
ROTATING OBJECT
GasolineEngineTachometer
SE-1520
OperatingManual
Warning
• Before attaching the detector or performing wiring work, be sure to
stop the engine under measurement.
• During measurement, never get close to the engine because a part of
you body or cloth may be caught.
1.Overview
The SE-1520 is a tachometer designed for gasoline engines with any number of
cylinders.
2.Operations
• Connect the signal cable of the detector (IP-292 or IP-3000) to (4) SIG IN.
• Using the switch (5), select the detector to be used: IP-292 or IP-3000.
• For the detector, clamp the battery side (positive side) of the primary lead of the
ignition coil. Note that, if the power cable is clamped in mistake, rpm measure-
ment will be disabled.
• The switch (6) is a power switch and a number-of-cylinders selector switch. When
the power is turned ON, select the number of cylinders according to the engine
under measurement. Set the switch to the same position for each of the following:
1-cylinder 2-cycle engine and 2-cylinder 4-cycle engine
2-cylinder 2-cycle engine and 4-cylinder 4-cycle engine
3-cylinder 2-cycle engine and 6-cylinder 4-cycle engine
• In addition, depending on the specification of an ignition coil, rpm may be dis-
played twice. In this case, please change a setup of the number of cylinders.
• When you turn ON the power using the switch (6), the pilot lamp (PL) (7) goes
on. When the engine starts, the indicator (IND) (8) goes on and the rpm meter (10)
indicates the engine rpm.
If selection of the number of cylinders is correct, the engine rpm can be read
directly.
• If the indicator (IND) (8) does not go on, check the connection between the detec-
tor and SIG IN (4) and detector attachment. When the IP-3000 is used, adjust the
level using LEVEL ADJUST (9).
3.OUTPUT Connection
When using the analog output (2) or pulse output (3), connect it to each instrument
using the supplied cable.
Both outputs are float-grounded and insulated from case of the the main unit.
3.1 ANALOG OUTPUT
Outputs a 0-10V analog signal with respect to 0-10,000 r/min. Connect the white
cable to the positive side and the green cable to the negative side to provide a
load of 10 kΩor more. Be careful not to short-circuit the output.
3.2 PULSE OUTPUT
Outputs a square wave with 8ms pulse width and 5V amplitude after converting
the input signal into pulses, 1 pulse for each 2 rotations. Connect the white cable
to the positive side and the green cable to the negative side.
4.Specifications
Applicable engine : 2-cycle engines (1, 2 or 3 cylinders)
4-cycle engines (2, 3, 4, 5, 6 or 8 cylinders)
Measurement range : 2-cycle engines
1 or 2 cylinders 500 to 10,000 r/min
3 cylinders 500 to 8,000 r/min
: 4-cycle engines
2-5 cylinders 500 to 10,000 r/min
6 cylinders 500 to 8,000 r/min
8 cylinders 500 to 6,000 r/min
Rpm meter : Class 1.5, 100mm wide angle meter
Power supply : 12VDC or 24VDC (negative ground)
Current consumption : About 200mA (when operating on 12VDC)
Operating
temperature range : 0°C to +40°C
Dimensions : 180(W) ×121(H) ×144(D)mm
Output signal : Single-ended float-ground for both outputs
Analog output : 0 to 10V voltage (with respect to 0 to 10,000 r/min)
Output voltage
accuracy : Zero : ±0.2% / full scale (25°C)
Span : ±0.3% / full scale (25°C)
Linearity : ±0.2% / full scale or less
Ripple : 250mVp-p or less (5000 r/min)
Output impedance : 1Ωor less (R.T)
Response : 0.5 sec. or less
(10 to 90% of full scale)
Connectable load : 10 kΩor more
(ground common to pulse output)
Pulse output : Output waveform : Square wave with 8ms pulse width
(Outputs the input signal, 1 pulse for
each 2 rotations.)
Voltage : High level About 5 V
Low level About 0.3 V
Output impedance 4.7 kΩor less
Accessories : Analog output signal cable (1.9m) ×1
Pulse output signal cable (1.9m) ×1
Power cable (3.4m) ×1
Operating manual ×1
5.Cable wiring diagram
ONOSOKKI
PL IND
OFF
2
1
34
2
5
8
3
6
CYLINDER
SELECT
LEVEL
ADJUST
2CYCLE
4CYCLE
0
1
2
3
45
x
1000
r/min
6
7
8
9
10
T
O
K
Y
O
O
N
O
S
O
K
K
I
J
A
P
A
N
SE-1520
ENGINE TACHOMETER
DC12 or 24 V
OUTPUT
ANALOG PULSE
SIG IN
IP-3000 IP-292
144
10˚
(116)(
6)
181
(11)
(1) (2) (3) (4)
(5)
(6)
(7) (8) (9)
(10)
12 AC A
BB
C
+
Red
–
Black
+
White
–
Green
+
White
–
Green
Chassis
ground
Chassis
ground
DC12 OR 24 V ANALOG PULSE
Connector plug
Connector receptacle
Manufacturer
RM12BPG-2S
RM12BRB-2P
Hirose Electric
R03-PB3M
R03-R3F
Tajimi Electronics
R03-PB3M
Power supply ANALOG PULSE
R03-R3F
Tajimi Electronics
Connectors and manufacturers
Warranty
1. This product is covered by a warranty for a period of one year from the date of purchase.
2. This warranty covers free-of-charge repair for defects judged to be the responsibility of the manufac-
turer, i.e., defects occurred while the product is used under normal operating conditions according to
descriptions in this manual and notices on the unit label.
3. For free-of-charge repair, contact either your sales representative or our sales office nearby.
4. The following failures will be handled on a fee basis even during the warranty period.
(a) Failures occurring through misuse, mis-operation, or modification
(b) Failures occurring through mishandling (dropping) or transportation
(c) Failures occurring through natural calamities (fires, earthquakes, flooding, and lightening), environmental
disruption, or abnormal voltage.
* For repairs after the warranty period expired, contact your sales representative or our sales office nearby.
■OmissionofTestQualificationIssuance
Since this product has been tested through a series of strict inspections and a complete
program of quality control, issuance of the test qualification has been omitted.
*Outer appearance and specifications are subject to change without prior notice.
HOMEPAGE: http://www.onosokki.co.jp/English/english.htm
WORLDWIDE
Ono Sokki Co., Ltd.
1-16-1 Hakusan, Midori-ku,
Yokohama 226-8507, Japan
Phone : 045-935-3976
Fax : 045-930-1906