Digital engine tachometer

SE-2500A

The SE-2500A is a battery-powered non-contact handheld engine tachometer designed specifically for gasoline engines, integrating the detection unit, measurement unit, and display unit. By simply bringing the head of the main unit (detection unit) close to the ignition coil, you can measure the engine's rotational speed in units of 1 r/min or 0.01 r/s. The measurement data can be stored in the main unit's memory function for up to 20 data points, making it convenient for later verification.
It comes standard with both analog output (switchable with monitor output) and pulse output. The analog output is for recording purposes with data recorders, etc. (the monitor output is for sensor waveform confirmation or as an input signal for FFT analyzers), while the pulse output can be used as a tracking analysis signal for FFT analyzers.
* The SE-2500A does not include the IP-2800 external sensor.
* We sincerely apologize, but we kindly ask that you prepare the dry batteries yourself.

Inquiry

It is a non-contact type, so it can be measured easily and safely.
You can obtain an accurate rotational speed of 1 r/min or 0.01 r/s.
The backlight function allows you to check the display values even in dark places.
The memory function can save a maximum of 20 data entries.
Standard equipped with analog output and pulse output
Analog output: 0 to 1 V / 0 to F.S (F.S. can be set arbitrarily), 10 bit D/A conversion
Pulse output: Hi +4.5V or higher, Lo +0.5V or lower
The engine speed of the 4-cylinder diesel engine can be measured by the optional detector (VP-201/VP-1210)^＊

Adaptive Engine

Gasoline engine

calculation method

Cyclic Calculation Method

measurement time

1s + within the period time of input signal 1

measurement unit

r/min、r/s

Measurement range

2-cycle	4 cycle	Rotation and Speed
-	1 cylinder	120 to 20,000 r/min
1 cylinder	2-cylinder	120 to 20,000 r/min
-	3-cylinder	120 to 20,000 r/min
2-cylinder	4-cylinder	120 to 20,000 r/min
-	5 cylinders	120 to 20,000 r/min
3-cylinder	6-cylinder	120 to 15,000 r/min
4-cylinder	8-cylinder	120 to 12,000 r/min
-	10 cylinders	120 to 10,000 r/min
-	12-cylinder	120 to 8,000 r/min

*For r/s, divide the above r/min value by 60 to obtain the range.

measurement accuracy

Displayed value^＊×(±0.02%)± 1 count (＊Displayed value is the count value excluding the decimal point)

detection method

electromagnetic induction method

detection distance

10 to 200 mm

target of detection

ignition coil

Selection of the number of cylinders and cycles.

by the built-in signal selector

Display Section

5-digit, LCD display, 7-segment, with backlight (character height: 10.2 mm)

Overrange function

When the measurement value exceeds the display range, an over range (ERROR mark) is displayed.

Rotation upper limit warning function

When the rotational speed exceeds the preset upper limit, the upper limit warning (↑ mark) is displayed.

Analog Output

Output
Output voltage: 0 to 1 V/0 to full scale (full scale is set arbitrarily)
Conversion method: 10 bit D/A conversion method
Linearity: ± 1 %/full scale
Output update time: within 50 ms + 1 cycle time
Temperature stability: ±0.05 %/full scale/°C (span & zero)
Setting error: ±0.5 %/full scale
Load resistance: 100 kΩ or more

monitor output

Analog output for monitoring after waveform shaping of sensor signals
(Used in conjunction with the above rotational speed analog output)
Load resistance: 100 kΩ or more

Pulse output

One pulse output for each signal detection
Output voltage: Hi +4.5 V or higher, Lo +0.5 V or lower
Output logic: positive logic
Load resistance: 100 kΩ or higher

Operating Temperature Range

0 to +40 °C

Storage Temperature Range

−10 to +50 °C

Power Supply

Four AA batteries ^※ (1.5V) or dedicated AC adapter PB-7090 (optional)

battery lifespan

More than 32 hours (with backlight off), 8 hours (with backlight on)

Battery warning display

When the battery voltage drops below approximately 4.4 V, a warning mark (LOW mark) will be displayed.

Outline Dimensions

198.5 (L) × 47.5 (H) × 66 (W) mm