Out | 5.0 V |
| Reference Frequency | 80 Hz |
| Reference Amplitude | 1.0 g |
Automatic Test Points
| Frequency | Amplitude |
|---|---|
| 20 Hz | 1.0 g |
| 50 Hz | 1.0 g |
| 80 Hz | 1.0 g |
| 150 Hz | 1.0 g |
| 200 Hz | 1.0 g |
| 500 Hz | 1.0 g |
| 1000 Hz | 1.0 g |
How the AT-2040 Tests the 200150
Mount the sensor
Install the 3/8-24 mounting stud and mount the 200150 to the AT-2040 shaker table. The installation note states that the 200150 has a 3/8-24 threaded hole and should be tightened using the stud or sensor hex flats, not by applying torque through the sensor body.
Connect through MEMS-100
Connect the 5-pin cable to the sensor and land the sensor wiring into the MEMS-100 adapter. The adapter should be set to SIG+ / SIG- differential mode for the 200150.
Run the saved test profile
Select Sensor Test → Bently Nevada → 200150. The imported setup should show the 80 Hz reference row and seven test points: 20, 50, 80, 150, 200, 500, and 1000 Hz at 1.0 g.
Review and export results
The AT-2040 fills in sensitivity, deviation, and phase as the sweep runs. Results are saved to the report database and can be exported as PDF or CSV. The autotest note shows the AT-2040 reporting sensitivity and deviation for each test point and then saving the result for report export.
Single-Point Live Verification
For quick functional checks, the AT-2040 can drive the shaker at a single frequency and amplitude while reading the 200150 through the MEMS-100 adapter. A common check is 80 Hz at 1.0 g peak with the channel set to MEMS 1X.
At this point, the expected sensor output is approximately 100 mV/g, with the differential bias near 2.5 V.
Bently Nevada and Trendmaster are trademarks or registered trademarks of Baker Hughes. Agate Technology is not affiliated with, sponsored by, or endorsed by Baker Hughes or Bently Nevada. Product names and model numbers are used only to identify sensor compatibility and application use.
