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Digital Engine Tachometer SE-1100 1.3 STANDARD ACCESSORIES
Your package should contain the following materials. Please make sure that you have received all these items upon unpacking.
1.2 FEATURES
Thank you for your selection of the SE-1100 Digital Engine Tachometer. To ensure that you get the most out of the instrument, we
strongly recommend you read and follow the instructions in this manual carefully.
Non-contacting detection enables an easy and safe mea-
surement.
It assures an accurate measurement because the signal
indicator (red LED lamp) shows how the signal is captured.
Accurate rotational speed can be obtained in 1 r/min unit.
When the battery runs out or the voltage drops, the "B" mark
at the upper right corner of the display panel lights up.
The five-digit LCD is suitable for out-door measurement.
Compact, light weight and easy-to-carry, enabling one-hand
measurement.
Digital Engine Tachometer SE-1100 ............................. 1
Size AAA Battery .......................................................... 3
Instruction manual .......................................................... 1
Exclusive screwdriver .................................................... 1
(Stored in the Battery case)
Power switch
By keeping this switch depressed with a finger the power
is supplied for making measurement and the power is cut
off when the finger is removed.
Detection head
The part detects the rotational signal (ignition pulse) when
placed close to the high-tension wire (ignition cord) of en-
gines.
Indicator
This blinks when the sensor circuit detects the rotation
signal (ignition pulses).
PULSE/R (SIGNAL SELECTOR)
This is a switch to select the number (PULSE/ R: the num-
ber of ignition pulses per rotation). The number of the
"PULSE/R" varies depending upon the number of cylin-
ders and cycles of the engine. Set the number appropri-
ate for engine to be measured.
Battery cover
The cover is removed by pushing and sliding it in the di-
rection indicated by an arrow when the batteries are re-
placed.
LCD Display
This indicates a 5-digit measurement value associated with
the measurement unit of "r/min".
"OVER" indicator
"OVER" indicator appears on the display when the rota-
tional speed exceeds the measuring range.
"B" mark
"B" mark appears on the display when the batteries have
been discharged. Replace the batteries as soon as pos-
sible.
Exclusive screwdriver.
This is used for turning the signal selector
.
2.2 ABOUT THE BATTERIES
This instrument operates on three Size AAA dry cell batteries.
When the batteries have been discharged, the LCD display
shows a "B" mark. Be sure to replace all three batteries with
new batteries when this has happened.
How to replace the batteries
(1) Remove the battery cover by sliding out it while press-
ing the knob.
(2) After removing the existing batteries, insert new batter-
ies with care not to reverse their polarity.
(3) Close the battery cover.
r/min
B
OVER
r/min
B
OVER
3/2
(PULSE/R)
5/2
2
1
1/2
6
4
3 LCD Display
"B" mark Copyright c ONO SOKKI CO., LTD.
2000 All rights reserved.
SE-1100
SE-1100
ENGIN
E TACHOMETER Digital Engine Tachometer SE-1100
Size AAA Battery
Instruction manual
Exclusive screwdriver
WARNING
Do not drop or give strong shocks to the SE-1100. It con-
tains precision electronic components which can be dam-
aged by dropping or strong shocks.
Be sure to remove batteries when not using the SE-1100
for an extended period of time. If the SE-1100 left with
discharged batteries or unused for a long time with bat-
teries inside, it may be damaged by battery leakage.
CAUTION
If the outer case becomes soiled, wipe it with a dry soft
cloth or with a cloth slightly dampened with a neutral de-
tergent. Avoid volatile organic solvents such as thinners,
benzine and alcohol.
1. GENERAL DESCRIPTION
1.1 OUTLINE
The SE-1100 hand-held engine tachometer displays rotational
speed of gasoline engines in 1 r/min unit. It is a non-contacting
type tachometer which easily measures the rotational speed
just by bringing the detection head close to the high-tension
wires of gasoline engines.
Its one unit construction containing the detector, the counter
and the display as well as batteries are convenient for use at
any places.
WARNING
Moving engine components.
Wear safety goggles.
Keep self and tools clear of moving parts.
Moving components can cause injury.
WARNING
Care should be taken not to touch the rotating parts and
heated parts of the engine when making measurements.
CAUTION
Do not ever bring the SE-1100 in contact with high-ten-
sion wires. Particularly, in the vicinity of the ignition plugs,
the high voltage may cause malfunctions or damages. If
an irregular display occurs due to an accidental contact
with the high-tension cords, turn off the power and then
turn it on again.
CAUTION
Do not bring the SE-1100 in contact with heated parts such
as exhaust pipes.
Do not use the SE-1100 at a location subjected to sudden
temperature changes. Do not hastily move the SE-1100
from high temperature to low temperature environments
or vice versa to prevent internal condensation which may
cause an equipment failure.
Be careful not to allow water or dust to intrude inside the
cabinet. Do not use the SE-1100 at a location where it
may be exposed to splashing water, excessive moisture
or dust.
2. HOW TO USE
2.1 NAME AND FUNCTION OF EACH PART
DIGITAL ENGINE TACHOMETER
SE-1100
INSTRUCTION MANUAL
Copyright c ONO SOKKI Co., Ltd.
2002 All rights reserved.
*Outer appearance and specifications are subject to change
without prior notice.
HOME PAGE
: http://www.onosokki.co.jp/English/english.htm
WORLDWIDE
Ono Sokki Co., Ltd.
1-16-1 Hakusan, Midori-ku,Yokohama 226-8507, Japan
Phone : +81-45-935-3976
Fax
: +81-45-930-1906
E-mail : overseas@onosokki.co.jp
U.S.A.&CANADA
Ono Sokki Technology Inc.
2171 Executive Drive, Suite 400, Addison, IL60101, U.S.A.
Phone : +1-630-627-9700
Fax
: +1-630-627-0004
E-mail : info@onosokki.net
EUROPE
Ono Sokki Mess-und Kontrollsysteme GmbH
Im Vogelsang 1, D-71101 Schoenaich, Garmany
Phone : +49-7031-630203
Fax
: +49-7031-654249
E-mail : onogermany@aol.com
GENERAL OPERATING PRECAUTIONS
B00001762 / IM01091401(5) 025(MS)060 Applicable engine type
: Gasoline engine
2-cycle (1, 2, 3, 4-cylinder)
4-cycle
(1, 2, 3, 4, 5, 6, 8, 12-cylinder)
Detection method
: ignition spark noise detection
Detecting object
: High-tension wire
(ignition cord)
Detection distance
: 30 ~ 200mm
3.2 Measurement section
The number of "pulse/R", types of engines and the range of
measurement are as follows :
Display
: 5-digit LCD
Measurement display time : 1second, automatic repeating
Accuracy
: 100 ~ 12,499r/min :
± 1r/min
12,50~20,000r/min :
± 2r/min
(1) Initial operation
"SIGNAL SELECTOR" rotary switch inside the battery box
has been set at 1/2 P/R position at the time of delivery.
Reset the switch to an appropriate number for the engine
to be measured carefully referring to Paragraph 2.4 for
the number of the PULSE/R.
(2) 1-cylinder gasoline engine
When the detection head is placed close to the high-ten-
sion wire (ignition cord) of the engine while keeping the
power switch button depressed, the indicator starts blink-
ing.
When you bring the detection head closer to the high-
tension wire, the indicator lamp blinks at a constant fre-
quency corresponding to the rotational frequency. (At high
rotational speed the lamp looks as if glowing without blink-
ing). This is the measuring position.
2.3 MEASURING METHOD
3~20 cm
Note: Do not bring MT136A in
contact with high-tension
wires which may result in
erroneous measurement.
Bring the head closer until the
blinking frequency becomes
constant. (At high rotational
speed the lamp looks as if
glowing without blinking).
Indicator
High-tension wire
Ignition plug
(Figure A)
The distance between the high-tension wire and the mea-
suring position varies depending on engines but it nor-
mally is 3~20cm.
(3) Distributor type multi-cylinder gasoline engine
As shown in the figure B.C, bring the detection head close
to the high-tension wire that connect the distributor and
the ignition coil, or to the place where all the high-tension
wires of the cylinders are bundled together.
3~20 cm
(Figure B)
Note: Do not bring it in contact with
the high - tension wires.
Ignition plug
Where all the high-tension wires
of cylinders are bundled together.
Bring the head closer until the
blinking frequency becomes
constant. (At high rotational
speed the lamp looks as if
glowing without blinking).
3~20 cm
Note: Do not bring the MT136A
in contact with the High-
tension wires.
(Figure C)
High-tension wire connecting
distributor and ignition coil.
Bring the head closer until
the blinking frequency
becomes constant. (At high
rotational speed the lamp
looks as if glowing without
blinking).
Just as in the case of 1-cylinder engines, make the mea-
surement at the position where the indicator blinks at a
constant frequency corresponding to the rotational speed.
The blinking frequency decreases when the detection head
is placed too far from the tension wire connecting the dis-
tributor and the ignition coil, or close to the singled (not
bundled) tension wire. In this case, the ignition pulse of
each cylinder cannot be detected uniformly.
(4) Multi-cylinder gasoline engine without distributor
Bring the detection head close to the place where the high-
tension wire of each cylinder is bundled together.
The measurement is impossible if all the high-tension wires
are not bundled together since the distance between the
detection head and each high-tension wire differs.
(5) Measurement precaution .
Do not put any obstacle between the SE-1100 and high-
tension wires. The accurate measurement is impossible if