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7-4-2 Non-contact type pulse sensor
This sensor is used mainly for the measurement for vehicles of 2 cycle / 4 cycle gasoline engine with
distributor type ignition system.
1) Installation procedure
①
Slide the bunchy part
①
on the upper surface of the sensor and the core at the tip will be
opened. Pinch the low voltage primary side cable for IP-292, or high voltage secondary side
cable going to the plug for IP-296, and release the finger. The core will be closed but the tip will
remain slightly opened because of the mechanism to prevent the damage to the core by colliding
with each other. The tip can be completely closed by pushing the slide knob
②
toward the
opening.
②
Connect to “Pulse input” connector on the side of the Proximity Exhaust Noise Measurement
System main body.
③
Run the engine at idling speed. When the pulse is detected, revolution speed will be
displayed on the operation part (wireless). If the measurement is not stable, or if the detection
is not possible, change the direction of the sensor or change the polarity (- / 0 / +) on the panel
of the Proximity Exhaust Noise Measurement System main body.
2) Cautions for handling
* Confirm that cores are contacting closely with each other.
* Pinch the low voltage primary side cable of the ignition coil for IP-292, high voltage secondary side
cable of the ignition coil for IP-296. Be careful that if the electrical system cable is pinched by
mistake, it is not possible to measure the revolution speed.
* Handle with care so that there will be no water droplets, dust, or oil, etc. on the sensor,
especially on the contact surface. If there is such contamination, wipe the surface cleanly with a
soft cloth, etc. before use. If any contamination remains on the contact surface, it will prevent the
accurate detection of the revolution.
* Place the sensor itself at a place with as little vibration as possible. Excessive vibration may
degrade the close contact between cores and prevent the detection.
* Sensor core is made of very brittle material. Avoid applying excessive shock to it. Damaged
core will prevent the accurate detection of the revolution.
* IP-292 (PRIMARY) is indicated on the yellow nameplate for the low voltage primary side, and
IP-296 (SECONDARY) on the green nameplate for the high voltage secondary side. Correct me,
and installation position for compatible sensors are different. Correct measurement will not be
possible if the sensor for different purpose is used.
