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Rotational speed measurement of an engine
using a microphone or an accelerometer
The FT-2500 can measure the rotational speed of an engine by the sound and
vibration related to the movement of the pistons. It is effective when the
rotational sensor cannot be attached because the engine compartment is
covered.
•
Set the number of pulses to match the number of ignition firings per one
crankshaft rotation.
(e.g.) Set at 2 P/R in the case of a four-cylinder engine with four-cycle
MI-1235/1433
1/2-inch Measurement
Microphone
Advanced Tachometer FT-2500
MI-3111
Microphone
UPPER
LEVEL
Preamplifier
LOWER
COMP
SENS
MENU
SET
NEXT
KEY PROTECT
SAMPLE
RECALL
ROTATION
Advanced Tachometer
FT-2500
Rotational speed measurement of an engine
using a cigarette lighter socket sensor
Connect the sensor to a power outlet in a car or construction machine. With
the FT-2500, you can determine rotational speed of the engine by measuring
the ignition noise from the power outlet. Can be used with both 12 and 24 VDC
batteries.
Advanced Tachometer
FT-2500
Cigarette Lighter Socket Sensor
Rotational speed measurement of a motor
By detecting magnetic flux change, you can perform the rotational speed
measurement of a motor in a hybrid/electric car or the motor in its air
conditioner. Using the OM-1200, which detects magnetic flux leakage from an
object, you can measure the rotational speed of the motor even if the rotating
shaft is not directly accessible.
Motor/Gasoline Engine RPM Detector
OM-1200
A d v a n c e d Ta c h o m e t e r
Accelerometer
Engine frame etc.
FT-0801
Advanced Tachometer FT-2500
UPPER
LEVEL
SET
LOWER
COMP
SENS
MENU
NEXT
KEY PROTECT
SAMPLE
RECALL
ROTATION
Advanced Tachometer
FT-2500
FT-2500
Rotational speed measurement of an engine
using an engine rotational sensor
The rotational speed of an engine can be measured by clamping a sensor to the
primary low-voltage or secondary high-voltage conductor. Measurement can be
performed simply by inputting the number of ignitions per rotation.
•
Set the number of pulses to match the number of ignition firings per one rotation.
(e.g.) In the case of a four-cycle engine
If you perform the measurement on the primary side, set the number of
pulses at half number of cylinders.
If you perform the measurement on the secondary side, set at 0.5P/R
because one pulse is generated per two rotations.
Clamp the secondary conductor
Ignition Pulse Detector
(IP-296/IP-3100)
Clamp the primary conductor
Ignition Pulse Detector
(IP-292/IP-3000A/IP-3100)
Take care with the direction
OM-1200
(Mounted parallel to the ignition coil)
Ignition coil
Rotational speed measurement of an engine
from muffler's sound using a microphone
This example shows how to measure the rotational speed of an engine from
muffler's sound. Since the pulsation component of the engine rotation is
included in the muffler's sound, the engine's rotational speed can be obtained
by the frequency component of this pulsation.
•
Set the number of pulses to match the number of ignition firings per one
crankshaft rotation. Please note, however, that depending on muffler
performance, there may be cases that measurement cannot be performed.
•
Muffler's sound level and engine rotational speed can be measured
simultaneously using the FT-2500 in combination with the LA-3000 series Sound
Level Meter. By using a comparator function of the FT-2500 and an external
control function of the LA-3000 series, you can measure the sound level after
getting the specified rotational speed.
Advanced Tachometer FT-2500
UPPER
LEVEL
SET
LOWER
COMP
SENS
MENU
NEXT
KEY PROTECT
SAMPLE
RECALL
ROTATION
Comparator
Advanced Tachometer
function
FT-2500
Sound level meter
* If you would like to measure proximity noise while stationary, please contact us.
Rotational speed measurement of a dryer
and an electric drilling machine using an accelerometer
By the rotational vibration, the FT-2500 can measure the rotational speed of a
motor which is built into the dryer, electric drilling machine or the similar
equipment even though the motor is not accessible.
Accelerometer
NP-3000 series
Advanced Tachometer FT-2500
UPPER
LEVEL
SET
LOWER
COMP
SENS
MENU
NEXT
KEY PROTECT
SAMPLE
RECALL
ROTATION
Advanced Tachometer
FT-2500
Electric drilling machine
Advanced Tachometer FT-2500
UPPER
LEVEL
SET
LOWER
COMP
SENS
MENU
NEXT
KEY PROTECT
SAMPLE
RECALL
ROTATION
Advanced Tachometer
FT-2500
MI-1235/1433
1/2-inch Measurement
Microphone
MI-3111
Microphone
Preamplifier
LA series
Accelerometer
NP-3000 series
Dryer
5
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