Gasoline Engine Tachometer SE-2500

Product Brochures (PDF) Outer Dimension (PDF)

SE-2500 is a handheld tachometer by non-contact method, which the detection, measurement and displaying portion are combined with built-in batteries and is designed to measure the revolution of the gasoline engine exclusively. By closing the detector (head position) to the ignition coil, the engine revolution can be measured at the unit of 1 r/min or 0.01 r/s. Further, remote measurement is possible by using the IP-2800 detector which is provided as standard accessory. The max. 20 measurement data can be stored internally by memory function which is convenient for later checking. Both analogue (which can be switched over to monitor also) and pulse output function are provided as standard. Analogue output signal can be used for the recording the signal from data recorder and so on. Monitoring output signal can be used for checking the sensor’s detection waveform or as the input signal by FFT analyzer. Pulse output signal can be used as external clock signal for tracking analysis by FFT analyzer. IP-2800 External Sensor (Accessory)

Features

• Built-in memory function 20 data (MAX) can be saved to memory.

• Three outputs—analog, monitor and pulse—provided as standard

  Use the analog output function to record the number of rotations, the monitor output function to check the sensor’s detection waveform, and the pulse output function to output rotation synchronization signals.

• Large LCD with backlight

  (Character height: 10.2 mm)

• Capable of performing measurement at a distance of 1 m when the external sensor (IP-2800) is used.*

• Can be mounted on a tripod

  The tachometer can be fixed to a tripod for continuous measurement.

• Measurement can be performed in 1 r/min or 0.01 r/s units.

*Measurement is impossible depending on the type of the engine.

Measurement method

Specifications Summary

Applicable engines	Gasoline engines 2-cycle (1, 2, 3, 4 cylinders),  4-cycle (1, 2, 3, 4, 5, 6, 7, 8, 10, 12 cylinders)
Detection method	Electromagnetic induction
Detection distance	10 to 200 mm
Object of measurement	Ignition coil
Calculation method	Cycle calculation method
Measurement time	Within 1 s + the time required for one cycle
Display	5-digit LCD, with backlight (character height: 10.2 mm)
Display update time	1 ±0.2 s
Measurement units	r/min, r/s
Measurement ranges	2-cycle 4-cycle Number of rotations (r/min) - 1 cylinder 120 to 20000r/min 1cylinder 2 cylinders 120 to 20000r/min - 3 cylinders 120 to 20000r/min 2 cylinders 4 cylinders 120 to 20000r/min - 5 cylinders 120 to 20000r/min 3 cylinders 6 cylinders 120 to 15000r/min 4 cylinders 8 cylinders 120 to 12000r/min - 10 cylinders 120 to 10000r/min - 12 cylinders 120 to 8000r/min (r/s is the numerical value obtained when the r/min measurement value is divided by 60)
Measurement accuracy	Displayed value* x (±0.02%) ±1 count * The displayed value is the count value excluding figures after the decimal point.
Memory function	20 data (MAX)
Over-range function	The over-range alarm (ERROR mark) is displayed when the measured value exceeds the display range.
Rotation upper limit alarm function	The upper limit alarm ( mark) is displayed when the number of rotations exceeds the preset upper limit value.
Sensitivity adjustment function	A rotary dial at the right-hand side of the device is used to adjust the sensitivity.
Analog output	Output with respect to the displayed rotation values Output voltage: 0 to 1 V/0 to FS (FS is freely selectable) Conversion method: 10-bit D/A conversion Linearity: ±1%/FS Output update time: Within 50 ms + the time required for 1 cycle Temperature stability: ±0.05%/FS/°C (span & zero) Setting error: ±0.5%/FS Load resistance: At least 100 kΩ
Monitor output	Analog output for monitoring purposes after waveform reshaping of the sensor signal Load resistance: At least 100 kΩ
Pulse output	1 pulse output per signal detection Output voltage: Hi level: At least +4.5, Lo level: Up to +0.5 V Output logic: Positive logic Load resistance: At least 100 kΩ
Power source	Four AAA alkaline batteries or exclusive AC adapter (PB-7090, Option)
Battery life	At least 32 hours (when the backlight is OFF) At least 8 hours (when the backlight is ON)
Low battery alarm indicator	A low battery alarm (LOW mark) is displayed when the battery voltage falls below 4.4 V.
Operating temperature range	0 to 40°C
Storage temperature range	-10 to 50°C
Outer dimensions	198.5 (W) x 47.5 (H) x 66 (D) mm
Weight	Approx. 300 g (including batteries)
Accessories	Ignition detector (IP-2800) , AAA alkaline batteries × 4, Carrying case

 

Options

LA-0203A Tripod	HT-0522/0521A Magnetic stand/Stand jig	PB-7090 AC adapter

Revised: 2010/12/14