- A frequency accelerometer that inputs pulse signals from rotation sensors and other devices to simultaneously measure the speed and acceleration (rate of change) of rotating or linearly moving objects.
- Speed and acceleration are output simultaneously via analog outputs (optional), allowing the relationship between the two parameters to be recognized at a glance.

Sinusoidal Speed (Frequency) Change Triangular Speed (Frequency) Change			- Speed Input - Acceleration Output
		Example When an encoder is attached to a motor shaft

[Application Examples]

Speed and Acceleration Measurement for Dynamometers, Alternators, etc.

It is crucial to simultaneously measure speed and acceleration variations during startup (cranking), idling, and normal running states.
The Frequency Accelerometer FAM-3921 inputs pulse signals from gear sensors and similar devices, and outputs both speed and acceleration simultaneously via analog signals to capture transient phenomena instantly.

Gear Sensors / Pickup Sensors IMG, GP, FDP Series Gear Key Points • Startup / Starter Cranking • Idling State • Acceleration changes during running Simultaneous Speed & Acceleration Analog Output 1ms Update Rate	Single Input → Pulse Signal	Frequency Accelerometer FAM-3921	→ Analog Output	Acceleration Analog Output
				Starter Cranking	Idling	Acceleration Changes	Idling
				Simultaneous Speed & Acceleration Analog Output
				Speed Analog Output
				Starter Cranking	Idling	Running State	Idling

Periomatic™ Calculation High precision from ultra-low to high speeds. Follows rapid changes and sudden stops flawlessly.

[Standard Specifications]

Compatible with Various Input Signals

Supports a wide variety of sensors with frequency pulse outputs (logic, zero-cross), including magnetic gear speed sensors, magnetoelectric pickups, flow sensors, rotary encoders, photoelectric sensors, and linear scales.

Gear Sensors > View Lineup

Flow Sensors > View Lineup

Rotary Encoders

Wide Range Measurement from 0.01Hz to 100kHz

Acceleration Calculation for Continuous Phenomena from Low to High Speeds

By digitally computing acceleration directly from frequency, it ensures highly accurate, stable, and responsive tracking even through continuous transitions from ultra-low to high-speed zones. This method significantly minimizes calculation errors compared to conventional frequency-to-voltage conversion methods.

Speed/Acceleration Switchable Display

The display can be switched to indicate either speed or acceleration.

Equipped with 2-channel Comparator (Alarm) Outputs as Standard

RS-232 Interface as Standard

Transmits displayed data (both speed and acceleration listed together) to computers or printers via RS-232C digital communication output.

PC	CSS-M06D09 etc.	FAM-3921 Rear Panel

RS-232C Communication Cable (Sold Separately)
CSS-M06D09 (D-SUB 9-pin) or CSS-M06D25 (D-SUB 25-pin)

*Cable length is 2.5m

[Options]

Speed Analog Output: 0 to 10V, Fastest 1ms Update Rate

Acceleration Analog Output: ±10V, Fastest 1ms Update Rate

BCD Output

*With BCD connector installed

RS-485 Interface

Customization Available from a Single Unit. Hundreds of Proven Tracks.

> View Customization Examples

Calibration Available as Embedded Units

Calibration Documents & Traceability Charts Issuable

Enclosure / Box-housed Type (Examples below)	> View Box-housed Types		Functional Modifications
Please consult us regarding your desired enclosure type.			Inputs, Outputs, Calculations, etc. "Want to modify the power supply input" "Want to match output voltage or communication specs to our facility," etc.

Related Products

As a Complete Set

> Flow Sensor Lineup

> Gear Sensor Lineup

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